论文部分内容阅读
宁启铁路六合牵引所采用平衡变压器作为主变,在电气化改造四电验收过程中,机车热滑引起主变差动保护动作跳闸导致停电事故。对主变本体、差动保护装置和保护回路接线等进行检查,并对原理图和接线图进行审查,对主变差动保护动作的两次跳闸故障报文进行分析计算,查明误动作原因并进行理论探讨。首先对主变差动保护动作现象进行了概述,并分析主变差动保护的基本原理,在此基础上分析了主变差动误动作的具体案例,并得出该跳闸事故的具体原因。
Ningqi Railway Luhe traction balance transformer used as the main transformer in the four electrification transformation process of acceptance, locomotive thermal slip caused by the main transformer differential protection tripping action led to power outages. Check the main transformer body, differential protection device and protective circuit wiring, and check the schematic diagram and wiring diagram, analyze and calculate the two trip fault messages of the differential protection action of the main transformer to find out the cause of the malfunction And theoretical discussion. First of all, the main transformer differential protection action phenomenon is summarized, and the basic principle of differential protection of the main transformer is analyzed. Based on the analysis, the concrete case of the differential transformer fault operation is analyzed, and the concrete reason of the tripping accident is obtained.