岳惠,杨洪耕.计及并网电流控制影响的弱电网下LCL滤波器参数优化设计[J].电测与仪表,2019,56(23):132-138，145. Yue Hui,Yang Honggeng.Optimization design of LCL-filter considering the influence of grid-connected current control impacts under weak grid[J].Electrical Measurement & Instrumentation,2019,56(23):132-138，145.
计及并网电流控制影响的弱电网下LCL滤波器参数优化设计
Optimization design of LCL-filter considering the influence of grid-connected current control impacts under weak grid
The existing LCL-filter design method fails to effectively balance the limitations of the inverter current control on the filter design and the grid impedance to the grid stability. In this paper, the control performance and grid-connected stability constraints on parameter design are obtained by establishing a LCL-filtered grid-connected inverter model with weak grid as well as digital control delay. Then set up the multi-objective optimization model with the minimum loss, the lowest cost ,the best impedance adaptability to the grid and the best current tracking performance . The objective function sort deviation is used to determine the weight coefficient and the adaptive weight PSO algorithm is used to solve the optimization problem, This scheme enhances the stability margin of the LCL-filtered grid-connected inverter under weak grid while ensuring the filtering performance and manufacturing cost. Finally, the rationality and feasibility of the design scheme are verified by simulation analysis.
