Construction, commissioning and use of a test bench for smart meter accuracy verification

Abstract

As a result of the ever-increasing share of renewable energies in electricity production and the associated volatile supply of renewable generation facilities, overvoltages going beyond the norm already occur today. To counter this and to be able to intervene, the relevant operational values have to be known. This paper describes the construction, commissioning and use of a test bench to verify the accuracy of smart meters deployed for the determination of operating variables. The accuracy of a specific smart meter is verified at the previously developed test bench under the utilization of various test methods, to review the functionality of the test bench. The construction of the test bench and its software allow to check all measurable factors of different smart meter models and make the individual creation and customization of measurement methods possible. The results of the exemplary measurements show that gross errors occur both in the averaging of the angle measurements as well as for the measurement-period adjustment.