Transmission System Development and Expansion Projects

Approved projects

1. Bulk Power Supply for the Greater Bangkok Area Phase 2 Project (GBAS2)

          Being a successive project of the Bulk Power Supply for the Greater Bangkok Area Phase 1 Project (BSB1), the project costs 9,170 million Baht and comprises the construction of new transmission lines of 89.025 circuit-kilometers and a new substation, expansion of 6 substations, installation of transformers totaling 10,600 MVA and capacitor bank of 672 MVAr, and 23 other miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of the project was 88.95 percent. This project is scheduled to be completed in 2019..

2. Transmission System Development Project for Power Purchase from Nam Ngum 3 and Nam Theun 1 Hydropower Plants (NNG3-NTN1)

          The purpose of this transmission system development project is to accommodate the power purchase from Nam Ngum 3 and Nam Theun 1 Hydropower Plants and/or other potential projects in Lao PDR. The project costs 16,337.60 million Baht and consists of the construction of the transmission line of 1,004.832 circuit-kilometers and a new substation, expansion of 3 substations, installation of transformers of 4,000 MVA and capacitor bank of 770 MVAr, and 2 other miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of the project was 92.88 percent. The project is scheduled to be completed in 2018.

3. Transmission System Development Project for Power Purchase from IPPs (IPPP)

          The purpose of this transmission system development project is to accommodate the power purchase from the IPP power plants under 4 sub-projects of the installed capacity of approximately 4,400 MW. The project costs 7,958 million Baht and consists of the construction of the transmission line of 169.40 circuit-kilometers and 2 new substations, expansion of 6 substations, installation of transformers of 1,000 MVA, and 4 other miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of the project was 76.84 percent. The completion date of the project is pending, awaiting the clarification of the project for power purchase from the National Power Supply Co., Ltd.

          The construction of 3 transmission system sub-projects has been completed except for the sub-project of the transmission system to accommodate the power purchase from the thermal power plant of the National Power Supply Co., Ltd. of which the power purchase agreement has not been signed and is awaiting the cabinet resolution on dispute settlement by arbitration process and approval on the new EHIA.

4. Transmission System Expansion and Renovation Project Phase 1: Substation (RSP1) (GBAS2)

          As the electricity equipment and structure of several substations are aged, deteriorated, and liable to risk in electricity availability, EGAT executives have given the policy to prepare a plan for improvement/renovation or addition of electricity transmission equipment and buildings in the aged substations so that the transmission system is complete with availability, reliability, and security. This project costs 3,815 million Baht and consists of renovation of 15 substations. As of December 2017, the progress of the project was 79.03 percent. It is scheduled to be completed in 2019.

5. Main Transmission System Expansion Project for Power Purchase from Small Cogeneration Power Plants, Based on Request for Proposal 2010 (SPPC)

         The project for Power Purchase from Small Cogeneration Power Plants costs 10,610 million Baht and consists of the construction and expansion of relevant transmission system of 490 circuit-kilometers, a new substation, expansion of 72 substations, and installation of the transformers of 2,500 MVA. As of December 2017, the progress of the project was 85.62 percent. The project is scheduled to be completed in 2019.

6. Transmission System Expansion and Renovation Project Phase 1: Transmission Line (RLP1)

          The project involves the expansion and renovation of the transmission lines which are aged, deteriorated, and liable to risk in electricity availability. The project costs 9,850 million Baht and comprises the construction of 15 transmission lines of 331 circuit-kilometers and the expansion of 14 substations. As of December 2017, the progress of this project was 81.28 percent. It is scheduled to be completed in 2023.

7. Transmission System Development Project in the Area of Loei, Nong Bua Lam Phu, and Khon Kaen Provinces for Power Purchase from Lao PDR (LNKP)

          The purpose of this transmission system development project is to accommodate power purchase from Xayaburi Hydroelectric Plant in Lao PDR to increase the security of electricity system. The project costs 12,060 million Baht and consists of the construction of the transmission lines of 505 circuit-kilometers, 3 substations, expansion of 4 substations, and installation of transformers of 2,400 MVA. As of December 2017, the progress of this project was 73.87 percent. It is scheduled to be completed in 2021.

8. Transmission System Expansion and Renovation Project Phase 2 (RTS2)

          The project is a successive scheme of the Transmission System Renovation and Expansion Project Phase 1. This project costs 21,900 million Baht and consists of the renovation and expansion of 11 transmission lines of 1,267 circuit-kilometers and 19 substations. As of December 2017, the progress of this project was 18.65 percent. It is scheduled to be completed in 2023.

9. Transmission System Development in the Area of Ubon Ratchathani, Yasothon, and Amnat Charoen Provinces for Power Purchase from Lao PDR Project (UYAP)

          This project is intended to accommodate the power purchase from Xe-Pian Xe-Namnoy Hydropower Plant Project to increase the security of the power system. The project costs 7,300 million Baht and consists of the construction of transmission lines of 440 circuit-kilometers, construction of a new substation, expansion of 6 substations, and installation of transformers of 400 MVA. As of December 2017, the progress of this project was 47.05 percent. It is scheduled to be completed in 2018.

10. Transmission System Improvement Project in Eastern Region for System Security Enhancement (TIPE)

          The purpose of this transmission system improvement project is to enhance the security of the power system in the Eastern part of Thailand to continuously and sufficiently cope with the rising demand for electricity, to receive electric power from new power plants, and to promote the expansion of industry and tourism in the Eastern part of Thailand. The project costs 12,000 million Baht and consists of the construction of transmission lines of 469.664 circuit-kilometers and 3 new substations, expansion of a substation, installation of transformers of 3,000 MVA, and 8 miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of this project was 19.20 percent. It is scheduled to be completed in 2022.

11. Bulk Power Supply for the Greater Bangkok Area Phase 3 (GBA3)

         The project is a successive project of the Bulk Power Supply for the Greater Bangkok Area Phase 2 (GBA2) Project. The objective of this project is to respond to the increasing demand for electricity in the area of Greater Bangkok which is the most important economic center of the country and to enhance the security of the electricity system of Thailand. The project costs 12,100 million Baht and comprises the construction and improvement of the transmission lines of 176.030 circuit-kilometers and 2 new substations, expansion of a substation, installation of transformers of 10,200 MVA and capacitor bank of 96 MVAr, and 10 miscellaneous works relating to the expansion of the transmission system. As of December 2017, the progress of this project was 45.01 percent. It is scheduled to be completed in 2021.

12. Transmission System Expansion Project Phase 12 (TS12)

          Being a successive scheme of the Transmission System Expansion Project Phase 11 (TS11) Project, the project costs 60,000 million Baht and consists of the construction of transmission lines of 3,127.927 circuit-kilometers and 7 new substations, expansion of 75 substations, installation of transformers of 25,700 MVA, capacitor bank of 1,770 MVAr, static var compensator (SVC) inductive of 50 MVAr/capacitive of 100 MVAr, and 182 miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of this project was 13.09 percent. It is scheduled to be completed in 2022.

13. Transmission System Improvement Project in Western and Southern Regions to Enhance System Security (TIWS)

          The project involves the construction of the 500 kV transmission system lines and additional improvement of the 230 kV transmission systems to cope with the increasing demand for electricity in the South of Thailand in the long run, to increase the capability of the transmission system from the West/Central of Thailand to the South, to promote the expansion of business, industry, and tourism, and to remedy the power outage problem in the South. The project costs 63,200 million Baht and consists of the construction of transmission lines of 2,192 circuit-kilometers and a new substation, expansion of 8 substations, installation of transformers of 4,000 MVA, capacitor bank of 2,120 MVAr, static var compensator (SVC) inductive of 50 MVAr/capacitive 250 of MVAr, and 10 miscellaneous works relating to the transmission system expansion. As of December 2017, the progress of this project was 4.70 percent. It is scheduled to be completed in 2023.

14. Transmission System Development for the Replacement Project of Mae Moh Power Plant Units 4-7 (MMR1)

          The transmission system development involves the construction of transmission lines to accommodate the new Mae Moh thermal power plant with the generating capacity of 600 MW to replace the former power plant which has been in operation for more than 25 years and to respond to the government’s policy in making use of the local fuel for the maximum benefits. The investment cost for the transmission system is 360 million Baht which consists of the construction of 230 kV transmission lines of 3.40 circuit-kilometers from the switchyard of the power plant to Mae Moh 3 Substation and the expansion of Mae Moh 3 Substation. As of December 2017, the progress of this project was 90.25 percent. It is scheduled to be completed in 2018.

15. Transmission System Development Project for the Northeast Region, Lower North Region, Central Region, and Bangkok Metropolitan for System Security Enhancement (TIEC)

         The project will improve the security of the power system in the Northeast Region, Lower North Region, Central Region including Bangkok Metropolitan to accommodate the renewable and alternative power projects for 25 percent within 10 years (2012-2021) under the Alternative Energy Development Plan (AEDP) of the government and support the ASEAN Power Grid (APG) system. The investment cost of the project is 94,040 million Baht comprising the construction of transmission lines of 2,622 circuit-kilometers, construction of 3 new substations, expansion of 7 substations, and installation of transformers of 12,000 MVA. As of December 2017, the progress of the project was 0.38 percent. It is scheduled to be completed in 2030.

16. Transmission System Development Project for the Upper Northern Region for System Security Enhancement (TIPN)

          The project will improve the security of electricity system of the upper Northern Region by the construction of additional transmission lines of 500 kV and 230 kV to supply more electricity to Chiang Mai and Lamphun Provinces. The project will strengthen the security of the transmission system to cope with the rising demand for electricity in the long run and support power projects of neighboring countries in the future and the ASEAN Power Grid (APG) system. The project has an investment cost of 12,240 million Baht and consists of the construction of transmission lines of 420 circuit-kilometers, construction of a new substation, expansion of 7 substations, and installation of transformers of 3,350 MVA. As of December 2017, the progress of the project was 1.16 percent. It is scheduled to be completed in 2021.

17. Transmission System Development Project for the Replacement Project of South Bangkok Power Plant Phase 1 (SBR1)

          The project will support the Replacement Project of South Bangkok Power Plant Units 1-5 of 1,330 MW which will be decommissioned in 2019. The project costs 1,090 million Baht and consists of the construction of transmission lines of 230 kV from the switchyard of the power plant to the South Bangkok substation and the expansion of South Bangkok substation. It is scheduled to be completed in 2020.

18. Transmission System Improvement Project in Lower Southern Region to Enhance System Security (TILS)

          The project involves the construction of transmission system of 500 kV from Surat Thani Province to Songkhla Province and the improvement of transmission system of 230/115 kV to increase the security of the power system of the South in a long term and support the electricity demand of the household, business, industry, and tourism from the creation of the ASEAN Economic Community (AEC).The project will also support the linking with the main power plants or renewable power plants in line with the government’s policy responding to fuel diversification scheme, cope with the power failure and the annual overhaul of natural gas pipelines, and support the ASEAN Power Grid (APG) and the power purchase from neighboring countries. The project costs 35,400 million Baht and consists of the construction of 1,409 circuit-kilometers, construction of 2 new substations, expansion of 9 substations, and installation of transformers of 4,000 MVA. It is scheduled to be completed in 2024.

19. Transmission System Development Project for the Replacement Project of Bang Pakong Power Plant Units 1-2 (BRP1)

         The project will support the Replacement Project of Bang Pakong Power Plant Units 1-2 of 1,300 MW. The transmission system project costs 784.40 million Baht and consists of the construction of transmission lines of 230 kV of 2.0 circuit-kilometers from the switchyard of the power plant to Bang Pakong substation. It is scheduled to be completed in 2020.

20. Transmission System Development Project for Pha Chuk Hydropower Plant (PCHP)

          The objective of the Pha Chuk Hydropower Plant Project is to promote the use of renewable energy and to reduce the proportion of energy import. The project costs 211.50 million Baht and consists of the construction of transmission lines of 115 kV from Pha Chuk substation to T-Tap, 115 kV from Sirikit - Uttaradit of 7 circuit-kilometers, construction of Pha Chuk substation, and expansion of 2 substations. It is scheduled to be completed in 2020.

Transmission System Projects under Approval Process

1. Transmission System Development for Thepha Coal-Fired Power Plant (TPPP)

          According to the Power Development Plan of Thailand B.E. 2558-2579 (PDP 2015), a clean coal power plant will be established to respond to the electricity demand of the country, to strengthen the security of the electricity system in the South, and to reduce the risk of dependency on any kind of fuel (Thepha Coal-Fired Power Plant Units 1-2, each of which has the generating capacity of 1,000 MW). As the South of Thailand is increasingly important in economic and tourism aspect, it is necessary to plan for a self-dependent electricity system which is sufficient for the demand and to prevent a blackout in a wide area in the future. The transmission system development project costs 7,480 million Baht comprising the construction of transmission lines of 150 circuit-kilometers, construction of a new substation, and expansion of 5 substations. The project is scheduled to be completed in 2024.

2. Transmission System Development Project for Special Economic Zone Phase 1(SEZ1)

         The objective of the project is to cope with the rising demand for electricity from the operation of the ASEAN Economic Community (AEC) and the government’s policy concerning promotion of renewable power plants in the Special Economic Zone in which there is no other power distribution system to support. The project involves the construction/improvement of additional transmission lines and substations of 230 kV and 115 kV in Tak and Mukdahan Provinces so that more electricity can be supplied to the mentioned area, and long term power security can be achieved. The project costs 2,150 million Baht and consists of the construction of transmission lines of 171 circuit-kilometers and expansion of 5 substations. The project is scheduled to be completed in 2024.

3. Transmission System Development Project for Power Purchase from Independent Power Producers (IPPs) Phase 3 (IPP3)

          The objective of the project is to relate the project for Power Purchase from Independent Power Producers (IPPs) with the EGAT power system to respond to the demand for electricity in the Eastern and Central Regions. The project adds to the dynamism in the operation concerning the control and supply of electricity in the Eastern Region including the case of decommissioning of the power plants and the power plants under maintenance. According to the Power Development Plan of Thailand B.E. 2553-2573 (PDP 2010: Revision 3), in which the government has a policy to purchase electricity from the Independent Power Producers (IPPs) of combined cycle power plants, the selected companies are Gulf SRC Company Limited with the generating capacity of 4x625 MW (to be completed in 2020) and Gulf PD Company Limited of the generating capacity of 4x625 MW (to be completed in 2022).

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