110kV扩大内桥接线方式二次电压切换回路探讨  

Discussion on secondary voltage switching loop with 110 kV expanded inner-bridge connection mode

作　　者：郭科 王恩宁 GUO Ke;WANG En-ning(State Grid Ningxia Power Design Co., Ltd., Yinchuan Ningxia 750001, China;Ningxia Connection Electric Power Design & Consult Co.,Ltd.,Yinchuan Ningxia 750011, China)

机构地区：[1]国网宁夏电力设计有限公司,宁夏银川750001 [2]宁夏交联电力设计咨询有限公司,宁夏银川750011

出　　处：《宁夏电力》2017年第2期39-42,61,共5页Ningxia Electric Power

摘　　要：针对110 kV扩大内桥接线运行方式的切换导致主变压器高压侧二次电压失压的问题,通过对宁夏电网现有110 kV变电站内桥接线中2号主变压器高压侧二次电压切换回路设计进行分析,提出一种2个继电器配合的改进的二次电压切换回路。应用结果表明:该改进回路能够有效防止2号主变压器高压侧二次电压失压,保障主变安全稳定运行,减少电网企业和用户的经济损失。Aiming at the problem of the110kV expanded inner-bridge connection mode switching leading to the secondary voltage loss at the high voltage side of No.2main transformer,analyzes the design of secondary voltage switching loop at high voltage side of No.2main transformer with expanded inner-bridge connection mode in110kV transformer substations of Ningxia power grid,puts forward an improvement switching loop which has two relays to coordinate switching.The application result shows that the improvement switching loop can effectively prevent the secondary voltage loss of No.2main transformer,ensure the safe and stable operation of the main transformer and reduce the economic loss of the power grid enterprises and customers.

关 键 词：110kV扩大内桥接线 运行方式 二次电压 

分 类 号：TM645.2[电气工程—电力系统及自动化]