Chom Bung Substation is a 500kV substation located in Chom Bung, Ratchaburi, Thailand.

The Chom Bung Substation project’s construction has begun in 2018. The works are expected to be commissioned in 2021.


Chom Bung Substation project, which is an upgrade substation, will be operated by Electricity Generating Authority of Thailand.

The designed voltage level of the substation is 500kV and the operating voltage level is 500kV.

The step-in voltage of the project is 500kV.

Chom Bung Substation project development status

The development of the Chom Bung Substation project was approved by Energy Regulatory Commission in 2018. The project is expected to be commissioned in 2021. Approximately $18.54m was financed by the authorities to undertake the construction works of the project.

About Electricity Generating Authority of Thailand

Electricity Generating Authority of Thailand (EGAT) is a state-owned power utility. It generates, procures, transmits, and distributes electricity. The authority produces energy using hydro, coal, natural gas, wind, solar, geothermal, diesel, fuel oil and palm oil, among others. EGAT procures electricity from neighbouring countries and domestic IPPs and SPPs on wholesale basis. It supplies energy to the Metropolitan Electricity Authority, Provincial Electricity Authority, legal power users, and neighbouring utilities.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.