Grid Integration of Wind Power in Vietnam on the Example of Binh Thuan Province
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Ministry of Industry and Trade German Development Cooperation General Directorate of Energy GRID INTEGRATION OF WIND POWER IN VIETNAM ON THE EXAMPLE OF BINH THUAN PROVINCE 10/2012 GIZ/MoIT Wind Energy Project Grid Integration of Wind Power in Vietnam on the example of Binh Thuan Province – GIZ/MoIT Wind Energy Project Contents CHAPTER 1. INTRODUCTION.....................................................................................................................3 1.1. LEGAL FRAMEWORK FOR THE STUDY .........................................................................................3 1.2. CURRENT STATUS AND PLANNED REGIONAL WIND POWER DEVELOPMENT .......................3 1.2.1 Programme of wind power development in Vietnam ..................................................................3 1.2.2 Current status and planned wind power development of Binh Thuan province .........................4 1.3. CURRENT STATUS AND PLANNED REGIONAL ELECTRICAL NETWORK DEVELOPMENT ......6 1.3.1 Power source ..............................................................................................................................6 1.3.2 220kV network ............................................................................................................................7 1.3.3 110kV network ............................................................................................................................7 1.4. POWER DEVELOPMENT PROGRAMME OF BINH THUAN PROVINCE ..................................... 12 1.4.1 Load forecast ........................................................................................................................... 12 1.4.2 Power source development programme .................................................................................. 12 1.4.3 Electrical network development programme ............................................................................ 13 1.5. STUDY OBJECTIVES ..................................................................................................................... 17 2.1. DIAGRAM OF CURRENT CONNECTION ...................................................................................... 18 2.2. MODEL FOR WIND POWER PLANT.............................................................................................. 18 2.3. MODEL ASSUMPTIONS ................................................................................................................ 21 2.3.1 Electric load .............................................................................................................................. 21 2.3.2 Power source ........................................................................................................................... 21 2.3.3 Electrical network ..................................................................................................................... 21 2.3.4 Some of applicable standards on transmission and distribution network in Vietnam .............. 21 2.4. IMPACTS ON LOADING CAPACITY OF REGIONAL ELECTRICAL NETWORK .......................... 24 2.4.1 Normal operating mode, without Tuy Phong wind power plant ............................................... 24 2.4.2 Normal operating mode, with Tuy Phong wind power plant (30MW) ...................................... 26 2.5. IMPACTS ON VOLTAGE VARIATION AT CONNECTION POINTS AND ADJASCENT NODES .. 29 2.6. IMPACTS ON SHORT-CIRCUIT CURRENT .................................................................................. 29 2.7. IMPACTS ON HARMONIC ............................................................................................................. 30 2.7.1 Harmonic wave overlapping ..................................................................................................... 30 2.7.2 Impacts of harmonic on electrical system ................................................................................ 31 2.7.3 Special simulations .................................................................................................................. 31 2.7.4 Study results of 300MW wind power plant in Binh Thuan province ......................................... 32 2.8. IMPACTS ON FLICKER .................................................................................................................. 32 2.8.1 Flicker ....................................................................................................................................... 32 2.8.2 Study results at 30MW wind power plant in Ninh Thuan province .......................................... 33 3.1. EXPECTED CONNECTION DIAGRAM .......................................................................................... 34 3.1.1 Alternative 1 ............................................................................................................................. 35 3.1.2 Alternative 2 ............................................................................... Error! Bookmark not defined. 3.1.3 Alternative 3 ............................................................................... Error! Bookmark not defined. 3.2. MODEL FOR WIND POWER PLANT.............................................................................................. 39 3.3. MODEL ASSUMPTIONS ................................................................................................................ 40 3.3.1 Power load ............................................................................................................................... 40 3.3.2 Power source ........................................................................................................................... 40 3.3.3 Electrical network ..................................................................................................................... 40 3.3.4 Some applicable standards on transmission and distribution network in Vietnam .................. 41 3.4. IMPACTS OF WPP ON LOADING CAPACITY OF LOCAL ELECTRICAL NETWORK .................. 41 3.4.1 Normal operating mode, with Tuy Phong 30 MW WPP ........................................................... 41 3.4.2 Normal operating mode, with 340MW of wind power .............................................................. 46 3.4.3 Failure mode ............................................................................................................................ 75 3.5. IMPACTS ON SHORT-CIRCUIT CURRENT .................................................................................. 79 3.6. IMPACTS OF HARMONIC ON ELECTRICAL SYSTEM ................................................................. 82 3.6.1 Input assumptions .................................................................................................................... 82 3.6.2 Results of harmonic calculation ............................................................................................... 82 3.7. IMPACTS ON FLICKER .................................................................................................................. 82 4.1. CONCLUSIONS .............................................................................................................................. 84 4.2. RECOMMENDATIONS ................................................................................................................... 85 2 Prepared by Vietnam Institute of Energy – 6/ 2012 Grid Integration of Wind Power in Vietnam on the example of Binh Thuan Province – GIZ/MoIT Wind Energy Project CHAPTER 1. INTRODUCTION 1.1. LEGAL FRAMEWORK FOR THE STUDY Economic Contract No. 83110458 between German Development Cooperation (GIZ) and Vietnam Institute of Energy (IE). Power development master plan of Binh Thuan province in the period 2011-2015, with the vision to 2020, developed in November 2011. National power development master plan in the period 2011-2020, with the vision to 2030, approved by the Prime Minister under Decision No. 1208/QD-TTg dated July 21 st , 2011. Electricity law, taking effect on July 1 st , 2005. Circular No. 12/2010/TT-BCT dated April 15 th , 2010 approved by Ministry of Industry and Trade “Stipulating transmission power system”. Circular No. 32/2010/TT-BCT dated July 30 th , 2010 approved by Ministry of Industry and Trade “Stipulating distribution power system”. 1.2. CURRENT STATUS AND PLANNED REGIONAL WIND POWER DEVELOPMENT 1.2.1 Programme of wind power development in Vietnam Nowadays, with seriously environmental pollution and exhausted fossil energy sources, many countries in the world have started to study various forms of renewable energy to replace traditional forms of energy. Renewable energy is very diverse, for example wind energy, solar energy, tidal energy, geothermal energy and biomass energy. According to [1], the Vietnamese Government has prioritized policy to developing power generated from renewable energy resource, gradually increase the density of this energy resource. It is expected that total capacity of wind power source will increase from the insignificant level (about 31 MW) at present to nearly 1,000 MW by 2020 and nearly 6,200 MW by 2030. Vietnam is located in the range of 8 0 ÷ 23 0 Northern latitude in the area of monsoon tropical climate, with two main seasons a year, the regions having good wind potential only account for 2% of the territorial area, mostly coastal regions and highlands, most of the other regions have wind regime of 2 – 4 m/s. Wind potential in some coastal regions and islands which have wind speed of over 4 m/s (at the altitude of 12m above the