永磁同步风力发电系统控制策略的仿真分析

Simulation of Control Strategy of Permanent Magnet Synchronous Wind Power System

通过Matlab/Simulink建立了风力发电系统(又称风电系统)仿真模型。在永磁同步风力发电系统的控制中,机侧变流器采用转速外环、电流内环的双闭环控制方式;网侧变流器采用电压外环、电流内环的双闭环控制方式;机侧和网侧的控制波形均采用空间矢量脉宽调制(SVPWM)算法调制而成。仿真结果表明:母线电压、转子转速、网侧三相交流电压均可保持稳定的状态;所采用的控制策略能使风电系统稳定运行。

Permanent magnet synchronous wind power system is a complex energy conversion system,in which the converter plays a vital role,and the effective control of the converter is the key to the stably operate of wind power system.In this paper,Matlab/Simulink is used to establish the wind power system simulation model.The side converter uses the zero-D-axis strategy to control the permanent magnet synchronous generator.The specific method is the double closed-loop control mode of the outer loop of speed and the inner loop of current.The grid-side converter adopts the double-closed-loop control mode of voltage outer loop and current inner loop,and the control waveform of machine side and grid-side is modulated by SVPWM algorithm.The simulation results show that the bus voltage,rotor speed and three-phase AC voltage on the grid side can be kept in a stable state.It is verified that the control strategy of machine side and network side adopted in this paper can make the wind power system run stably.