Recently, Guangdong Taishan Power Plant’s project Research and Operation of 60MW/60MWh Electrochemical Energy Storage for Auxiliary Frequency Regulation in Large Coal-Fired Units was awarded the 5-Star (First-Class) Achievement in the 2025 New Energy Storage Technology Innovation and Application Demonstration Cases by the All-China Environmental Federation and the Energy Equipment Technology Professional Committee of China Electricity Technology Market Association.
The electrochemical energy storage station supporting the plant’s units covers an area of 6,000 square meters. It adopts large-capacity lithium iron phosphate electrochemical energy storage systems with capacity of 25MW/25MWh and 35MW/35MWh respectively, as well as high-voltage cascaded auxiliary frequency regulation systems, with 12 sets of 5MW energy storage units installed, totaling 36 energy storage cabins. Put into operation in April 2023, the project has generated cumulative revenues exceeding RMB 200 million.
This system realizes the function allocation and coordinated control between the lithium iron phosphate electrochemical energy storage system and the unit’s frequency regulation. It enables primary frequency regulation through the EMS system, promoting energy conservation and emission reduction. Meanwhile, it achieves fully automated control with a three-layer architecture of “Main Control-EMS-PCS” and a control cycle of only 100 milliseconds, reaching the domestic leading level. This energy storage auxiliary frequency regulation system significantly improves the AGC frequency regulation level of coal-fired units, reduces the probability of low-power oscillation in unit frequency regulation response, further enhancing the reliability and safety of power grid operation. Practice has proved that the comprehensive frequency regulation K value of the unit has increased from about 0.6 to more than 1.5, enabling millisecond-level response to frequency regulation commands. It provides a benchmark for other domestic coal-fired power plants and is of great significance for promoting technological progress and green development in the power industry.
