关键词: 飞轮储能, 永磁同步电机, 储能变流器, 磁场定向控制, 功率控制

Abstract: Based on the demand of power plant frequency regulation, the mathematical model of the energy storage flywheel permanent magnet synchronous motor was established, the stable DC bus voltage was provided by the grid-side power conversion system, the control of motor-side converter was based on the outer power/speed loop cascaded with the internal current loop, so the flywheel could charge and discharge on the command power.Aiming at the problems of output frequency fluctuation and insufficient stability, the current feedforward control was added to the power loop, and the speed loop was improved. It was verified by experiments that the flywheel system could track the charging and discharging power command in time, and the power output in steady state was stable, thus the method is feasible.

Key words: flywheel energy storage system, permanent magnet synchronous motor, power conversion system(PCS), field oriented control, power control