一起330 kV线路断路器跳闸事件的分析

Analysis of a Switch Trip Event During the Operation of a 330 kV Line

对一起330 kV线路断路器跳闸事件进行了深入分析,在对一二次设备进行检查后,确定了跳闸事件是由断路器故障引起的。返厂解体检查后发现,断路器磨合后清理不彻底和润滑脂涂敷不当产生的异常磨损物导致内部气隙击穿放电,最终发生断路器绝缘故障。文章对厂家在环节把控、设备验收试验环节提出一些可行的建议和改进措施,这些举措旨在确保电网的安全稳定运行,为类似事件的预防和处理提供有益的经验和启示。

In this paper,an in-depth analysis of a switch trip event during the operation of a 330 kV line was carried out.After the inspection of the first and second devices,it was determined that the trip event was caused by the switch fault.After further inspection,it was found that the abnormal wear caused by the incomplete cleaning of the circuit breaker after run-in and improper application of grease led to the breakdown and discharge of the internal air gap.Finally,the circuit breaker insulation failure occurred.This paper puts forward some feasible suggestions and improvement measures for manufacturers in the link control and equipment owner acceptance test.These measures aim to ensure the safe and stable operation of the power grid,and provide useful experience and inspiration for the prevention and handling of similar incidents.