永磁直驱风力发电系统控制策略仿真研究

Simulation Research on Control Strategy of Permanent Magnet Direct Drive Wind Power Generation System

风力发电系统是一个复杂的能量转换系统,有效地控制是系统安全、稳定运行的关键.针对永磁直驱风力发电系统(PMSG),机侧变流器采用功率外环、电流内环双闭环控制;网侧变流器采用电压外环、电流内环双闭环控制;最大功率点跟踪(MPPT)控制采用变步长爬山搜索法.建立了基于该控制策略的永磁直驱风力发电系统MATLAB仿真模型.仿真结果表明,采用该控制策略,系统能跟踪风能最大功率点安全、稳定运行,验证了该控制策略的有效性.

Wind power generation system is a complex energy conversion system,and effective control is the key to the safe and stable operation of the system.In this paper,for the permanent magnet direct drive wind power generation system(PMSG),the generator side converter adopts the double closed-loop control of the power outer loop and the current inner loop;the grid side converter adopts the double closed-loop control of the voltage outer loop and the current inner loop;the maximum power point tracking(MPPT)control adopts the variable step climbing search method.Then,the MATLAB simulation model of permanent magnet direct drive wind power generation system based on the control strategy is established.The simulation results show that the system can track the maximum power point of wind energy safely and stably,and the effectiveness of the control strategy is verified.