FIELD: electricity.
SUBSTANCE: according to the method evenly shifted downconverted in time signals with a fixed interval of downconversion are composed out of measurements of the electrical quantity so that overlaying of all the downconverted signals to the same time axis gives measurements of the electrical quantity. Then each downconverted signal is converted into orthogonal components of the evaluated harmonic by means of a double-channel orthogonal filter. The orthogonal values of the evaluated harmonic are obtained by overlaying samples of the same orthogonal components of the downconverted signals to the time axis of the orthogonal component of the evaluated harmonic.
EFFECT: improving accuracy for determining orthogonal harmonic components of a periodical signal at the electric quantity processing with high sampling rate.
6 dwg
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