摘要
在三相光伏并网变流器滤波控制中,L滤波器在高频时滤波效果差。分别针对L,LCL滤波器进行了滤波特性及稳定性的分析,在一种新型LCL滤波电路的基础上,提出了一种含有电容电流闭环的闭环控制策略,提高了系统的稳定性。通过三相光伏并网系统仿真实验,实现了单位功率因数并网,实物试验验证了理论分析的正确性以及控制系统的可行性。
In the filter control of three-phase photovoltaic grid-connected inverter,the filtering effect of L filter is worse than the LCL filter in high frequency. In this paper,a new LCL filter circuit is come out,which is suitable for photovoltaic grid-connected inverter system after the filter and stability characteristics of L and LCL filter are analyzed. With a capacitive current closed-loop control strategy is proposed on the basis of the original system,which with a high stability. We also achieve to give in power grid with unity power factor verify three-phase photovoltaic grid-connected inverter simulation system and physical system,the theoretical analysis and control strategy is feasible.
出处
《电气传动》
北大核心
2013年第S1期44-47,共4页
Electric Drive
关键词
光伏变流器
电容电流闭环
LCL
单位功率因数
photovoltaic inverter
capacitive current closed loop
the LCL
unity power factor
