KEPCO established a plan to build 500 MW of energy storage systems (ESS) for frequency regulation in stages over four years (2014-2017).
In 2014, for the first stage, KEPCO successfully installed 52 MW of ESS for frequency regulation across two sites, 28 MW at West-Ansung Substation and 24 MW at Shin-Yongin Substation.
KEPCO installed 24 MW (12 MWh) of Li-ion battery based energy storage system for frequency regulation.

Lithium-ion Battery