Adjustable harmonic filters for traction supply systems

Abstract

Problems of design for controlled filtering and compensation systems (FCS) for railway AC traction systems are considered in
this paper. The proposed FCS ensures discrete reactive power compensation by switching of filter section. A broadband 3–5
order passive filters (BBF) are used as a commutated sections. A general BBF design procedure, based on performance optimization in the space of reactive elements parameters, is developed. The proposed filtering system provides reactive power compensation and harmonic mitigation in wide frequency band. The effectiveness of proposed solution has been confirmed by computer simulation.