继电保护受电流互感器饱和的影响及防误动措施  

The Effect of Current Transformer Saturation on Relay Protection and Related Countermeasures

作　　者：陈宏山[1] 余江[1] 周红阳[1] 

机构地区：[1]中国南方电网电力调度控制中心,广州510623

出　　处：《南方电网技术》2013年第1期65-67,共3页Southern Power System Technology

摘　　要：分析了电流互感器饱和的机理及其对继电保护的影响,包括对差动保护、距离保护、过流保护和零序保护的影响。通过分析电流互感器饱和影响继电保护的RTDS动模试验结果,得出如下结论:电流互感器饱和可能引起差动保护误动,缩小距离保护的范围,降低过流保护和零序保护的灵敏度。提出了防范电流互感器饱和导致继电保护误动的措施。The mechanism of current transformer saturation and its effct on the relay protection are analyzed in this paper, including that on the differential, distance, overcurrent and zero sequence protections. By analyzing the RTDS dinymic simulation results, it is concluded that the current transformer saturation could lead to a misaction of the differential protection, narrow the range of distance protection, reduce the sensitivity levels of overcurrent and zero sequence protections. The related countermeasures are also proposed.

关 键 词：电流互感器 饱和 继电保护 

分 类 号：TM771[电气工程—电力系统及自动化]