新型永磁励磁型饱和铁芯故障限流器

A Novel Permanent-Magnet-Biased Saturated-Core Fault Current Limiter

应用饱和铁芯故障限流器(saturated-core fault current limiter,SCFCL)是限制系统短路电流的最有效措施,为解决传统SCFCL直流励磁损耗大的难题,提出了一种新型永磁励磁型饱和铁芯故障限流器(permanent-magnet-biased saturated-core fault current limiter,PSFCL)o本文利用等效磁路、等效电路对该新拓扑进行研究分析,并进行相关参数设计,通过搭建基于Maxwell-3D的有限元电磁仿真模型,证明所提新型拓扑可有效限制故障电流,并通过样机试验进一步验证所提结构的有效性与理论的正确性。

Applying saturated-core fault current limiter(SCFCL)is one of the most useful measures for limiting fault currents in power systems.In order to reduce the high excitation energy consumption,this paper introduces a new structure of a permanent-magnet-biased saturated-core fault current limiter(PSFCL).The PSFCL is analyzed by using an equivalent magnetic circuit and electric circuit.The parameter design of PSFCL is also introduced in the paper.The FEA model of PSFCL is established and performed in Maxwell-3D.The simulation result verifies that the proposed PSFCL can limit fault current effectively.The experimental result obtained from a prototype validates the effectiveness of the proposed structure and the method.