Testing Electric Utility Smart Meters with High Harmonic Current Waveforms

Steiner, Reto; Farrell, Michael; Edwards, Shannon; Nelson, Thomas L.; Codere, Julia; Sarwat, Sumaya

doi:10.1109/cpem49742.2020.9191866

Cited by 2 publications

(2 citation statements)

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“…These findings were confirmed by an independent research lab in [33]. Similar research in [34] tried to replicate the measurements for specimen of meters as used in North America, however this research could not find any errors outside the permissible limits of those tested meters. This means that only a selection of static energy meters will show interference problems, which was also stated in the other studies.…”

Section: Source Victimsupporting

confidence: 58%

Electromagnetic interference on static energy meters due to residential emissions

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Section: Source Victimsupporting

confidence: 58%

Electromagnetic interference on static energy meters due to residential emissions

Have

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“…Type tests for static electricity meters currently specified in international standards are based on single swept sinusoidal tones but, while they reproduce some of the possible deviations from ideal sinusoidal waveforms, there is a lack of type tests that reflect realistic non-sinusoidal conditions that are occurring in low voltage networks due to increasingly non-linear loads. Work is in progress to develop the foundations for an extended standardisation framework [12], [13], including nonsinusoidal test waveforms containing high levels of distortion associated with errors in static electricity meters [14]. A simple and compact description for these new test waveforms is needed, which can be easily formulated in a standard for reproduction by test laboratories.…”

Section: Introductionmentioning

confidence: 99%

Wavelet-Based Sparse Representation of Waveforms for Type-Testing of Static Electricity Meters

Lodetti

Ritzmann

Davis

et al. 2022

IEEE Trans. Instrum. Meas.

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This paper presents a strategy for the description of new test waveforms for static electricity meters to be included in international standards. The need of extending the existing standardisation frame arises from several recent studies that have reported conducted electromagnetic interference problems of type-approved static electricity meters, resulting in significant errors in the measured electricity consumption. The proposed method is based on discrete wavelet transform and allows for a compact and parsimonious representation of test waveforms, suitable for inclusion in standards. Very few wavelet parameters are concentrating the relevant information to accurately reproduce all the characteristics that the meters need to be tested against. The same parsimonious description cannot be performed with the current practises based on Fourier transform methods since the new test signals need to be highly non-sinusoidal. The discrete wavelet transform is proposed as a more effective tool to sparsely describe the most relevant waveform features. The effect of different discrete wavelet transform decomposition settings on compactness and reconstruction accuracy is studied using suitable metrics. Finally, results from experimental validation with several different waveforms are presented to demonstrate that the error-inducing features can be preserved using only 0.1 % of the original signal information.

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Testing Electric Utility Smart Meters with High Harmonic Current Waveforms

Cited by 2 publications

References 3 publications

Electromagnetic interference on static energy meters due to residential emissions

Electromagnetic interference on static energy meters due to residential emissions

Wavelet-Based Sparse Representation of Waveforms for Type-Testing of Static Electricity Meters

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