Korea Electric Power Corporation (KEPCO), led by President& CEO Kim Dong-cheol, announced that it held a completion ceremony forAsia’s largest grid-stabilising energy storage system (ESS) constructionproject on 26 March at the 154kV Bubuk Substation in Miryang City.

This project involved an investment of approximately KRW 830billion to establish 978MW of power conversion systems (PCS) and 889MWh ofbattery storage. A total of 14 companies, including Hyosung Heavy Industries,LS Electric, HD Hyundai Electric, Samsung SDI, and LG Energy Solution,participated in the project.

The ceremony was attended by more than 150 representativesfrom government, local authorities, and private companies.

The grid-stabilising ESS is designed to mitigate generationconstraints caused by power grid construction delays, allowing up to 1GW of additionalpower capacity. Once the new power grid infrastructure is completed, the ESS will be repurposed for frequency regulation to further enhance grid stability.

This ESS project was successfully completed with strongcooperation from local governments, including South Gyeongsang Province andMiryang City, and through public hearings and site briefings that incorporatedcommunity feedback.

Cheol-su Seo, KEPCO’s Executive Vice President of Power GridOperations, stated:

"KEPCO is committed to ensuring a more stable andsustainable electricity supply that enhances the national economy and thequality of life for citizens. We will continue striving towards the energytransition by leveraging the technology and expertise gained from this ESSproject."

Ho-hyun Lee, Director-General for Energy Policy at the Ministry of Trade, Industry and Energy, also remarked:

"I congratulate KEPCO on the timely completion of thisessential grid-stabilising ESS, which is crucial for strengthening SouthKorea’s competitiveness in industries such as semiconductors, AI, and datacentres. We look forward to continued stable power supply management."

Furthermore, KEPCO optimised project costs and minimisedpublic opposition by utilising available land at existing substations. Thisapproach significantly shortened the overall construction timeline whileensuring efficient expansion of power infrastructure.