长沙地铁轨道交通对交流电网的影响及治理措施的研究  

Research on influence and control measures of metro rai transit on AC network in Changsha

作　　者：刘味果[1] 周卫华[1] 叶会生[1] 彭平[1] 吴晓文[1] 

机构地区：[1]国网湖南省电力公司电力科学研究院,湖南长沙410007

出　　处：《湖南电力》2017年第1期7-9,13,共4页Hunan Electric Power

基　　金：国网湖南省电力公司科技项目(5216A5160033)

摘　　要：在城市地铁轨道交通中,供电牵引网采用直流供电方式,部分牵引电流经钢轨泄漏到地下形成杂散电流,引起周边电力变压器产生直流偏磁现象。文中分析了地铁轨道交通对变压器的影响,通过采用电容隔直方式抑制变压器中性点直流电流,有效解决了变压器直流偏磁问题,保障了主变运行安全。In the urban metro rail tran s it , rail traction generally adopts DC power supply. When part of traction direct current leaking into the earth by steel rail , stray current are formed, which brings on transformer DC bias in the nearby substation. In this paper, the influence of metro rail transit on the transformer is analyzed. And by connecting DC-isolation capacitor in series with the neutral of the transformer, DC current has been eliminated and safe operation of the transformer has been ensured.

关 键 词：地铁轨道交通 杂散电流 直流偏磁 变压器 

分 类 号：TM721[电气工程—电力系统及自动化]