Analysis of distorted waveforms in power converter systems

We present a method of determining the frequency, developed and based on the Prony model. The method was derived for those cases in which the process contains two dominant harmonics and noise. Additionally, in order to improve the accuracy of the method, median filtering was applied. The presented methods can be useful for practical applications in power systems, like the control systems of frequency converters. Streszczenie. W artykule przedstawiono metode wyznaczania czestotliwości, opracowaną na podstawie modelu Prony'ego. Metod zostala opracowana z zalozeniem, ze analizowany proces zawiera dwie harmoniczne i szum. Dodatkowo, w celu poprawy dokladności metody, zastosowano filtrowanie medianowe. Zaprezentowana metoda moze byc wykorzystana w ukladach elektroenergetycznych, takich jak uklady sterujące przeksztaltnikow. (Analiza przebiegow odksztalconych w ukladach z przeksztaltnikami).

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