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August 31, 2021

West-Ansung (Seo-Anseong) Substation ESS Pilot Project-BESS, South Korea

By Carmen

The West-Ansung (Seo-Anseong) Substation ESS Pilot Project-BESS is a 28,000kW energy storage project located in Anseong-si, Gyeonggi, South Korea.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was commissioned in 2015.


The West-Ansung (Seo-Anseong) Substation ESS Pilot Project-BESS was developed by Korea Electric Power. The project is owned by Korea Electric Power (100%).

The key applications of the project are frequency regulation, transmission congestion relief and voltage support.

Contractors involved

Kokam America, Korea Electric Power and LG Chem Power have delivered the battery energy storage project.

Additional information

KEPCO installed 28 MW (7 MWh) of Li-ion battery based energy storage for frequency regulation. Kokam provided Lithium-titanate (LTO) based Lithium Polymer battery energy storage for 16 MW / 5.4 MWh and LG Chem provided 12 MW.

About Korea Electric Power

Korea Electric Power Corp (KEPCO) is an integrated electric utility. It generates, transmits, and distributes electricity. The company produces electricity using nuclear, thermal, renewable and other sources. Through power purchase agreements with independent power producers, KEPCO procures electricity. It also provides plant maintenance and engineering services for thermal and nuclear power plants; information services and communication line leasing; and sells nuclear fuel. KEPCO serves residential, commercial, educational, industrial, agricultural, street lighting, and overnight power customers in the country. The company is owned by Korea Development Bank, foreign investors, Government of the Republic of Korea, and others. KEPCO is headquartered in Naju-si, Jeollanam-do, South Korea.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power 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.

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