电压加法在直流高压分压器电压系数测量中的应用  

Voltage Summation Method for Determing the Voltage Dependence Ratio Variation of Precise High DC Voltage Dividers

作　　者：王乐仁 章述汉 

机构地区：[1]国家高电压计量站,武汉430074

出　　处：《计量学报》2003年第1期45-48,59,共5页Acta Metrologica Sinica

摘　　要：用标准分压臂插入法测量直流分压器的误差 ,不确定度难以达到 10 - 4量级。到目前为止 ,高准确度的直流高压分压器的电压系数 ,只能用影响量分项评估方法综合 ,不能给出实际值。应用直流电压加法技术 ,可用计量测试手段实测直流高压分压器在各个工作电压下的误差和不确定度。对 5 0 0kV等级测量结果的不确定度可达到 1 1× 10 - 5。Resently, the uncertainty of voltage ratio of a precise high DC voltage divider is determined by estimating the effects such as high voltage field, leakage currents, corona, temperature, ratio measurement at low voltage. By means of standard arms injection to measure the voltage dependence ratio variation, the uncertainty is hardly at the range of 10 -4 . The DC high voltage summation method is developed for measuring the voltage dependence ratio variation. As a result, for an experamental 500 kV DC voltage divider, the uncertainty is only 1 1×10 -5 .

关 键 词：计量学 直流电压 电压加法 高压分压器 

分 类 号：TB971[一般工业技术—计量学]