一起低压配电越级跳闸事例分析

越级跳闸在电力系统特别是低压配电系统中,因为保护级配偏差、管理偏差等问题时有发生,发生越级跳闸事件会使故障进一步扩大,给日常安全生产带来巨大威胁。文章以一起干式变压器跳闸事件为例,详细的分析了故障原因、检查方法以及后续的对策和管理提升手段,可为日常运维管理提供借鉴。

In the power system,especially in the low-voltage distribution system,the over-stage trip occurs from time to time because of the protection gradation deviation,management deviation and other problems,which will further expand the fault and bring a great threat to the daily production safety.Taking a dry-type transformer tripping event as an example,this paper analyzes the fault causes,inspection methods and follow-up countermeasures and management promotion measures in detail,which can provide reference for daily operation and maintenance management.