750kV罐式断路器内部单相接地故障的保护动作行为分析

Analysis of an A-phase earth fault of a 750kV pot-type breaker internal

对一次典型的罐式断路器内部A相接地短路故障进行了分析,主要通过介绍系统接线方式、单相接地短路时的短路电流计算、故障录波图的分析、保护装置动作报文分析等几个方面,希望能够加强超高压继电保护工作者对750kV罐式断路器CT配置、保护功能配置、简单的故障分析等知识的掌握,对广大继电保护工作者日常分析事故能有所帮助。

This paper analyzes an A-phase earth fault of a typical pot-type breaker internal. It mainly introduces the system＇s wiring way, short-circuit current calculation of single-phase earth fault, the analysis of the fault recorder diagram and the protective equipment tripping report, and so on. Hoping through the introduction above, it can strengthen the grasp of the knowledge of the 750kV pot-type breaker CT and the protection functional distribution and the analysis of simple fault for the extra high voltage protective relaying workers, to help to analyze the daily accident for the protective relaying workers.