PROCEDURE ESTABLISHING FREQUENCY OF LINE VOLTAGE Russian patent published in 2004 - IPC

Abstract RU 2231076 C1

FIELD: digital signal processing.

SUBSTANCE: procedure is based on multiplication of reference and analyzed signals, on summation of obtained values across investigation interval and on computation of average value of product of reference and analyzed signals on each frequency of reference signal while phase of reference signal is sorted out from 0 to 180 degrees. Frequency of line voltage is found by maximum of average value of product of signals. Reference signal is presented by binary sounding function

EFFECT: decreased computation time of frequency of line voltage.

3 dwg, 2 tbl

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RU 2 231 076 C1

Authors

Avramchuk V.S.

Gol'Dshtejn E.I.

Dates

2004-06-20—Published

2003-07-02—Filed