The coupling of thermal units with flywheel energy storage system can effectively improve the frequency regulation performance of AGC, solve the problems of long response time, slow climbing rate and low regulation accuracy of thermal units when tracking AGC commands, and obtain. The coupling of thermal units with flywheel energy storage system can effectively improve the frequency regulation performance of AGC, solve the problems of long response time, slow climbing rate and low regulation accuracy of thermal units when tracking AGC commands, and obtain. Traditional frequency regulation resources, such as thermal and hydroelectric plants, suffer from slow response times, limited adjustability, and insufficient capacity to counteract the rapid power imbalances introduced by solar and wind farms. In contrast, energy storage battery systems offer. Frequency Regulation AGC systems are critical for maintaining the grid's frequency at its nominal value (e. Voltage Control Alongside frequency, maintaining a stable voltage. However, energy reserve limitations of storage resources pose challenges to their integration in centralized automatic generation control (AGC).