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A Hybrid Active Power Filter for Electric-Railway Systems Using Multi-Level Inverters  

김윤호 (중앙대학교 전자전기공학부)
김수홍 (중앙대학교 전자전기공학부)
이강희 (중앙대학교 전자전기공학부)
Publication Information
Journal of the Korean Society for Railway / v.7, no.4, 2004 , pp. 339-344 More about this Journal
Abstract
This paper proposes transformerless power conversion system consisting of a single-phase diode rectifier and a shunt hybrid filter for the electric-railway system. The hybrid filter consists of a single tuned LC filter per a phase and a low-rated NPC type multi-level inverter. Compared with conventional active filters. transformers are not used. Also, LC filter works as not only a harmonic filter tuned at the 3rd harmonic frequency but also a switching-ripple filter. The rating of the active filter can be decreased by using a NPC type multi-level inverter. The simulation results confirm the validity of the system.
Keywords
Hybrid active power filter; Multi-level inverter; Electric-railway;
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  • Reference
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