一起4星形电压互感器零序电压反充电事故分析

Zero Sequence Voltage Anti-Charging Incident Analysis of 4-Star Connection Potential Transformer

介绍了一起4星形电压互感器零序电压反充电事故处理过程,并对事故原因进行了分析,该事故因电压并列回路误接线引起,在10 k V系统单相接地时发生。考虑到该事故因变电站扩建时误接线引起,对类似扩建工程二次施工提出了合理施工方案,以避免类似事故发生。

Introduction was made to a case of zero sequence voltage anti-charging incident of 4-star connection potential transformer （PT） and analysis was made to the accident cause. The incident caused by the false wiring of voltage parallel circuit happened when single phase was grounding in 10kV system. Considering the incident was due to false wiring at the time of substation expansion, this paper proposed the reasonable construction scheme for the secondary circuit construction of similar expansion project to avoid the occurrence of similar incidents.