点击次数：

论文类型：期刊论文

发表时间：2016-10-01

发表刊物：IEEE TRANSACTIONS ON PLASMA SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：44

期号：10

页面范围：2455-2461

ISSN号：0093-3813

关键字：Axial magnetic field (AMF); postarc current (PAC); vacuum switches; voltage distribution (VD)

摘要：This paper investigates the influence of the axial magnetic field (AMF) arc control on voltage distribution (VD) of double-break vacuum circuit breakers (VCBs) in order to gain balanced VD, and thus enhance the breaking capacity. The interaction of vacuum arc plasma, postarc current (PAC), and AMF is discussed. We conduct the breaking test of double-break VCBs with externally applied AMF of a different pulsewidth, magnitude, and a different moment. The PAC, postarc charge, and the VD are measured to analyze the relationship between the AMF arc control and the VD. The optimal AMF arc control and the relationship between the AMF magnitude and the unbalanced voltage ratio are gained when the grading capacitors were 400 pF. The experimental test showed that the proper AMF arc control can improve the unbalanced VD. The mechanism is that the proper AMF arc control can make the postarc charge small and stable, so the unbalanced postarc charge, which caused the unbalanced VD is limited.