一起由TA短路故障引起得主变差动保护动作分析

Analysis on Differential Protection Trip With the Main Transformer Which Caused by the Short Circuit Fault of Current Transformer

在电力系统运行中,大型电力变压器是造价昂贵的核心设备之一。因此,对变压器进行有效的保护,防止变压器损坏变得至关重要。本文对某升压站主变差动保护动作进行了探讨,详细分析了保护动作情况,并开展了绝缘电阻试验、直流电阻试验、伏安特性曲线测试和变比试验等,结合理论分析推断出事故跳闸原因,希望能为相关工作人员的工作提供参考。

In the operation of electrical system,the main transformer is one of the most expensive and important equipment.Therefore,how to prevent the main transformer from damaging through effective protection become increasing important.This paper discuses a differential protection trip with the main transformer,through resistance insulation test,DC resistance test,volt-ampere characteristic test and ratio test,and also considering the theoretical analysis to make the final conclusion.Hope this paper could have referential value to industry peers.