关键词: 故障限流器, 饱和电抗器, 磁饱和型, 超导, 永磁

Abstract: Both the advantages and disadvantages of traditional fault current limiting technology were analyzed. The analysis indicates that development of a new fault current limiter with economical and technological excellence was significant and urgent for present day power grids. With reference to the general operation principle of the saturated reactor, different topologies, and key obstacles encountered in engineering applications of the super conducting saturable magnetic core fault current limiter (SMFCL) were elucidated. Permanent magnetbiased saturated iron core fault current limiters (PMFCL) of various topologies were compared during their evolution process. Further, three novel topologies for threephase PMFCL were presented. Finally, four principal technological issues were raised with relative elucidation with regards of the optimal structure design of PMFCL.

Key words: fault current limiter, saturated reactor, saturated iron core, superconducting, permanent magnet