基于内桥接线方式的变电站电流二次回路现场调试问题分析  

Analysis of Secondary Current Circuit Debugging in Substation with Internal Bridge Connection

作　　者：郭晓春 

机构地区：[1]鄂尔多斯电业局,内蒙古鄂尔多斯017000

出　　处：《内蒙古电力技术》2013年第1期25-29,共5页Inner Mongolia Electric Power

摘　　要：近年来,110 kV城区变电站建设为了节省占地面积,GIS设备数量越来越多,其110kV部分主接线以内桥接线方式居多,而且某些变电站的进线在特殊情况下还兼做出线使用,这就需要正确使用电流互感器的二次绕组。针对内桥接线方式的变电站在调试过程中遇到的主变压器保护、线路保护、桥断路器保护电流的选择,保护、测量、计量用电流互感器二次绕组准确度等级的选择方法,进线及内桥电流互感器各二次绕组的极性选择等问题进行了分析,并举例说明了内桥接线变电站的主变压器保护、线路保护带负荷试验的方法。In recent years, the 110 kV substations in city in order to reducing the occupied area, GIS is used more and more,the main electric connection modes are mostly internal bridge connection, and some of the transformer substations incoming line in special cases, and make use of outgoing line, this needs correct use of the secondary winding of current transformers. In this paper, the issues that require more attention in debugging are discussed, such as the current selecting method for main transformer protection, line protection and bridge breaker protection, the accuracy class selecting method for secondary windings in current transformer used in protection, measurement and calculation circuit, the polarity selecting method for secondary windings in current transformers of line and internal bridge, the mothod is introduced and an example is given to illustrate the method of main transformer protection and line protection on-load test in substation with internal bridge connection.

关 键 词：变电站 内桥接线 电流二次回路 电流互感器 准确度等级 绕组极性 带负荷试验 

分 类 号：TM63[电气工程—电力系统及自动化]