基于RT-LAB永磁同步风力发电系统的实时仿真

RT-LAB-based real time simulation of permanent magnet synchronous wind power system

为提高风力发电系统模拟的准确性和有效性,通过RT-LAB实时仿真器建立直驱式永磁同步风力发电机模型,包括风力机模块、最大风能捕获模块、功率跟踪模块、永磁同步发电机及背靠背PWM变频器主电路模块、SVPWM矢量控制模块等。采用机侧转子磁链定向控制与网侧直接功率控制,实现对发电机转子转速的跟踪和网侧并网的要求,分析风力机故障输出转矩急剧变化时对并网电流的影响。仿真实验表明:系统总超时数达到实时控制的要求,实验结果与理论分析一致,证明仿真系统的有效性。

This paper introduces an improved accuracy and effectiveness required for the simulation of wind power system.The targeted improvement is obtained by developing a direct drive permanent magnet synchronous wind system based on the RT-LAB real-time simulator,including wind turbine module,the maximal wind energy capture module,power tracking module,permanent magnet synchronous generator and the back-to-back PWM converter main circuit module,SVPWM vector control module; the tracking of the rotor speed and grid connection thanks to the use of the rotor flux oriented control on the machine side,and the direct power control on the grid side ; and analysis of the effect on the grid current by the sharp change of output torque caused by wind turbine fault.Simulation results show that：the system has a total timeout up to the requirement of real-time control,offers the experimental results consistent with the theoretical analysis and thus proves to be valid.