電容中點式三相四線制APF 中直流側(cè)電容的選擇

摘要：三相四線制APF 中，采用電容中點式拓撲，直流側(cè)電容上要流過很大的電流，對直流側(cè)支撐電容的耐流能力要求很高。本文以一臺30kVA 的三相四線制電容中點式APF 為例，通過對比分析，證明了在電容中點式APF 中，選擇薄膜電容比電解電容要更適合。 敘詞：有源電力濾波器，三相四線制，薄膜電容，仿真和實驗 Abstract：In the split-capacitor of three-phase four-wire APF, current flows through the DC_link capacitor, so demand the DC_linkcapacitor high current capacity. In this paper, a 30kVA three-phase four-wire capacitor APF, for example, by comparing the analysis toprove that film capacitors to be more suitable than electrolytic capacitors. Keyword：Active power filter, Three-phase four-wire, Film capacitor, Simulation and experimentTN97 A 1561-0349201302-0039-