RT Journal Article
T1 Performance of three algorithms for frequency measurement under transient conditions
A1 Sorrentino, Elmer
A1 Carvalho, Raul
AB This article compares the transient performance of three algorithms for electric frequency measurement. The algorithms are based on different techniques: (a) measurement of intervals between zero-crossings; (b) adjustment of points to a sinusoidal waveform; and (c) measurement of phase shift between fundamental components of Discrete Fourier Transform. The comparison was performed by application of the three algorithms to signals obtained by numerical simulation and to voltage waveforms sampled in experimental cases. For the case of numerically simulated signals, a theoretical frequency was defined as a reference value for the comparison with the measured values. In the experimental sampled waveforms, the effect of abrupt signal changes and the effect of filters are shown. The characteristics of the filters were selected to obtain a similar time delay in the measurement of a step in the frequency. With such filters, the three algorithms showed a similar transient behavior in all the analyzed cases. The analysis of the effect of harmonic distortion in the voltage signal is out of the scope of this article.
PB Elsevier
SN 0378-7796
YR 2010
FD 2010-05-26
LK https://hdl.handle.net/10016/39717
UL https://hdl.handle.net/10016/39717
LA eng
DS e-Archivo
RD 18 jul. 2024