基于分数阶滑模与快速指数趋近律的永磁同步电机功率控制

Fractional order sliding mode output power control of PMSG wind turbine with fast exponential reaching law

提出了一种基于分数阶滑模与快速指数趋近律的永磁同步电机输出功率控制策略。永磁同步电机的拓扑结构由晶闸管逆变器、升压斩波电路、L型逆变器及中性点箝位逆变器组成。所提出的分数阶滑模方法在收敛速度及抑制抖振现象上显示出了优越的控制性能。同时,采用快速指数趋近律,使得系统的总谐波失真程度大大降低。通过在一个永磁同步风力电机上的仿真实验,验证了所提方法具有更好的追踪性能,并能得到平滑地公共耦合点电流,同时可以维持直流链电压的平衡与稳定。

This paper proposed a power output control of permanent magnet synchronous generator（PMSG）wind turbine with fast exponential reaching law based on fractional order sliding mode（FOSM）.The topology of wind energy conversion system based on PMSG is comprises of a diode rectifier,boost converter,L filter and a neutral point clamped inverter.The proposed FOSM approach shows remarkable performance in chattering phenomenon mitigating and convergence speed.Meanwhile,with the fast exponential reaching law,the level of total harmonic distortion is largely reduced.The performance of the proposed FOSM approach is verified by a simulation study in a PMSG wind turbine.Results indicate that the proposed method has better tracking performance,smoother point of common coupling current and stabilized DC-link voltage.