变压器有载分接开关切换波形研究

波形测试在一定情况下是检查有载分接开关功能的有效方法。触头间的油膜和闭合时触头弹跳会干扰测试结果。微弱的直流电压和由测试电流引起的外施电压降不能击穿油膜,更不会由电弧桥接弹跳缝隙。介绍了有载分接开关切换波形测试原理、方法,指出了匹配电阻、油膜以及触头弹跳对测试波形的影响,提出了正确解读带干扰测试波形的方法。

Study on the Switching Waveform of the Loaded Tap Changer of the Transformer

The waveform test is an effective method that checks the loaded tap changer function under given conditions.The oil film between the contacts and the contact bounces at closing will interefere with the test results.The weak voltage and the applied voltage drop which are caused by the test current can not break down the oil film and can not bridge the bounec gaps by arc,either.The paper presents the test principle and method of loaded tap changer switching waveforms,point out the effect of the matched resist...