Method to Evaluate the Resistance–Capacitance Voltage Divider and Uncertainty Analysis

Energies

Bin Guo¹  Lijuan Xu¹  Xingxing Feng¹  Yi Luo²  Fusheng Li²  Bin Qian²  Fan Zhang² 

[1] Guangzhou Power Supply Bureau, Guangzhou Power Grid Co., Ltd., Guangzhou 510730, China;Institute of Metrology Technology, Electric Power Research Institute, CSG, Guangzhou 510663, China;

关键词: voltage divider;    resistance and capacitance parameters;    uncertainty of measurement;   

DOI  :  10.3390/en14227744

来源: DOAJ

【 摘 要 】

The resistance and capacitance parameters of a resistance–capacitance divider may change due to factors such as long-term operation, internal insulation flashover, and dielectric breakdown, which will affect the measurement characteristics of the resistance–capacitance divider. Since it is difficult to separate the voltage divider, and because improper disassembly will damage the insulation of the equipment, measuring the resistance and capacitance parameters of a voltage divider non-destructively has always been a problem. In this paper, an indirect method for evaluating the resistance and capacitance parameters is proposed, and the uncertainty of measurement of this method is determined. Simulation and actual test results show that this method can be used to estimate the resistance–capacitance parameters and has a good level of measurement accuracy. Besides, through the uncertainty analysis, it is concluded that the proposed method can overcome measurement errors within a certain range and has high practicability. Finally, a very practical application scenario of the proposed method is given, showing that the proposed method has good economic significance.

【 授权许可】

Unknown