Testing Electric Utility Smart Meters with High Harmonic Current Waveforms

摘要

This paper describes the results from testing the accuracy of electric utility smart meters. The results compare the smart meter measurements of voltage and current waveforms of a fundamental 60 Hz frequency with energy usage that contains current signals with narrow spikes. The Fourier component analysis of the current spikes requires high harmonic frequency analysis. A separate, precision power analyzer was calibrated as the reference. The worst-case error of about 3% was measured for three similar model meters out of twelve meters, where the uncertainty was about 0.1%.