PT回路故障对继电保护的影响及对策  

The Influence of Faults in PT Circuit on Relay Protection and the Countermeasures

作　　者：魏庆伟[1] 张燕[1] 谢斌[1] 林刚[1] 

机构地区：[1]莱芜钢铁集团有限公司热电厂

出　　处：《莱钢科技》2010年第5期77-78,共2页Laigang Science & Technology

摘　　要：PT二次电压回路对变电站二次系统的正常运行起着重要作用，其故障会引起继电保护装置误动或拒动，应用实例分析了PT二次电压回路故障对继电保护的影响，总结盯二次回路故障产生的原因及危害，并提出相应的对策，保证电网的安全。PT secondary voltage circuit plays an important role in the normal operation of the substation secondary system. Its failure will cause malfunction or miss trip of the relaying protector. This paper analyzes the influence of faults in PT secondary voltage circuit on relay protection by means of examples, sums up the causes and harm of failures in PT secondary circuit and proposes the corresponding countermeasures to ensure the safety of power grid.

关 键 词：PT 二次电压故障 保护 对策 

分 类 号：TM933.4[电气工程—电力电子与电力传动]