Challenges in the Proper Metrological Verification of Smart Energy Meters
For metrologists and utility regulators, this work highlights the inadequacy of existing verification standards for smart energy meters.
The paper identifies challenges in verifying smart energy meters under realistic grid conditions, showing that current tests under ideal conditions fail to reveal imperfections in signal chains, and proposes future research directions.
The most common instruments currently used to measure active/reactive energy and power quality indicators are smart energy meters (EM). Unfortunately, the verification of such meters is currently performed under ideal conditions or with simple signal models, which do not recreate actual states occurring in the power grid and do not ensure the verification of the properties of their signal chains. This paper presents challenges in proper metrological verification of smart EM. It presents existing legal and normative requirements and scientific research directions regarding these meters. Although the meters tested comply with the normative and legal requirements, the results reveal numerous imperfections in the signal and measurement chains for the selected test signal. Based on the results of the research results, further directions have been determined in the field of smart EM.