On July 22nd, the 600MW Subcritical Thermal Power Unit Flexibility Retrofit Project with Steam Extraction Heat Storage developed by Yantai Longyuan Power Technology Co., Ltd. (a subsidiary of CHN Energy Technology & Environment Limited) successfully passed CHN Energy's acceptance inspection. This project represents the largest operational "steam extraction heat storage" molten salt thermal energy storage facility in China.

Based at Hebei Longshan Power Plant's 600MW unit, the project utilizes molten salt energy storage technology to provide grid peak regulation and frequency modulation services. Operational data confirms the system reduces the boiler's minimum stable combustion load by an additional 100MW, enabling continuous peak shaving for over 4 hours. Under rated conditions, it boosts unit output by 30-60MW for peak support durations exceeding 6 hours, while improving Automatic Generation Control (AGC) performance by 150%.

The successful implementation of this project provides valuable practical experience and technical support for the large-scale integration of molten salt energy storage with coal-fired power units, establishing significant demonstration value for wider industry adoption.