永磁同步并网风力发电系统双模块控制研究

针对永磁同步并网风力发电系统,研究了一种双模块控制系统。MPPT控制模块在整流器和逆变器之间设置Buck变换器,使用优化后的最优梯度-爬山法策略控制Buck变换器占空比。并网逆变控制模块采用直流母线电压瞬时值外环及并网电流瞬时值内环的双环控制策略,通过外环电压PI控制得到指令电流,进而采用PI瞬时电流控制经逆变器和LCL型滤波器得到并网输出电流。仿真实验波形表明,MPPT控制模块能够快速、稳定地跟踪最大功率。逆变器输出符合并网要求,控制效果具有较好的稳定性和动态特性。

Research of Permanent Magnet Synchronous Grid Wind Power System Double Module Control

This paper research a double module control system in permanent magnet synchronous grid wind power generation system. Buck converter the MPPT control module is set between the rectifier and inverter, duty cycle of Buck Converter was controlled by optimized the optimal gradient - climbing method strategy. Grid inverter control module used DC bus voltage instantaneous value of the outer ring and the current instantaneous value of the inner ring double-loop control strategy, it through the outer loop voltage PI control current instruction, and then net output current was obtained by using PI instantaneous current control by the inverter and LCL filter. The simulation experiments waveform show that the MPPT control module can quickly and stably track the maximum power. The output of the inverter to meet network requirements, the control effect has better stability and dynamic characteristics.