RT info:eu-repo/semantics/article
T1 A study of the effects of time aggregation and overlapping within the framework of IEC standards for the measurement of harmonics and interharmonics
A1 Arranz Gimón, Ángel Eugenio
A1 Zorita Lamadrid, Ángel Luis
A1 Moríñigo Sotelo, Daniel
A1 Duque Pérez, Óscar
K1 Harmonics
K1 Armónicos
K1 Interharmonics
K1 Interarmónicos
AB The increasing incorporation of power electronics and other non-linear loads, in addition to their energy advantages, also implies a poor power quality, especially as regards harmonic pollution. Different solutions have been proposed to measure harmonic content, taking the International Electrotechnical Commission (IEC) standards as a reference. However, there are still some issues related to the measurement of the harmonic, and especially, interharmonic content. Some of those questions are addressed in this work, such as the problem derived from the instability of the values obtained by applying the discrete Fourier transform to each sampling window, or the appearance of local peaks when there are tones separated by multiples of the resolution. Solutions were proposed based on time aggregation and the overlapping of windows. The results demonstrate that aggregation time, window type, and overlapping can improve the accuracy in harmonic measurement using Fourier transform-based methods, as defined in the standards. The paper shows the need to consider spectral and time groupings together, improving results by using an appropriate percentage of overlap and an adaptation of the aggregation time to the harmonic content.
PB MDPI
SN 2076-3417
YR 2019
FD 2019
LK https://uvadoc.uva.es/handle/10324/53287
UL https://uvadoc.uva.es/handle/10324/53287
LA eng
NO Applied Sciences, 2019, vol. 9, n. 21, 4549
NO Producción Científica
DS UVaDOC
RD 24-nov-2024