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论文类型：期刊论文

发表时间：2013-10-01

发表刊物：Journal of Computational Information Systems

收录刊物：EI、Scopus

卷号：9

期号：19

页面范围：7849-7856

ISSN号：15539105

摘要：The vacuum switch with the cup-typed axial magnetic field contacts, of which the advantages are such as lower arc voltage, less contact erosion, large breaking capacity, smaller size, and so on, is widely applied in the AC power system. To utilize it for the DC interruption, this paper analyzed the characteristics of vacuum interrupter with cup-typed axial magnetic field contacts during the DC fault current forced to zero process by using finite element method. The conclusions were obtained as follows: 1) the magnetic flux density in the axial direction (Bz) presents consistency along with the longitudinal direction in gap space, and the largest phase delay in the center of transverse section. 2) After the starting of the arc burning, Bz has an approximately 1-1.5 ms phase delay at first, later is growing proportionally to the fault current increasing rate. 3) As increasing the frequency of the superposed reversed current, the phase delay of Bz is intensified, which result in the value of Bz around the first current zero being very close to the one at the moment of beginning commutation, and it is adverse to the breaking current. ? 2013 Binary Information Press.