基于参数优化LCL滤波器的直驱式PMSG并网控制

摘要

The output power of the wind power generation system fluctuate,and thus leading to voltage flicker and harmonic pollution injected to power network.In this paper,filter is added to the wind turbine on the inverter-side and grid-connected control is studied.The active damping control strategy is based on structure of the rectifier-side voltage as the outer loop and the feedback of capacitor current as the inner loop.Furthermore,the constant DC voltage is adopted to adjust the inverter power and the total inductance parameters of the LCL filter are optimized.Finally,the harmonic current of the three-phase grid-connected side of the direct drive PMSG is simulated,and the correctness and effectiveness of the proposed method is verified.%风力发电系统其输出功率具有波动性、因此造成电压闪变以及对电网注入谐波污染,文章对风机逆变器侧添加滤波器进行并网控制,采用整流侧电压为外环控制结构,内环为电容电流反馈的控制策略实现系统的有源阻尼控制,且引入恒直流电压调节逆变功率同时对LCL滤波器的总电感量参数进行最小化优化.最后通过直驱式永磁同步发电机三相并网侧的谐波电流进行了算例仿真,验证了所提方案的正确性和优化的有效性.