基于波形畸变的电流互感器误差分析

The Error Analysis of Current Transformer Based on Waveform Distortion Ratio

电流互感器(TA)饱和是继电保护误动作的主要影响因素。在分析电流互感器误差产生原因的基础上,进一步分析了电流波形畸变特点及衰减直流分量的影响。运用试验数据曲线拟合的方法,提出了基于波形畸变率的电流互感器误差函数模型,为变压器自适应比率制动保护,提供了有效的新方法。

Current transformer＇s saturation is the most important influenced factor of power relays protection＇s real-operation. Based on the causes of current transformer＇s error, further analysised the characteristics of current waveform distortion and the effects of decaying DC component. Apply for the method of test data curve fitting, put forward a function mode of current transformer error based on the rate of waveform distortion,which provided a new method for the transformer protection based on the adaptive braking ratio.