On April 9, 2025, Huaneng Group announced that the first supercapacitor frequency regulation project in Central China has officially begun operations, providing new technological support for the safe and stable operation of the local power grid.
Located at the Huaneng Yangluo Power Plant in Wuhan, this project features a series of “white boxes” that represent the region’s first supercapacitor frequency regulation system. It comprises a 14-megawatt lithium iron phosphate battery combined with a 6-megawatt supercapacitor energy storage system. This setup can be likened to a “super power bank” within a thermal power plant. It operates in conjunction with two 640,000-kilowatt high-efficiency supercritical coal-fired generating units via a smart management system, utilizing a “unit + energy storage” collaborative regulation mode to participate in power grid frequency regulation.
By integrating supercapacitor energy storage into traditional lithium battery systems, this technology combines the longevity of lithium battery storage with the rapid response benefits of supercapacitors, enabling quick, safe, and large-capacity energy storage and release.
According to Qiu Fengtao, deputy director of Huaneng Yangluo Power Plant, the implementation of the supercapacitor frequency regulation project enhances the frequency response speed and timing of the Yangluo Power Plant’s units by over ten times, while also increasing regulation accuracy by more than four times. This advancement is expected to significantly promote energy conservation and carbon reduction in thermal power units, ensuring the safe and stable operation of the power grid.
