500kV变电站主变套管闪络跳闸事件故障分析

Fault Analysis of the Flashover Trip Event of the Main Transformer Bushing in a 500kV Substation

本文分析了一起某500kV变电站主变套管闪络跳闸事件。通过故障现场分析,结合设备情况、一次设备检查情况及二次信息检查情况,根据前期该类型设备发生类似异常的原因进行事故分析总结。此次事件发生的原因不仅与极端天气条件有关,还与设备状态有关。本文针对此类事件作出分析并提出了处理和改进的措施,避免此类事件的再次发生,有效地提高了变电站的安全稳定运行能力。

This paper analyzes a bushing flashover trip event on the main transformer of a 500kV substation.Through fault on-site analysis, combined with the equipment conditions, operation mode before fault happens, primary equipment inspection and secondary information inspection, combined with the causes of similar abnormalities in this type of equipment in the early stage, the accident analysis and summary are summarized.The reason for this incident is not only related to the extreme weather conditions, but also related to the status of the equipment.In view of this incident, this article analyzes and proposes measures for handling and improvement to avoid the recurrence of such incidents and improve the ability of the stable and safe operation of the substation effectively.