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The authors introduce two digital signal processing algorithms for frequency deviation measurement in power systems. The algorithms are derived using a novel signal processing scheme based on quadratic forms of signal samples. These algorithms provide high measurement accuracy over a wide range of frequency changes. One is designed for measurements of small deviations of the nominal frequency, whereas the other measures off-nominal frequency deviations. Performance of the algorithms is evaluated using computer simulation tests.>
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Kezunović et al. (1992) studied this question.
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