500 kV主变后备保护联跳分段开关的二次回路改进建议 

欧俊延 
(中国南方电网超高压输电公司柳州局，广西 柳州 545006) 
 

摘 要： 双母双分段220 kV 母线接线方式在倒闸操作等特殊运行方式下，提高了保护拒动或误动的风险。在分析了接入刀闸辅助接点来自动切换跳闸回路的基础上，提出了一种基于保护装置平台的改进思路，即在跳闸逻辑中增加刀闸位置的判据。该方法在微机保护装置中简单易行，便于现场人员快速判断刀闸辅助接点的分合以及整个跳闸出口回路的完好性、正确性，提高了变压器后备保护的可靠性。
关键词： 变压器保护；分段开关；后备保护；辅助接点；跳闸判据
中图分类号：TM645.2 文献标识码：B 文章编号：1007-3175(2015)01-0029-03

Secondary Circuit Improvement Suggestion of 500 kV Main Transformer Standby Protection Shunt Tripping Subsection Switch 

OU Jun-yan 
（Liuzhou Electric Power Bureau, EHV Transmission Company, Liuzhou 545006, China） 
 

Abstract: Under tripping operation etc special running modes, the 220 kV bus bar connection method of double bus bar double subsection had raised protection misguiding or mis-tripping risks. On the basis of analyzing automatic switching tripping circuit connected by auxiliary contractors, this paper raised an improved idea based on protection device platform, that was to say that a judgment of tripping logic was added into knife blade position. The method is simple and easy in microcomputer protection device, easy for onsite working personnel to quickly judge making and breaking of knife blade auxiliary contractors, as well as the integrality and correctness of entire tripping, which raises the transformer standby protection reliability.
Key words: transformer protection; section switch; rear protection; auxiliary connection point; tripping judgment

参考文献
[1] 杨剑.220 kV双母联双分段母线保护接线分析[J].湖南电力，2008，28(6)：16-18.
[2] DL/T 684-2012 大型发电机变压器继电保护整定计算导则[S].
[3] DL/T 317-2010 继电保护设备标准化设计规范[S].