RCS-915AB型微机母线保护应用改进  

Improvement on the application of RCS-915AB numerical bus-bar protection

作　　者：苏海涛[1] 侯群宝 董孝平[1] 张志宏[1] 李航[1] 李俊华[1] 贾伟[1] 

机构地区：[1]河南郑州供电公司,河南郑州450006

出　　处：《电力系统保护与控制》2009年第21期112-114,118,共4页Power System Protection and Control

摘　　要：针对实际试验中,母线分列运行时,PT二次故障或TWJ异常,若母联死区发生故障,RCS-915AB型微机母线保护装置会出现误动的现象,通过对母联死区保护原理及逻辑框图的分析,发现母差保护误动作的原因是母联电流未正确退出小差电流计算,文中给出了解决以上问题的方法,从而避免了母差保护的误动,缩小了停电范围,具有一定的工程实用价值。This paper introduces the principle of RCS-915AB bus-bar protection.But, in actual debugging, when the fault occurs at dead zone and the bus coupler circuit breaker is disconnected,the voltage of the bus-bar is normal,while there is some problem in the secondary of PT or the TWJ is abnormal,the appliance can＇t cut the fault correctly.By the analyzing of the principle of dead zone protection and its logical diagram,the paper points out the cause of incorrect acting of the appliance is that the current of the bus coupler is in the calculation of the small difference current.The paper proposes a new method, which can avoid the default. It has a certain practical value.

关 键 词：RCS-915AB母线保护 母联死区保护 PT二次故障 TWJ异常 误动 

分 类 号：TM773[电气工程—电力系统及自动化]