高压计量装置一体化校验系统不确定度评定

Measurement Uncertainty Evaluation of Integrated Calibration System for High Voltage Metering Device

摘要: 目前出现的高压一体化计量装置克服传统计量装置的种种弊端，正逐渐代替现有的计量装置，其校验和测试工作也引起广大研究人员的关注。但是对于传统型高压电能计量装置，它的误差采用综合误差法计算得到，这样计算得到的误差并不符合国际电工委员会规定的基本原则。本文在一体化误差校验系统的设计基础上，利用计量学中的不确定度理论，对高压计量装置一体化误差校验系统的不确定度来源分析，提出系统的不确定度评定方案，并给出具体分析计算过程，获得电能计量误差的扩展不确定度，得到电能计量误差的完整表达。不确定度评定对于校验系统提高评价测量结果的可信度有重要的意义，同时也为电能计量装置综合性能评估提供了量化的依据。

Abstract: Existing integrated high voltage metering device overcame the drawbacks of traditional metering device. It replaced the existing metering device. Its calibration and testing also aroused concern of the majority of researchers. But for the traditional high-voltage energy metering device, its error is calculated by the synthetic error method. The error calculated in this way is not in conformity with the basic principle stipulated by the International Electrotechnical commission. In this paper, on the basis of integrated calibration system design, it makes use of uncertainty theory to analyze uncertainty sources in high voltage metering device integrated calibration system. It gave complete uncertainty evaluation program and calculation process. It got expanded uncertainty of the power measurement error and got the final complete energy metering error. By calibration sys- tem uncertainty assessment, the reliability of measurement results can be evaluation within reason. It provided a quantitative basis for energy metering device performance evaluation.