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LIST OF NEW TRANSMISSION CAPACITIES AND INTERCONNECTION LINES (2014-2023)

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Table of contents

ABBREVIATIONS ...... 3 Foreword ...... 4 1. Current capacities of the transmission network – 2013 ...... 4 2.1 Current capacity of transmission lines ...... 6 2.2 Current transformation capacities ...... 7 2.3 Current capacity of power exchange with the neighbouring countries ...... 8 2. Development of new transmission network capacities 2014-2023 ...... 12 2.1 Transmission line capacity – configuration 2014-2023 ...... 15 2.2 Development of transformation capacities 2014-2023...... 17 2.3 Interconnection line capacities 2014-2023 ...... 19 3 Regional developments of transmission systems ...... 23 3.1 Introduction ...... 23 3.2 Long-term projects in the South-East European Network ...... 25 Bibliography ...... 28 ANNEX A Technical data of South-East Europe’s interconnection lines ...... 29

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ABBREVIATIONS

KOSTT – Transmission, System and Market Operator j.s.c.

KEK – Kosova Energy Corporation j.s.c.

KEDS – Kosova Company for Distribution and Supply with Electricity j.s.c. (KEDS j.s.c)

SEE – South East Electricity System

DSO – Distribution System Operator

ERO – Energy Regulatory Office

ENTSO/E – European Network of Transmission System Operators for Electricity

TDP – Transmission Development Plan

SECI – South East Cooperative Initiative (Regional transmission planning project)

KNTI (SITC)- Simultaneous Interconnection Transmission Capacity

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Foreword

Transmission network is one of the three main pillars of the Kosova Electricity System. Generation, transmission and distribution are the three main basic components of modern electricity systems. The duty of the transmission network include bulk transmission of electricity generated by generators of the system or cross border lines, at long distanced up to distribution nodes with a high reliability, quality and efficiency. Based on TSO license Article 11.2, the Transmission System Operator shall, every two years, develop a list of new interconnection transmission capacities and lines, and shall act in line with ERO instructions and relevant provisions of the applicable legislation in Kosova. This document, which covers a period from 2014-2023, is based on the Transmission Development Plan (2014-2023) of the Republic of Kosova. The Document contains list of actual transmission network capacities, and plans for new transmission capacities and interconnection capacities. The Document also includes data on actual capacities of interconnection lines of transmission systems of Southeast Europe countries as well and long term development plans for new interconnection capacities.

1. Current capacities of the transmission network – 2013 Kosova transmission network operates with three high voltage levels, 400kV, 220kV, and 110kV, and two medium voltage levels, 35 kV and 10(20) kV. The transmission system of the Republic of Kosova is interconnected, through cross border lines, with four neighboring countries: , Macedonia, and . In the regional aspect, Kosova transmission system plays an important role in transactions of electricity trades developed in the region. Powerful horizontal network, particularly the 400kV one, strong interconnection with neighboring countries determines the important role of our system in the electrical energy aspect. Figure 1-1 indicates the unipolar scheme of the electricity system in Kosova as per the recent situation in end 2013. Currently, very high volumes of electricity are transferred through horizontal network, which is around 50% of annual consumption of Kosova. The largest amount of energy flows through the 400 kV lines, as a result of common exchanges of the region, from north to south. To have a clearer overview of the transmission network capacity of Kosova, a separate assessment is

LIST OF NEW TRANSMISSION DT-PA-003 CAPACITIES AND INTERCONNECTION LINES 2014-2023 ver. 1.0 Page 5 to 33 Office; Development and Long Term Planning made of the horizontal network capacity and the network capacity to supply the internal consumption. Horizontal network capacity has an impact on imports, exports and transits of energy flows, however its impact is not significant in the internal network capacity based on the particular configuration of Kosova Power System, particularly that of 400 kV. In reference to the TDP 2014- 2023, internal transmission capacity for the current year 2013 is: . 1500 MW according to the N criterion of system operation (will all elements in operation) . 1080 MW according to the N-1 criterion

Figure 1-1 shows N and N-1 (internal) network capacity developments, in relation to the seasonal load for the period Q1/2011-Q1/2014. Operation in normal network conditions has improved considerably and provides for a sufficient security margin, however criterion N-1 is insufficient for certain parts of the network.

Figure 1-1 Development of internal transmission network capacities from Q1-2011 to Q1-2014

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2.1 Current capacity of transmission lines

Table 1-1 and Figure 1-2 indicate the transmission lengths and capacities for the existing transmission lines of Kosova, based on the end 2013 situation. Transmission Capacity Ct represents the amount for all generation lines of nominal thermal capacity of each line separately. This amount is defined in the Grid Code, which estimates the transmission capacity for 400kV, 220kV and 110kV lines.

Tab. 1-1 Lengths of transmission lines and their transmission capacity Overhead lines Total length in Kosova Transmission Capacity Ct=Sn*L 2013 [km] [MVA km] 400kV 188.496 248249.23 220kV 231.83 77418.3 110kV 802.67 91775.75

Data from table 1-1 illustrated in the diagram are as shown in figure 1-2

1000 300000 Transmission Capacity MVA*km Line length 900 248249 250000 800

700 200000 600

500 150000

400 91776 100000 300 77418

200 50000 100

0 0 400 220 110

Fig. 1-2: Graphical illustration of data from table 2

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Figure 1-2 shows that the earlier concept of the Kosova transmission network was developed towards increasing exporting capacities, with no due care given to the increase of transmission capacities for internal consumption needs. It can be seen from the diagram that the 400 kV network capacities are very powerful, whereas 220 kV network capacities are slightly lower than 100 kV network capacities. Comparing the 110 kV network capacities for the current year (9177.75 MVA*km) an for 2008 (65845 MVA*km), a conclusion can be drawn that the 110 kV network has been strengthened satisfactorily (39.3%)

2.2 Current transformation capacities Current transformation capacities of the transmission network managed by KOSTT are mainly installed in 400/220 kV, 400/110 kV and 220/110 kV substations, 220/TM kV and 110/TM kV. Highest transformation capacity is installed in SS Kosova B 400/220kV. Three nominal power autotransformers of a nominal power of 400MVA have been installed in this substation. Total transformation capacity of this substation is 3*400 = 1200MVA - In SS 3, 400/110 kV there is only one transformer installed with a nominal power of 300 MVA. - In SS 2, 400/110 kV there is also one auto-transformer installed with a nominal power of 300 MVA. - In SS Kosova A, 220/110 kV there are three auto-transformers installed with a nominal power of 150 MVA with a total transformation capacity 450 MVA. - In SS Prishtina 4, 220/110 kV there are three auto-transformers installed with a nominal power of 150 MVA, with a total transformation capacity 450 MVA. - In SS Prizreni 2, 220/110 kV there are three auto-transformers installed with a nominal power of 150 MVA, with a total transformation capacity 450 MVA. - Substations 110/TM kV and 220/TM kV have 1837 MVA installed (excluding transformers in Feronikel, Trepça, Sharr and Ujman).

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Table 1-2 show transformation capacities for the transmission network of Kosova, according to the network configuration Q4-2013.

Tab. 1-2 Current Transformation capacities in the transmission network, Q4-2013 Transformers 2013 No. Transformer Capacities 400/220 kV NS Kosova B 3 1200 MVA 400/110 kV NS Peja 3 1 300 MVA NS Ferizaj 2 1 300 MVA 220/110 kV NS Kosova A 3 450 MVA NS Prishtina 4 3 450 MVA NS Prizreni 2 3 450 MVA 110/35 kV , 110/10 kV 51 1757 MVA 220/35/10 kV, 220/10 kV 2 80 MVA Total Auto-transformer 14 3150 MVA Total Transformer 53 1837 MVA

2.3 Current capacity of power exchange with the neighbouring countries

NTC1 (Net Transfer Capacity) of interconnection lines in Kosova depends on the regional electricity balance in the neighbouring countries and limitations in the regional horizontal network which may appear in various operation regimes. The interconnection capacity calculation is done through the PSS/E software, based on long-term forecasts of demand and generation for the regional countries, in relation to development plans of regional transmission systems. The procedure to calculate the NTC in KOSTT is based on general rules of ENTSO/E which fit with characteristics of the regional transmission system where the transmission network of Kosova is interconnected.

1 NTC - is the maximal total of electricity exchange between to controlling areas, in line with applicable security standards of all regulated areas and taking into consideration technical uncertainties of the network. (Definition extracted from the manual of ENTSO-E).

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Table 1-3 shows current interconnection line capacities according to their natural power (P), NTC and nominal thermal power (Stherm).

Table 1-3. Current capacities of interconnection lines Systems and Interconnection Voltage Natural Thermal NTC lines level power ratings Kosova- Serbia 600 MW SS Kosova B- SS Nis 400 kV 500 MW 1317 MVA SS Podujeva – SS Krusevc 220 kV 120 MW 300 MVA Kosova - Macedonia 400* MW SS Ferizaj 2- SS Shkupi 5 400 kV 500 MW 1317 MVA Kosova - Montenegro 400* MW SS Peja 3 – SS Ribarevina 400 kV 500 MW 1317 MVA Kosova – Albania 210* MW SS Prizreni 2 – SS Fierza 220 kV 120 MW 300 MVA

*From https://www.entsoe.eu/fileadmin/user_upload/_library/ntc/archive/NTC-Values-Winter-2011-2012

Simultaneous Interconnection Transmission Capacity (SITC) is different from that of NTC, and is calculated for both:

. When the electricity system simultaneously imports from all interconnections (in different time periods), until the first limitation appears in the horizontal network for the importing country and the exporting countries (for criterion N-1). . When the electricity system simultaneously exports from all interconnections (in different time periods), until the first limitation appears in the horizontal network for the exporting country and the importing countries (for criterion N-1).

Natural flows in the interconnection lines represent flows determined from the system impedance, generation location and the load when individual systems are balanced (without exchanges). Natural flows are amongst the first factors which have an impact in various simultaneous of the interconnection for the case of import and export.

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Simultaneous Interconnection Transmission Capacity is not calculated as total of the Net Transfer Capacity (NTC) and as such is significantly lower2.

Currently SITC of the Kosova transmission system is around 900 MW for power imports, and 1000 MW for exports. Taking into account the projected electricity balance, it can be considered that current interconnection capacities are very powerful and enable any exchange program for the needs of Kosova’s power system.

2 ENTSO/E Report: System Adequacy Forecast 2009-2020

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KOSOVA POWER SYSTEM - 2013

Fig. 1-3 Single line diagram of ES of the Republic of Kosova in the current configuration 2013

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2. Development of new transmission network capacities 2014-2023 Based on the Grid Code and its legal obligations, KOSTT shall develop an annually revised Transmission Development Plan TDP 2014-2023 approved by ERO, which shall include a list of reinforcement projects in the transmission network for the next 10 years. Table 2-1 shows ongoing projects whereas table 2-2 shows projects to reinforce Transmission network capacities as per TDP 2014-2023. Table 2-3 provides a list of projects in the load supporting category.

Tab. 2-1. Ongoing projects and projects in a tender phase No Project name ( in process of realisation ) Year 1 Transformer TR2, 40 MVA,110/10(20) MVA in SS 2015 2 Transformer TR2, 40 MVA,110/10(20) MVA, in SS Burimi 2015 3 Transformer TR3, 40 MVA,110/10(20) MVA ne SS Prishtina 2 2015 4 Conductor replacement 110 kV, L125/2 and L125/3 (Vushtrri 1-Trepça-Valaq) 2015 5 Interconnection 400 kV line SS Kosova B - SS 2 2016

Table 2-2 List of planned projects for reinforcement of transmission 2014-2023 Nr Project name from TNDP 2014-2023 Viti 1 Installation of second transformer 31.5 MVA in SS Berivojce 2015 2 Installation of second transformer 31.5 MVA in SS Viti 2015 3 AT2-300 MVA in SS PEJA3 and SS FERIZAJ 2 2016 4 New 110 kV line SS Peja 3- SS Peja 1 and refurbishment of NS Peja 1 2016 5 Refurbishment of 110 kV line : L126/2 SS Peja 2- SS 2016 6 Installation of second transformer 40 MVA in SS 2016 7 New 110 kV line SS Rahoveci – SS Theranda 2018 8 Refurbishment of 110 kV line: L163/1 2019 9 Refurbishment of 110 kV line: L179/1 NS Prizreni 1 - NS Prizreni 3 2020 10 Refurbishment of 110 kV line: L155/2 & SS Leposaviq 110/10 kV 2020 11 New 110 kV line SS 1- SS Prizren 2 2021 12 Installation of second transformer 40 MVA in SS Gjilani 5 2022 13 New 110 kV line SS Peja 3- HPP Ujmani 2022 14 Packet Project Ring 400 kV: SG -SS Prizren 2_SS Ferizaj 2 2024

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Table 2-3 List of planned projects to support the load 2014-2023 No Project name ( load support) Viti 1 SS Mitrovica 2 with 110 kV lines 2017 2 Packet Project Prishtina 6 with double circuit 110 kV underground cable 2017 3 SS Dragashi and 110kV lines SS Kukёs-SS Dragash- SS Prizren 2 2018 4 Project SS Malisheva with 110 kV lines 2018 5 Project SS Fushë Kosova 2018 6 Project NS Drenasi 2 2019

The implementation of the projects included in the TDP 2013-2023 will enable a significant increase of the internal transmission capacities which would create favorable conditions for supply of consumptions.

Implementation of projects as per TDP 2014-2023 will enable continuous development of internal capacities of the network which will create favourable conditions for consumption supply. Reinforcements in key nodes SS Peja 3, SS Ferizaj 2 and SS Prizren 4, reconfiguration of the 400 kV and 110 kV network with the development of new 110 kV lines are the main factors that influence the capacity building of the transmission network. Figure 2-1 shows a diagram of the development of internal network capacity in relation to the development of the load for the next 10 years under three peak development scenarios.

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Figure 2-1. Development of internal capacities in the network in relation to the development of the load for the next 10 years

In the next 10 years, the horizontal network will have increased capacities as a result of the construction of 400 kV interconnection line SS Kosova B - SS Tirana 2, as well as the construction of 400 kV ring in Kosova. The interconnection line capacity of transmission network will be much higher than the needs for imports, or opportunities for exports of electricity that our country would have in the next 10 years and considering the significant volume of transit flows (KOSTT network) for the needs of the regional countries.

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2.1 Transmission line capacity – configuration 2014-2023

Table 2-4 shows the length and transmission capacities for the length of lines corresponding to 2023. Lines Total length in Transmission capacity 2023 Kosova Ct=Sn*L 400 kV 362 km 476749 MVA*km 220 kV 241 km 80091 MVA*km 110 kV 976 km 114160 MVA*km

Table 2-4 Length of transmission network lines and their transmission capacity for network configuration in 2023

Comparison of data in table 1-1 and 2-3 shows: . Capacity increase Ct[ km*MVA] of lines kV by 92% . Capacity increase Ct[ km*MVA] of lines 220 kV by 3.45% . Capacity increase Ct[ km*MVA] of lines 110 kV by 24.4%

Transmission Capacity MVA*km Line length km

Figure 2-2 Graphical presentation of data in the table 2-4

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Figure 2-2 indicates an increase of transmission capacities in 400 kV lines by 92% compared to 2013. This increase will occur as a result of the construction of 400 kV line between Kosova and Albania, as well as the construction of 400 kV ring by 2023. Compared with 2013, there is an increase of 24.4% of the transmission capacity in 110 kV lines, as a result of the construction and replacement of conductors in 110 kV lines. In strategic objectives of KOSTT, the 220 kV network is not expected to be further developed, except if optimal solutions are not found, such as the case of the planned construction of 4.5 km dual line to supply 2, 220/35/10 (20) kV. Hence, transmission capacity of 220 kV lines in 2019 will see a slight increase of 3.45%. Figure 2-3 presents capacities and lengths of HV lines for the next 10 years.

L 400 kV L 220 kV L 110 kV L 400 kV-km L 220 kV-km L 110 kV-km

Fig. 2-3 Development of transmission capacities for the next 10 years according to TDP 2014-2023

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2.2 Development of transformation capacities 2014-2023

The continuous increase of the load on one side, and the fulfilment of technical criteria deriving from the Grid Code on the other are the main factors in increasing transformation capacities in relevant time sequences, as stipulated in the TDP 2014-2023. The first consolidation phase of the transmission network has ended with the completion of projects: SS Peja 3, line L112, auto-transformer 150 MVA in SS Kosova A. Second reinforcement phase of the transmission network, which increased the reliability and security of the network from the N-1 criterion aspect, was completed after the implementation of the project SS Ferizaj 2, connection of SS 5, installation of additional auto-transformers 150 MVA in SS Prishtina 4 and SS Prizren 2 and connection of SS Lipjan in the 110 kV- L112 line. In SS Ferizaj 2, 400/110kV and SS Peja 3, 400/110kV by end of 2016, second 300 MVA auto-transformers will be installed. Transformation in the 400/220 kV and 220/110 kV levels will be unchanged for the next 10 years. With the transfer of 110/MV kV assets from DSO to KOSTT, the received transformation capacity impacted a higher total capacity managed by KOSTT. In the next ten years, in the level of 110/MV kV substations, there will be an increase of transformation capacities for 674.5 MVA, impacted by the plan to install 18 transformers with a 40 MVA, 31.5 MVA power. Total transformation capacity in substations 110/MV kV by 2023 will be 2431.5 MVA. By end of 2019, with the development of SS Drenasi 220/35/10(20)kV with a capacity of 2x40 MVA, there will be an increase of transformation capacity in the level 220/10(20)kV also for 80 MVA, total 160 MVA. The following table shows the development of transformation capacities for the next 10 years.

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Tab. 2-5 Installed transformation capacities by voltage level and number in the transmission network by 2023 Power Transformers No. Transformer 2023 Capacity 400/220 kV SS Kosova B 3 1200 MVA 400/110 kV SS Peja 3 2 600 MVA SS Ferizaj 2 2 600 MVA 220/110 kV SS Kosova A 3 450 MVA SS Prishtina 4 3 450 MVA SS Prizreni 2 3 450 MVA 110/35 kV, 110/10 kV 69 2431.5 MVA 220/35/10 kV, 220/10 kV 4 160 MVA Total Auto-transformer 16 3750 MVA Totali transformer 73 2591.5 MVA

Figure 2-4 shows the development of transformation capacities according to the relevant year (2014-2023) which corresponds to 2-5.

Figure 2-4 Development of transformation capacities for the next 10 years according to TDP 2014-2023

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2.3 Interconnection line capacities 2014-2023

The first chapter of this document describes the current interconnection capacity of Kosova’s transmission system as very powerful capacity in relation to the electricity system demands for power imports and exports. The Generation Adequacy Plan 2013-2022, describes planned and potential developments in generation which must be supported with new transmission network capacities in order for the generation and system adequacy are fully coherent with each other. Kosova interconnection capacity is strongly affected by regional network developments. Power flows in lines and transformers are subjected to Kirchhoff's laws and power balances of each system separately. TDP (2014-2023) shows the developments in the interconnection network, whereby interconnection capacity increases for the transmission system in Kosova is shown with the development of the 400 kV line, 2x490mm2, between Kosova and Albania is expected to enter into operation by 2016. Optional projects (after 2025) also include the second 400kV line Kosova – Macedonia, the implementation of which relies on Kosova’s generation developments and regional energy market developments. The period of the project’s implementation is only tentative, as there is no detailed feasibility study. In addition, TDP (2014-2023) also shows the option of the annular configuration of the 400 kV network (shown in Figure 2-6) the implementation of which depends on the level of installed generation capacities in Kosova for the future long-term period. A study carried out by the German consultancy company “FISHNER” (2010) in relation to the future configuration of the 400kV and 110kV network the future network development for the upcoming 15 years. In this study, the annular configuration of the 400kV network starts after 2023. Table 2-6 shows Kosova’s transmission system interconnection line capacity. The last column of this table shows the average NTC between Kosova’s and neighboring countries’ Transmission Systems.

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Table 2-6. Interconnection capacities of the Kosova transmission system in 2023 Systems and Interconnection Voltage Natural Thermal NTC lines level power ratings Kosova- Albania 700 MW SS Kosova B – NS Tirana 2 400 kV 500 MW 1317 MVA SS Prizreni 2 – NS Fierza 220 kV 120 MW 300 MVA Kosova – Serbia 600 MW SS Kosova B- SS Nis 400 kV 500 MW 1317 MVA SS Podujeva- SS Krusevc 220 kV 120 MW 300 MVA Kosova - Macedoni 400* MW SS Ferizaj 2- SS Shkupi 5 400 kV 500 MW 1317 MVA Kosova - Montenegro 400* MW SS Peja 3 – SS Ribarevina 400 kV 500 MW 1317 MVA

Figure 2-5 shows the development of KNTW for the next 10 years in relation to planned generation adequacy Simultaneous Interconnection Capacity for electricity export in 2023 will be around 1500MW, and around 1400MW for imports. If the second interconnection 400kV line is developed with Macedonia, then SITC will be significantly higher.

SITC Export [MW] SITC Import [MW] GA=RC-ARM (Conservative) GA=RC-ARM (Base) Fig. 2-5 Development of Simultaneous Interconnection Transmission Capacity (SITC) in relation to generation adequacy for the next 10 years

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Figure 2-6 shows the long-term vision of 400 kV network development based on the optional ideas of TDP 2014-2023, whereas Figure 2-7 shows the single line diagram of Power System in VIZIONI2023.VIZIONI AFATGJAT AFATGJATË I ËZHVILLIMITI ZHVILLIMIT TE TE RRJETIT RRJETIT 400kV 400kV GA=RC-ARM (Conservative) GA=RC-ARM (Base) LEGENDE SS 400/220 kV SS 400/110 kV SS 220/110 kV L400 kV L 400 kV L 220 kV L 22L0 k1V10 kV L 220 kV-km L110 kV Planned 400 kV line Planned 220 kV line Planned 110 kV line HPP TPP

SSH 400SSHkV 400kV

Dragashi Dragashi

Fig. 2-6 Long-term vision of Kosova’s horizontal network development 2014-2023

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KOSOVO POWER SYSTEM - 2023

Fig. 2-7 Overview of Kosovo Power System based on TDP 2014-2023

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3 Regional developments of transmission systems

3.1 Introduction The planning process of the transmission network of each country in the region is determined from the electricity demand forecast and generation capacity development. No Southeast Europe country has generation capacities to meet consumption; therefore a large number of them are dependent on electricity imports. Currently, the highest demands for imported electricity exist in Greece, , Croatia, Hungary, Albania, Kosova and Montenegro. However, all these countries have their own plans for construction of various generation capacities, depending on their primary energy sources. In the longer term, beyond 2020, Kosova is potentially expected to be an electricity exporter, based on its significant quantities of primary energy lignite-based resources [x-y]. The current transmission infrastructure in Southeast Europe will not meet the technical criteria for the future 10 year period, if new capacities are not developed (lines, substations). The Transmission network in the South-East Europe region is not as dense as the other part of the continent’s network. As seen in the electrical map in Figure 3-1, new required projects to increase the import and export capacities between the South-East Europe and the Central Europe are presented. Main reasons for perspective developments include: . Contribution in the electricity market integration in the region. . Reinforcement of the network to accommodate new conventional generation capacities and to increase interconnection capacities to enable the increase of interstate exchange volumes. . Accommodation of future renewable energy sources. . Potential expansion of the synchronized area to the East (integration of , etc.).

Dominant power flows in the South-East Europe region are mainly towards the North- South and East-West wings. These flows are subjected to the power balances and the market price of each individual country. The Block containing Greece, Macedonia, Albania and Kosova, is a

LIST OF NEW TRANSMISSION DT-PA-003 CAPACITIES AND INTERCONNECTION LINES 2014-2023 ver. 1.0 Page 24 to 33 Office; Development and Long Term Planning block of countries with largely negative balances in certain periods (seasons). Imports of the aforementioned countries are mainly realized with countries which have a positive balance, and export power surpluses; such countries commonly are , Rumania and Ukraine and, depending on hydrological conditions, Bosnia and Hercegovina as well. Importing countries on one side, and exporting countries, on the other, dictate a north to south power flow. Identified limitations to the region’s horizontal network with dominant power flows hinder market integration, which is the main incentive to develop mid-term and long-term projects to reinforce the network. These encouraging factors are mainly identified in the Northern boundaries of the region and in the Southern part, as indicated in Figure 3-1.

Investments are required in the mid-term to develop new generation capacities in Bulgaria, Greece, Croatia, all planned by each individual country. These generation investments will consequently determine the need to reinforce the horizontal network, particularly to increase the interconnection capacities of the region with the electrical energy system of Italy, in order to penetrate to the Italian and the western European countries’ market. In the longer term, the region expects development projects in building new generation capacities, most significantly in Kosova, Bosnia and Herzegovina, Romania and Albania. These developments shall encourage investments in new interconnection capacities between the region and Italy. In the mid-term period, integration of renewable energy integration, with a special emphasis in Italy, Greece and Romania is also an incentive for investments in the horizontal network. These countries currently have the highest number of integrated wind generator capacities. In the long-term period, many other countries have planned to integrated large wind generator capacities, such as Bulgaria, Romania and Albania. In terms of expanding the synchronized area to the east, this requires investments in the Bulgarian and Greek networks, in order to enable the integration of Turkey, Moldavia and Ukraine with the synchronized European area. These projects can also increase the power flows from East to West as shown in Figure 3-2.

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3.2 Long-term projects in the South-East European Network

A considerable number of long-term projects for the reinforcement of interconnection and internal network capacities in the South-East Europe have been planned. 400 kV Interconnection line between Pancevo (Serbia) and Resita (Romania), is expected to have an impact in increasing the transferring capacity in the direction East-West. The DC line between Italy-Montenegro is a project which is expected to start its development in 2014, and expected to be operational by 2016. There is also another new dual interconnection line project between Cirkovce (Slovenia) and Pince (Hungary) with the aim of enhancing the interconnection capacity between the two countries. With a view to create an additional corridor to evacuate planned generation surpluses of Bosnia and Herzegovina and Montenegro to Italy (through an underwater DC cable) a 400 kV interconnection line Visegrad (B&H) - Plevlja (Montenegro) has been planned and expected to be operational by 2020. Two important interconnection line projects encompassing three regional countries – Kosova, Albania and Macedonia – are in the inception phase. The second 400 kV line Kosova B (Kosova) – 5 (Macedonia) and 400 kV line Bitola (Macedonia) – Elbasan (Albania) are long- term projects which will create an additional corridor for the Italian and European market. Projects will be encouraged by the generation developments in Kosova, Bulgaria, and Romania, and electricity demands in the region and beyond. Figure 3-3 shows the electrical map of ENTSO/E, the part of the South-East Europe network, indicating the current horizontal network and planned interconnections in the mid-term and long-term period.

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Figure 3-1 Map of common electricity flows and transfer capacities between zones. (Source of information: www.entsoe.eu)

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Demand Increase Power flow direction changes

Future new generation capacities Island Systems which will be connected

Existing generation capacities System Reliability Issue

Generation decommissioning Aging of HV equipments

Non adequate generation capacities Power flow direction

Figure 3-2 Map of long-term investments in the transmission network of the South-East Europe

LIST OF NEW TRANSMISSION DT-PA-003 CAPACITIES AND INTERCONNECTION LINES 2014-2023 ver. 1.0 Page 28 to 33 Office; Development and Long Term Planning

Fig. 3-3. ENTSO/E map, section of the South-Eastern Europe Network with mid-term and long- term projects in transmission. Bibliography

[1] Energy Strategy 2009-2018 [2] Long-Term Electricity Balance 2013-2022_KOSTT [3] Transmission Development Plan (2014-2023)_KOSTT [4] “Studies to support the development of new generation capacities and related transmission- Kosova”, EAR [5] Annual Electricity Balance 2014_KOSTT [6] UCTE (ENTSO/E) OPERATIONAL HANDBOOK www.entsoe.eu [7] ENTSO/E SYSTEM ADEQUACY FORECAST 2010 – 2025 www.entsoe.eu [8] ENTSO/E TEN- YEAR NETWORK DEVELOPMENT PLAN www.entsoe.eu [9] List of transmission capacities and interconnection lines 2011-2020_KOSTT [10] Generation Adequacy Plan 2013-2022_KOSTT

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ANNEX A Technical data of South-East Europe’s interconnection lines Tab. A-1 List of current interconnection lines 2013 Voltage Conductors Sn Length (km) Interconnect level Interconnection line (MVA) Countries (kV) Tipi Dim. Nr/ I II Total fazave Varna -Isaccea BG -RO 750 ACSR 300 5 2390 150 85 235 Isaccea -Pivdenoukrainska RO -UA 750 ACSR 400 5 5360 5 395 400 God -Levice HU -SK 400 ACSR 500/350 2/3 1440 88 36 124 Gyor -Gabcikovo HU -SK 400 ACSR 500/450 2/3 1440 29 15 44 Zemlak -Kardia AL -GR 400 ACSR 500 2 1309 21 80 101 Mostar4 -Konjsko BA -HR 400 ACSR 490 2 1318 41 69 110 Ugljevik -Ernestinovo BA -HR 400 ACSR 490 2 1318 39 53 92 Blagoevgrad - BG -GR 400 ACSR 500 2 1309 72 102 174 Dobrudja -Isaccea BG -RO 400 ACSR 400 3 1715 81 150 231 Maritsa -Hamitabat BG -TR 400 ACSR 400 3 1715 59 90 149 Isaccea -Vulcanesti RO -MOLD 400 ACSR 400 3 1715 5 54 59 Kozloduy -Tantareni (double) BG -RO 400 ACSR 500/300 2/3 2490 14 102 116 West -Nis BG -RS 400 ACSR 500 2 1330 37 86 123 Maritsa Istok -Babaeski BG -TR 400 ACSR 500 2 1309 50 77 127 Pécs - Ernestinovo (double) HU-HR 400 ACSR 2x490 2 2x1330 86 Zerjavinec -Heviz (double) HR -HU 400 ACSR 490 2 1318 99 69 168 Chervena Mogila - Stip BG- MK 400 ACSR 490 2 1330 80 70 150 Dubrovo -Thessaloniki MK -GR 400 ACSR 490 2 1330 55 60 115 Nish – Kosova B SR- KS 400 ACSR 490 2 1317 84 40 124 Skopje 5 - Ferizaj 2 MK -KS 400 ACSR 490 2 1317 22.5 30.3 52.8 Peja 3 - Ribarevina KS-MN 400 ASCR 490 2 1317 28.7 52.1 80.84 Arachtos -Galatina HVDC GR -IT 400 HVDC 1250 / 500 / / 313 Gyor -Wien Sud (double) HU -AT 400 ACSR 500 2 2563 59 63 122 -Trebinje ME -BA 400 ACSR 490 2 1330 60 21 81 Kashar - Podgorica MN-AL 400 ACSR 2x490 2 1330 146 Arad -Sandorfalva RO -HU 400 ACSR 450/500 2 1212 5 52 57 Portile De Fier -Djerdap RS -RO 400 ACSR 967 2 1330 1 2 3 Rosiori -Mukacevo RO -UA 400 ACSR 450 2 1212 39 36 75 Ernestinovo -S. Mitrovica HR -RS 400 ACSR 490 2 1330 52 41 93 Maribor -Keinachtal (double) SI -AT 400 ACSR 490 2 1330 26 37 63 Melina -Divaca HR -SI 400 ACSR 490 2 1318 26 41 67 Tumbri -Krsko (double) HR -SI 400 ACSR 490 2 1318 32 16 48 Divaca -Redipuglia SI -IT 400 ACSR 490 2 1330 39 10 49 Mukachevo -Sajoszeged UA -HU 400 ACSR 400 2 1386 8 142 150 Bitola -Florina MK -GR 400 ACSR 490 2 1312 20 13 33 Ribarevine -Kosovo B KS -ME 400 ACSR 490 2 2000 50 73 123 Ugljevik -S. Mitrovica BA -RS 400 ACSR 490 2 1920 46 34 80 Vau Dejes -Podgorica AL -ME 220 ACSR 360 1 301 47 21 68 Fierzë -Prizren AL -KS 220 ACSR 360 1 300 26 45 71 Krusevc- Podujeva RS - KS 220 ACSR 360 1 300 70.5 14.5 85 Pljevlja -Bajina Basta ME -RS 220 ACSR 360 1 720 15 82 97 Pljevlja -Pozega ME -RS 220 ACSR 360 1 1000 14 78 92 Gradacac -Djakovo BA -HR 220 ACSR 360 1 300 19 27 46 Prijedor -Mraclin BA -HR 220 ACSR 360 1 300 66 66 Mostar4 -Zakucac BA -HR 220 ACSR 360 1 300 49 50 99 Prijedor2 -Medjuric BA -HR 220 ACSR 360 1 300 34 32 66 TE Tuzla -Djakovo BA -HR 220 ACSR 360 1 300 65 27 92 Trebinje -HE Dubrovnik (Plat) BA -HR 220 ACSR 240 2 491 7 5 12 Trebinje -HE Dubrovnik (Plat) BA -HR 220 ACSR 240 2 491 7 5 12 Trebinje -HE Perucica BA -ME 220 ACSR 360 1 301 20 42 62 Sarajevo20 -Piva BA -ME 220 ACSR 490 2/1 366 61 23 84 Visegrad -Pozega BA -RS 220 ACSR 360 1 301 18 51 69 Zerjavinec -Cirkovce HR -SI 220 ACSR 360 1 300 19 51 70 Gyor -Wien Sud HU -AT 220 ACSR 360 1 305 59 63 122 Gyor -Neusiedl HU -AT 220 ACSR 360 1 305 55 27 82 Podlog -Obersielach SI -AT 220 ACSR 490 1 366 46 20 66 Pehlin -Divaca HR -SI 220 ACSR 490 1 350 6 47 53 Divaca -Padricano SI -IT 220 ACSR 490 1 366 10 2 12 Mukachevo -Kisvarda UA -HU 220 ACSR 400 1 308 54 10 64 Mukachevo -Tiszalok UA -HU 220 ACSR 400 1 308 97 35 132

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Tab. A-2 List of interconnection lines considered to be in operation by 2030 Type In Interconnect Interconnection line kV operation Countries

Leskovac Stip RS - MK 400 Single 2014 Villanova Lastva IT - ME 500 HVDC 2015 Cirkovce Pince SI-HU 400 Double 2016 Resita Pancevo RO - RS 400 Double 2016 Tirana Kosova B AL - KS 400 Single 2016 Elbasan Ohrid AL - MK 400 Single 2018 Maritsa Iztok Nea Santa BG - GR 400 Single 2020 Bajina Basta Visegrad RS - BA 400 Single 2020 Bajina Basta Pljevlja RS - ME 400 Single 2020 Suceava Balti RO-MD 400 Single 2022 Okroglo Udine SI-IT 400 Double 2022 Bistrica Visegrad RS - BA 400 Single 2024 Bistrica Pljevlja RS - ME 400 Single 2024 Kosovo B Skopje 5 MK-KS 400 Single 2026 Skavica Prizren AL - KS 400 Single 2028 Serbia Hungary RS - HU 400 Single 2028 Serbia Bulgaria RS - BG 400 Single 2028

Tab. A-3 Internal lines planned by 2030 in the transmission network of South-eastern Europe (source SECI) Type In Internal Lines Country kV Operation

Beričevo Krško SI 400 Double 2014 Varna Dobrudja BG 400 Single 2014 Tirana2 Rrashbull AL 220 Double 2015 Babice Kalivac AL 400 Single 2015 Plovdiv Maritsa Iztok BG 400 Single 2015 Maritsa Iztok 3 Maritsa Iztok BG 400 Single 2015 Burgas Maritsa Iztok BG 400 Single 2015 Elbasan3 Kucova AL 220 Single 2015 Kucova Fieri AL 400 Single 2016 RS 400 Single 2016 Elbasan2 Kukel AL 220 Single 2017 Kukel Moglice AL 220 Single 2017 Portile de Fier Resita RO 400 Single 2017 Ostrovu Mare RO 220 Single 2017

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Burgas Dobrudja BG 400 Single 2018 Pljevlja Lastva ME 400 Single 2018 Bitola Ohrid MK 400 Single 2018 Bucuresti Sud Fundeni RO 220 Double 2018 Bajina Basta RS 400 Double 2018 Vidno Ustrem BG 400 Double 2019 Isalnita Craiova RO 220 Double 2019 Gura Ialomitei Stalpu RO 400 Single 2019 Cernavoda Gura Ialomitei RO 400 Single 2019 Cernavoda Stalpu RO 400 Single 2019 Brazi Vest Teleajen RO 400 Single 2019 Fieri Vlora AL 220 Single 2020 Fieri Vlora AL 400 Single 2020 Smardan Gutinas RO 400 Double 2020 Stejaru Gheorghieni RO 220 Single 2021 Gheorghieni Fantanele RO 220 Single 2021 Bucuresti Sud Pelicanu RO 400 Single 2021 Cernavoda Pelicanu RO 400 Single 2021 Divača Klece SI 400 Double 2022 Klece Podlog SI 400 Double 2022 Podlog Cirkovce SI 400 Double 2022 Resita Timisoara RO 400 Single 2023 Timisoara Arad RO 400 Single 2023 Resita Sacalaz RO 400 Single 2023 Sacalaz Calea Aradului RO 400 Single 2023 Calea Aradului Arad RO 400 Single 2023 Suceava Gadalin RO 400 Single 2023 Constanta Nord Medgidia Sud RO 400 Double 2023 Stalpu Brasov RO 400 Double 2024 Pozarevac RS 400 Single 2025 Prizreni 4 Ferizaj 2 KS 400 Single 2025 SG Gjakova Prizreni 4 KS 400 Single 2025 Skavica Tirana 3 AL 400 Single 2028 Bajina Basta Kraljevo RS 400 Single 2030 Kraljevo Nis RS 400 Single 2030 Klina Peja 3 KS 400 Single 2030 Klina SG Gjakova KS 400 Single 2030

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Tab. A-4 Planned substations 2014-2030 Voltage level Substation Contry Activity In operation 400/110 Zemblak AL Extension 2014 400/110 Beograd 20 RS new 2014 400/110 Vranje RS new 2014 220/110 Rrogozhina AL new 2015 220/110 Rrashbull AL upgrade 2015 220/LV Kalivac AL new 2015 400/110 Lastva ME new 2015 400/110 RS extension 2015 400/110 Smederevo RS extension 2015 220/110 Bistrica RS new 2015 400/110 Tirana3 AL new 2016 400/110 Medgidia Sud RO extension 2016 400/220/110 Cirkovce SI upgrade 2016 400/110 Kucova AL new 2016 400/220 Fieri AL new 2016 400/110 Kraljevo RS extension 2016 220/110 Komani AL new 2017 220/LV Kukel AL new 2017 220/LV Moglice AL new 2017 110/LV Banje AL new 2017 400/220/110 Resita RO new 2017 400/220 Brazi Vest RO extension 2017 400/110 Ohrid MK new 2018 400/220 Iernut RO extension 2018 400/110 Sibiu Sud RO extension 2018 400/220 Bajina Basta RS extension 2018 400/110 Ustrem BG new 2019 400/110 Vidno BG new 2019 400/110 Gura Ialomitei RO extension 2019 400/110 Cernavoda RO extension 2019 400/110 Stalpu RO upgrade 2019 400/110 Kolubara RS new 2020 400/110 Klece SI upgrade 2022 400 Bistrica RS new 2024 400/110 Vrsac RS new 2025 400 Pozarevac RS new 2025 400/110 Prizreni KS new 2025 400 Gjakovo Sgear KS new 2025 400/220 Komani AL new 2027 400/LV Skavica AL new 2028 400/220 Maritsa Iztok BG upgrade 2030 400 TS Klina KS new 2030 400 TPP Stanari BA new 2030

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