电容式电压互感器误差特性的研究

STUDY ON ERROR CHARACTERISTIC OF CAPACITOR VOLTAGE TRANSFORMER

本文对电容式电压互感器的空载误差和负载误差特性进行了研究 ,提出了保证CVT空载误差特性时其变压器的额定磁通密度 (BN)。通过改变CVT中压变压器绕组的布置方式 ,可降低其直流电阻 ,从而改善负载误差特性。

The no load and load error characteristics of CVT are studied in this paper. The rated magneticflux density B N of medium voltage transformer is introduced to control the no load error characteristic of CVT. Through a reasonable winding arrangement of CVT, the DC resistance can be reduced largely, hence the on load error characteristic can be improved. Raising the rated middle voltage is the most effective way to decrease the load error of CVT.