摘要
分析了电气设备剩余电压测试仪基本原理,提出一种基于标准阻容网络法对剩余电压测试仪剩余电压幅值和延迟时间参数进行校准的方法。结合交流标准电阻器和电容器等效模型,分析了标准电阻时间常数和标准电容损耗因数对校准结果的影响,推导了校准时剩余电压和延迟时间标准值的计算方法。采用1 MΩ交流标准电阻和1μF标准电容器组成的电路网络对剩余电压测试仪进行了校准,结果表明标准阻容网络法可满足该仪器的校准。对测量结果进行了不确定度分析,剩余电压幅值测量不确定度为1.1%,延迟时间测量不确定度为1.2%,主要不确定度分量为标准电容器损耗因数的影响。
The principle of the residual voltage tester for electric equipment is analyzed.A method for calibrating the residual voltage amplitude and delay time parameters of the tester based on the standard resistance-capacitance network method is proposed.The influences of the time constant of the standard resistor and the loss factor of the standard capacitor on the calibration results are analyzed based on the equivalent model of the impedance components.The calculation method of the reference value of residual voltage and delay time is derived for the calibration.The residual voltage tester is calibrated by using a circuit network composed of a 1 MΩAC standard resistor and a 1μF standard capacitor and the results show that the mentioned method meets the calibration for the tester.The uncertainty analysis of the measurement results is carried out.The expanded uncertainty for the residual voltage amplitude is 1.1%and 1.2%for the delay time.The main uncertainty component is the measurement uncertainty of the loss factor of the standard capacitor.
作者
冯建
胡俊杰
许峰
周碧红
Equipment FENG Jian;HU Junjie;XU Feng;ZHOU Bihong(Shanghai Key Laboratory of On-line Testing and Control Technology,Shanghai Institute of Measurement and Testing Technology,Shanghai 201203,China)
出处
《计量学报》
CSCD
北大核心
2024年第5期626-630,共5页
Acta Metrologica Sinica
基金
国家市场监督管理总局科技计划项目(2022MK025)
上海市市场监督管理局科研项目(2023-06)。
关键词
电学计量
剩余电压
延迟时间
阻容网络
损耗因数
不确定度
electrical metrology
residual voltage
delay time
resistance-capacitance network
loss factor
measurement uncertainty
