500 kV变压器CT极性确定新方法

A New Method to Determine 500 kV Transformer CT Polarity

文章利用电磁感应定律、楞次定律和磁平衡原理解决现场工程问题,从磁动势角度详细分析了变压器套管CT确定极性新方法,即利用变压器另一侧绕组短接产生的磁动势抵消原磁动势,从而抵消变压器电感作用新方法,工程实践表明,文章论述的方法是正确有效的。

In this paper,electromagnetic induction,Lenz＇s law and magnetic field balance principle were used to solve engineering problems.From the perspective of MMF detailed analysis was made on the new method to determine the transformer bushing CT polarity.This new method is to use the MMF produced by shorted winding on the other side of the transformer to offset the original MMF,eventually offset the transformer inductance.The engineering practice shows that the method presented in this paper is effective.