摘要
介绍了一种实时在线变压器铁芯接地故障的监测系统,该系统可同时检测变压器铁芯工频泄漏电流幅值和泄漏电流的高频放电脉冲次数,由二者比较识别变压器铁芯接地状况。本系统安装在南京地铁某主变压器上并进行了现场测试,结果表明该系统测量范围广、灵敏度高、抗干扰强、与现有测控系统易于集成对接,可做为判断变压器铁芯是否存在多点接地的有效方法。
A transfor mer core grounding fault on-line monitoring system based on Labview is introduced. The system can detect the working-frequency leakage current amplitude of the transformer iron core, in the meanwhile,the system can detect the high-frequency discharge pulse number of the leakage current,and by comparison to identify the transformer iro n core grounding conditions. The system is installed on a main transformer of Nanjing Metro and conducted the on-site testing. The testing results show that the system has many advantages such as wide measuring range,high sensitivity,strong anti-interference,easy integration etc.,and can be used as a effective measure to judge whether the transformer iron core exists multi points grounded.
出处
《电气传动自动化》
2015年第6期47-49,57,共4页
Electric Drive Automation
基金
江苏"青蓝工程"基金(RL13002)资助
关键词
变压器铁芯
接地电流
在线监测
安全
transformer iron core
grounding current
on-line monitoring
safety
