并网逆变器LCL滤波器参数优化设计

Optimal Design of LCL Filter Parameters for Grid-connected Inverter

针对传统试凑法并网LCL滤波器参数设计存在的步骤复杂、工程计算困难且参数性能优化较差等问题,在分析其数学模型的基础上,根据逆变器并网要求列出滤波器各参数的约束条件,提出了一种改进人工蜂群算法,通过引入罚函数进行约束并加入单纯形法改进蜂群算法的局部寻优能力,用来优化设计LCL滤波器参数。通过对MATLAB/Simulink设计实例的仿真,验证了该设计方法的有效性,为工程计算提供合理的设计依据。

In view of the complicated steps in the parameter design of grid-connected LCL filters with traditional trial and error method,difficult engineering calculations,and poor parameter performance optimization,based on the analysis of the mathematical model,after listing the constraints of filter parameters according to the requirements of invertergrid connection,an improved artificial bee colony algorithm was proposed.By introducing penalty function and adding simplex method to constrain and improve the local optimization ability of the bee colony algorithm,the design of LCL filter parameters was thus optimized.The simulation of the design example in MATLAB/Simulink verifies the effectiveness of the design method and provides a reasonable design basis for engineering calculations.