摘要
110 kV精密电压互感器根据变比不同采用2种不同的不确定度评定方式。对主变比按照JJF 1067—2014 《工频电压比例标准装置校准规范》要求采用参考电势法得到20%额定电压及以下误差值;采用串联加法得到电压系数曲线,按照规定算法推算出20%以上额定电压误差值。对所有数据进行6次重复性测量,从4个方面进行不确定度评定,计算出合成标准不确定度和扩展标准不确定度,为220 kV和500 kV标准电压互感器误差测量和不确定评定打下基础。
According to the different variable ratio,110 kV precision voltage transformer uses two different kinds of uncertainty evaluation methods.To main variable ratio,according to JJF 1067-2014<voltage ratio standards at power frequency>calibration specification,it refers potentiometric method to get 20%and downward rated voltage and error value.It refers the series addition method to get the voltage coefficient curve which more than 20%according to the algorithm.6 repeatability measurements are carried out for all data and it assess the uncertainty in 4 aspects.The synthetic standard uncertainty and expanded standard uncertainty are calculated which lay the foundation for error measurement and uncertainty evaluation of 220 kV and 500 kV standard voltage transformers.
作者
刘罡
常源
冮若嘉
禹加
房琛
LIU Gang;CHANG Yuan;GANG Ruojia;YU Jia;FANG Chen(Electric Power Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang,Liaoning 110006,China;Dalian Electric Power Construction Engineering Co.,Ltd.,Dalian,Liaoning 116021,China)
出处
《东北电力技术》
2019年第1期34-37,62,共5页
Northeast Electric Power Technology
关键词
工频电压比例标准
主变比
精密电压互感器
不确定度评定
voltage ratio standards at power frequency
main variable ratio
precision voltage transformer
uncertainty evaluation
