摘要
双环控制策略被广泛应用于电压源逆变器的控制中,它包括UPS和有源滤波两部分。不同于以往的L和LC滤波器,基于LCL滤波器电流源工作模式的逆变器仅仅采用单电流环是无法使系统稳定的,为此需要设计出更为复杂的控制策略。分析了以电容电流和输出电流作为反馈变量的双环控制方法,以及在独立与并网工作模式下电流双环控制器的性能,最后通过实验验证了理论分析的正确性以及控制策略的可行性。
Two-loop control strategy has commonly been used in voltage-source inverter,including UPS and active rectifier. On the contrary to the L and LC filter,single current closed loop is not sufficient for the stability of the system with LCL filter.Thus improved control strategy is adopted.This paper analyzes the two-loop control strategy which uses capacitor current and output current as the feed-back control variable.The current control performance is considered respectively under independent mode and grid-connected mode.Finally the correctness of the analysis and variability of the strategy are proved by experiment.
出处
《电力电子技术》
CSCD
北大核心
2008年第9期29-31,共3页
Power Electronics
基金
台达环境与教育基金会重点资助项目(DR-EK200501)~~
