Szukana fraza: [Abstrakt = "This article discusses and compares algorithms for the phase shift measurement between the two signals and used in the electric power protection systems. The selected algorithms were theoretically analysed\: two using Fourier and Hilbert transformation, based on zero crossing detection and demodulation of the phase angle. The details of implementation in Scilab scientific environment were shown and their behavior under various operating parameters compared. The test signals were specified and later used in algorithms evaluation. Part two of the article presents the implementation of selected measurement algorithms."]

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