一次自耦变压器角接绕组单相反接的故障分析

Analysis of fault caused by reverse connection of D winding in Auto-Transformer

本文介绍了一起因500kV单相变压器的角接端头反接引起的暂态过电流现象,使用电压矢量图从原理上解释过电流产生原因,并据此推导了故障的特征和电流计算方法。通过与实测结果的对比证明该计算方法的合理性,据此对故障后运行决策给出指导意见,最后对类似故障的危害进行了总结。

An over-current fault caused by wrong connection on site is analysis in this paper.Features and current calculated method are studied according to explanation with basic theory.The calculation is approved by comparison with measured value.Based on this,guidance is given for operation decision after failure.The hazard of this kind of fault is summarized.