A robust measurement method for supraharmonics under power frequency deviations

Lodetti, S. ; Khokhlov, V. ; Meyer, J. ; Bruna, Jorge ; Melero, Julio J. (Universidad de Zaragoza)

Resumen: This paper introduces a new measurement method for supraharmonic distortion with improved robustness against power frequency deviations. The proposed method is based on wavelet analysis and it is designed to analyze a 10 cycles measurement interval. Fourier-based methods, instead, must analyze a fixed 200 ms window in order to avoid apparent shifts of the supraharmonic frequency components. The results of the experimental measurements presented in the paper show that the Fourier-based method suggested in IEC 61000-4-7 standard produces results affected by the value of the power frequency. The proposed method, instead, provides results completely independent of the power frequency. This feature also removes the need of a previous high pass filtering stage, required for the IEC method. Moreover, the proposed method has the additional advantage of working on the same measurement interval as traditional harmonics (below 2 kHz), feature that can reduce the complexity of measurement instruments.

Idioma: Inglés

DOI: 10.1109/AMPS.2019.8897762

Año: 2019

Publicado en: IEEE International Workshop on Applied Measurements for Power Systems proceedings (2019), 19154205 [6 pp.]
ISSN: 2473-1315

Financiación: info:eu-repo/grantAgreement/EC/H2020/676042/EU/Metrology Excellence Academic Network for Smart Grids/MEAN4SG

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Ingeniería Eléctrica (Dpto. Ingeniería Eléctrica)