2026-04-14T18:29:13Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/532872022-05-10T20:46:52Zcom_10324_1169com_10324_931com_10324_894col_10324_1363

Arranz Gimón, Ángel Eugenio Zorita Lamadrid, Ángel Luis Moríñigo Sotelo, Daniel Duque Pérez, Óscar 2022-05-10T08:54:31Z 2022-05-10T08:54:31Z 2019 Applied Sciences, 2019, vol. 9, n. 21, 4549 2076-3417 https://uvadoc.uva.es/handle/10324/53287 10.3390/app9214549 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. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ © 2019 The Authors Atribución 4.0 Internacional A study of the effects of time aggregation and overlapping within the framework of IEC standards for the measurement of harmonics and interharmonics info:eu-repo/semantics/article