220kV变电站倒母线操作时电压互感器反充电异常分析  

Analysis of Counter-charging Anomaly of the Voltage TransformerWhen Reverse Bus Operation for 220kV Substation

作　　者：祁彦威 QI Yan-wei(Shaoguan Power Supply Bureau of Guangdong Power Network Co.Ltd.,Shaoguan 512000,China)

机构地区：[1]广东电网有限责任公司韶关供电局,广东韶关512000

出　　处：《电气开关》2022年第4期101-105,共5页Electric Switchgear

摘　　要：随着电网建设的加快和设备检修维护需要,变电站倒母线的操作也就经常出现。但由于设计、施工的不合理和倒闸操作时因母刀辅助开关切换不到位等原因,曾出现倒母线操作时PT二次空开跳闸,造成母线二次失压。通过对电压互感器反充电引起PT二次空开跳闸的原因进行了详细的分析,提出了相应的防范措施,对防止今后再次发生类似事故,保证倒母线操作的安全性提供了运行经验。With the quickened power network development and equipment service need,the operation of the reverse bus of the substation often happens.For unreasonable design and construction and bus auxiliary switch changing-over can not reach its position at reverse operation,PT secondary empty trip happens at the aerverse bus operation to make the bus secondary undervoltage.For detail analysis on the voltage transformer conter-charging to lead to PT.Secondary empty trip,put forward appropriate countermeasures which provides operation experience to guarantee against the occurrence of similar incidents later and ensure safety of the bus operation.

关 键 词：倒母线 PT反充电 电压切换同时动作 

分 类 号：TM451[电气工程—电器] TM63