RT info:eu-repo/semantics/article T1 Analysis of the use of the Hanning Window for the measurement of interharmonic distortion caused by close tones in IEC standard framework A1 Arranz Gimón, Ángel Eugenio A1 Zorita Lamadrid, Ángel Luis A1 Moríñigo Sotelo, Daniel A1 Duque Pérez, Óscar K1 Electric power K1 Energía eléctrica K1 Hann function K1 Función Hann K1 Adjustable speed drive K1 Variadores de velocidad K1 Induction motors K1 Motores de inducción K1 3306 Ingeniería y Tecnología Eléctricas AB The widespread use of devices based on power electronics and other nonlinear loads has led to an increase in harmonic distortion that affects the quality of power systems. Therefore, the correct measurement of harmonic and interharmonic content is necessary. The International Electrotechnical Commission (IEC) standards define the concepts of spectral and time grouping required for such measurements. This paper demonstrates that the procedures defined in the IEC standards are not sufficiently accurate when several close interharmonic tones interact due to the lack of stability of the values that the Discrete Fourier Transform obtains in each sampling window, and to the inaccuracy in the measurement of interharmonic groups and rates when using the Hanning window. This paper proposes novel solutions based on time aggregation and the use of other groupings and alternative windows. The results obtained are compared with the results produced by applying the rectangular window indicated in the standards, using sensitivity analysis varying one of the tones and using experimental results measuring the output signals of frequency inverters driving induction motors. The proposed method achieves greater accuracy and stability in the measurement of spectral groupings and their related distortion rates in signals with abundant and dispersed interharmonic content. PB Elsevier SN 0378-7796 YR 2022 FD 2022 LK https://uvadoc.uva.es/handle/10324/52105 UL https://uvadoc.uva.es/handle/10324/52105 LA eng NO Electric Power Systems Research, 2022, vol. 206, 107833 NO Producción Científica DS UVaDOC RD 22-dic-2024