电力系统保护与控制2011，Vol.39Issue(2)：152-154,3.
内桥接线变压器保护电流回路接线方式的探讨
Discussion on current circuit of transformer protection with internal bridge connection
摘要
Abstract
The high voltage side current of main transformer differentiai protection may be obtained by method of sum current of section switch and line switch in internal bridge connection.Mai-operation of differential protection occurs when external short-circuit or CT break happens in high votage side of transformer.The reasons of mai-operation lie in that the sum current of line switch and section switch is not finished in internal software of protection device, which lead to the inconsistency between secondary current felt by protection device and the high voltage side current of main transformer, therefore, the correct latch-up protection can not be realized, as external short circuit or CT break occurs.The method that currents of section switch and line switch joining to differential protection separately is introduced, proceedings of protection operation program are presented as well.关键词
差动保护/二次回路/CT断线/内桥接线/外部短路Key words
differential protection/ secondary circuit/ CT break/ internal bridge connection/ exeternal short circuit分类
信息技术与安全科学引用本文复制引用
周建军,樊庆玲,樊高瑞..内桥接线变压器保护电流回路接线方式的探讨[J].电力系统保护与控制,2011,39(2):152-154,3.
