变压器差动保护差流异常行为的分析  

Differential current's abnormal analysis of transformer's differential protection

作　　者：张浩 胡文波 张艳 

机构地区：[1]湖北省超高压输变电局,湖北武汉430050 [2]长源电力股份有限公司,湖北武汉430050 [3]湖北省汉川电厂,湖北汉川432321

出　　处：《继电器》2007年第7期70-76,共7页Relay

摘　　要：差动保护是变压器的重要保护,若接线错误,将对系统的安全稳定造成较大的影响。为发现在调试过程中出现的保护装置差流随着负荷的增加明显上升的原因,文章通过对变压器差动保护装置的原理、二次回路、录波图、互感器原理等方面的细致分析,指出电流互感器一次部分的误接线是造成变压器保护装置的差流随负荷增加的根本原因,并从生产和运行等方面探讨变电站应当采取的防范措施。Differential protection is an important protection of transformer. If connecting on transformer is wong,it will influence the safety and stableness on the power system. In order to find out the reason which differential current of transformer＇s differential protection is increasing when load increasing in the process of debugging,through analyzing the principle of transformer＇s differential protection, secondary loop, oscillography＇s current waveform and the principle of current transformer, the basic reason which causes differential current abnormal is the incorrect connection of current transformer＇s primal winding.Last,some counter measures are put forward on substarion＇s production and running.

关 键 词：电流互感器 变压器 差动保护 二次接线 六角图法 

分 类 号：TM407[电气工程—电器]