Error Correction Method for Smart Energy Meter Field Calibration System under Non-standard Conditions

Smart energy meters have been widely used in the smart grid of various countries, but the current measurement methods of smart energy meters can not solve the traceability problem under the actual load current and power factor in the process of use, which leads to the inaccuracy of only meters in the field environment, and there is an unknown measurement risk. In order to achieve the accurate on-site verification of smart energy meters in normal working conditions, this paper studies the accuracy of smart energy meter field calibration standard device under different current and power factors, develops the error correction method under non-standard conditions. The correction method adopts the method of establishing reference standard value arrays under non-standard conditions to achieve fast and accurate on-site verification and effective measurement performance evaluation of the smart energy meters in use, to explore the measurement work for on-site calibration of smart energy meters under current and power factor in the actual environment.