The period verification procedures of smart meter calibration equipment require the suspension of the routine detection process

and it is difficult to increase the verification frequency and difficult to timely uncover the inaccuracy of smart meter calibration equipment. To solve this problem

this paper proposes a new online verification method of smart meter calibration equipment. Based on central limit theorem and Bayes hierarchical model

this method utilizes real-time detection data of same-batch smart meters and constructs a high-accuracy virtual standard meter. Through this virtual standard meter

the measurement error of the calibration equipment is verified online and the verification of smart meter calibration equipment under the detection process of smart meters is accomplished. In addition

the results of simulation tests and field experiments show frequent verification tasks can be accomplished without affecting the routine calibration process

thus demonstrates the superiority of this method under large-scale automatic detection mode.