Abstract: Against the backdrop of high penetration of renewable energy in power systems, thermal power units struggle to independently meet the rapid response and precision requirements of grid secondary frequency regulation due to their limited regulation speed. Flywheel energy storage, with its high power density and rapid response characteristics, has become a key means of enhancing the frequency regulation performance of thermal power units. This paper divides the flywheel energy storage array at a Shanxi power plant into two groups and proposes a coordinated control strategy based on SOC partitioning and dual-group power allocation. By segmenting the flywheel power through SOC interval division, this strategy effectively coordinates the operation of both flywheel groups through priority determination and residual power allocation mechanisms. Finally, simulation based on MATLAB/Simulink validated the reliability and operational adaptability of the proposed strategy.