On July 3, 2025, Shenfu Demonstration Zone in Liaoning Province achieved a major breakthrough in the energy sector, and the first thermal power unit coupled with supercapacitor energy storage frequency regulation project in Northeast China officially started construction. The project is invested and constructed by Liaoning Datang International Shendong Thermal Power Co., Ltd., with a total investment of 27.51 million yuan and a construction scale of 10MW × 10min supercapacitor energy storage system. This innovative project marks significant progress in the transformation of thermal power flexibility and the construction of power grid auxiliary service capabilities in the Northeast region.

The project adopts internationally leading supercapacitor technology and is equipped with two 5MW × 10min supercapacitor compartments, which are currently the world's largest single units. It is also equipped with four integrated converter and boost machines, a 6kV medium voltage distribution compartment, and an intelligent frequency control compartment to build an efficient energy conversion system. 

Compared with conventional lithium battery energy storage, this project has three major technological advantages: millisecond level response speed can completely solve the problems of reverse regulation and response delay in thermal power frequency regulation process; The ultra long cycle life brings significant economic improvements throughout the entire lifecycle; The intrinsic safety design completely avoids the risk of thermal runaway.

The relevant person in charge of Liaoning Datang International Shendong Thermal Power Co., Ltd. stated that this project is an important practice for traditional thermal power enterprises to transform into smart energy service providers. After the project is completed and put into operation, it will significantly improve the speed, accuracy, and duration of the unit's response to grid frequency regulation. As the first demonstration project of thermal storage frequency regulation in Northeast China, its successful implementation will provide replicable and promotable practical experience for the technological transformation of similar units and participation in the power auxiliary service market, which is of great significance for promoting the optimization and upgrading of the energy structure in Northeast China. (This article is from the official website www.seetao.com of Jian Dao. Reproduction without permission is prohibited, otherwise it will be prosecuted. Please indicate Jian Dao website+original link when reprinting.) Jian Dao website infrastructure engineering column editor/Yang Beihua