Research on single-phase-to-earth fault section location in coal mine high-voltage power supply system
In allusion to single-phase-to-earth fault location in coal mine high-voltage distribution network,a new scheme of fault location was proposed,which based on abrupt change of zero-sequence current and grid structure matrix using that zero-sequence current amplitude of fault lines is larger than non-fault lines.In this method,through analysis of amplitude change ratio between the fault lines and non-fault lines,and when the ratio is larger than the threshold,fault lines are determined.Fault character vector is designed according to the ratio,and then combine with the grid structure matrix to design fault message character matrix,finally locate the fault zone.The experiment results show that this method can achieve vertical selective grounding protection of high-voltage power grid of coal mine.
zero sequence transient current fault section locating mine high-voltage power network single-phase grounding fault
Wang yanwen Zhang Li
School of Mechanical Electrical and Information Engineering China University of Mining and Technology(Beijing),Beijing 100083,China
国际会议
重庆
英文
1579-1583
2017-03-25（万方平台首次上网日期，不代表论文的发表时间）