Discussion on Abnormal Rise of Displacement Voltage of Neutral Point in Compensation Electric Network and its Control Measures

摘要

Reasons and harm of abnormal rise of displacement voltage of neutral point in compensation electric network are analyzed and discussed deeply. It is put forward that the reasons of abnormal rise of displacement voltage of neutral point in the compensation electric networks are the problem of the structure of arc-extinguishing device and the effect on tracing tuning and operation manners, the network structure and operation of electric network on displacement voltage of neutral point in compensation electric networks in this paper. Abnormal rise of displacement voltage of neutral point affects the security and stability of electric network and causes unfavorable influence on insulation of rise phase. Being serious, it will affect that arc-extinguishing device is put into operation normally. The composite control measures of abnormal rise of displacement voltage of neutral point in compensation electric networks are studied and discussed from the aspects of the structure of arc-extinguishing device, the voltage adjustment of grounding transformers, selecting appropriate damping resistance, adjusting automatic tracing tuning manners, controlling residual current properly and operation of electric networks, etc. Based on these, the problem of abnormal rise of displacement voltage of neutral point in compensation electric networks is solved.