Korean utility KEPCO completed a 978 MW battery project that us billed as Asia''s largest battery energy storage system for grid stabilization purposes.
South Korean utility Korea Electric Power Corp. (KEPCO) has officially finished construction works on a massive battery energy storage project in the city of Miryang, in Gyeongsangnam-do Province.
Billed as Asia''s largest battery energy storage system for grid stabilization purposes, the system has a power output of 978 MW and a storage capacity of 889 MWh.
The ceremony marking the completion of construction was held on Thursday, September 27, at the 154 kV Bubuk Substation in Miryang.
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Korea Electric Power Corporation (KEPCO), the largest electric utility in South Korea, and ABB have signed a Memorandum of Understanding (MoU) to supply the country''s first high-inertia flywheel synchronous condenser to help maintain the robust operation of the power grid on Jeju Island. This project will play a vital role in maintaining the stability, reliability, and continuity of the electricity network as the island integrates increasing levels of renewable generation to meet its ambitious clean energy goals. The project is integral to the vision of Jeju''s local government to achieve net-zero emissions by 2035 through a transition to renewable energy and clean hydrogen.
Jeju Island, located 240 km south of the main Korean peninsula, is home to around 670,000 people. It is also a popular tourist destination, with over 15 million visitors each year. The island is rapidly expanding its renewable energy infrastructure, with the use of wind and solar increasing its share of the power mix.
The ABB synchronous condenser, rated at 50 megavolt-ampere reactive power (Mvar) and close to 500 MWs will be installed close to a high voltage direct current (HVDC) station in the north of Jeju where a subsea cable connects the island to the mainland power grid. Its key feature is a high-inertia configuration that couples the synchronous condenser with a large flywheel. This approach multiplies the instantaneously available inertia by several times to ensure that network frequency is held stable within the tight limits essential to maintain grid reliability, while the synchronous condenser also provides voltage stability.
Eun-Bo Sim, President of KEPCO Research Institute said, "The introduction of the ABB''s flywheel synchronous condenser system will greatly enhance the stability of the Jeju power grid. KEPCO is committed to providing sustainable energy solutions."
Kristina Carlquist, Head of Synchronous Condenser Product Line at ABB Large Motors and Generators Division, said, "With ABB''s proven technology and designs compliant with Korean standards, this flywheel synchronous condenser system will significantly improve frequency stability in the Jeju power grid. Through this project, ABB will set the standards for flywheel synchronous condenser systems in South Korea. We look forward to continuing our technological collaboration with KEPCO to further enhance the future stability of the Korean power grid as it transitions to green energy."
The Jeju Island synchronous condenser is being designed and manufactured by ABB in Sweden as part of a package that also includes engineering and commissioning. It is scheduled to be in operation by the end of 2026.
ABB is a technology leader in electrification and automation, enabling a more sustainable and resource-efficient future. The company''s solutions connect engineering know-how and software to optimize how things are manufactured, moved, powered and operated. Building on over 140 years of excellence, ABB''s ~105,000 employees are committed to driving innovations that accelerate industrial transformation.
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Korea Electric Power Corp. (KEPCO) has officially finished construction works on a massive battery energy storage project in the city of Miryang, in Gyeongsangnam-do Province.
Billed as Asia’s largest battery energy storage system for grid stabilization purposes, the system has a power output of 978 MW and a storage capacity of 889 MWh.
The project broke ground in 2022, following a two-year preliminary feasibility study. It was carried out in phases and across KEPCO''s six substations (Yeongju, Hamyang, Yesan, Yeongcheon, Shinnamwon, and Bubuk).
The final and the biggest portion of the project – the 336 MW battery energy storage system at the Bubuk substation in the Nano Industrial Complex, Miryang-si, Gyeongsangnam-do – was switched on in July.
A total of 14 companies, including Hyosung Heavy Industries, LS Electric, HD Hyundai Electric, Samsung SDI, and LG Energy Solution, participated in the project, which came with a price tag of KRW 830 billion won ($632 million).
KEPCO delivered the project in line with the 9th Basic Electricity Supply and Demand Plan, which aims for a 40% share of renewable energy in Korea’s electricity mix by 2034.
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