基于超级电容的永磁直驱风电机组低电压穿越控制研究

Study on LVRT Control Strategy of Permanent Magnet Directly-driven Wind Turbine based on Super Capacitor

通过分析传统永磁直驱风电系统的低电压穿越能力的原理与存在问题,其中选用超级电容储能系统与合适的控制策略,采用综合的网侧变流器控制方法,从而建立了相应的永磁直驱风电系统的仿真模型。仿真结果表明,采用超级电容储能系统与合适的控制策略,可以改善永磁直驱风电机组的低电压穿越能力。

This paper analyzes the theory ofthe low-voltage ride throughcapability in the classical permanent magnet directly-driven wind power system and discusses the inherent problem. With super capacitor energy storage system and adaptive control strategy, acomprehensivecontrol method of line-side converter is proposed. Matlab simulation of permanent magnet directly-driven wind power systemis carried out. The results confirm thatsuper capacitor energy storage system and appropriate control strategy can improve the low-voltage ride through capability of permanent magnet directly-driven wind turbine.