閉環反饋控制功率電子變換系統不穩定性抑制技術

摘要：閉環反饋控制功率電子變換系統容易發生不穩定現象。本文在分析研究了補償網絡、輸出濾波器降階等閉環系統不穩定性抑制技術的基礎上，提出并研究了一種具有抑制振蕩功能的可控阻尼LC輸出濾波器。該輸出濾波器具有電路結構簡潔、易實現、振蕩抑制效果明顯、損耗低等優點。仿真與試驗結果均證實了其可行性。 敘詞：輸出濾波器；振蕩抑制；不穩定性；閉環反饋控制 Abstract：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. Keyword：output filter；surge suppressing；instability；close loop feedback control