35kV干式并联电抗器T形双导线局部发热改造  

Local Heating Modification on T-shaped Double Conductor of 35 kV Dry-type Shunt Reactor

作　　者：范国柱 罗微 FAN Guozhu;LUO Wei(Maintenance Branch, State Grid Jiangxi Electric Power Company, Nanchang 330000, China;School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330000, China)

机构地区：[1]国网江西省电力公司检修分公司,江西南昌330000 [2]华东交通大学电气与自动化工程学院,江西南昌330000

出　　处：《电力电容器与无功补偿》2017年第6期83-86,共4页Power Capacitor & Reactive Power Compensation

摘　　要：针对江西电网某500 kV变电站35 kV干式并联电抗器相间T形双导线局部发热现象,采用砂纸打磨接触面、紧固螺栓、酒精擦拭和涂抹导电膏等方法都不能很好地解决发热现象。经过分析发现,由于电抗器磁场的影响,安装的间隔棒的双导线上产生了环流和涡流,导致局部导线及其间隔棒发热严重。针对这一原因对T形双导线进行改造,用LGJQT1400单导线代替原双导线和间隔棒,消除电抗器附近的闭合环路,彻底解决发热问题。As for the local heating circumstance on T-shaped double conductor between phases of 35 kV dry-type shunt reactor at certain 500 kV substation in Jiangxi power grid, it is not solved thoroughly by such method as grinding contact surface with sand paper, tightening bolts, cleaning with alcohol and applying conductive grease etc.. It is found through analysis that the severe heating of local conductor and its spacer is due to the loop current and eddy current from the double conductor of the spacer because of the magnetic field influence of reactor. For this, the T-shaped conductor is modified and the LGJQT1400 single conductor is used to replace original double conductor and spacer, thus the closed loop near reactor is eliminated and the local heating is solved completely.

关 键 词：干式并联电抗器 T形双导线 环流 发热 

分 类 号：TM47[电气工程—电器]