摘要
光伏并网发电中的LCL滤波器存在谐振问题,影响系统的稳定性。对LCL滤波器的谐振问题,提出了基于电容电流反馈的有源阻尼控制,电容电流反馈控制可以看作电流内环,用于抑制LCL谐振问题,保证系统稳定;重复控制可以看作电流外环,主要是实现对并网电流的高性能跟踪控制,实现对逆变器输出电流跟踪指令电流。最后通过仿真,结果验证了控制策略的准确性和有效性。
The LCL filter exist resonance problems in photovohaic power generation, it would influence the stability of the system. For LCL filter resonance problem, this paper proposed the active damping control based on capacitor current feedback control, the capacitor current feedback control can be seen as inner current loop to suppress LCL resonance problems and ensure the system is stable ;the repeat control can be seen as the current outer ring,the key is to achieve high-performance tracking control of grid current, and achieve the inverter output current track command current. Finally,the simulation results verify the accuracy and effectiveness of the control strategy.
出处
《电气开关》
2015年第6期19-22,26,共5页
Electric Switchgear
