交直流互串导致灭磁开关误动原因分析及防范措施  

Analysis of the Malfunction of the Excitation Switch Caused by Crosstalk of the AC and DC and Its Preventive Measures

作　　者：周国平[1] 张炯 李辰龙[1] 蒋琛[1] 

机构地区：[1]江苏方天电力技术有限公司,江苏南京211102 [2]上虞市电力公司,浙江上虞312300

出　　处：《江苏电机工程》2013年第5期10-12,共3页Jiangsu Electrical Engineering

摘　　要：继电保护装置误动给电力系统的安全稳定运行造成了严重的影响,其中交直流电源串扰是造成保护误动的主要原因之一。介绍了某发电厂一起因交流串入直流导致灭磁开关误跳,从而造成机组停机的事故,分析了交流电串入直流控制回路是造成该次灭磁开关误动的主要原因,并从设计、施工、试验等环节提出了防范措施。Malfunction of the protection devices caused a serious impact on the power system, especially its safe and stable operation. Crosstalk of the AC and DC power is the main factor that caused the malfunction of the protection devices. An unit outage caused by a mistakenly jump of the excitation switch in a power plant is described, as a result of the AC into DC control loop. Also the preventive measures are proposed from the design, construction, testing and other aspects.

关 键 词：直流控制回路 交直流串扰 开关误动 防范措施 

分 类 号：TM773[电气工程—电力系统及自动化]