电流互感器10%误差曲线绘制的实验方法分析

An Analysis on the Experimental Method of 10% Error Curve of Current Transformer

为严防由于电流互感器饱和倍数与二次阻抗不匹配引起的差动保护误动作,开展了对电流互感器10%误差曲线特性试验方案和曲线绘制的探讨,制定了一套成熟的试验方案,分析了电流互感器10%误差的产生根本原因,并利用Excel软件辅助分别绘制了220 kV的鼓山变电站和500 kV的晋江变电所的10%、5%误差曲线,为电流互感器的误差计算提供借鉴。

In order to prevent the saturation of current transformer ratio and two impedance mismatch caused by the malfunction of dif- ferential protection, the paper has developed to the current transformer 10% curve of error characteristics test plan and the curve plan dis- cussion, has formulated a set of mature experimental plan, and has analyzed the basic reason that current transformer 10% error product. The paper use Excel software to aid the 220kV substation of Mount Drum to draw 10% error curve and the 500kV substation of Jinjiang to draw 5% error curve. The results could provide reference for the calculation error of current transformer.