闭环反馈控制功率电子变换系统不稳定性抑制技术

Instability Suppressing Technique for Power Electronic Converters with Close Loop Feedback Control

闭环反馈控制功率电子变换系统容易发生不稳定现象。本文在分析研究了补偿网络、输出滤波器降阶等闭环系统不稳定性抑制技术的基础上,提出并研究了一种具有抑制振荡功能的可控阻尼LC输出滤波器。该输出滤波器具有电路结构简洁、易实现、振荡抑制效果明显、损耗低等优点。仿真与试验结果均证实了其可行性。

Instability exists mostly in power electronic converters with close loop feedback control. After compensation network and the instability suppressing technique to lower orders of output filter were analyzed in detail and studied, a novel controlled damping LC output filter with surge suppressing was proposed and studied in this paper. The novel output filter owns the advantages of simple circuit structure, easy realize, strong ability of surge suppressing and low loss. The simulation result and experiment show it is feasible.