The properties and applications of an adaptive multisection filter designed for real time operation in conditions typical for relay protection are considered. These conditions are the uncertainty of the spectral composition of the observed periodic or transient process and unknown frequency, especially in systems with a wide range and high rate of frequency change. The tuning of an adaptive filter is maximally simplified: the input is suppressed assuming that its model is the sum of its harmonic and exponential components. All sections are tuned in turn, according to the least-squares criterion. Examples of iterative determination of the frequencies of a three-frequency input, a transient variable with an exponential component, and an asynchronous process with an unknown carrier and envelope are given.
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Translated from Élektricheskie Stantsii, No. 4, April 2023, pp. 40 – 47. DOI: 10.34831_EP.2023.1101.4.007
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Kochetov, A.D., Kochetov, I.D. & Lyamets, Y.Y. Iterative Processing of Relay Protection Inputs Under Uncertainty of Spectral Composition and Base Frequency. Power Technol Eng 57, 474–480 (2023). https://doi.org/10.1007/s10749-023-01686-7
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DOI: https://doi.org/10.1007/s10749-023-01686-7