Impact of abnormality of bus coupler TWJ on dead-zone protection of bus coupler

摘要：

In the testing of bus protection,it is found that the dead-zone protection of coupler will fail to operate when bus coupler TWJ cannot act correctly for the reason of contact adherence or jam.By analyzing of the theory and logic diagram of dead-zone protection of coupler,it is presented that the cause of incorrect action of dead-zone protection of coupler is that the bus coupler current is not excluded from the differential bus protection correctly. A new method is proposed to avoid this defect by the leading-in of bus coupler HWJ,then the improved logic diagram is given and analyzed. The analysis results show that the practical engineering value of this method is great because the rejecting operation of dead-zone protection can be avoided and the operation time of protection can be shortened by using it.

关键词： abnormality of bus coupler TWJ rejecting operation of dead-zone protection differential bus protection

作者: SU Hai-tao HOU Qun-bao DONG Xiao-ping

作者单位: Henan Zhengzhou Electric Power Company,Zhengzhou 450006,China

会议类型: 国际会议

会议名称: 2010年中国国际供电会议(CICED 2010)

会议地点: 南京

会议语种:英文

页码: 1285-1287

在线出版日期: 2010-09-13（万方平台首次上网日期，不代表论文的发表时间）