OTH: Viet Nam: Power Transmission

Power Transmission Investment Program (RRP VIE 42039)

Feasibility Study

Project Number: 42039-034 November 2011

Multitranche Financing Facility Socialist Republic of Viet Nam: Power Transmission Investment Program

Summary Report 500/220 kV Bac Ninh 2– Pho Noi Transmission Lines 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

TABLE OF CONTENTS Chapter 1 : 3

NECESSITY AND OBJECTIVES OF THE PROJECT 3

1.1 Necessity of the project 3 1.2 Objective of the project 3

Chapter 2 : 4

PRESENT STATUS OF NORTH VIET NAM 4

2.1 Natural features and administration of the project area 4 2.2 Status of power system of the project area 4 2.3 Developing orientation of power sources and network 5

Chapter 3 : 9

LOAD FORECAST 9

3.1 Load forecast 9 3.2 Power flow calculation 11

Chapter 4 : 12

CONSTRUCTING SITE AND SCOPE OF THE PROJECT 12

4.1 Constructing site and the line route 12 4.2 Scope of Project 13

Chapter 5 : 14

TECHNICAL SOLUTIONS 14

5.1 Electrical solutions 14

Insulators 14 Calculation results 15 o Voltage of 220kV 15 o Voltage of 500kV 15 NOTE: Contamination level is 2.0cm/kV 15

5.2 Main construction solutions 16

Foundation solutions 16 Choosing materials 16

2 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Chapter 1 :

NECESSITY AND OBJECTIVES OF THE PROJECT

1.1 Necessity of the project Bac Ninh province is located in key economic areas - growth triangle: Ha Noi - HaiPhong - Bac Ninh 2; near the area, the region's major industrial center in the North.

Because of such importance, provincial leaders and EVN (Electricity of VietNam) have attended to the construction of infrastructure, especially electricity.

According to the result of balanced power of Bac Ninh province, to meet the load demand in 2015, need to build 220kV Bac Ninh 2 substation with a capacity of 3x250MVA and 220kV Bac Ninh 3 substation with a capacity of 3x250MVA.

Therefore, the construction of transmission line 500/220kV Bac Ninh 2 – Pho Noi to power 220kV Bac Ninh 2 substation and associated 500kV grid northern region is needed.

1.2 Objective of the project - Receiving power from 500/220kV Pho Noi substation and supplies power with 220kV Bac Ninh 2 substation to provide electricity for the Western – Southern region of Bac Ninh province, and partial support for Bac Ninh city.

- Overload protection for 220kV & 110kV grids.

- Linking 500kV-220kV power grid in Northern region and ensuring national energy security.

- Saving land in Bac Ninh province.

3 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Chapter 2 : PRESENT STATUS OF NORTH VIET NAM

2.1 Natural features and administration of the project area Bac Ninh is a province in the northern delta region, fits in the Red River Delta, adjacent to Hanoi. - In the North : borders on Bac Giang province - In the South : borders on Hung Yen province and a part of Hanoi - In the East : borders on Hai Duong - In the West : borders on Hanoi Bac Ninh province has eight district-level administrative units, including Bac Ninh city and seven districts of Bac Ninh is: Yen Phong, Que Vo, Tien Du, Tu Son, Thuan Thanh, Gia Binh Luong Tai. In recent years economic and social of Bac Ninh has made development, gross domestic product GDP average growth of 12.9%. Structural economic shifts towards industrialization.

2.2 Status of power system of the project area

Bac Ninh province is now mainly supply from national grid by regional transmission grids and power stations as: o Bac Ninh 220kV station is receiving power from Pha Lai Thermal Power Plant by 220kV Pha Lai – Bac Ninh transmission line and from 220kV Soc Son substation by 220kV Soc Son – Bac Ninh transmission line; and supplies for 110kV substation as: Que Vo, Kinh Noi, Khac Niem, Tien Son, Gia Luong, Binh Dinh, Vo Cuong and Dap Cau Glass. o 110kV grid region is supported from sources surrounding the following: . From Pha Lai Thermal Power Plant by double circuit 110kV Pha Lai - Bac Ninh transmission line, wire AC-150, 21.8 km. . From 220/110kV Dong Anh substation by double circuit 110kV Dong Anh – Bac Ninh transmission line, wire AC-150, 35.8km. . From 220/110kV Dong Anh substation by single circuit 110kV Dong Anh - Dinh Tram transmission line, wire AC-185, 36.8km.

4 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

. Table 2-1: List of existing 220kV, 110kV transmission lines of the Bac Ninh area

Name of transmission No. Conductor Length (km) Note line I 220kV T/L 1 Pha Lai – Bac Ninh ACSR-520 24 2 Soc Son – Bac Ninh ACSR-520 46,1 II 110kVT/L 1 Bcc Ninh - Pha Lai ACSR-150 2x21,8 2 Gia Lương branch turn ACSR-185 1x8,0 3 Binh Đinh branch turn ACSR-185 1x9,2 4 Bac Ninh - Kinh Noi ACSR-150 2x9 5 Kinh Noi - Tien Son ACSR-150 2x6,5 6 Tien Son - Chau Khe ACSR-150 2x11,25 7 Chau Khe - Đong Anh ACSR-150 2x9 8 Đong Anh - Vo Cuong ACSR-185 1x22,5 9 Vo Cuong branch turn ACSR-185 1x3 10 Vo Cuong - Đap Cau ACSR-185 1x6,9 11 Đap Cau - Đinh Tram ACSR-185 1x8,2

Table 2-2: List of existing 220kV, 110kV substations of the Bac Ninh area

No. Name of substation Capacity (MVA) Note 1 220kV Bac Ninh 125+250 2 110kV Gia Luong 1x25 3 110kV Binh Đinh 1x63 4 110kV Kinh Noi 1x10 5 110kV Tien Son 40+63 6 110kV Que Vo 1x40 7 110kV Khac Niem 1x20 8 110kV Chau Khe 40+63 9 110kV Kinh Noi 1x10 10 110kV Vo Cuong 3x25 11 110kV Đap Cau 1x6,3

2.3 Developing orientation of power sources and network

Based on "Plan for National Electricity Development for 2006-2015, with perspective to 2025 (overall scheme VI)" was approved by the Prime Minister and "Planning the

5 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

improvement and development of grid Bac Ninh power 2008-2010 period, considering that by 2015” was approved by the Ministry of Industry and Trade, plans to develop regional power grid and Bac Ninh in the period 2008-2010 and in 2011-2015 as follows:

Table 2-3: Developing orientation for 220kV, 110kV T/L of Bac Ninh (2015)

Scale No. Project Conductor 2008-2010 2010-2015

I 220kV T/L

B ac Ninh 3 branch turn AC-2x330 2 x 7km

Long Bien - Bac Ninh 2 AC-500 2x28,5km

II 110kV T/L

1 Bac Ninh - Tien Son AC-240 2x27km

2 Bac Ninh - Đai Kim - Bac Giang AC-300 2x20km

3 Yên Phong branch turn AC-300 2x8km

4 Yen Phong - Yen Phong 2 AC-300 2x7km

5 Thuan Thanh 2 branch turn AC-240 2x4,5km

6 VSIP branch turn AC-240 2x3km

7 Que Vo 2 branch turn AC-185 2x1km

8 Khac Niem branch turn AC-185 2x0,5km

9 Thuan Thanh 2 - Thuan Thanh 3 AC-240 2x7km

10 Hanaka branch turn AC-300 2x5km

11 Binh Đinh - Hung Yen AC-240 2x12km

12 220kV Bac Ninh 2 substation feeder AC-240 6x0,2km

13 220kV Bac Ninh 3 substation feeder AC-300 4x0,5km

14 Bac Ninh 3 - Yen Phong AC-300 2x7km

6 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Table 2-4: Developing orientation for 220kV, 110kV substation of Bac Ninh (2015)

Scale (MVA) No. Project 2008-2010 2010-2015

I 220kV substation

New construction

1 220kV Bac Ninh 2 2x500

2 220kV Bac Ninh 3 2x500

Improved capacity

220kV Bac Ninh 2x500

II 110kV substation

New construction

1 110kV Yen Phong 1x63 1x63

2 110kV Yen Phong 2 1x63 1x63

3 110kV Đai Kim 1x63 1x63

4 110kV VSLP 1x63 1x63

5 110kV Thuan Thanh 2 1x40 1x40

6 110kV Que Vo 2 1x40 1x40

7 110kV Khac Niem 1x63 1x63

8 110kV Thuan Thanh 3 1x63 1x63

9 110kV Bac Ninh 2 1x63

10 110kV Hanaka 1x63

Improved capacity

1 110kV Chau Khe 1x63

2 110kV Vo Cuong 2x80

7 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

3 110kV Gia Luong 1x25 1x40

4 110kV Binh Đinh 1x63

5 110kV Que Vo 1x40 1x63

6 110kV Tien Son 1x63

8 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Chapter 3 :

LOAD FORECAST

3.1 Load forecast Based on topography, existing economic partitions and economic development plans of the Bac Ninh province, there are 2 load zone as follows:

Zone 1: comprises Bac Ninh city, Yen Phong district, Tu Son district, Tien Du district and Que Vo district.

Zone 2: comprises Thuan Thanh district, Luong Tai district and Gia Binh district.

Zone 1 is now supplied power from 110kV Vo Cuong substation and 110kV Dap Cau substation. Zone 2 is now supplied from 110kV Gia Luong substation and 110kV Binh Dinh substation.

Based on "Planning the improvement and development of grid Bac Ninh power 2008- 2010 period, considering that by 2015” was approved by the Ministry of Industry and Trade, power demand of each area as follows in table 3-1:

9 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Table 3-1: Load data of each area

Agriculture, Industrial & Forestry & Trade & Service Sector management Others Pmax (kW) Construction No. Name of area Fisheries 2010 2015 2010 2015 2010 2015 2010 2015 2010 2015 2010 2015 1 BacNinh city 16.400 27.630 1.110 1.280 2.620 4.930 23.910 34.780 5.040 8.060 35.790 60.620 2 Yen Phong district 84.880 191.59 2.110 2.540 2.540 1.200 20.420 27.550 1.120 3.260 93.330 209.900 3 Tu Son district 95.350 187.450 3.170 3.580 310 4.480 36.300 52.620 9.400 14.420 111.920 226.580 3 Tien Du district 81.480 188.150 1.370 1.690 870 1.330 19.790 28.660 2.340 7.160 89.930. 208.740 5 Que Vo district 98.180 206.820 2.030 2.350 320 1.950 14.070 23.690 1.230 4.040 104.120 223.430 6 Thuan Thanh district 33.170 111.940 660 890 320 960 18.210 28.230 860 2.450 40670 130.240 7 Gia Binh district 2.170 22.715 1.360 1.690 150 500 10.610 16.030 720 1.690 12.570. 33.030 8 Luong Tai district 50.660 94.520 1.810 2.230 310 920 17.300 48.990 690 1580 57.780 124.910 Pmax(kW) 392.000 930.00 13.000 15.000 5.000 15.500 140.000 217.000 19.500 38.700 490.000 1.075.000

10 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report 3.2 Power flow calculation

According to the load flow calculation in 2025, the transmitted power through 500/220kV Bac Ninh 2 - Pho Noi TL such as:

220kV voltage: Smax = 765.4 + j415.8 (MVA)

500kV voltage: Smax = 990.9 + j198.7 (MVA)

11 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Chapter 4 :

CONSTRUCTING SITE AND SCOPE OF THE PROJECT

4.1 Constructing site and the line route

The 500/220kV Bac Ninh 2 – Pho Noi transmission line has total length about 30.5km. The start point is at the 500/220kV Pho Noi substation and end point is at the 220/110kV Bac Ninh 2 substation.

This transmission line passes through 2 provinces: Bac Ninh and Hung Yen.

In Bac Ninh province, length of line route is about 29.3km, and passes through 4 district: Thuan Thanh, Gia Binh, Que Vo, Tien Du.

In Hung Yen province, length of line route is about 1.2km, and passes through Van Lam district.

Generally full of 500/220kV Bac Ninh 2 – Pho Noi transmission line passes through flat country terrain which is planting rice and farm produce of Bac Ninh and Hung Yen province.

This transmission line has 1 crossing wide, Duong river.

The line route is described in table 4-1 as following:

Table 4-1: The number of basic data of 500/220kV Bac Ninh 2 – Pho Noi transmission line.

No. ITEMS UNIT NUMBERS

1 1The length of line km 30.5 2 2Total steering angle angle 26

3 Number of crossing with Highway No.38 times 02 4 Number of crossing with provincial road 282 times 01

5 Number of crossing with provincial road 284 times 01 6 Number of crossing with communal road times 77 7 Number of crossing with Duong river dike times 01 8 Number of crossing with Duong river times 01

9 Number of crossing with canal, width <10m times 63 10 Number of crossing with canal, width >10m times 14

11 Number of crossing with pond, width <100m times 04 12 Number of crossing with pond, width >100m times 05

13 Number of crossing 500kV TL times 01

12 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

No. ITEMS UNIT NUMBERS

14 Number of crossing 110kV TL times 02

15 Number of crossing 0.4÷35kV TL times 11 16 Length of TL passes through land for planting crops km 3 17 Length of TL passes through paddy land km 27,5 18 Number of house in transmission corridor house 02

4.2 Scope of Project

The scope of the project is includes building the 500kV single circuit and 220kV double circuit transmission line on the same pole.

- Voltage: 500kV & 220kV

- Number of Circuits: 01 (500kV) & 02 (220kV)

- Start point: 500kV Pho Noi substation.

- End point: 220kV Bac Ninh 2 substation.

- Total length: 30.5 km.

- Conductor: 4×ACSR330/42 (500kV) & 3×ACSR400/51 (220kV); at the crossing Duong river, using: 4×ASTER-366 & 3×AAAC-400

- Overhead Ground Wires: PHLOX-147 & OPGW-120

- Insulator: U70BL, U120B, U160BS, U300B suspension and tension insulator sets.

- Tower: galvanized steel tower.

- Foundation: Raft foundation made from steel concrete in - situ cast.

- Grounding: directly by 12mm dia galvanized round iron bar combined with galvanized earth-electrode.

13 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Chapter 5 :

TECHNICAL SOLUTIONS

5.1 Electrical solutions

5.1.1 Selection of Voltage level The voltage level has to be selected based on the duty of the line within the network and network planning. Selected voltage levels are based on Vietnamese standard voltage levels:

- Super high voltage level: 500kV.

- High voltage levels: 220kV, 110kV.

- Medium voltage level: 22kV.

According to the power distribution calculation and transmission distance, voltage level is selected 500kV & 220kV.

5.1.2 Selection of Conductor Conductor are selected according to electrical, thermal, mechanical and economic aspected.

In accordance with the result of calculation power flow, the cross-section of conductor used for 500/220kV Bac Ninh 2 – Pho Noi transmission line is 4 × ACSR 330/42 (550kV) and 3 × ACSR 400/51 (220kV).

5.1.3 Selection of Overhead Ground Wires To satisfy requerements of lightning protection of 500/220kV Bac Ninh 2 – Pho Noi transmission line and link optical communication, used two ground wires above the power lines: PHLOX and OPGW (Composite Fiber Optic Overhead Ground Wire).

Caculated cross-section [mm2] of Overhead Ground Wires be selected by taking the limits of temperture rise caused by short-circuited transmission lines.

In accordance with the result of calculation one phase fault, the kinds of Overhead Ground Wires are selected are PHLOX-147 and OPGW120/24 SM-fibres.

5.1.4 Selection of Insulators and Accessories Insulators To satisfy mechanical failing load, insulators of transmission line be used types below: U70BL, U120B, U160BS, and U300B

14 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Glass or porcelain insulator is used for insulator string type. As countermeasure against corrosion of the pin, each insulator shall be armored with a zinc sleeve around the pin shank.

Insulators and fittings must be manufactured in accordance with international standard IEC-305.

Number of insulators per string is calculated in accordance with nominal creepage distance.

Calculation results o Voltage of 220kV

No. Insulator Sign Quantity

1 Single suspension insulator string CĐ 12-1-17 1x17 2 Single suspension insulator string CĐ 16-1-16 1x16 3 Double suspension insulator string CĐVĐ 12-2-18 2x18 4 Double suspension insulator string CĐVĐ 16-2-17 2x17 5 Double suspension insulator string CĐVVS 30-2-17 2x17 6 Double tension insulator string CN 12-2-18 2x18 7 Double tension insulator string CN 30-2-14 2x14 8 Single jumper suspension insulator string CĐL 7-1-17 1x17

o Voltage of 500kV

No. Insulator Sign Quantity

1 Single suspension insulator string CĐ 12-1-37 1x37 2 Double suspension insulator string CĐV 12-2-38 2x38 3 Double suspension insulator string CĐV 16-2-36 2x36 4 Double suspension insulator string CĐVVĐ 16-2-36 2x36 5 Double suspension insulator string CĐVVĐ 30-2-29 2x29 6 Double suspension insulator string CĐVVS 30-2-34 2x34 7 Double tension insulator string CN 16-2-35 2x35 8 Double tension insulator string CN 30-2-29 2x29 9 Double tension insulator string CN 30-2-31 2x31 10 Single jumper suspension insulator string CĐL 7-1-37 1x37

NOTE: Contamination level is 2.0cm/kV

5.1.5 Protection solutions Lightning protection: To reduce of lightning directly striking overhead transmission lines, used two ground wires above the power lines with protect angles 20.

15 500/220kV Bac Ninh 2 - Pho Noi Transmission line Feasibility Study Summary Report

Earthing: Directly grounded GSW conductor at all tower, gantry and tower themselves.

Damper:

Stockbridge vibration dampers are used on ground wires.

5.2 Main construction solutions

5.2.1 Design of the Towers All towers of 500/220kV Bac Ninh 2 – Pho Noi transmission line are designed as self- supporting structure, steel latticed towers type.

Types of basic tower is used for this project are suspension and tension towers.

- The height of suspension towers : 41.5m; 67m, 71m, 77m; 34m, 38m; 57.5m, 61.5m, 69.5m, 73.5m; 102m.

- The height of tension towers : 23.5m, 30m, 40m, 56m; 62m; 34m; 47m, 59m, 64m; 47m, 59m.

5.2.2 Design of the foundation Foundation solutions

Engineering-geology, relief, hydrology along line route is the same kind of relative identical land, so choosing pad-and-chimney foundations are logical and economical.

Choosing materials

2 The foundations steel uses for group A. The steel A1 is Rs=2250kg/cm , the steel A2 is 2 2 Rs=2800kg/cm and the steel A3 is Rs=3650kg/cm . Foundations will be reinforced concrete, in situ cast with 2x4 stones, concrete grade M200. The pave under foundations, in situ cast with 4x6 stones, concrete grade M50.

16 Power Transmission Investment Program (RRP VIE 42039) Feasibility Study

Project Number: 42039-034 November 2011

Multitranche Financing Facility Socialist Republic of Viet Nam: Power Transmission Investment Program

Summary Report Pho Noi 500 kV Substation and Connecting Lines

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

TABLE OF CONTENTS

Chapter1 : General Introduction ...... 3 Chapter2 : Necessity Of Project Investment ...... 4 Chapter3 : Selecting Substation Contruction Location ...... 16 Chapter4 : Main Technological Solutions ...... 17 Chapter5 : Main Solutions Applied For Civil Construction Part ...... 20 Chapter6 : Solution Applied For Connecting Branches ...... 23 Chapter7 : Solution For Substation Service Power Supply Transmission Line ...... 25 Chapter8 : Solution Applied For Telecommunication ...... 26

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 1: GENERAL INTRODUCTION

1.1. BASIS OF ESTABLISHED FESIBILITY STUDY Feasibiltiy Study (FS) for 500kV Pho Noi substation and connecting branches project is established based on the following basis: Master Plan of Power Sector Development of Vietnam No. VI. Plan of power network improvement and development of Hung Yen province, period of 2006-2010 perspective to 2015. Correspondence to No. 6195/CV-EVN-KH dated 21/11/2007 of Viet Nam Electricity about “Assigning establish feasibility study for 500kV Pho Noi substation and connecting branches project”. Correspondence to No. 653/UBND-KTTH dated 29/04/2008 of Hung Yen province people’s committee about “Agree local construction for 500kV Pho Noi substation and connecting branches project”. Contract between Northern Power Project Management Board and Power Engineering Consulting Joint Stock Company 4. 1.2. OBJECTIVES OF PROJECT Investment of 500kV Pho Noi substation and connecting branches project aims to: Connecting and transmitting power capacity from Hai Phong 3 Thermal Power Complex aim to load demand of Nothern region in general and national. Create a ring circuit connection of 500kV Pho Noi – Dong Anh – Hiep Hoa, aim to load demand of Ha Noi center. Increase realibity and safety of power supply and power quality to power grid of Nothern region in general and national.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 2 : NECESSITY OF PROJECT INVESTMENT

To explain the necessity and the construction time of 500kV Pho Noi substation, the project shall be analysed by focusing on 2 factors: The facilitation for the connection and power transmission between Hai Phong 3 Thermal Power Complex and The National Power System. The guarantee of continuous power supply and safe operation in all cases of the system for the load demand of Hung Yen province and neighboring provinces. To find the most reasonable way of connecting Hai Phong 3 Thermal Power Complex into the National Power System, this project shall focus on: Power balance, load balance in Ha Noi and neighboring provinces including Ha Tay, Ha Nam, Hung Yen, Hai Duong, Bac Ninh, Vinh Phuc and Phu Tho. The study of current status and expected development of electricity transmission grid in the project area to propose the connection plan. 2.1. POWER BALANCE AND LOAD BALANCE IN THE AREA

Table 2.1: Power balance, load balance in Ha Noi and neighboring provinces

No. Description Year 2010 Year 2015 Year 2020 1 Total power in the area (MW) 3.220 3.220 4.420 2 Total power load (MW) 3.937 7.809 12.749 3 Balance, residual (+), insufficient (-) -717 -4.589 -8.392 Source: Plan for connecting all thermoelectric plants in the whole country to the National Power System.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

North-Eastern

-G: 9400MW -D: 3500MW -Balanced:+5900MW

5900MW North-Western 3800MW Ha Noi and neighboring

-G: 3200MW -G: 6000MW -D: 7800MW -D: 2200MW -Balanced:-4600MW -Balanced:+3800MW 3500MW Southern Ha Noi North of Central

-G: 600MW -D: 1400MW -G: 6200MW -Balanced: -800MW -D: 2700MW -Balanced: +3500MW

Figure 2.1: Power and load balancing in the North area in 2015

North-Eastern

-G: 9300MW -D: 6200MW -Balanced: +3100MW

3100MW North-Western 3500MW Ha Noi and neighboring

-G: 7200MW -G: 4400MW -D: 3700MW -D: 1270MW -Balanced: +3500MW -Balanced: -8300MW

Southern Ha Noi North of Central 5800MW -G: 2800MW -G: 10400MW -D: 2400MW -D: 4600MW -Balanced: -400MW -Balanced: +5800MW

Figure 2.2: Power and load balancing in the North area in 2020

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report 2.2. ALTERNATIVES FOR CONNECTING HAI PHONG 3 THERMAL POWER COMPLEX TO THE NATIONAL POWER SYSTEM 2.2.1 Connection Alternatives: Hai Phong 3 Thermal power complex is proposed to be put in operation in stage 2014 - 2015 with the following power capacity and operating schedule: Table 2.2: Operating schedule of Hai Phong 3 Thermal power complex

Power Capacity Operating No. Generator (MW) year 1 Generator 1 and 2 1200 2014 2 Generator 3 and 4 1200 2015

With the main purpose of Hai Phong 3 Thermal Power Complex power transmission which supplies the load demand in Ha Noi and neighboring provinces, this project shall consider 2 connection alternatives as below: Alternative 1: Build Pho Noi 500kV substation at Van Lam district, Hung Yen province and the substation shall be connected to the existing Quang Ninh – Thuong Tin 500kV transmission line.

THAI NGUYEN SON LA HIEP HOA VIET TRI BAC GIANG

VINH YEN NĐ THĂNG LONG DONG ANH BAC NINH NĐ MÔNG DƯƠNG 2200MW TĐ TICH NANG HOAI ĐUC 1200MW NĐ QUẢNG NINH 1200MW THUONG TIN PHO NOI NĐ HẢI PHÒNG III 2400MW NĐ HẢI PHÒNG I, II 1200MW HOA BINH THAI BINH

NĐ THAI BINH 1800MW

NHO QUAN

: substation in operating stage up to 2010

THANH HOA : substation in operating up to 2015 : substation in operating up to 2020

: line in operating stage up to 2010 : line in operating stage up to 2015 : line in operating stage up to 2020 Figure 2.3: 500kV power network in the North area until 2020 - Alternative 1 To execute plan 1, it is necessary to completely build 500kV power network until 2020 as below:

- Build Pho Noi 500kV substation: 2x600MVA. - Build 500kV transmission line, double circuits, approximate 1.34km in 6

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report length which shall connect Pho Noi 500kV substation to Quang Ninh – Thuong Tin 500kV transmission line by conductor 4xACSR330. - Build 500kV transmission line, approximate 58km in length which shall connect Hai Phong 3 Thermal power complex to Pho Noi 500kV substation. - Build 500kV transmission line, approximate 60km in length which shall connect Thai Binh 500kV substation to Pho Noi 500kV substation. - Build 500kV transmission line, approximate 35km in length which shall connect Dong Anh 500kV substation to Pho Noi 500kV substation. Alternative 2: Hai Phong 3 Thermal power complex shall be connected to Thuong Tin 500kV substation.

THÁI NGUYÊN SƠN LA HIỆP HOÀ VIỆT TRÌ BẮC GIANG

VĨNH YÊN NĐ THĂNG LONG ĐÔNG ANH BẮC NINH NĐ MÔNG DƯƠNG 2200MW TĐ TÍCH NĂNG HOÀI ĐỨC 1200MW NĐ QUẢNG NINH 1200MW THƯỜNG TÍN NĐ HẢI PHÒNG III 2400MW NĐ HẢI PHÒNG I, II 1200MW HOÀ BÌNH THÁI BÌNH

NĐ THÁI BÌNH 1800MW

NHO QUAN

: substation in operating stage up to 2010

THANH HOÁ : substation in operating stage up to 2015

: substation in operating stage up to 2020 : line in operating stage up to 2010 : line in operating stage up to 2015 : line in operating stage up to 2020

Figure 2.4: 500kV power network in the North area until 2020 - Alternative 2 To execute alternative 2, it is necessary to completely build 500kV power network until 2020 as below: - Install 900MVA transformer at 500kV Thuong Tin substation. - Build 500kV transmission line, approximate 80km in length which shall connect Hai Phong 3 Thermal power complex to Thuong Tin 500kV substation. - Build 500kV transmission line, approximate 72km in length which shall connect Thai Binh 500kV substation to Thuong Tin 500kV substation. - Build 500kV transmission line, approximate 45km in length which shall connect Dong Anh 500kV substation to Thuong Tin 500kV substation.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report - 2.2.2 Calculate power distribution and define power loss of electricity grid Table 2.3: Power loss of entire system of alternatives

Power Loss (MW) No. Alternative Year 2015 Year 2020

1 Alternative 1 (PA1) 837 1696

2 Alternative 2 (PA2) 852 1741

(PA2 - PA1) 15 45

719.8-j224 522.5kV 8x(90+j10.9

Sôn La Lai Chaâu Huoäi Quaûng 728+j137.3 10x(140+j113.9 300-j240 521.8kV 788.6+j235.7 335+j321 Pitoong -67.1+j138.7 493.3kV

139.4+j50.1 225.5kV 950.2+j501.8 245.9+j72.0 Baéc Ninh NÑ. QNinh NÑ.MDöông 3x(250+j61.7

2236.6+j759.6 511.6kV

51.2-j137.7 518.1kV

490.8kV 497.4kV 231.3kV 1599.4+j288.6 713.6+j460.2

504.5kV

739.2-j9.9 441.8-j13.5

Naâm Chieán 515.2kV Vieät Trì 600+j17.3 2x(400+j97.5

-118.9+j69.1 2x(400+j97.5

945+j618.6 218.0kV Ñoâng Anh NÑ Th.Long

1406.8+j435.2 -284.8+j78.5 905.2+j201.8 222.5kV 684+j529.4 Q.Ninh Hoaøi Ñöùc 224.6kV Hieäp Hoaø 228.0kV 1199.4+j605 519.9kV Hoaø Bình 248.5-j235.3 224.8kV 223.4kV 496.9kV 973.1+j444.8

285.4-j377 217.5kV Nho Quan 2x(600+j360.0

225.6kV 508.4kV NÑ.Haûi Phoøng 3 725+j445.4 511.2kV Thöôøng Tín 524.8kV -234.4+j332.3 1161.2+j517.8 506.5kV Phoá Noái

536+j95.2 768.2+j128 -1106.3+j110.8 221.3kV

627.2+j231.4

507.4kV 413.8+j498.6 -63.6-j20.1 -515.8+j172.7 394+j413.3

517.2kV

235.2kV 522.0kV 920.4+j171.6 230.6kV Haø Tónh Thanh Hoaù 343-j94.4 NÑ. Nghi Sôn 230.0kV

518.2kV 1633.8-j139.6 2x(600+j69.9 Heä thoáng ñieän 500kV Mieàn Baéc naêm 2015 258.9-j109.7 Cheá ñoä phuï taûi cöïc ñaïi Phöông aùn 1 231.2kV 600+j123.2 Töø Vuõng AÙng 3 Pmax: 42240MW Vuõng AÙng 1, 2 Losses: 837MW

-93.2+j478 2x(600+j123.2 Ñi Ñaø Naüng Figure 2.5: Load flow of 500kV power network in the North area in 2015 - Alternative 1

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

719.8-j214.4 522.2kV 8x(90+j12.1

Sôn La Lai Chaâu Huoäi Quaûng 763.7+j156.0 10x(140+j116.7 300-j231.8 521.0kV 843.3+j261.9 438.4+j379.2 Pitoong -28.6+j147.9 490.4kV

74.2+j49.9 225.1kV 890.4+j468.2 247.8+j73.6 Baéc Ninh NÑ. QNinh NÑ.MDöông 3x(250+j63.2 2301.4+j802 510.6kV

24.6-j141.2 490.2kV 517.2kV 494.9kV 229.5kV 805.6+j480 1599.4+j333

503.1kV 376.3-j12.7

Naâm Chieán 2x(400+j108.9 514.0kV Vieät Trì 674.1-j4.8 600+j22.1

-158.9+j72.8 2x(400+j108.9 885.8+j590 218.0kV 1484+j457 Ñoâng Anh NÑ Th.Long 923.2+j211.6 221.6kV 770.5+j555.7 -262.6+j108.6 Q.Ninh Hoaøi Ñöùc 223.2kV Hieäp Hoaø 226.1kV 1199.6+j573.6 524.5kV Hoaø Bình 288.8-j233.4 224.4kV 223.4kV 494.1kV 1037.9+j447.8

256.6-j386.2 Nho Quan 2x(600+j342.1

225.7kV NÑ.Haûi Phoøng 3 723+j437.6 510.8kV 524.6kV -232.1+j338.0 505.8kV

512.8+j112.6

-1115.8+j111.3 Thöôøng Tín 1707.6+j683.8 219.1kV 507.1kV 413.6+j498 -67.4-j18.9 -519.2+j168.6 394.1+j411.2

517.0kV

235.1kV 521.8kV 924+j174.7 230.5kV Haø Tónh Thanh Hoaù 343.2-j94.2 NÑ. Nghi Sôn 230.0kV

518.1kV 1647.6-j136.6 2x(600+j72.2 Heä thoáng ñieän 500kV Mieàn Baéc naêm 2015 259.6-j109.4 Cheá ñoä phuï taûi cöïc ñaïi Phöông aùn 2 231.2kV 600+j125.2 Töø Vuõng AÙng 3 Pmax: 42240MW Vuõng AÙng 1, 2 Losses: 852.3MW

-107.8+j480.6 2x(600+j125.2 Ñi Ñaø Naüng Figure 2.6: Load flow of 500kV power network in the North area in 2015 – Alternative 2

1198.8-j460 511.6kV 5x(240-j80 217.8kV 1884.4+j370.6

Lai Chaâu Vónh Yeân 575+j121.8 Sôn La 500.6kV 2x(500+j101.7 501.2kV 2x(600+j107.2 623.2+j111.8 2199.8+j287.8 10x(220+j64.9 646.4+j322 Baéc Giang 520.9kV Tr.Quoác 492.3kV NÑ.MDöông 520.1kV

1258.6+j104.8 488.5+j11.2

Pitoong NÑ. QNinh 623.8+j55.8

Thaùi Nguyeân 220.5kV 633.8+j133.7 3x(300+j113.0 1500+j300 502.4kV 800.2+j277.6

-34.8+j6.5 228.8kV

1654.8+j529.8 645+j397.5 224.5kV 1731.6-j25 337.6-j29.6 497.5kV 497.4kV 517.0kV 278.5+j137.3

623+j248.6 213.8kV 516.0kV 514.7kV Naâm Chieán Baéc Ninh

Hoaøi Ñöùc Q.Ninh

553.6-j26.1 799+j327.2 408.8-j29.8 Ñoâng Anh 238-j305.6 1551.4+j195 1294.6+j341.4 600+j339.5 222.1kV 1134.5+j397.7 4x(300+j153.8 223.4kV 217.1kV 936.9+j343.2 NÑ Th.Long TÑ Tích Naêng Hieäp Hoaø 224.2kV 219.3kV 496.1kV 1020.2+j196.6 1199.8+j622.2 514.4kV 498.7kV 626.8+j299.4 215.5kV Hoaø Bình Nho Quan Vieät Trì 502.2kV 2x(600+j360.0 894.8+j473.4 500.4kV Thöôøng Tín 219.6kV NÑ.Haûi Phoøng 3

505.2kV 1232.6+j615.8 230.4kV

1679.2+j326.2 498.4kV 498.2+j76.5 Phoá Noái

1331-j91 1405.4+j450.2 220.3kV 752.7-j143.2 356.6+j243.2 451.4-j126.4

180-j136.5 28.8-j465.8 316.6+j265.0 511.2kV 777.1+j139.2 495.5kV 509.4kV 234.3kV 602.2+j16.6 230.8kV Haø Tónh 475.4-j52.2 NÑ. Nghi Sôn Thaùi Bình

2x(600+j86.4 498.5kV 443.8+j517.8 514.7kV 227.1kV 1575.4+j78.8 354.4+j548.8 Thanh Hoaù

231.7kV Heä thoáng ñieän 500kV Mieàn Baéc naêm 2020 926+j433.6 Vuõng AÙng 1, 2 Cheá ñoä phuï taûi cöïc ñaïi 231.5kV Phöông aùn 1

489.6-j452.4 2x(500-j79.6 1420.8+j374.4 Pmax: 70587MW 1117.4-j57.9 Ñi Ñaø Naüng Losses: 1696MW Ñi Vuõng AÙn 3 Figure 2.7: Load flow of 500kV power network in the North area in 2020 – Alternative 1

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

1198.8-j460 511.6kV 5x(240-j80 216.1kV 2105+j505

Lai Chaâu Vónh Yeân 499.2+j73.4 Sôn La 496.1kV 2x(500+j110.8 498.7kV 2x(600+j116.4 664.8+j132.1 2199.8+j323.6 10x(220+j64.5 694.6+j336 Baéc Giang 521.0kV Tr.Quoác 488.3kV NÑ.MDöông 1278.6+j127.4 591+j41.8 519.6kV

Pitoong NÑ. QNinh 665.6+j77.8

Thaùi Nguyeân 217.8kV 461.2+j47.4 3x(300+j114.0 1500+j300 500.1kV 988.6+j371.2

-28.3+j6.1 228.8kV 1678.6+j627.2

693.1+j408.0 222.3kV

1776.4+j24.2 163.9-j85.9 493.8kV 492.0kV 516.3kV -70.6-j32.2 517.5kV 600.7+j241.9 213.0kV 513.2kV Naâm Chieán Baéc Ninh

Hoaøi Ñöùc Hieäp Hoaø Q.Ninh

530.9-j50.1 364-j260

390.4-j21.6 1758+j307 Ñoâng Anh 986.8+j412.4 223.1kV 921.4+j183.8 600+j284.4 1105.9+j368.8 4x(300+j175.1 219.2kV 214.1kV 763.7+j238.7 TÑ Tích Naêng NÑ Th.Long

224.3kV 213.4kV 494.0kV 996.4+j206.3 1199.8+j621.8 513.0kV 495.1kV 634.8+j319.2 Hoaø Bình Nho Quan Vieät Trì 2x(600+j360.0 930.8+j513.4 502.8kV 219.5kV 506.2kV 1274+j693.4 230.7kV NÑ.Haûi Phoøng 3 500.7kV 462+j32.9

1216.4-j79.8

661.6-j132.5 Thöôøng Tín 2613+j663.9

517.5-j55.1 215.1kV

115.8-j260.1 -8.6-j420.4 340+j290.1 526.4kV 715.5+j346.7 494.7kV 512.8kV 234.7kV 599.4+j37.6 231.1kV Haø Tónh 529+j17.7 NÑ. Nghi Sôn Thaùi Bình

2x(600+j265.7 503.1kV 534.1+j535.0 516.4kV 226.4kV 1465.6-j1.4 263.2+j510.1 Thanh Hoaù

228.8kV Heä thoáng ñieän 500kV Mieàn Baéc naêm 2020 961+j409.6 Vuõng AÙng 1, 2 Cheá ñoä phuï taûi cöïc ñaïi 230.9kV Phöông aùn 2

467.8-j433.4 2x(500-j111.6 1197.6+j336.6 Pmax: 70587MW 1349.1-j155.4 Ñi Ñaø Naüng Losses: 1741MW Ñi Vuõng AÙn 3 Figure 2.8: Load flow of 500kV power network in the North area in 2020 – Alternative 2 Table 2.4: Cases of calculation at maximum load in 2015

Power loss Power load 220kV Transmission Line Load of VN No Case in line or or 500kV Substation percentage power transformer system. A Alternative 1 Thuong Tin - Mai Dong (1 249+j76.5 72% circuit) Mai Dong - An Duong (1 91.5+j6.7 25% circuit)

1 In normal case Thuong Tin - Van Dien (1 119+j87 41% 837 MW ciruit) Thuong Tin - Pho Noi 12-j11.1 6% Pho Noi 500kV substation 768+j128 65% Thuong Tin 500kV substation 1,161+j517 94% B Alternative 2 Thuong Tin - Mai Dong (1 87% 297+j104.5 circuit) Mai Đong - An Duong (1 139.5+j70.3 43% circuit) 1 In normal case Thuong Tin – Van Đien (1 172+j107.9 852.3MW 69% circuit) Thuong Tin - Pho Noi 193-j5.3 65% Thuong Tin 500kV substation 1,707+j683 136% * (*) : Thuong Tin 500kV substation with power at (450+900)MVA (as Master Plan VI) 10

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

Table 2.5: Cases of calculation at maximum load in 2020

Power loss Power load 220kV Transmission Line or Load of VN No Case in line or 500kV Substation percentage power transformer system. A Alternative 1 Thuong Tin – Mai Dong (1 circuit) 329+j75,5 88% Mai Đong - An Duong (1 circuit) 148+j16,7 41% Thuong Tin - Van Đien (1 circuit) 119+j87 41% In normal 1 Thuong Tin – Pho Noi 250+j121 91% 1,696 MW case Pho Noi 500kV substation (1 702+j225 82% transformer) Thuong Tin 500kV substation (1 839+j163 95% transformer)* B Alternative 2 Thuong Tin - Mai Dong (1 circuit) 335+j78 95% Mai Dong - An Duong (1 circuit) 173+j17.6 48% In normal Thuong Tin - Van Đien (1 circuit) 281+j117 84% 1 1,741MW case Thuong Tin - Pho Noi 270+j17.7 92% Thuong Tin 500kV substation 871+j221 99% (1 transformer)* (*) : Thuong Tin 500kV substation with capacity in: Alternative 1 - 2x900MVA, Alternative 2 - 3x900MVA The result of table 2.4 shows that it is necessary to replace two 450MVA transformers with two new 900MVA transformer if without building Pho Noi 500kV substation until 2015 (only replace 1 transformer in master plan VI).

2.2.3 Economical analysis for each alternative: Table 2.6: Volume and investment cost in alternative 1

Cross Unit Amount No Item Unit section, Volume Price 9 capacity (10 VND)

A Transmission Line

500kV connecting branch, double circuit put 1 into Thang Long Thermal power complex – km 4xAC330 1.34 12.69 17.01 Thuong Tin 500kV transmission line

Hai Phong 3 Thermal power complex - Pho 2 km 4xAC330 58 12.69 736.02 Noi 500kV transmision line, double circuit.

Thai Binh - Pho Noi 500kV transmision line, 3 km 4xAC330 60 12.69 761.4 double circuit. 11

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

Dong Anh - Pho Noi 500kV transmision line, 4 km 4xAC330 35 12.69 444.15 double circuit. Pho Noi - Gia Loc 220kV transmission line, 5 km AC500 18 6.5 117 doulbe circuit. Pho Noi - Yen My 220kV transmission line, 6 km AC500 10 6.5 65 doulbe circuit.

B Substation

Pho Noi 500kV substation (including 500kV 1 s/s 2x600MVA 1 1,222.94 feeders và 220kV connecting branches) Total 3,363.52

Table 2.7: Volume and investment cost in alternative 2

Cross Unit Amount No Item Unit section, Volume Price 9 Capacity (10 VND) A Transmission Line Hai Phong 3 Thermal power complex - 1 Thuong Tin 500kV transmission line, km 4xAC330 80 12.69 1,015.2 doulbe circuit.

Thai Binh - Thuong Tin 500kV 2 km 4xAC330 72 12.69 913.68 transmission line, doulbe circuit.

Dong Anh - Thuong Tin 500kV 3 km 4xAC330 45 12.69 571.05 transmission line, doulbe circuit. Pho Noi - Gia Loc 220kV transmission 4 km AC500 22 6.5 143 line, doulbe circuit. Pho Noi - Yen My 220kV transmission 5 km AC500 12 6.5 78 line, doulbe circuit. B Substation and feeder Enhance power capacity of 500kV Thuong 2x900MVA* 1 s/s 1 282 Tin substation 2 500kV feeders feeder 7 62.5 437.5 Total 3,440.43 (*): Replace two 450 MVA transformers with two new 900MVA transformers at Thuong Tin 500kV substation in 2015.` By compairing the volume and investment cost of alternative 1 with that of alternative 2, the total investment cost of alternative 1 is 76.91 billion VND lower.

2.2.4 Select reasonable alternative: Through above calculation, the technical specification of alternative 1 is better and the total investment cost is lower than that of alternative 2. Alternative 1 takes advantages of the implementation of connecting 500kV transmission lines to big Thermal power complexes, of extensible ability for simple substation, of safe operation and long time planning until 2020.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report With above analysis, plan 1 should be recommended for connecting Hai Phong 3 Thermal power complex to the National Power system and it is necessary to build Pho Noi 500kV substaion in this alternative. Besides the convenient connection, the other missions of Pho Noi 500kV substation is to distribute power and supply power for load demand in the area. Pho Noi 500kV substation can be completely built before Hai Phong 3 Thermal power complex shall be put into operation. To select the suitable time of building Pho Noi 500kV substation, it is necessary to analyse, calculate load flow in 2012 and 2013. - In 2012: Without Pho Noi 500kV substation, the voltage quality at 220kV busbar of

substation in the North area shall be in range ±5%Urated and the lowest one is of An Duong 220kV substation (216.9kV), Bac Ninh 2 (217.9kV); the total power loss of North power system is 126MW (500kV and 220kV power network). - In 2013: Without Pho Noi 500kV substation, the voltage quality at 220kV busbar of the subsations connected after 500kV Thuong Tin such as Pho Noi (205.8kV), Hai Duong

(205.1kV), Bac Ninh 2 (205kV) will exceed -5%Urated, the total power loss of the North electricity system is 256MW (500kV and 220kV power network). If install two 600MVA transformers at Pho Noi 500kV substation, the voltage quality becomes better (219.4kV, the lowest voltage is of 220kV bus bar at Hai Duong 220kV substation) and the total power loss of the North power system is 233MW (23MW lower) - With above mentioned analysis, Pho Noi 500kV substation should be equipped with two new 600MVA transformers and be put into operation in 2013. As above mentioned selection, the project shall be considered connecting Pho Noi 500kV substation to the National Power System in 2 following cases. Case 1: Pho Noi 500kV substation shall be connected to one existing circuit of Quang Ninh – Thuong Tin 500kV transmission line (or Thang Long Thermal Power Complex – Thuong Tin 500kV transmission line).

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

719.8-j224.2 522.6kV 8x(90+j10.9

Sôn La Lai Chaâu Huoäi Quaûng 729.7+j135.5 10x(140+j113.8 300-j240.2 521.8kV 789.9+j234.1 343.4+j320.2 Pitoong -68.4+j140.0 493.2kV

948.4+j501.2 147.6+j46.5

246+j72.0 225.5kV Baéc Ninh NÑ. QNinh

NÑ.MDöông 3x(250+j61.9 2243.6+j758.6 49-j137.7 511.5kV 518.0kV

490.8kV 497.4kV 231.3kV 1599.4+j293.8 713.6+j459.6

504.5kV

430.4-j0.5 747.4-j13.5

Naâm Chieán 515.1kV Vieät Trì 600+j17.5 2x(400+j98.8

-123.8+j69.2 2x(400+j98.8

943.2+j618.2 218.0kV Ñoâng Anh

1405.4+j435 NÑ Th.Long -271.9+j74.3 905.4+j201.8 222.5kV 681.9+j529.5 Hoaøi Ñöùc 224.6kV Q.Ninh Hieäp Hoaø 228.0kV 1199.4+j605 520.0kV Hoaø Bình 248.6-j235.8 224.8kV 223.4kV 497.0kV 957.9+j447.8

286.2-j376.8 217.6kV Nho Quan 2x(600+j360.0

225.6kV 508.5kV NÑ.Haûi Phoøng 3 726.4+j446 511.3kV Thöôøng Tín 524.9kV

-237.2+j332.1 1168+j520.2 506.6kV Phoá Noái

525.8+j92.8 764.2+j128 -1105.8+j111.4 221.3kV

215.7+j119.8

507.5kV 414+j498.6 -63.5-j20.2 -515.3+j173.4 394.4+j413.4

517.3kV

235.2kV 522.0kV 920.2+j170.9 230.6kV Haø Tónh Thanh Hoaù 343.2-j94.6 NÑ. Nghi Sôn 230.0kV

518.2kV 1633-j140.2 2x(600+j69.4 Heä thoáng ñieän 500kV Mieàn Baéc naêm 2015 258.9-j109.7 Cheá ñoä phuï taûi cöïc ñaïi Phöông aùn 1-Tröôøng hôïp 1 231.2kV 600+j122.9 Töø Vuõng AÙng 3 Pmax: 42240MW Vuõng AÙng 1, 2 Losses: 836MW

-92.6+j478 2x(600+j122.9 Ñi Ñaø Naüng Figure 2.9: Load flow of 500kV power network in the North area in 2015 - Case 1

1198.8-j460 511.6kV 5x(240-j80 217.7kV 1937.4+j386.8

Lai Chaâu Vónh Yeân 617.2+j124.8 Sôn La 500.3kV 2x(500+j99.1 501.1kV 2x(600+j104.7 626.5+j113.3 2199.8+j277.8 10x(220+j65.0 645.2+j321.2 Baéc Giang 520.9kV Tr.Quoác 492.0kV NÑ.MDöông 520.3kV

1257.6+j105.2 491.9+j11.6

Pitoong NÑ. QNinh 627.2+j57.4

Thaùi Nguyeân 220.4kV 502.5+j95.6 3x(300+j112.7 1500+j300 502.3kV 806.6+j278.8

-33.5+j7.0 228.8kV 1669.4+j535.6

643.9+j396.6 224.4kV 1745.4-j21.6 405.9-j19.6 497.2kV 497.1kV 517.2kV 343+j144.0 515.8kV 618.6+j247.3 213.8kV 514.6kV Naâm Chieán Baéc Ninh Q.Ninh 547-j27.6 Hoaøi Ñöùc

426.2-j25.6 Ñoâng Anh 248.2-j304 805.4+j328.2 1547.2+j193.8 1280.8+j337.4 600+j349.4 222.1kV 1125.9+j395.5 4x(300+j155.3 223.2kV 217.0kV 1004.9+j359.6 NÑ Th.Long TÑ Tích Naêng Hieäp Hoaø 224.2kV 219.1kV 495.6kV 941.5+j179.9 1199.8+j622 513.6kV 498.4kV 629.2+j300.8 215.6kV Hoaø Bình Nho Quan 501.3kV 2x(600+j360.0 Vieät Trì 904+j477 500.6kV Thöôøng Tín 219.6kV NÑ.Haûi Phoøng 3

505.3kV 1229.8+j614.8 230.3kV

1727+j342.6 498.9kV 487.3+j74.1 Phoá Noái

1275.6-j102 1367.6+j436.6 220.1kV 748.7-j144.7 -39.1+j85.3 426-j133.2

182.1-j136.2 78.2-j454.4 316.9+j265.2 511.2kV 779.1+j139.9 494.9kV 509.4kV 234.3kV 602.2+j16.6 230.8kV Haø Tónh 506.3-j44.9 NÑ. Nghi Sôn Thaùi Bình

2x(600+j86.6 498.5kV 424.9+j508.8 514.7kV 227.1kV 1574+j77.8 354.4+j548.8 Thanh Hoaù 231.7kV Heä thoáng ñieän 500kV Mieàn Baéc naêm 2020 Vuõng AÙng 1, 2 925.4+j433.2 Cheá ñoä phuï taûi cöïc ñaïi 231.4kV Phöông aùn 1-Tröôøng hôïp 1

488.4-j452.4 2x(500-j79.7 1418+j373.6 Pmax: 70587MW 1120.5-j57.2 Ñi Ñaø Naüng Losses: 1697MW Ñi Vuõng AÙn 3 Figure 2.10: Load flow of 500kV power network in the North area in 2020 – Case 1

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

Case 2: Pho Noi 500kV substation shall be connected to 2 existing circuits of Quang Ninh – Thuong Tin 500kV transmission line (the result of calculation is shown in figure 2.5 and 2.7) In case 1, because Pho Noi 500kV substation was directly powered by Hai Phong 3 and Thang Long Thermal Power Complex, voltage quality and operation are ensured in case of normal operation as well as fault. Otherwise, because Pho Noi 500kV substation shall be equipped with two 600MVA transformers, the majority of power thermal power complexes shall be transmitted to transformers and reduce power transmission capacity on Pho Noi - Thuong Tin 500kV transmission line as well as Quang Ninh –Thuong Tin 500kV transmission line. Therefore, if one of the transmission lines may disconnect with Pho Noi 500kV substation, the rest transmission lines can ensure power transmission in limit. Power loss of entire system in case 1 is more than of in case 2 but this amount is small (0.5MW in 2015 and 1MW in 2020). In terms of economic, total investment cost in building substation in case 1 is smaller than in case 2. Therefore, the quantity of 500kV transmission lines connected to Pho Noi 500KV substation as well as compensating equipments in case 1 is less than in case 2. Based on technical specification and economic factor, alternative 1 should be delected and case 1 is recommended for plan connecting 500KV Pho Noi substation to the system. This alternative shall be: - Invest in building Pho Noi 500kV substation, install two 600MVA transformers and put into operation in 2013. - Connect Pho Noi 500kV substation to one existing circuit of Thang Long- Thuong Tin 500kV transmission line. - To facilitate for connecting Bac Ninh 2 220kV substation into the system (in 2012), the 220kV distribution system of 500kV Pho Noi substation should be constructed in advance.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report

CHAPTER 3 : SELECTING SUBSTATION CONTRUCTION LOCATION

3.1. LOCATION ALTERNATIVES Alternative 1 : 500/220kV Pho Noi substation is located on the paddy field area belongs to Dong Chung and Sam Khuc Hamlet, Viet Hung Commune, Van Lam District, Hung Yen Province. Alternative 2 : 500/220kV Pho Noi substation is located on the paddy field area belongs to Nhuan Trach Hamlet, Duong Quang Commune, My Hao District, Hung Yen Province. Via analysis on technical and economic indicators of two alternatives, the alternative 1 is proposed to be selected for construction of 500/220kV Pho Noi substation. The alternative 1 is agreed by Hung Yen Provincial People’s Committee.

3.2. DESCRIPTION ON PROJECT CONSTRUCTION SITE

3.2.1. Geographical location The 500/220kV Pho Noi substation is located on the paddy field area belongs to Dong Chung and Sam Khuc Hamlet, Viet Hung Commune, Van Lam District, Hung Yen Province, with geographical location as follows: - North : boundary with the paddy field belongs to Sam Khuc Hamlet. - South : boundary with the paddy field belongs to Dong Chung Hamlet. - East : boundary with Bac Ninh Province. - West : boundary with the paddy field belongs to Dong Chung Hamlet.

3.2.2. Topography The topography in the location of substation contruction is even.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 4 : MAIN TECHNOLOGICAL SOLUTIONS

4.1. VOLTAGE LEVEL Voltage level: 500kV, 220kV, 110kV and 35kV. 4.2. SUBSTATION CAPACITY Capacity: install 02 transformers 500/220/35kV - 600MVA and 01 transformer 220/110/22kV – 125MVA. 4.3. SINGLE LINE CONNECTION DIAGRAM - At 500kV side: using the single line connection diagram “3/2”, including: 02 transformer bays, 3 transmission lines bays and 7 spare bays. - At 220kV side: using the single line connection diagram “Two busbar systems with coupling breaker”, including: 03 transformer bays, 01 coupling breaker bay, 6 transmission lines bays and 7 spare bays. - At 110kV side: using the connection diagram “Two busbar systems with coupling breaker”, including 01 transformer bay and 10 spare bays. - At 35&22kV side: Design in accordance with transformer block diagram 4.4. SOLUTIONS APPLIED FOR CONTROL, PROTECTION SYSTEM 4.4.1. Control system Using computerized control system for the substation. The computerized control mode shall have structure of 4 levels: - Level 1 : Controlling and monitoring from load dispatch center. - Level 2 : Controlling from control room of substation. - Level 3 : Controlling from control-protection cubicles of incoming bays. - Level 4 : Controlling at equipment. 4.4.2. Protection system The protection system for controlling elements inside substation shall be complied with regulation specified by Vietnam Electricity. The main relays of protection system shall be of digital relays with micro processors have interface with computerized control system and SCADA system. 4.5. AUXILIARY POWER SUPPLY 4.5.1. AC auxiliary power AC auxiliary power shall be supplied from 02 auxiliary transformers 35/0.4kV – 560kVA, receive power from equipotential winding of 02 transformers 500/220/35kV. 4.5.2. DC auxiliary power DC auxiliary power shall be supplied from 02 Nikel-Cadimi (NiCd) battery system with capacity of 300Ah, voltage level 220VDC. The battery system shall operate under regime of

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report regular recharge and surcharge via 02 rectifiers with input voltage of 380VAC, output voltage of 220VDC.

4.6. EARTHING, GROUNDING SYSTEMS The rod-wire combination earthing system is used within substation range. Using galvanized steel earthing rod with diameter Φ22, 5m length. The main earthing wire and radial earthing wires shall be of galvanized steel wires with diameter Φ14, electric welding shall be applied for connection between earthing rods and bars, earthing bars and bars. The resistivity value of earthing system shall be in accordance with current prevailed norms. Earthing for equipment, equipment supports shall be of M120 copper wires, earthing wires and earthing grid shall be connected by cad-welding. The substation is protected from direct lightning striking by lightning rods installed on independent lighting poles-earthing, wires shall be installed on gantry towers of 500kV, 220kV, 110kV switcgear. Protection of over atmospheric voltage transmitted from the transmission lines to substation and local over voltage by surge arresters. 4.7. LIGHTING SYSTEM - The neon lamps 40W shall be used for control house lighting, incandescent lamps 75W shall be used for emergency lighting. - The 400W beacon lights installed on lighting poles – independent lightning protection poles shall be used for outdoor lighting. - The 70W bulb lamps installed on 3.4m height poles shall be used for lighting substation surrounding area. 4.8. COMPENSATING SOLUTION At 500kV Pho Noi substation: install 02 shunt reactors 500kV - 65MVAr (shall be moved from 500kV Thuong Tin and Quang Ninh substation). 4.9. SELECTING OF MAIN ELECTRICAL EQUIPMENT The main electrical equipment shall be selected with basic technical parameters as follows: 1/ Electrical equipment 500kV, outdoor installation: - Rated voltage : 550kV - Rated current : 2000A - Rated short circuit current withstands : 50kA/3sec - Testing voltage at power frequency 50Hz, 1min : 680kV - Impulse withstand testing voltage 1.2/50 s : 1550kV - Creepage distance : 25mm/kV - Auxiliary power : 380/220VAC, 220VDC 2/ Electrical equipment 220kV, outdoor installation: 18

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report - Rated voltage : 245kV - Rated current : 2000A (3150A) - Rated short circuit current withstands : 50kA/3sec - Testing voltage at power frequency 50Hz, 1min : 460kV - Impulse withstand testing voltage 1.2/50 s : 1050kV - Creepage distance : 25mm/kV - Auxiliary power : 380/220VAC, 220VDC 3/ Electrical equipment 35kV, outdoor installation: - Rated voltage : 38.5kV - Rated current : 800A - Rated short circuit withstand capacity : 40kA/1sec - Testing voltage at power frequency 50Hz, 1min : 70kV - Impulse withstand testing voltage 1.2/50 s : 170kV - Creepage distance : 25mm/kV - Auxiliary power : 380/220VAC, 220VDC

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 5 : MAIN SOLUTIONS APPLIED FOR CIVIL CONSTRUCTION PART 5.1. GENERAL PLAN LAYOUT AND FOUNDATION GRADING 5.1.1. General plan layout Land acquisition area for structures within substation general plan layout: - Acquistion land area for substation (1) : 124,730m2 - Acquistion land area for access road to substation (2) : 55,030m2 - Acquistion land area for operation shifting house (3) : 2,350m2 - Total acquisition land area for substation [(1)+(2)+(3)] : 182,110m2 5.1.2. Foundation grading Foundation grading: The substation construction location is located on the paddy field and crops planting areas, with inundation in flood and rainy season in accordance with flood level +3.35m (with frequence 2%). So, the substation foundation grading shall be done based on filling soil. + Total overburden removal quantity with 0.15m thickness : 26,595 m3 + Total soils excavation quantity : 13,254 m3 + Total soils embankment quantity : 288,206 m3 + Boulder stones masonry quantity : 9,643 m3 5.1.3. Road system The roads inside substation shall have structure of asphaltic concrete in 4m and 6m width. The roads outside substation shall have structure of asphaltic concrete in 7,5m width. 5.2. SOLUTIONS APPLIED FOR OUTDOOR STRUCTURES 5.2.1. Towers, steel arms and equipment supports: All of towers, steel arms shall be manufactured with figural galvanized steel lonked by bolts, hollow pyramid structure. The equipment supports shall be manufactured with galvanized I shape steel, fabricated and manuafactured at the factory. 5.2.2. Solutions applied for tower foundation, equipment support foundation, transformers foundation: The foundation of gantry towers, busbar towers shall be of reinforced concrete, cast in-place reinforced concrete single footing structure. The equipment support foundation shall be of reinforced concrete, cast in-place independent reinforced concrete single footing structure. The power transformer foundation shall be of cast in-place reinforced concrete, raft foundation, upper part having points for jacking and positioning transformers. 5.2.3. Solutions applied for cable trenches The cable trenches shall be of cast in-place reinforced concrete, underground

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report structure, with bottom slope to drain water to water drainage pipes, galvanized steel cable hanging frames shall be arranged inside cable trenches. The cable trenches cover slabs shall be of pre-cast reinforced concrete. 5.3. SOLUTIONS APPLIED FOR STRUCTURE OF CONTROL HOUSE, OPERATION SHIFT WORKING HOUSE 5.3.1. Solutions applied for control house Two storeys house, plan area (18x27)m, height to ceiling 4.55m. Principle force bearing structure shall be of reinforced concrete frame cast in one block, brick masonry walls, reinforced concrete tower foundation, masonry walls hewn stone founation. The reinforced concrete roof with slope to drain water to both sides, heat proof and anti-leakage corrugated steel sheets shall be covered on top. 5.3.2. Solutions applied for operation shift working house Two houses of one storey, plan area (9.5 x 18)m2, including 05 rooms. Force bearing structure shall be of reinforced concrete frame, masonry walls hewn stone foundation, masonry walls, ceramic bricks floor, heat proof and anti-leakage color steel sheets shall be covered on top. 5.4. SOLUTIONS APPLIED FOR WATER SUPPLY AND DRAINAGE, FIRE AND EXPLOSION PREVENTION AND FIGHTING 5.4.1. Water supply and drainage system The water source for daily life activities shall be supplied from 02 bored wells 70m depth. The water source for fire fighting shall be supplied from 02 bored wells 70m depth. The rain water shall be drained following to the slope direction of substation base, partial rain water shall be drained directly through the water draiange pipes at bottom of substation surrounding walls, remaining part of rain water shall be drained following to the slope of road pavement inside the substation to the catch pits arranged at edges of road pavement. The water in cable trenches shall be drained along the cable trenches to the water collecting pipes, then drained to the nearest catch pits. 5.4.2. Fire and explosion prevention and fighting system Fire fighting with water using solution: Two water tanks shall be arranged inside the substation for supplying water for fire fighting system, with capacity of each water tank of 130m3. The water tank structure shall be of reinforced concrete M200, self- overflowed surface structure. Fire fighting with sand using solution: The sand containers shall be of reinforced concrete with diameter 1m.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report Bored well: The bored wells shall have 70m depth, arranged inside substation. The regular water exploiting discharge shall be 1.875 liters/s, with sufficient volume for supplying water for daily life activities and fire fighting. Fire and explosion prevention and fighting system: The automatic fire fighting system shall be equipped. In addition, the fire fighting inside substation shall also be

equipped with the fire fighting drums such as foam, CO2 and other manual tools including ladders, buckets, shovels...

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 6 : SOLUTIONS APPLIED FOR CONNECTING BRANCHES 6.1. CONNECTING BRANCHES 500kV The 500kV connecting branches connected to Pho Noi 500kV substation shall cross through territory of Van Lam district, Hung Yen Province. Voltage level: 500kV. Number of circuits: 2 Starting point: shall be connected to the tower span 273 - 274 of existing Quang Ninh – Thuong Tin 500kV transmission lines. Ending point: At gantry tower 500kV of Pho Noi 500kV substation. Length: 1,230 m Conductors: 4xACSR-330/42. Grounding wires: Suspension of 01 optical composite grounding wire OPGW-80 and 01 grounding wire PHLOX-116. Insulators: glass or ceramic insulator or equivalent technical characteristics insulators in accordance with IEC standards. Tower: Using free standing figural galvainzed steel, linked by bolts. Foundation: Using cast in-place reinforced concrete foundation. Earthing: Using radial type earthing system. The resistivity value of earthing system shall be in accordance with current prevailed norms. Vibration damper: The vibration dampers shall be used for conductor, grounding wires and optical cables. 6.2. CONNECTING BRANCHES 220kV 6.2.1 Connecting branches No.1: The 220kV connecting branches connected to Pho Noi 500kV substation shall cross through territory of Van Lam district, Hung Yen Province; Thuan Thanh district, Bac Ninh Province; Cam Giang district, Hai Duong Province;. Voltage level: 220kV. Number of circuits: 4 (install 02 circuits in this stage) Starting point: shall be connected to the tower span 68 - 69 of existing Pha Lai – Pho Noi – Thuong Tin 220kV transmission lines. Ending point: At gantry tower 220kV of Pho Noi 500kV substation. Length: 5,107 m Conductors: ACSR-400/51. Grounding wires: Suspension of 01 optical composite grounding wire OPGW-70 and 02 grounding wire GSW-70. Insulators: glass or ceramic insulator or equivalent technical characteristics insulators in accordance with IEC standards. Tower: Using free standing figural galvainzed steel, linked by bolts. Foundation: Using cast in-place reinforced concrete foundation. Earthing: Using radial type earthing system. The resistivity value of earthing system shall be in accordance with current prevailed norms. 23

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report Vibration damper: The vibration dampers shall be used for conductor, grounding wires and optical cables. 6.2.2 Connecting branches No.2: The 220kV connecting branches connected to Pho Noi 500kV substation shall cross through territory of Ngoc Lien Commune, Cam Giang District, Hai Duong Province; Luong Tai and Viet Hung Commune, Van Lam District, Hung Yen Province. Voltage level: 220kV. Number of circuits: 4 (install 02 circuits in this stage) Starting point: shall be connected to the tower span 73 - 74 of existing Pha Lai – Pho Noi – Thuong Tin 220kV transmission lines. Ending point: At gantry tower 220kV of Pho Noi 500kV substation. Length: 4,578 m Conductors: ACSR-400/51. Grounding wires: Suspension of 01 optical composite grounding wire OPGW-70 and 02 grounding wire GSW-70. Insulators: glass or ceramic insulator or equivalent technical characteristics insulators in accordance with IEC standards. Tower: Using free standing figural galvainzed steel, linked by bolts. Foundation: Using cast in-place reinforced concrete foundation. Earthing: Using radial type earthing system. The resistivity value of earthing system shall be in accordance with current prevailed norms. Vibration damper: The vibration dampers shall be used for conductor, grounding wires and optical cables.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 7 : SOLUTIONS APPLIED FOR SUBSTATION SERVICE POWER SUPPLY TRANSMISSION LINE Voltage level: 22kV Number of circuits: 1 Starting point : Tower No. 136 of the 22kV transmission line supplying power for Nhan Vinh 22kV substation. Ending point : Substation service power supply 22 (35)/0.4kV-560kVA substation. Construction local: Dai Dong and Viet Hung Commune, Van Lam District, Hung Yen Province. Length : 2,423m. Conductor : ACSR-70/11. Insulators: glass or ceramic insulator or equivalent technical characteristics insulators in accordance with IEC standards. Tower: Centrifugal spun reinforced concrete column, 10.5m height. Tower foundation: Cast in-place reinforced concrete mass foundation. Arms, fastening belts: using figural hot dip galvanized steel . Other technical solutions: Earthing, prohibition boards, signboards on the transmission lines shall be arranged according to Electrical equipment Code No. 11 Branch Standard TCN 19-2006.

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report CHAPTER 8 : SOLUTIONS APPLIED FOR TELECOMMUNICATION 8.1. SOLUTION APPLIED FOR PLC TELECOMMUNICATION 8.1.1 At 500kV side: Currently, phase-phase (A-B) Power Line Carrier telecommunication system is operating on Quang Ninh – Thuong Tin 500kV transmission line. When Pho Noi 500kV substation shall be put into operation, it shall be connected to 500kV Quang Ninh – Thuong Tin transmission line. This project shall consider transferring PLC equipments (line trap, power line carrier, device coupling, teleprotection…) from Thuong Tin to Pho Noi in order to re-establish PLC telecommunication system on Quang Ninh – Pho Noi 500kV transmission line and to equip new PLC equipments which shall be synchronous with equipments of Thuong Tin – Pho Noi for establishing PLC telecommunication system on Thuong Tin – Pho Noi 220kV transmission line (protecting for Thuong Tin – Pho Noi 500kV transmission line). 8.1.2 At 220kV side: Currently, phase-ground (phase B) PLC telecomunication system is operating on Pha Lai Thermal power complex – Thuong Tin 220kV transmission line. The PLC telecommunication system of Pha Lai Thermal power complex – Pho Noi has been taken back for other projects. The electricity solution of project: connecting to Pha Lai Thermal power complex – Thuong Tin and Pha Lai Thermal power complex – Pho Noi 220kV transmission line. This project shall consider transferring PLC equipments (line trap, device coupling, power line carrier …) from Thuong Tin 500kV substation to Pho Noi 500kV substation in order to re- establish PLC telecommunication system on Pha Lai Thermal power complex – Pho Noi 220kV transmission line (1 circuit). The PLC telecommunication system on 220kV transmission line connecting Pho Noi 220kV substation to Pho Noi 500kV substation shall be formed (and equipped with new ground wire) for optical transmission application. Invest new PLC telecomunication system on Thuong Tin - Pho Noi 220KV transmission line (or consider transferring equipments of internal NPT) to supply intertripping telecommunication channel for back-up protection of Thuong Tin – Pho Noi 500kV transmission line (2 circuits) At that time, intertripping transmission for protection of Thuong Tin – Pho Noi 220kV transmission line shall use digital channel of optical telecommunication line on 500kV transmission line, intertripping transmission for protection of 220kV transmission line connecting Pho Noi 220kV substation to 500kV Pho Noi substation shall use digital channel of optical communication line on 220kV transmission line. Intertripping transmission for protection of Pha Lai – Pho Noi 220kV transmission line (2 circuits) shall use its circuit 1 for PLC telecommunication transmission. 8.2. SOLUTION APPLIED FOR OPTICAL TELECOMMUNICATION The OPGW-24SM optical telecommunication system is operating with the transmission speed of 2,5Gbit/s on Quang Ninh – Thuong Tin 500kV transmission line. This project will invest 1 equipment package including STM16, PCM-30, PABX for Pho Noi 500kV substation to 26

Pho Noi 500kV Substation & Connecting Branches Feasibility Study Summary Report drop/insert and transmit telecommunication signal to substation. It is expected that when Pho Noi 500kV substation shall be put into operation, it shall be connected to one 500kV feeder of Hiep Hoa 500kV substation and two 220kV feeders of Bac Ninh 2 220kV substation. Therefore, STM-16 equipment shall be eqipped with spare interface transmission cards to transmit telecommunication signal to Hiep Hoa 500kV substation and Bac Ninh 2 220kV substation. Establish ring telecommunication system: << Thuong Tin – Pho Noi – Quang Ninh – Thuong Tin >>. When Hiep Hoa 500kV substation and Bac Ninh 2 220kV substation shall be connected to Pho Noi 500kV substation, this will form a ring << Pho Noi – Hiep Hoa – Bac Ninh 2 - Pho Noi >>. For 220kV transmission line connecting Pho Noi 220kV substaion to Pho Noi 500kV substation: invest optical cable (and equip with new ground wire) and equip it with terminal equipment at Pho Noi 220kV substation which shall be synchronous with that of Pho Noi 500kV substation to establish telecommunication channels for application (intertripping, transferring equipments from PLC channels to optical telecommunication channels for SCADA and hot- line…) The exchange capacity at Pho Noi 500kV substation shall have more than 32 telecommunication channels which are served for telecommunication demand and electricity system balance of substation. It shall be connected 2MBps trunk to Flexicom-6000 exchange at VT1 (18 Tran Nguyen Han) and shall be prepared with spare trunks for connecting to exchanges at Hiep Hoa 500kV substation and Bac Ninh 2 220kV substation. Establish voice channel and data channel to transmit SCADA signal and hot-line to A1 and A0. This project has been a change of PLC transmission to optical telecommunication transmission at Pho Noi 220kV substation. Therefore, it is necessary to modify its connection for re-establishing the current PLC channel to optical telecommunication channel in this investment.

Power Transmission Investment Program (RRP VIE 42039)

Feasibility Study

Project Number: 42039-034 November 2011

Multitranche Financing Facility Socialist Republic of Viet Nam: Power Transmission Investment Program

Summary Report 200 kV Phu My 2 Industrial Zone Substation

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Table of Contents 1. Necessity 1.1 Project necessity ...... 4 1.2 Project objectives ...... 5 1.3 Geographical features ...... 5 1.4 Economy, society of project situation ...... 6 1.5 Existing and future electrical source layout ...... 6

2. Location and Project size ...... 8 2.1 Geography ...... 8 2.2 Scope of Project ...... 8 Substation ...... 8 Communication and SCADA system ...... 8 Transmission line connection ...... 8

3. Load forecast ...... 9 3.1 Local load situation ...... 9 Industry and agriculture ...... 9 Infrastructure ...... 9 Investment attraction project ...... 9 Load and generation needs ...... 9 Load forecast after 2010 ...... 10

4. Technical solutions ...... 11 Choosing voltage level ...... 11 Choosing substation capacity, quantity of power transformer ...... 11 Choosing quantity of outgoing feeders at voltage levels ...... 11 Choosing main connection diagram ...... 11 Electrical layout regarding to future upgrading ...... 12 Choosing technical solution for measuring, control and protection system...... 13 Control system ...... 13 Measuring system ...... 13 Protection and automation system ...... 13 Auxiliary supply ...... 15 380/220 V AC system ...... 15 DC distribution system ...... 15 Lightning protection, earthing and illuminating system: ...... 15

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Lightning protection system ...... 15 Earthing system ...... 15 Illuminating and security systems ...... 15 Main construction solutions ...... 16 Main characteristics ...... 16 General layout ...... 16 Level the layout ...... 16 Outdoor construction solutions ...... 16 Supporting structures ...... 16 Foundations ...... 16 Cable trenches ...... 16 Gates and fences ...... 17 Interior road and access road ...... 17 Oil sump tank ...... 17 Structural and architectural solutions for control building and other auxiliary houses ...... 17 Structural solution ...... 17 Architectural solution ...... 17 Technical solutions for water supply, drainage and fire fighting systems ...... 18 Water supply system ...... 18 Drainage system ...... 18 Fire fighting system ...... 18 Ventilation of control building ...... 19 Network connection solutions...... 19 Substation transmission line connections ...... 19 Communication ...... 19 Data transmission technology solution ...... 19

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

1. Necessity

1.1 Project necessity

According to “Power grid scheme development and improvement in 2006-2010 stage, regarding to 2015 of Tan Thanh district, Ba Ria-Vung Tau province”, load forecasting of zones of Tan Thanh district was listed as follows: Table A: 110 kV substations on period before 2010

Substation Year of Power Load (%) Power Total (MVA) Operation Installation load (MVA) (MVA) Phu My steel Existing 100 75 75 120

60 75 45 Phu My Existing 63 75 47.25 94.5

63 75 47.25

Phu My 1 Existing 30 75 22.5 45

30 75 22.5

Thep Viet Existing 45 75 33.75 67.5

45 75 33.75

Posco 2008 150 74 111 111 Thi Vai 2008 63 50 31.5 63 63 50 31.5

Total 501

On this condition, two transformers T5 and T6 (2x250MVA) of Phu My 1 thermal plant can be suitable. Table B: Load forecast 110 kV substations on period after 2010

Substation Year of Power Load Consumed Total (MVA) operation installation factor power (MVA) (MVA) (%) Phu My steel Existing 100 80 80.0 128.0

60 80 48.0

Phu My Existing 63 80 50.4 100.8

63 80 50.4

Phu My 1 Existing 30 80 24.0 48.0

30 80 24.0

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Thep Viet Existing 45 80 36.0 72.0 45 80 36.0

Posco 2008 150 80 120.0 120.0 Thi Vai 2008 63 80 50.4 100.8

63 80 50.4

Hoa Sen steel After 2010 40 50 20.0 20.0

Essar steel After 2010 40 50 20.0 40.0 40 50 20.0 Phu My 3 IZ After 2010 63 50 31.5 63.0 63 50 31.5 Cai Mep Ha IZ After 2010 63 50 31.5 31.5 Phu My 2 After 2010 63 50 31.5 31.5 extension Trung Tuong After 2010 63 50 31.5 31.5 steel Total 787.1

The solution of power supplying for this region as follows: (i) Period 2005–2010: this region will be supplied by 220 kV- 2x250 MVA Phu My 1 substations. (ii) Period 2010–2015: it’s expected to be also supplied by the 220 kV- 3x250 MVA Phu My 2 industrial zone substations, which will be operated in 2010 in order to support to load demand of this region in this period.

1.2 Project objectives

220 kV Phu My 2 substations will respond to load growth of zone 2 of Ba Ria-Vung Tau province with total load demand about 186 MW in 2007 and 501 MW in 2010. Ensure the supply reliability. Enhance the electrical quality and power supply ability Expected energy sold and losses rating of the system with the project:

2007 2010 2015 2020 Energy (GWh) 788 2989 5855 9281 Losses (%) 7 7 7 7

1.3 Geographical features

Tan Thanh district of Ba Ria-Vung Tau province locates in the East area of South Viet Nam, belong the main sector of economy of the South.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Being contiguous to Dong Nai province in the North, to Chau Duc district in the East, to Can Gio district (Hochiminh City) in the West and Ba Ria town in the South. It’s about 65km far from Ho Chi Minh City. Natural area: 34,152 ha. Population: 92,923 people in 2007. The district has 1 township and 8 communes: Phu My Township, My Xuan, Phuoc Ha, Hoi Bai, Chau Pha, Hac Dich, Toc Tien and Song Xoai commune.

1.4 Economy, society of project situation

Economic structure had rather grown quick, by 78% industry and 16% living activities agriculture in the last two year. Industry: Industrial production has averaged value out at 38% a year. Service: GDP of service increased by 19.24% in 2005–2006 and has averaged at 15–20% a year in a period 2006–2010. Agricultural: Cultivated area: 53,841 ha, decrease 1.8% in the same time of the last year. Import-export: Import-export turn-over has averaged value out at 28.9% a year. In period of 2010 (2020), Tan Thanh district has planned to develop 07 industrial zones with total area 5,233ha such as : Phu My II; Cai Mep, Phu My II extension, Phu My III, Cai Mep Ha, Long Huong and Long Son.

1.5 Existing and future electrical source layout

In present, Ba Ria-Vung Tau power grid is mainly supplied by the 500 kV- 450 MVA Phu My substation and two 500 kV Phu My-Nha Be and Phu My- Phu Lam transmission lines and the 220 kV Phu My-Ba Ria, Phu My-Long Thanh, Phu My-Nha Be, Phu My-Cat Lai transmission lines across this province. There are substations in this area as follows: 500 kV Phu My substation: - Situated in Tan Thanh district, Ba Ria-Vung Tau province - Rated voltage: 500/220 kV-450 MVA, 220/110 kV-2x250 MVA - Supplied by the transmission lines 500 kV Phu My-Nha Be and Phu My-Phu Lam. - Supply mainly to 110 kV Phu My, Thep Viet, Phu My steel plant and Posco substations. 220kV Phu My substation: - Situated in Tan Thanh district, Ba Ria-Vung Tau province. - Rated voltage: 220/110kV - Capacity: 2x250MVA - Supplied by the 500/220kV Phu My substation. - Supply mainly to 110kV Phu My, Thep Viet, Phu My steel plant and Posco substations. 110 kV Phu My steel plant substation:

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

- Situated in Tan Thanh district, Ba Ria-Vung Tau province. - Rated voltage: 110/22 kV - Capacity: 1x100 MVA + 1x60 MVA - Supplied by the 220/110 kV Phu My substation. 110 kV Phu My substation: - Situated in Tan Thanh district, Ba Ria-Vung Tau province. - Rated voltage: 110/22 kV - Capacity: 2x63 MVA - Supplied by the 220/110 kV Phu My substation. 110kV Thep Viet substation: - Situated in Tan Thanh district, Ba Ria-Vung Tau province. - Rate voltage: 110/33 kV and 110/22 kV - Capacity: 2x45 MVA - Supplied by the 220/110 kV Phu My substation.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

2. Location and Project size

2.1 Geography

The 220 kV Phu My 2 industrial zone substation will be constructed in Ong Trinh ward, Tan Phuoc commune, Tan Thanh district, Ba Ria-Vung Tau province.

2.2 Scope of Project

Substation Two power auto-transformers: 225+8x1.25%/115/23 kV– 250 MVA. 220 kV side: double busbar diagram with bus-tie. 220kV bays: two transformer bays, four O/H line outgoing bays (Phu My 1, Phu My 2 and Ba Ria 1, Ba Ria 2), one bus coupling bay. 110 kV side: double busbar diagram with bus-tie. 110 kV bays: two 250 MVA transformer bay, one bus coupling bay, eight O/H line outgoing bays (Posco 1, Posco 2, Thi Vai 1, Thi Vai 2, Phu My 1, Phu My 2, Southern Steel 1, and Southern Steel 2). 22 kV side diagram: single busbar (only supply power for 02 auxiliary transformers) Control and protection equipment: using computerized control and modern protection systems. The control, protection cubicles are placed indoor, and communicate with computerized control system by fiber optic cables. Measuring and protection is equipped in accordance with EVN Standard and Regulations. Communication and SCADA system One optical communication route is established between 220kV Phu My 2 industrial zone substation and 220 kV Phu My thermal plant substation. One public telephone subscribe of Ba Ria-Vung Tau province. Send/Receive SCADA/EMS signals between Southern Load Dispatching Center and 220 kV Industrial zone Phu My 2 substation via the computerized system gateway connected to optical communication system of 220 kV Industrial zone Phu My 2 substation and existing optical communication system.

Transmission line connection 220 kV side The substation is connected to the 220 kV Phu My thermal plant – Ba Ria thermal plant double circuit transmission lines. 110 kV side: 220/110 kV Phu My 2 industrial zone substation has 8 outgoing feeders, including 2 feeders supply power to the existing 110 kV Southern Steel substation, 2 feeder supply to the existing Phu My substation, 2 feeder supply to Posco substation and 2 feeder supply to Thi Vai substation.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

3. Load forecast

3.1 Local load situation

Industry and agriculture Agriculture: - The cultivated area is decrease because the new areas for industrial zone increase very fast in recent year. Industry: - Due to geography, it can attract investment’s capital for industry such as: steel, mechanism, textile and others. There are some industrial zones which are planed by the local governor such as Phu My I, II; My Xuan A1, My Xuan A2, My Xuan B1, Cai Mep, Long Son and Phu My III and so on. - Industrial economic sector plays important roles and bases for improving other economic sectors. Infrastructure Traffic: - The local governor is constructing and upgrading traffic routes of the district very fast. Import-export: - Import-export turn-over has averaged value out at 29% a year. Investment attraction project Domestic investment: In present, Tan Thanh district has 157 private, limited, joint- stock companies … with total charter capital is about 5.89 billion USD and total business capital has increased about 3–5 times. Foreign investment: In present, Tan Thanh district has 75 foreign-invested projects with total invested capital more than 4.43 billion USD. Load and generation needs In future, Tan Thanh district will be one of the best industrial and economic centers in the East South of Viet Nam. Power demand increases continuously. Responding to this demand is an urgent task of the EVN, so constructing transmission substations and lines for this area is urgent necessity. a. Electrical using structure: see Table 1. According to statistical and forecasted values in 2005,2010 and 2015 period, electricity supplying for living activities was over 16.8%, this rate reduced to 15.7% in 2015. The rate of electricity for industry came the first, after living activities, always over 74% each year and has increased gradually in recent years. b. The average rate of electricity demand growing per year: (i) 2006–2010 periods: 25% (ii) 2015 periods: 36%

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Load forecast after 2010

The 220 kV Phu My 2 industrial zone substation is expected to supply power for 110 kV substations after 2010, as following:

Substation Year of Power Load (%) Power load Total (MVA) operation installation (MVA) (MVA) Phu My steel Existing 100 80 80.0 128.0

60 80 48.0

Phu My Existing 63 80 50.4 100.8

63 80 50.4 Phu My 1 Existing 30 80 24.0 48.0

30 80 24.0

Thep Viet Existing 45 80 36.0 72.0 45 80 36.0 Posco 2008 150 80 120.0 120.0 Thi Vai 2008 63 80 50.40 100.8

63 80 50.40

Hoa Sen steel After 2010 40 50 20.0 20.0

Essar steel After 2010 40 50 20.0 40.0 40 50 20.0 Phu My 3 IZ After 2010 63 50 31.50 63.0 63 50 31.50

Cai Mep Ha IZ After 2010 63 50 31.50 31.5 Phu My 2 After 2010 63 50 31.50 31.5 extension Trung Tuong After 2010 63 50 31,50 31.5 steel Total 787.1

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

4. Technical solutions

Choosing voltage level

Selected voltage levels are: High voltage levels: 220 kV, 110 kV Medium voltage level: 22 kV

Choosing substation capacity, quantity of power transformer

In accordance with the result of power flow, expectation of substation’s capacity is 3x250 MVA for 220/110 kV substation. In this stage will be installed the two transformers 250 MVA. In the future stage will be installed the third transformer 250 MVA.

Choosing quantity of outgoing feeders at voltage levels

According to “The master plan of electrical developing of Tan Thanh district” and local power grid, expectative outgoing feeders are listed below: 220 kV side: - In this stage will be installed 04 outgoing feeders as follows: Phu My 1, Phu My 2 and Ba Ria 1, Ba Ria 1. - The spare space will be planed for 02 outgoing feeders as follows: Son My 1, Son My 2 and two spare feeders. 110 kV side: - In this stage will be installed 08 outgoing feeders as follows: Posco 1, Posco 2, Thi Vai 1, Thi Vai 2, Phu My 1, Phu My 2, and Southern steel 1, Southern steel 2. - The spare space will be planed for 08 future outgoing feeders as follows: 02 bays for Cai Mep industrial zone, 02 bays for Phu My 3 industrial zone, 02 bays for Phu My 2 industrial zone extension, and two spare feeders for capacitors. 22 kV side: - Only supply for auxiliary transformer.

Choosing main connection diagram

The basic requirements of electrical connection diagram are security, confidence, simple structure, flexible operation, economy and human safety.

220 kV side - Use double busbar scheme. In this stage, it is installed with following bays: - Two bays for O/H line feeder to Phu My substation. - Two bays for O/H line feeder to Ba Ria substation. - Two bays for 1T and 2T transformers (250MVA)

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

- One bay for bus coupler In future, the following bays will be installed: - One bay for the transformer 3T. - Two bays for O/H line feeder to Son My thermal plant. - Two bays for spare - The 220 kV busbar: aluminium Ø160/148mm. 110 kV side Use double busbar scheme. In this stage, it is installed with following bays: - Two bays for 1T and 2T transformers (250 MVA) - One bay for bus coupler - Two bays for O/H line feeder to 110 kV Posco substation. - Two bays for O/H line feeder to 110 kV Thi Vai substation. - Two bays for O/H line feeder to 110 kV Southern Steel substation. - Two bays for O/H line feeder to 110 kV Phu My 1 substation. In future, the following bays will be installed: - One bay for 3T transformer (250 MVA). - Two bays for O/H line feeder to 110 kV Cai Mep industrial zone substation. - Two bays for O/H line feeder to 110 kV Phu My 3 industrial zone substation. - Two bays for O/H line feeder to 110 kV Phu My 2 industrial zone extension substation. - Two spare bays for 110 kV capacitor banks. - The 110 kV busbar: aluminium Ø160/148mm. 22 kV side Use single busbar scheme, outdoor equipment. Only supply for auxiliary transformer with following bays: - Two set of 22 kV incoming circuit breakers - Six set of 22 kV voltage transformers - Six set of 22 kV current transformers - Two set of three phases disconnectors - Six set of 22kV lightning arresters

Electrical layout regarding to future upgrading

220 kV Phu My 2 industrial zone substation’s layout is designed for installation for 3 auto-power transformers 250 MVA.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Choosing technical solution for measuring, control and protection system.

Control system Control system for 220 kV, 110 kV, 22 kV feeders will be equipped with several levels as follows: - Bay levels: at equipment for maintenance only and “Bay controller” placed at control and protection cubicles, for emergency control. - Substation level: by computerized control system in the control room. - System level: from SLDC by SCADA system. Computer control system must use the open system, using LAN net, Ethernet with the new communication standard: IEC 61850. Measuring system System state parameter will be accessed by bay’s measuring system, computer system and SCADA. 220 kV side of main transformer: equip one multi-functional meter for A, V, W, VAr, Cos , Wh, VArh, and communication port for central control system and SCADA/EMS system. 110 kV side of main transformer: equip one multi-meter system for A, V, W, VAr,

SCADA/EMS system. 110 kV feeders: equip multi- communication port for central control system and SCADA/EMS system. 22 kV incoming: equip one multi- and communication port for central control system and SCADA/EMS system. Auxiliary supply: measuring for voltage, DC current, AC current, Wh. Protection and automation system All main protection relays are digital or numerical type, with communication ports to communicate with central control system, SCADA/EMS. 220 kV feeders Main protection: - Line differential protection (87L) - Distance protection (21) - Autoreclosing (79) with synch-check function (25) - Directional spare overcurrent grounded protection (67N) - Spare overcurrent protection (51) for losing voltage - Communication (85) Back-up protection: - Distance protection (21) - Directional phase overcurrent and ground overcurrent (67/67N) - Breaker failure (50BF)

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

- Trip circuit supervision (74) 110 kV feeders Main protection: - Distance protection (21) - Autoreclosing (79) with synch-check function (25) - Directional overcurrent grounded protection (67N) - Spare overcurrent protection (51) for losing voltage - Communication (85) Backup protection: - Directional phase overcurrent and ground overcurrent (67/67N) - Breaker failure (50BF) - Trip circuit supervision (74) 220 kV busbar protection Low impedance differential protection for double busbar having bus coupler 110 kV busbar protection Low impedance differential protection for double busbar having bus coupler Load shedding. Main transformer protection First main protection: - 3 phase transformer differential protection using transformer feeder’s CT Second main protection: - 3 phase transformer differential protection transformer’s bushing CT Backup protection: - Overload protection (49) - Restricted earth fault (REF) protection. - Neutral overcurrent grounding at 220kV side of main transformer (51N). - Directional phase and grounding overcurrent at 110kV side (67/67N). - Directional phase and grounding overcurrent at 220kV side (67/67N) - Breaker failure protection (50BF) - Transformer internal relays such as buccholz relay (96-1, 96-2), OLTC buccholz relay, double temperature relay (26-1, 26-2), rapid pressure relay, oil low (33) … 22 kV Incoming feeder - Phase overcurrent protection (50/51) - Breaker failure protection (50BF) - Trip circuit supervision (74) Auxiliary transformer 14

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Medium voltage side: using fuse combines with load break switch, placed in metal- clad cubicle for main auxiliary transformer and outdoor fuse-cut-out (FCO) for the reserve auxiliary transformer. Low voltage side: using miniature circuit breaker. Overvoltage, undervoltage alarms

Auxiliary supply

380/220 V AC system In first stage, there are two auxiliary transformers connecting to different sources: - One 3-phases main auxiliary transformer 22+2x2.5%/0.4kV – 250 kVA is connected to 22 kV side of 1T power autotransformer. - One 3-phases spare auxiliary transformer 22+2x2.5%/0.4 kV – 250 kVA is connected to 22 kV side of 2T power autotransformer. DC distribution system In this stage, 220 V DC auxiliary source will be installed. This system consists of two battery chargers, two 220 V DC – 300 Ah nickel-cadmium battery and DC distribution system.. This system include two inverters UPS 2500 VA to supply 220 V AC for computer system. This 220 V AC system supplies for computers, servers, printers. 48 V DC system: feed the communication system and SCADA. This system includes one charger cubicle, 48 VDC 200 Ah nickel-cadmium battery and DC distribution system.

Lightning protection, earthing and illuminating system:

Lightning protection system The substation will be installed lightning rod and GSW conductor for protection against direct lightning stroke. Surge arresters will be installed in front of and in the rear of the power transformers. Earthing system Earthing system are designed based on thermal-mechanical reliability, touch and step-voltages according to IEEE 80-1986 and according to Vietnamese regulations. Illuminating and security systems Illuminating system consists of two main parts: outdoor and indoor lightings. Outdoor lighting system lights the substation switchyard, the substation’s fence and the entrance road. Outdoor lighting use mercury high-pressured lamps, placed on 220 kV, 110 kV gantries and lightning towers. The requesting luminosity is >20lux. Indoor lighting system equipped for control room, medium switchgear house, guarding house, water pump house etc., using mainly fluorescent lamps. Unexplosive lamp will be used for battery room. Working lighting system: using 2x40 W, 1x40 W fluorescent lamps. The requesting luminosity is >300 lux. Emergency lighting system: using 75 W, 220 V DC incandescent lamps and supplying power by the substation’s batteries.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Beside, for the security supervision, a monitoring camera system with 05 cameras will be installed around substation and at the main entrance gate.

Main construction solutions

Main characteristics The 220 kV Phu My 2 industrial zone substation will be constructed in Ong Trinh ward, Tan Phuoc commune, Tan Thanh district, Ba Ria-Vung Tau province. General layout The general layout is designed based on the arrangement of 22 kV, 110 kV and 220 kV equipment, power transformers, auxiliary transformers in outdoors. The computer system, servicing panels are located indoor. The total area counted by the substation fences: 29,735m2 and a dormitory house 18,5x45,0m. The total area entrance road: 6,259m2, connecting with the existing 965 province road. Level the layout Natural high level is from 0.9m to 1.1m, higher than 2% frequency flood level (+1.52m). Complete high level after leveling is: +2.70m. After constructing all foundations, cable trances, all area extension will be laid by a 100 mm deep 1x2 grade macadam to finish.

Outdoor construction solutions

Supporting structures Supporting structures of 110 kV, 220 kV circuit breakers and disconnecting switches will be supplied complete with equipment. 110 kV, 220 kV gantries, CT-CVT-PI-SA supporting structures will be locally made of galvanized shape steel. Foundations Main transformer’s foundation (designed for 250 MVA transformer) will be reinforced concrete, in situ cast with 2x4 stones, concrete grade M200. The structure of foundation will satisfy requisition of fire protection – having a void volume that can contain all transformer oil in case of fire or explosion. Foundation of supporting structures ... will be also reinforced concrete and in situ cast with concrete grade M200, 2x4 stones. They will be connected to steel structures by anchor bolts. Cable trenches Outdoor cable trenches have inside dimensions b = 200mm and b=1000mm. The base and walls will be reinforced concrete, in situ cast with concrete grade M200, 1x2 stone. All the cover plates will be recast. The bottom of trenches bottom will be slopped for draining purpose. Crossing road trenches will be reinforced strong enough to bear vehicle load of transformer conveying (H30). Trenches in control room and 22 kV switchgear room have inside width b = 600mm, 1000mm and 2000m, made of in situ cast reinforced concrete having concrete grade

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

M200. The cover plates will be checkered leaves of 5/7 galvanized steel sheets and the bottom will be sloped for drainage. All the supports will be galvanized shape steel and connected to the walls of cable trench by anchor bolts Gates and fences Main gate will be sliding frame made of shape steel and have an inside width of 6000mm. Man gate will be 2 leaves opening outside and have an inside width of 3000mm. Fences will be brick wall. Steel structures of gates and fences will be covered by rust – proof coat and colored coat. Gate posts, fence posts and their base will be in situ cast with reinforced concrete having concrete grade M200. The posts will be bound each other by reinforced concrete beams. These link beams will be made of 1x2 stones concrete grade M200. Interior road and access road Interior roads width is varying 4.0 to 6.0m. The structure includes following layers: Macadam layer with the depth of 300mm, density K = 0.95 Oil-paper layer with the depth of 2mm Concrete grade M300 layer with the depth of 200-250mm There are expansive joints each 4m along the road. Oil sump tank Oil sump tank will have capacity of 70m3. Its base and walls will be in situ cast reinforced concrete with concrete grade M200.

Structural and architectural solutions for control building and other auxiliary houses

Structural solution Plan size of the control building will be 12mx28m. Plan size of the dormitory house will be 9.6mx25.2m. Plan size of the control-protection cubicle houses will be 10.8m x 3.6m. All these will be one-story houses and their main bearing structures will be reinforced concrete frame and continuous foundation. The reinforced concrete roofs will be covered by thermal insulating layer and water -proof layer. Architectural solution Walls will be made of hollow and solid brick, 200mm thick for exterior walls and 100mm thick for interior walls. They will be all painted. The floor will be covered by ceramic tile. Doors and windows will be all grass with aluminum frame. The control building has following rooms and compartments: - Control room.

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

- Substation manager’s room. - Telecommunication room. - General room. - Battery room - Hall and corridor. - Storage. - WC. The total area of control building will be 336.0m2 (by axes of lateral column)

Technical solutions for water supply, drainage and fire fighting systems

Water supply system Water will be pumped from well to 5m3 tank placed on 15m high shape steel tower and it supplies sanitary wares then. Drainage system Drainage system includes drainage of the area and drainage of the cable trenches. Cable trenches’ bottom will be slopped in order to drain off the water to the deepest place and then water will be discharged to terminal manholes. The substation’s yard will have a slope 0.2% and the cross section of interior roads will have a slope 1%. Rainwater will be collected to manholes arranged both side of roads and discharge to terminal manholes by sewers. From terminal manholes, water will be discharged into existing sewers outside the substation. Fire fighting system Fire pump house Total plan area: 24.0m2 Painted brick wall Cement floor Scrolling door, ventilated by louvers Steel cladding roof, steel rafter There are two electric pumps, with Q=70m3/h - H= 70m each , one jockey pump 5,4m3/h - H=80m, and other devices. Outdoor fire fighting system Cylinders -150mm and fitting devices. In situ cast reinforced concrete bases having concrete grade M200 Shape steel supports for pipes. These supports will be connected to bases by anchor bolts. Cylinders and pipes will be arranged along the roads. Other devices

200 kV Phu My 2 Industrial Zone Substation Feasibilty Study Summary Report

Sand stands Fire-extinguishers Ladders, shovels These tools will be placed at easily access positions. Fire fighting tank In substation’s yard, a fire-fighting tank will be constructed. The tank will be reinforced concrete, has a volume of 150m3 for ensure fire-extinguished capacity.

Ventilation of control building

Control room and workrooms will be equipped with air-conditioners and ventilators. Chambers will have ceiling fans Battery room will have ventilators

Network connection solutions

Substation transmission line connections 220 kV side: 220 kV Phu My thermal plant – Phu My 2 substation transmission line (two circuits): from 220 kV entrance gantry of 220 kV Phu My thermal plant substation to 220kV entrance gantry of 220 kV Phu My 2 substation. 220 kV Ba Ria thermal plant – Phu My 2 substation transmission line (two circuits): from 220 kV entrance gantry of 220 kV Ba Ria thermal plant substation to 220kV entrance gantry of 220 kV Phu My 2 substation. The connection line (four circuits) is 1,707m length with ACSR/MZ500/64 conductor (two conductors/phase). 110 kV side: In this stage, 110 kV side of 220/110 kV Phu My 2 substation has 8 outgoing feeders including : Posco 1, Posco 2, Thi Vai 1, Thi Vai 2, Phu My 1, Phu My 2, and Southern steel 1, Southern steel 2. 110 kV transmission line with two OH lines (four circuits) from 110 kV entrance gantry of 220 kV Phu My 2 substation to 110 kV Posco-Thi Vai existing gantry. The first connection line (four circuits) is 831m length with ACSR/MZ400/51 conductor. The second connection line (four circuits) is 913m length with ACSR/MZ400/51 conductor. Communication For control, management and SCADA link to Southern Load Dispatching Center (A2).This system installed completely in this stage. Data transmission technology solution The substation uses the computerized control system to gather DATA and transmits to A2 by the optical communication.

Power Transmission Investment Program (RRP VIE 42039)

Feasibility Study

Project Number: 42039-034 November 2011

Multitranche Financing Facility Socialist Republic of Viet Nam: Power Transmission Investment Program

Summary Report 220 kV Song May–Uyen Hung Transmission Line

20kV Song May - Uyen Hung T/L Summary Report of FS

CONTENTS

Chapter 1 : Necessity of project 3

Chapter 2 : Existing area network 5

Chapter 3 : Location and project size 14

Chapter 4 : Load forecasting 17

Chapter 5 : Technical solutions 18

Chapter 6 : Project execution 37

Chapter 7 : Procurement of goods and refunding the budget 38

Annexes

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220kV Song May - Uyen Hung T/L Summary Report of FS

ABBREVIATION

EMP : Environmental Management Plan EVN : Viet Nam Electricity NPT : National Power Transmission Corporation DSM : Detail measurement survey PAH : Project affected household PAP : Project affected person PC : People’s Committee PPC : Provincial People’s Committee PECC3 : Power Engineering & Consulting Joint Stock Company No.3 PTC4 : Power Transmission Company No.4 RCC : Resettlement & Compensation Committee ROW : Right of way RP : Resettlement Plan SPPMB : Southern Power Project Management Board VND : Vietnam Dong

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 1 NECESSITY OF PROJECT

1.1. Project’s legal backgrounds

FEASIBILITY STUDY (FS) on 220kV Song May - Uyen Hung transmission line are prepared based on the following backgrounds:

- Vietnam’s Power Network Master Plan in phase-six approved by Prime Minster as the decision 110/2007-QD-TTg, signed on on 18th of July, 2007. - Binh Duong’s power network plan in 2005-2010 (up to 2015) approved by Ministry and Industry by letter No. 1821/QĐ-NLDK dated on 20 May, 2005.

- The route of line is approved by People’s Committee of Dong Nai Province by letter No. 752/UBND-CNN dated on 24 January, 2008.

- The route of line is approved by People’s Committee of Binh Duong Province by letter No. 404/UBND-SX dated on 20 February, 2008.

- Feasibility study report on 220kV Song May - Uyen Hung transmission line approved by NPT as the decision 688/QĐ-NPT, signed on 17th April, 2009.

- Revised Feasibility study report on 220kV Song May - Uyen Hung transmission line approved by NPT as the decision 711/QĐ-NPT, signed on 23th August, 2010.

1.2. The necessary of investment project

220kV Song May - Uyen Hung transmission line is built with main reasons as follows:

- Based on the electricity demand of Binh Duong in 2005-2015 and Binh Duong’s power network development plan.

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220kV Song May - Uyen Hung T/L Summary Report of FS

- Supply electricity for Tan Uyen district, Binh Duong province through 220kV Uyen Hung substation.

1.3. Objective of project.

- The lines are built to supply electricity for Tan Uyen district, Binh Duong province.

- The lines and 220kV Uyen Hung substation are able to meet the demand forecast and improve the quality of electrical supply for Tan Uyen district, Binh Duong province and neighboring areas.

- Reduction of network losses and reduction of outages time due to faults.

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 2 EXISTING AREA NETWORK

2.1. Existing power sources and electrical network

2.1.1. Existing Dong Nai province’s power sources and electrical network

Presently, Dong Nai province’s existing electrical networks are supplied from power sources such as: - Tri An hydropower plant (4x100MW). - Formosa power plant (150MW). - Ham Thuan hydro power plant (2x150MW), Da Mi (2x87MW). - Phu My1 power plant (360MW) and Phu My 2 power plant (1015MW). - Ve Dan power plant (68MW). - AMATA power plant (2x6.4MW). - Hoa An diesel power plant (13MW).

The existing transmission lines at Dong Nai province are as follows:

No. Name of transmission line Conductor Length Load % load current (Imax)

1 220kV Double circuit Formosa - AC-400 1km 168A 22% Long Thanh T/L

2 220kV double circuit Long Thanh - ACSR -795 25km 500A/598A 67%/80% Long Binh T/L

3 220kV Phu My - Long Thanh T/L ACSR -795 25.4km 523A 70%

4 220kV Da Mi - Long Thanh T/L AC-400 124km 515A 69%

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220kV Song May - Uyen Hung T/L Summary Report of FS

5 220kV Ham Thuan - Long AC-400 140km 620A 83% Thanh T/L

6 220kV Tri An - Long Binh AC-300 29km 689A 111% T/L

7 220kV Bao Loc - Long Binh ACSR-795 130km 448A 60% T/L

8 220kV double circuit Long 2xACSR- 18km 776A 52% Binh - Thu Duc T/L 795

9 220kV Tri An - Hoc Mon AC-400 17km 545A 73% T/L

10 220kV Tri An - Binh Hoa AC-400 34.4km 575A 77% T/L

12 110kV Long Thanh - Tuy AC-240 1.2km 168A 30% Ha T/L

13 110kV double circuit Long AC-240 25.6km 480A/413A 87%/75% Thanh - Long Binh T/L

14 110kV double circuit Phu AC-240 25.4km 441A/408A 80%/74% My - Long Thanh T/L

15 110kV Long Binh - Dong AC-240 11km 391A 71% Nai T/L

16 110kV Long Binh - Thu Duc AC-400 0.5km 525A 70% Bac T/L

17 110kV Long Binh - Bien AC-400 2km 525A 70% Hoa 1 T/L

18 110kV Long Binh - Bien AC-400 5.5km 313A 42% Hoa 2 T/L

19 110kV Long Binh - An Binh AC-400 0.5km 335km 45% T/L

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20 110kV An Binh - Amata T/L AC-400 2.5km 112km 15%

21 110kV Long Binh - Xuan AC-240 44.65km 400A 76% Truong T/L

22 110kV Tri An - Dinh Quan AC-185 53.7km 112A 24%

23 110kV Tri An - Tan Hoa AC-240 17km 142A 31% T/L

24 110kV Tri An - Dong Xoai AC-185 60.7km 168A 37%

2.1.2. Existing Binh Duong province’s power sources and electrical network

Presently, Binh Duong province’s exiting electrical network are supplied from power sources such as: - Thac Mo hydropower plant (2x75MW). - Can Don hydropower plant (2x38,8)MW. - Tri An hydropower plant (4x100MW). - Thu Duc thermal power plant (2x37,5MW). - VSIP power plant (12MW).

The existing transmission lines at Binh Duong province are as follows:

No. Name of transmission line Conductor Length

1 220kV Double circuit Tri An - Binh Hoa T/L AC-400 37km

2 220kV Long Binh - Thu Duc T/L ACSR -795 18.3km

3 220kV double circuit Tan Dinh - Binh Hoa 2xAC-300 10.63km T/L

4 220kV double circuit Tan Dinh - My Phuoc AC-400 15.4km T/L

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220kV Song May - Uyen Hung T/L Summary Report of FS

5 220kV-110kV four-circuit Thu Duc - Long ACSR 18.3km Binh upgraded T/L 795MCM

6 220kV double circuit Tan Dinh - Trang ACSR 40km Bang T/L 795MCM

7 110kV Thu Duc - Song Than T/L ACSR- 10.9km 397MCM

8 110kV VSIP - Song Than T/L AC-240 7.2km

9 110kV Binh Hoa - VSIP T/L ACSR 5.3km 397MCM

10 110kV Binh Hoa - Go Dau T/L ACSR 7.4km 795MCM

11 110kV Thac Mo- Ben Cat- Hoc Mon T/L AC-185 165km

12 110kV Thac Mo - Tay Ninh T/L AC-185 268km

13 110kV Tri An - Dong Xoai T/L AC-185 129km

14 110kV Dau Tieng substation and double AC-185 2.5km circuit branch line

15 110kV Phu Giao substation and double AC-185 1.3km circuit branch line

16 110kV double circuit Binh Hoa - Tan Dong AC-240 7.5km Hiep T/L

17 110kV Tan Dong Hiep - Sunsteel T/L AC-185 2.2km

18 110kV Binh Hoa - Tan Uyen T/L AC-240 14.7km

19 110kV My Phuoc - Kumho T/L AC-400 4.8km

20 110kV Kumho - Ben Cat 1 T/L AC-400 3.9km

AC-185 1.5km

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220kV Song May - Uyen Hung T/L Summary Report of FS

21 110kV My Phuoc - Ben Cat 2 T/L AC-400 8.7km

AC-185 4.5km

22 110kV My Phuoc - Chon Thanh T/L AC-400 7.4km

AC-185 15.1km

2.2. Power source expansion planning and transmission line expansion planning Dong Nai province ’s electrical system

According to Dong Nai’s power network plan in 2005-2010 (up to 2015) approved by Ministry and Industry by letter No. 2984/QĐ-BCN dated on 23/9/2005, power source expansion planning and transmission line expansion planning is as follows:

Stage 2006-2010:

Substations:

- 500kV substations: new construction 500/220kV Song May substation (3x200MVA) (including 220kV substation - 1x125MVA) is supplied by sources of Phu My power plant.

- 220kV Xuan Loc substation: new construction 220kV Xuan Loc substation (1x250MVA) is supplied by sources of 500/220kV Song May substation.

- 220kV Long Thanh substation: upgrade from 1x250MVA to 2x250MVA.

- 110kV substations: new construction of 16 substations with capacity is 671MVA.

Transmission lines:

- New construction of 500kV Phu My - Song May transmission line

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220kV Song May - Uyen Hung T/L Summary Report of FS

- Construction of 220kV transmission line connecting with 220kV Tri An - Long Binh transmission line.

- Construction of 220kV double- circuit Nhon Trach - Nha Be transmission line.

- Construction of 220kV double-circuit Nhon Trach - Cat Lai transmission line.

- Construction of 110kV transmission lines such as: connection lines of 500kV Song May, Xuan Loc - Cam My, Xuan Loc - Dinh Quan, Tri An - Vinh An, Long Thanh - Nhon Trach industrial zone, Vinh An - Kiem Tan, Xuan Loc - Song May, Ong Keo - Sun Steel transmission lines.

- 110kV branch lines: 110kV Dau Giay, Bau Xeo, Tam Phuoc, SN. Long Thanh, Sub Steel, Quang Trung, Pou Sung, Dinh Quan 2, AMATA 2 substations.

- Upgrading of 110kV Long Khanh - Xuan Loc transmission line.

Stage 2011-2015:

Substations:

- 500kV substations: Upgrading of 500/220kV Song May substation from 3x200MVA to 2 (3x200) MVA.

- 220kV substations: New construction of 220kV Nhon Trach substation (2x250MVA) and Upgrading of 220kV Xuan Loc substation from 1x250MVA to 2x250MVA and 220kV Song May substation from 1x125MVA to 2x250MVA.

- 110kV substations: New construction of 11 substations with capacity is 440MVA and upgrading of 23 substations with total of capacity is 854MVA.

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220kV Song May - Uyen Hung T/L Summary Report of FS

Transmission lines:

- New construction of 110kV double circuit Cam My - Bau Can - Phuoc Binh - Go Dau transmission lines.

- 110kV branch line into 110kV Xuan Loc 2 substation.

- Upgrading of 110kV double circuit Long Thanh - Long Binh transmission line.

2.3. Power source expansion planning and transmission line expansion planning Binh Duong ’s electrical system

According to Binh Duong’s power network plan in 2005-2010 (up to 2015) approved by Ministry and Industry by letter No. 1821/QĐ-NLDK dated on 20/5/2005, power source expansion planning and transmission line expansion planning is as follows:

Substations:

- 220kV substations: new construction 220kV Uyen Hung substation is supplied by sources of 500/220kV Tan Dinh and 500/220kV Song May substations.

- 110kV substations:

+ 110/22kV Tan Uyen substation (upgrade from 1x40MVA and 1x63MVA transformers to 2x63MVA transformers (operation in 2008)

+ 110/22kV Nam Tan Uyen (2x63MVA) substation (operation in 2009) is supplied by sources of 500/220kV Tan Dinh and 220kV Uyen Hung substations.

+ 110/22kV Tan Thanh (1x63MVA) substation is supplied by source of 220/110kV Uyen Hung substation.

+ 110/22kV Hoi Nghia and Phu Giao 2 (2x63MVA) substations operation in 2012-2014 are supplied by source of 220kV Uyen Hung substation.

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220kV Song May - Uyen Hung T/L Summary Report of FS

+ Lien Hop 3 substation (2x63MVA) is supplied by source of 500kV Tan Dinh and 220kV Uyen Hung substations.

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220kV Song May - Uyen Hung T/L Summary Report of FS

220kV and 110kV transmission lines of Tan Uyen district - Binh Duong province up to 2015

110kV T/L 220kV T/L 500kV T/L 110kV Phu Giao 2 2x63MVA

(20011-2015)

110kV Tan Thanh 110kV Hoi Nghia 1x63MVA (2010) 2x63MVA (20011-2015)

220kV Uyen Hung (2010)

110kV Tan Uyen 2x63MVA (2008)

110kV Nam Tan Uyen

1x63MVA (2009)

500kV Tan Dinh 110kV T3 2x63MVA (2013-2014) 500kV Song May

110kV Bau Beo 220kV Binh Hoa 1x63MVA (2006)

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 3 LOCATION AND PROJECT SIZE

1.1. Location

The planning lines of 220 kV Song May - Uyen Hung transmission line will be built starting from Trang Bom district, Dong Nai province, ending at Uyen Hung town, Binh Duong province.

1.2. Project size

220 kV Song May - Uyen Hung transmission line is built with following specifications: - Rated voltage :220kV - Number of circuits :One-circuit, two-circuit, three-circuit One-circuit (length of 544.4 m)

Two-circuit (length of 15,277m)

Three-circuit (length of 6,401m) - Start point :220kV busbar of 500kV Song May substation. - End point :220kV busbar of 220kV Uyen Hung substation - Length of the line - :21,678 m Conductor :2xACSR 330/43 (for 220kV Song May - Uyen Hung T/L) : 1xACSR-400/52 (for 220kV connection line) - Overhead ground wire :Optical ground wire - OPGW186 (type 24 fibers) and overhead ground wire -PHLOX181.6”. - Insulator : 70kN, 100kN insulator disc for conductor suspension string; 160kN, 300kN insulator disc for conductor tension string. - Tower :G alvanized Steel towers. - Foundation : Steel concrete in - situ cast. - Earthing - 2.000 in every tower.

1.3. Scope of project

Scope of project is all of Song May - Uyen Hung transmission line from 220kV busbar of 500kV Song May substation at Bac Son commune, Trang Bom

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220kV Song May - Uyen Hung T/L Summary Report of FS district, Dong Nai province to end in 220kV busbar of 220kV Uyen Hung substation at Uyen Hung town, Binh Duong province.

1.4. The project area

A map of project area is presented below. The project covers an area from Trang Bom district, Dong Nai province to Uyen Hung town, Tan Uyen district, Binh Duong province.

Phu Giao district

Ben Cat district

Tan Uyen disctrict: Natural area: 613.4km2 Population: 117,700 people The district has 16 communes and 2 districts (Uyen Hung and Tan Phuoc Khanh towns)

Tan Uyen district

Uyen Hung town

Thu Dau Mot town

Figure 3.1 Map of project area in Binh Duong province

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220kV Song May - Uyen Hung T/L Summary Report of FS Figure 3.2 Map of project area in Dong Nai

Tan Uyen district

500kV Song May S/S

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 4 LOAD FORECASTING

The forecast of load demands of Dong Nai province is showed in table 4.1

Table: 4.1 Unit: GWh

Load Type 2010 2015 Agriculture - Silviculture - Aquiculture 24.6 32.9 Industry -Construction 4,776.6 9,485.7 Commerce - Hotel - Restaurant 288.3 669.1 Resident -Public Administration Offices 955.5 1,397.7 Other consumer Total 6,045.1 11,582.4

The forecast of load demands of Binh Duong province is showed in table 4.2

Table: 4.2 Unit: GWh

Load Type 2010 2015 Agriculture - Silviculture - Aquiculture 15.8 31.9 Industry -Construction 1,261.7 2,030.7 Commerce - Hotel - Restaurant 219.9 899.4 Resident -Public Administration Offices 1,034.7 1,935.8 Other consumer 188.8 536.3 Industrial zones 3,952.1 6,867.2 Total 6,672.9 12,301.3

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 5 TECHICAL SOLUTIONS

5.1. Transmission line

5.1.1. Line route alternatives

The alternatives of lines have basic characteristics as follows:

- Start point: 220kV busbar of 500kV Song May substation. - End point: 220kV busbar of 220kV Uyen Hung substation

220kV Song May - Uyen Hung transmission line from 220kV busbar of 500kV Song May substation at Bac Son commune, Trang bom district Dong Nai province to end in 220kV busbar of 220kV Uyen Hung substation at Uyen Hung town, Binh Duong province.

Alternative 1: The length of line route is 21.4km.

Alternative 2: The length of line route is 23.5km.

Alternative 3: The length of line route is 21.67km.

5.1.2. Comparison of line route alternatives

Based on the meeting with People’s Committee of Dong Nai and Binh Duong, line route is approved to run parallel with 500kV Song May - Tan Dinh transmission line in order to decrease land area affected and affected houses within right of way (ROW). Therefore, the alternative 3 is chosen.

5.1.3. Comment

Based on the above comparison of alternatives, alternative 3 is the most optimal. The line route of alternative 3 is chosen. The line route of alternative 3 goes through areas with features as follows:

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220kV Song May - Uyen Hung T/L Summary Report of FS

a) Trang Bom district ’s area: From start point ĐĐ1 to G0 section. - The line route from the start point near 500kV Song May substation to G0 is about 173,3m. The line goes on land to belong to Bac Son commune, Trang Bom district - Dong Nai province. There are not any affected houses within ROW in the route section. b) Vinh Cuu district ’s area: - The route of line from G0 to G1 is about 1,723.7m, the route runs parallel with connection line of 220kV Tri An - Long Binh transmission line. The route goes through Tan An commune, Vinh Cuu district - Dong Nai province. The line route goes across indigo, rubber trees. There are 6 houses in ROW. - The route of line from G1 to G2 is about 1,422.4m, the route goes through Tan An commune, Vinh Cuu district - Dong Nai province. The line route goes across cajuput., cashew tree, rice - field. There is not affected house in ROW. - The route of line from G2 to G3 is about 2,054.3m, the route goes also through Tan An commune, Vinh Cuu district - Dong Nai province. The line route goes across cajuput, rice - field. There are not affected houses in ROW. - The route of line from G3 to G4A is about 1,200.1m, the route goes also through Tan An commune, Vinh Cuu district - Dong Nai province. The line route goes across cajuput, rice - field. There is one affected house in ROW. - The route of line from G4A to G5B is about 190m, the route goes also through Tan An commune, Vinh Cuu district - Dong Nai province. The line route goes across rice - field. There is not affected house in ROW. -The route of line from G5B to G6 is about 2307.1m, the route runs parallel with 500kV Phu My - Song May transmission line. The line route goes across cajuput, rice - field, some agricultural produce, 220kV Tri An - Hoc Mon T/L, 110kV Tri An - Tan Hoa T/L and Dong Nai province. The line section goesTan An commune, Vinh Cuu district, Dong Nai province. It also goes through Thuong Tan commune, Tan

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220kV Song May - Uyen Hung T/L Summary Report of FS

Uyen district, Binh Duong province with length of 380m .There are 12 affected houses in ROW. c) Tan Uyen district ’s area: - The route of line from G6 to G7 is about 5,041.9m, the route runs parallel with new 500kV Song May - Tan Dinh transmission line. The route goes through Thuong Tan, Tan My communes, Tan Uyen district, Binh Duong province. The route goes across some cajuput, rice-field and rubber trees. There are 2 affected houses in ROW. - The route of line from G7 to G8B is about 654.9m. The route goes across rubber trees, some indigo trees. It goes Tan My commune, Tan Uyen district, Binh Duong province. There are no affected houses in ROW. -The route of line from G8B to G9 is about 875.1m. The route goes across some rubber trees. It also goes Tan My commune, Tan Uyen district, Binh Duong province. There are only one affected houses in ROW. -The route of line from G9 to G11 is about 3483.1m. From G9 to G10, the route runs parallel with exsiting 500kV Pleiku-Tan Dinh transmission line. The route goes across most rubber trees and some cajuput trees. It also goes Tan My commune, Tan Uyen district, Binh Duong province. There are no affected house in ROW. - The route of line from G11 to G12 is about 1912.9m. The route goes across most rubber trees. It also goes Tan My commune, Tan Uyen district, Binh Duong province. There are two affected houses in ROW. -The route of line from G12 to ĐC is about 577.3m. The line goes along with DH411 street and across most cajuput trees and then connect into 220kV Uyen Hung substation. The route goes through Uyen Hung town, Binh Duong province.

Table 5.1: Summary of the 220kV Song May - Uyen Hung tranmission line’s length and deviation angle.

No. From point to point Length Deviation angle Remark (m) 1 220kV Busbar of 31.5 500kV Song May substation 500kV Song May substation - ĐD1

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220kV Song May - Uyen Hung T/L Summary Report of FS

2 ĐD1 - G0 173.3 3 G0 - G1 1723.7 L 7º31'44", 4 G1 - G2 1422.4 R67º59'42" 5 G2 - G3 2054.3 L61041'43" 6 G3 - G4A 1200.1 L29016'59” 7 G4A - G4B 78.9 R77 052'11" 8 G4B - G5A 48 R14049'54" 9 G5A - G5B 63.1 L81053'22" 10 G5B - G6 2307.1 L 8º01' 29” 11 G6 - G7 5041.9 R28º11'46" 12 G7 - G8A 606.1 R31º09'54" 13 G8A - G8B 48 R6º58'27" 14 G8B - G9 875.1 L78043' 29" 15 G9 - G10 1596.8 L7º47' 30" 16 G10 - G11 1886.3 R8015’41” 17 G11-G12 1912.9 R1º50' 52" 18 G12 - ĐC 577.3 L36º41'46" 19 ĐC-220kV busbar 30.5 220kV Uyen Hung substation of 220kV Uyen Hung substation Total (m) 21,678

Table 5.2: Summary of the 220kV connection line’s length with 220kV exsting Tri An - Long Binh transmission line and deviation angle.

No. From point to point Length Deviation angle Remark (m) 1 220kV Busbar of 50 500kV Song May substation 500kV Song May substation - ĐD2 2 ĐD2 - G0 119.8 3 G0 - G1 1723.7 L 7º31'44", 4 G0 - G4A 6400.5 R10055’57” The same route as 220kV Song May - Uyen Hung line section 5 G4A - G4A1 76.6 R98033’03” 6 G34A1- G4A2 48 L5050’57” 7 G4A2 - G4A3 250 R2051’00” Total (m) 6,945

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220kV Song May - Uyen Hung T/L Summary Report of FS

110kV Tri An 500kV Pleiku

220kV Uyen Hung Sub. - Tan Hoa - Tan Dinh

22 ,6 16 ,5 15 ,8 54 ,2 37 ,0 L t.Ch i? n Khu D 43 ,0 27 ,4 40 ,8 c ao lanh 31 ,5 1415 ,1 53 ,4 1563 51 ,5 léi 42 ,6 45 ,3 10 ,5 20 ,5 35 ,5 G12 33 ,5 34 ,4 22 ,8 9 ,5 53 ,0 57 ,4 cao lanh 13 ,7 29 ,0 44 ,5 37 ,4 29 ,4 43 ,9 36 ,2 22 ,8 39 ,8 53 ,7 60 ,2 53 ,4 46 ,8 42 ,8 43 ,9 10 - 8 10 32 ,6 44 ,8 49 ,3 35 ,4 31 ,0 47 ,3 44 ,7 9 ,5 56 ,5 Đ C 43 ,5 37 ,7 37 ,9 39 ,8 24 ,0 1 ,4 6 ,6 26 ,2 26 8 ,5 44 ,5 L t.Ch iÕ n Khu D 39 ,5 47 ,8 31 ,5 26 c ? u R ? c h C ? t léi 44 ,2 48 ,4 38 ,5 58 ,2 9 ,6 18 -7 B T30 5 ,9 2 A 39 ,1 44 ,4 51 ,0 55 ,5 15 ,2 14 ,0 12 ,0 44 ,5 46 ,8 44 ,7 G11 40 ,8 2 ,0 49 ,3 36 ,7 14 ,5 49 ,1 12 ,3 46 ,5 44 ,0 41 ,0 7 ,8 59 ,5 46 ,2 G10 G9 41 ,6 39 ,3 62 ,0 54 ,6 21 ,0 45 ,7

42 ,2 G 31 ,9 43 ,6 37 ,2 20 ,5 11 ,4 53 ,7 8 ,5 12 ,0 25 40 ,7 44 ,7 12 ,7 49 ,0 1 ,4 1 ,4 R 29 ,8 25 29 ,1 9 ,2 13 ,5 50 ,4 61 ,5 64 ,2 41 ,5 25 16 ,4 12 ,4 33 ,0 8B 10 ,2 ? p 4 27 -8 9 ,0 G8A c ? u B ? G i?B T 30 31 ,5 25 51 ,0 2 ,0 8 ,3 8 ,4 31 ,5 8 ,5 59 ,8 11 ,3 29 ,0 12 ,8 51 ,2 10 ,7 9 ,8 10 ,2 54 ,0 26 ,8 17 ,0 G 1 2 48 ,5 36 ,6 ub 50 ,5 mi? u X ? m ? ? n 14 ,2 44 ,6 G 42 ,8 7 47 ,7 8 ,5 24 11 ,2 24 2 -4 25 -3 4 ,4 9 ,8 41 ,5 48 ,3 39 ,2 B T3 10 4 ,5 15 ,2 13 23 ,2 2 ,5 9 ,6 8 46 ,7 c ? u ? ng T ? ng 61 ,0 ,5 8 ,6 9 -8 8 ,8 B T30 53 ,1 54 ,5 miÕu 5 ,1 10 ,8 33 ,5 ,3 L ong ChiÕn 6 ,3 9 ,5 1025 21 ,5 - 0 ,3 98 99 00 3 ,7 01 02 5 ,6 03 2 ,5 8 ,4 04 06 07 08 8 ,5 09 10 8 ,5 1 ,4 11 12 10 ,7 13 14 15 5 ,6 16 ,0 05 9 ,5 22 ,0 6 ,3 50 ,5 56 ,0 38 ,0 65 ,3 mi? u B? 2 ,8 4 ,1 25 ,5 43 ,5 7 ,4 9 .0 23 5 ,3 2 ,4 13 ,5 7 ,7 24 -8 9 ,3 35 ,6 38 ,4 23 1 ,4 b ¬m 2 ,0 13 ,5 8 ,2 22 ,8 9 ,4 chî 24 -8 26 ,8 35 ,6 35 , ,3 7 ,0 38 ,5 6 ,5 6 ,9 B T25 c Çu C hïn Bao 9 ,5 8 ,3 Ub 3 ,5 15 ,2 24 ,0 16 ,5 31 ,3 6 ,5 28 ,2 T h¸i An 3 ,8 3 ,2 10 ,5 7 ,1

10 ,4 5 ,0 10 1 -B 8 ,4 34 ,8 9 ,6 7 ,6 23 ,4 27 ,2 c Çu R ¹ c h 4 ,6 Trè 3 ,4 11 ,5 14 ,0 49 ,5 mi? u B? 24 -3 7 ,6 45 ,0 25 14 ,8 11 ,4 12 s ©n 49 ,5 25 ,5 22 8 ,6 8 ,2 10 ,6 25 1 -B 6 ,5 22 49,8 4 ,7 7 ,8 4 ,5 3 ,8 8 ,5 21 ,3 6 ,7 8 ,9 17 ,2 55 ,1 56 ,2 9 ,4 B T1 2 - c Çu § ¹ i A n 47 ,0 Ch .B ? nh L ong 10 ,4 9 ,5 8 ? ? s 4 0 -4 30 46 ,0 Ub 1250 4 ,5 6 ,6 15 27 ,2 4 ,8 7 ,1 ,5 13 ,3 1 ,4 7 26 ,3 36 ,8 Mây ,6 500kV Song 10 ,3 10 ,6 10 ,5 10 ,2 ? ? n h B ? nh L ? i 2 ,7 4 ,5 29 ,5 9 ,3 19 - 8B T 25 15 ,3 11 ,5 49 ,2 11 ,8 5 ,6 26 ,3 ® ¸ ? ? 20 ,8 33 ,5 21 12 ,3 21 7 ,8 4 ,2 7 ,1 4 ,9 G6 5 --- Ta n Dinh ,5 9 ,7 7 ,4 17 ,5 59 ,1 59 ,4 5 ,3 16 ,8 22 ,2 26 ,4 52 ,2 18 ,2 6 ,2 25 6 ,6 5 ,5 L .s? 23 ,8 3 ,9 6 ,4 3 ,3 ? ? G5B 51 ,5 - 0 ,3 - 0 ,4 7 ,1 7 ,5 5 ,8 G 1 1 ub G4A.3 2 ,0 3 ,8 6 ,3 cÇu Bµ § Æng 4 ,5 ® ¸ 9 ,1 8 ,7 G5AG 1 0 B 4 ,7 10 ,8 9 ,4 3 ,8 55 ,5 lé i 5 ,2 ? .B ? nh L ? i 5 ,2 13 4 ,8 9 ,7 2 -B B T8 - G 4A.2 4 ,5 6 ,2 933 7 ,4 9 1576 22 ,0 20 3 ,8 7 ,3 Ub 6 ,8 8 ,1 9 ,5 G4A.1 6 ,9 15 ,4 6 ,5 1 ,3 6 ,4 10 ,4 20 b ? m - 0 ,4 2 ,5 9 ,2 10 ,6 10 ,8 7 ,1 7 ,4 G 8 ,2

3 ,2 B T 4 ,9 7 ,3 1 ,3 4B 8 ,2 ? p 2 47 ,7 5 ,7 6 ,2 24 -8 8 ,3 7 ,7 7 ,1 13 ,1 g ¹ ch 2 ,5 5 -3 8 ,3 18 -4 6 ,8 B T30 NM n −íc 7 ,5 g ¹ch G4A ? p 3 8 ,1 8 ,9 S 2 ,5 11 ,2 G 3 13 1 -B 8 ,8 13 ,1 7 ,3 6 ,2 c Çu R ¹ c h T «m B T 63 -8 5 10 6 ,1 ,9 29 -8 B T25 30 5 ,6 8 ,3 10 ,3 19 1 -B 19 Êp 3 3 ,1 9 ,5 19 ,8 7 ,0 c ? u R ? c h ? ? ng g ¹ ch 15 1 -B 5 5 ,7 6 ,2 Ub 7 ,5 11 ,1 8 ,3 ,8 13 1 -B 8 ,3 3 ,0 17,5 220 KV 3 ÑÖÔØNG DAÂY 220 kV TRÒ A N - HOÙC OÂN 7 ,4 5 ,6 ,9 23 ,2 8 ,4 g ? ch 4 ,4 12 ,8 T rg .C .N 4 ,8 B T12 -8 V 9 ,5 5 ,2 4 ,6 15 ,7 c ? ? i? n C .B öu S ¬n 12 9 ,5 G2 5 ,2 ? p 3 Êp 3 14 14 ,7 17 ,7 g ¹ 46 ,5 18 ,5 1 -B 2 ,5 ch 7 ,8 Truï soá c ? u T ? n Tr ¹ ch L .s ? 22 ,1 ®¸ 6 ,2 10 ,5 Êp 3 6 ,2

18 220kV Ub c h? 8 ,1 45 ,8 c ao lanh 9 ,7 30 6 ,9 18 3 ,7 ? .T ha nh 23 ,5 23 ,8 46,1 23 ,1 10 ,5 13 ,8 47 ,0 9 ,8 Ph ? An 52 ,1 49 ,0 38 ,5 g ¹ ch Tri X.N .giÇ y da tr ? i g ? 44 ,9 50 ,3 4 ,8 10 ,1 g ? ch 36 ,2 27 ,2 2248 7 ,2 X.N .b ª t« ng 45 ,9 924 ®ang sa n lÊp 37 ,5 17 ,9 o ng C ? T ? 14 ,4 55 ,1 5 ,3 53 ,8 --- H oc Mon 20 ,7 31 ,3 ? ? 31 ,5 53 ,8 12 ,5 17 ,2 19 ,3 32 ,7 21 ,4 40 ,4 10 ,7 5 ,8 3 , 10 ,9 55 ,3 61 ,0 G 9A bi? n36 h? a 40 ,2 p h − ên g Tr ¶n g D µi 487 04 50 ,1 487 26 ,6 t.p . bi ? n h? a 00 01 02 03 P h .T r? ng D? i 40 ,6 58 ,8 17 2 ,8 C-48 -3 4 -B -a x ? T? n B? nh x· T© n B×nh x· Th ¹n h Phó x ? Th ? n h P h ? P v ? n h c? u 31 ,8 V ? nh C? u Ê p 4 -2 km K.p h ? 4 - 220kV Tri An 8 G1 4 ,5 1 km t .p .b i? n h? a 28 ,2 17 17 ,2 25 C - 4 8 -2 2 - D - c 98 X.N . èc vÝt 99 0 ,3 km ? p 4 - 1 ,2 km 10 ,8 34 ,6 54 ,1 18 ,6 ,6 12 ,3 x ? Th i? n T? n x ? T? n A n 41 ,7 0 ,8 10 ,8 51 ,7 ,7 km ch ? a B ? nh Y 0 ,2 km 98 99 12 ,8 487 24 ,20 27 ,2 01 02 03 487 04 46 ,3 53 ,5 51 ,2 --- 15 ,9 Lo 22 ,6 42 ,7 17 ,2 50 ,2 23 ,4 4 ,9 1723 K .ph ? 50 43 ,3 32 ,8 38 ,9 42 ,9 40 ,1 38 ,3 44 ,4 49 ,2 ng Bin h 40 ,3 50 ,7 30 ,4 9 ,5 47 ,6 16 ,9 2 ,8 16 25 ,7 21 ,2 42 ,6 2003 theo c? c t? i li ? u: 1 ,5 ? o b ? i ? ? o b ? i 27 ,8 16 50 ,5 Ub in n ? m 1 99 6,1 99 7 32 ,1 36 ,7 13 ,8 ? ng H ? i 2 ? ? ng H ? i 2 14 ,3 19 ,2 46 ,1 10 ,3 1 ,3 40 ,0 7 ,5 3649 n ? m 2 0 02 . 33 ,8 K .p h ? 43 ,6 10 10 ,4 34 ,1 32 ,3 4 ,3 G0 53 ,4 500kV Song May

Figure 5.1: 220kV Song May - Uyen Hung transmission line route (Alternative 3)

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220kV Song May - Uyen Hung T/L Summary Report of FS

5.1.4. Transmission line layout

5.1.4.1 General

5.1.4.1.1 Climatic conditions

Climatic conditions are as follows:

Air temperature:

Minimum air temperature 15oC Yearly average air temperature 30oC Maximum air temperature 40oC Air temperature at maximum wind velocity 25oC Air temperature in thunder 20oC

Wind pressure:

The design maximum wind pressure at 10 m elevation is 60 daN/m2 Atmospheric conditions:

Average humidity : 80%

Pollution level:

The pollution levels in accordance with IEC is: 2.0cm/kV

5.1.4.2. Conductors

Conductors for 220kV Song May - Uyen Hung transmission line are used ACSR 330/43.

Cross-section: + Aluminum :332m2 + Steel :43.1mm2 + Total :375.1mm2 Calculated diameter :25.2mm Weight (total) :1.255 kg/m Rated tensile strength (RTS) :103,784N Elastic module :7,034daN/mm2

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220kV Song May - Uyen Hung T/L Summary Report of FS

Heat elasticity coefficient :19.3x10-61/0C

Conductor for 220kV connection line to 220kV Tri An - Long Binh Line are used ACSR 400/52.

Cross-section: + Aluminum :400m2 + Steel :51.9mm2 + Total :452m2 Calculated diameter :27.6mm Weight (total) :1.510 kg/m Rated tensile strength (RTS) :12300daN Elastic module :7,034daN/mm2 Heat elasticity coefficient :19.3x10-61/0C

5.1.4.3. Earthwires

Earthwire for 220kV Song May - Uyen Hung transmission line is used PHLOX 181.6:

Cross-section :181.63mm2 Calculated diameter :17.5mm Weight (total) :975 kg/km Rated tensile strength (RTS) :16024daN Elastic module :12,400daN/mm2 Heat elasticity coefficient :14.2x10-61/0C

5.1.2.4. Overhead Ground Wire Fiber (OPGW) OPGW for 220kV Song May - Uyen Hung transmission line is OPGW186 with fibre in accordance with ITU-T G.652 (24 fibers).

5.1.2.5. Insulators

The suspension and tension insulator string units shall be of the cap and pin type and shall comply in all respects with IEC 60305, IEC 60383 and IEC 60120. Insulator units shall be of glazed porcelain or tempered glass type.

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220kV Song May - Uyen Hung T/L Summary Report of FS

5.1.4.6. Tower Towers are used steel lattice tower type for 1 circuit, 2 circuits and 3 circuits.

5.1.4.7. Foundation

Foundations are designed to be suitable for the ground conditions. Foundation type which is recommended for 220kV Song May - Uyen Hung transmission line is individual footing foundation.

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 6 PROJECT EXECUTION

10.1. Project management

d) Investor: National Power Transmission Corporation (NPT)

e) Project management: Southern Viet Nam Power Project Management Board on behalf of EVN manages to carry out the project.

f) F/S carried out by Power Engineering & Consulting J.S Company No. 1 (PECC1).

g) Technical design carried out by Power Engineering & Consulting J.S Company No.3 (PECC3).

10.2. Working progress

Working progress of the project is planned as follows.

- FS report and approval: 04/2009

- Technical design and approval: 08/2010

- Bidding documents for procurement of goods 02/2011

- Putting in operation: 12/2012

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220kV Song May - Uyen Hung T/L Summary Report of FS

CHAPTER 7

PROCUREMENT OF GOODS AND REFUNDING THE BUDGET

11.1. Package of bidding documents

h) Package No.1: Supply of steel tower

i) Package No.2: Supply of conductors and overhead ground wires

j) Package No.3: Supply of insulators and Accessories

k) Package No.4: Supply of optical ground wire (OPGW) and fittings

l) Package No.5: Construction of 220kV Song May - Uyen Hung T/L.

m) Package No.6: Transport equipment and materials.

11.2. Planning progress of refunding the budget

220kV Song May - Uyen Hung transmission line is planned refunding the budget in two years after the beginning of project.

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220kV Song May - Uyen Hung T/L Summary Report of FS

ANNEXES

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