Abstract：In order to accurately evaluate the electric energy meter measurement error in real load test, according to the electric energy meter working principle and the measurement uncertainty evaluation, this paper analyzes the influence of uncertainty of direct measurement and clamp measurement on the error of electric energy meter field inspection. Through the analysis of the electric energy meter field test cases based on the direct measurement method and the clamp meter method, the following conclusions are drawn. The error of electric energy meter for class 0.5(S) and above field inspection does not need to consider the influence of measurement uncertainty because the expanded uncertainty is less than 1/3 of the maximum allowable error in direct measurement. When the error measured with clamp, the error of the meter should be considered because the expanded uncertainty is greater than 1/3 of the maximum allowable error.
周亚群, 张钢, 章春香, 刘欢, 王志浩. 测量不确定度在电能表现场检验中的应用[J]. 电气技术, 2021, 22(11): 80-83.
ZHOU Yaqun, ZHANG Gang, ZHANG Chunxiang, LIU Huan, WANG Zhihao. Application of measurement uncertainty in field inspection of electric energy meter. Electrical Engineering, 2021, 22(11): 80-83.
2021, Vol. 22 
