Czasopismo | PRZEGLĄD ELEKTROTECHNICZNY | Rocznik 2018 - zeszyt 5

Assessment of Power Frequency Estimation Methods in Distributed Generation in Islanding Condition

10.15199/48.2018.05.01

nr katalogowy: 113545
10.15199/48.2018.05.01

Streszczenie

In this paper, a method for evaluation of power frequency estimation during transient operation in distributed generation (DG) in islanding conditions is presented. For this end, five methods of fundamental frequency estimation are evaluated in a distribution system with distributed generation in islanding operation, such as: (a) zero crossing, (b) adjustment of points to a pure sinusoidal waveform, (c) hybrid method, (d) discrete Fourier transform method based, and (e) Prony-Fourier-based algorithm. The estimators are compared and evaluated in two different ways, using two analytical functions, and in an electric power distributed system with DG in islanding condition. The evaluation methodology for the frequency estimators are based in statistical errors, taking into account mean, mean square error. The zero-crossing and discrete Fourier transform based estimator presented better results in comparison with the other evaluated algorithms. However, the discrete Fourier transform presented good results in the estimated frequency in the three evaluated cases.

Abstract

Streszczenie. W artykule oceniono metody badania częstotliwości w stanach przejściowych rozproszonych sieci energetycznych w warunkach tworzenia się wysp. Zbadano pięć metod: zero crossing, APPSW, hybrydową, DFT iProny. Najlepszy wyniki osiągnięto przy stosowaniu metody zero-crossing (Przeciecia osi zero) I DFT. Ocena metod określania częstotliwości w stanach przejściowych rozproszonych sieci energetycznych w warunkach tworzenia się wysp.

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Keywords

Bibliografia

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