摘要
并网逆变器输出常采用LCL滤波器,但其为三阶系统,存在谐振隐患。在分析分裂电容反馈控制的基础上,提出了一种改进控制策略,能有效抑制并网电流中存在的谐振尖峰。同时提出了一种适用于分裂电容反馈的改进电网电压前馈控制策略,完全抵消电网对并网电流的影响。样机实验验证了该方案的有效性。
LCL filter is usually used in grid-connected inverters, but it is a third-order system with resonance peak. Based on the analysis of splitting capacitor feedback control, an improved control strategy is proposed to inhibit the resonance peak in the grid current effectively.And an improved grid voltage feed-forward strategy which adapt to splitting capacitor feedback is proposed to eliminate the impaction effect of the grid.The experimental results verify the validity of the proposed control strategy.
出处
《电力电子技术》
CSCD
北大核心
2015年第9期55-57,共3页
Power Electronics
关键词
逆变器
滤波器
分裂电容反馈
inverter
filter
splitting capacitor feedback
