China Energy Construction and Power Engineering Group Wins Contract for First National Compressed Air Energy Storage Project

On March 11, China Energy Construction and Power Engineering Group Northeast Institute was awarded the EPC+F general contracting for the Baoqing 350 MW/1750 MWh compressed air energy storage national demonstration project. As China’s first large-scale compressed air energy storage station with a 350 MW capacity using artificial cavern storage technology, the implementation of this project marks a significant breakthrough in China’s new long-duration energy storage technologies and their large-scale application.

The project employs a hybrid energy storage system combining 350 MW of compressed air energy storage with 6 MW of flywheel energy storage, achieving a combined function of long-duration peak shaving and short-duration frequency regulation. The compressed air energy storage system is configured with a 7-hour storage duration and 5-hour power generation capacity, with energy-to-energy conversion efficiency exceeding 70%. The flywheel energy storage system has a millisecond-level response time and can provide instantaneous frequency support to the grid. Considering the long and harsh winter climate in Baoqing, Heilongjiang, the project maximizes the recovery of low-grade heat generated during the compression process for heating the plant and preheating the compressor intake during extreme cold weather, further improving the system's overall efficiency.

Once completed, the project is expected to support the grid in absorbing over 1 billion kWh of renewable energy annually. Located in the key energy base of Baoqing County, Heilongjiang, the project will reduce wind and solar curtailment by approximately 840 million kWh per year.