中文摘要：

为了抑制光伏并网系统中的谐波谐振,本文提出了一种逆变器低通滤波控制策略. 首先分析了LCL型光伏并网逆变器的频域特性,其次建立了单个光伏和多个光伏并网的诺顿等效模型,最后研究了不同并联台数情况下逆变器谐波谐振特性和多并网逆变器相互间的耦合关系. 通过SIMULINK仿真验证,证明了该方法对谐波谐振具有良好的抑制效果.

英文摘要：

In order to suppress the harmonic resonance caused by grid-connected PV system, a method of low-pass filter control is proposed in this paper.Firstly, the frequency characteristics of the grid-connected PV inverter with LCL filter is analyzed.Secondly, Norton′s equivalent model of single as well as multiple PV units are established.Finally, the harmonic resonance characteristics and the coupling relationship among inverters with different parallel numbers are studied.The SIMULINK simulation results show that the proposed method can effectively suppress the harmonic resonance of grid-connected PVs with LCL filter.