电网技术2018，Vol.42Issue(3)：949-956,8.DOI:10.13335/j.1000-3673.pst.2017.1366
考虑弱电网下逆变器稳定性的LCL滤波器参数优化方法
Optimized LCL-Filter Design Considering Stability of Grid-Connected Inverters in Weak Grid
摘要
Abstract
As existing optimized filter design scheme gives no consideration to effects of grid impedances and current controllers, it will eventually cause instability due to large-scale integration of renewable energy. This article obtains constraints for stability of grid-connected inverters based on impedance analysis method, and a multiple-objective optimal model is established with objective functions of minimal damping power loss, minimal cost and optimum current tracking performance. PSO algorithm with compression factor is used to solve the optimization problem, and fuzzy membership function is defined to quantitatively analyze optimization level. The optimization can balance cost and filtering performance and increase stability margin, especially suitable for LCL filter parameters design in weak grid. Finally, simulation results verify effectiveness of the proposed method.关键词
LCL滤波器/弱电网/稳定裕度/参数设计/指标隶属度Key words
LCL filter/weak grid/stability margin/parameter design/membership grade of index分类
信息技术与安全科学引用本文复制引用
郭超,杨洪耕..考虑弱电网下逆变器稳定性的LCL滤波器参数优化方法[J].电网技术,2018,42(3):949-956,8.基金项目
国家自然科学基金资助项目(51477105). Project Supported by National Natural Science Foundation of China (51477105). （51477105）
