【摘要】 多相永磁同步电机飞轮储能系统的并网需实现直流母线电压的稳定控制、网侧瞬时有功功率的快速响应，针对传统的并网功率/直流母线电压控制方式并网功率响应速度慢、偏差大等问题，本文开展了六相电机驱动的高速飞轮储能系统并网控制策略研究，对飞轮并网的三个阶段，提出了相适应的多相电机高速飞轮储能系统并网控制方法。在飞轮升速阶段，母线电压、飞轮转速分别由网侧变流器、机侧变流器控制；并网准备/运行阶段，母线电压采用机侧变流器控制，网侧变流器控制飞轮并网功率。基于六相永磁同步电机数学模型开展仿真验证，结果表明，所提控制策略可实现六相电机飞轮储能系统并网运行时直流母线电压的稳定控制；与传统控制策略相比，在100 kW、200 kW、300 kW、400 kW、500 kW阶跃式并网功率指令下，响应时间分别提前3 ms、9 ms、14 ms、27 ms、53 ms。更多还原

【Abstract】 In the grid-connected control of multiphase permanent magnet synchronous motor(PMSM) flywheel energy storage systems, maintaining stable DC bus voltage and ensuring fast response of grid-side instantaneous active power are critical requirements. However, conventional control strategies often suffer from slow dynamic response and large steady-state deviations. To address these issues, this paper proposes a grid-connected control strategy for a high-speed flywheel energy storage system driven by a six-phase PMSM. Corresponding control methods are designed for the three sequential stages of the grid-connection process: flywheel acceleration, grid-connection preparation, and grid-connected operation.During the acceleration stage, the DC bus voltage is controlled by the grid-side converter, while the flywheel speed is regulated by the motor-side converter. In the preparation and operation stages, the motor-side converter maintains the DC bus voltage, and the grid-side converter controls the power delivered to the grid. Simulation results based on a six-phase PMSM mathematical model verify the effectiveness of the proposed strategy. The system achieves stable DC bus voltage during grid-connected operation and demonstrates faster power response compared to conventional methods. Under step changes in power commands of 100 kW, 200 kW, 300 kW, 400 kW, and 500 kW, the response time is reduced by 3 ms, 9 ms, 14 ms, 27 ms, and 53 ms.更多还原