500kV主变压器保护动作异常分析

Analysis of Anomalous Operation of 500 kV Main Transformer Protection

介绍变电站主变压器开关三相不一致保护的配置及变电站主接线方式情况。在一次设备停电检修操作过程中,由于保护设计缺陷以及现场设备质量原因,导致三相不一致保护动作,引起设备跳闸事故,对事故原因展开具体分析,提出避免此类事故再出现的具体反事故措施。

This article describes a configuration switch three phase inconsistent protection of main transformer in substation and substation connection mode. During a device outage maintenance operations, because of the protection of design defects and the reason for on-site equipment quality, leading to three phase inconsistent protection, and causing device tripping. Causes for the accident are analyzed, and the specific anti-accident measures are given.