一起电子互感器异常引发的复杂发展性故障分析及改进  

Analysis and optimization for complex developing faults caused by abnormal electronic transformers

作　　者：吴路明[1,2] 薛明军 陈琦[1,2] 王永旭 唐治国[1,2] 陈宏岩 WU Luming;XUE Mingjun;CHEN Qi;WANG Yongxu;TANG Zhiguo;CHEN Hongyan(Guodian Nanjing Automation Company Limited,Nanjing 210003,China;Nanjing SAC Power Grid Automation Company Limited,Nanjing 211153,China)

机构地区：[1]国电南京自动化股份有限公司,南京210003 [2]南京国电南自电网自动化有限公司,南京211153

出　　处：《华电技术》2020年第6期10-15,30,共7页HUADIAN TECHNOLOGY

基　　金：中国电机工程学会青年人才托举工程项目(CSEE-YESS-2017)。

摘　　要：随着智能数字化变电站的兴起,电子式互感器在继电保护领域得到了越来越多的应用,但其缺陷也渐渐暴露,介绍了一起变电站中由于电子式互感器异常引发的复杂发展性故障,对故障的过程和原因进行了介绍和探讨。通过分析现场使用的各种保护装置的采样异常逻辑和处理方案,依次对故障后的保护装置动作行为进行了详细的分析及探讨,分析认为目前电子式互感器的可靠性有待进一步提高。在此基础上提出了线路保护选相逻辑的优化方案,经仿真验证,方法可行,可以在复杂发展性故障发生时有效提高智能变电站保护装置的可靠性。With the rising of smart substations,electronic transformers have been widely used in relay protections,but their defects are gradually exposed.A complex developing fault caused by abnormal electronic transformer was introduced,and the process and reasons for this failure were analyzed.By analyzing the abnormal sampling visit(SV)criterion and solutions for different protections on site,the operation of protection devices after the fault was detailed and discussed.It is believed that the reliability of the current electronic transformer needs to be further improved.On this basis,an optimization scheme for phase selection logic in the line protection is proposed and be proved to be feasible by a simulation test.The scheme can be applied in complex developing faults to improve the reliability of smart substations.

关 键 词：智能变电站 电子式互感器 采样异常 线路保护 

分 类 号：TM772[电气工程—电力系统及自动化]