基于LABVIEW变压器铁芯接地故障在线监测系统

Transformer Core Grounding Fault Monitoring System Based on LABVIEW

一种实时在线变压器铁芯接地故障的监测系统,系统在检测变压器铁芯工频泄漏电流幅值同时检测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。该系统在南京地铁某主变压器安装并进行了现场测试,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,判断变压器铁芯是否存在多点接。

This paper introduces a real-time online of transformer core earth fault monitoring system, the system of leakage current in the detection of transformer core frequency and high frequency discharge pulse number detecting leakage current, compared to two by the accurate identification of transformer iron core earthing condition. The system in Nanjing Metro Co., a main transformer installation and on-site testing, the results show that the measuring range of the system wide, high sensitivity, strong anti-interference, easy integration with the existing control system of butt, can be used as a judgment whether there is connection transformer core effective multi point.