METHOD OF DETERMINING SINUSOIDAL COMPONENT OF SHORT-CIRCUIT CURRENT Russian patent published in 2016 - IPC H01H83/22 

FIELD: electricity.

SUBSTANCE: method comprises performing analogue-to-digital conversion of observed current, preliminary suppression of sinusoidal component using a reject filter and recording its output signal readings. Method includes additional interval processing in same filter of specially selected reference signals. Additional processing is carried out at same current time intervals, as main input signal suppression operation. Shape of reference signals is set rigidly, but with preservation of dependence on variable parameters. Values of parameters are determined from condition of equality of readings of main and additional output signals. Reference signals whose parameters are determined, act only on own time intervals. Aperiodic component is formed from interval of reference signals.

EFFECT: faster determination of sinusoidal component with possibility of monitoring accuracy of result.

4 cl, 3 tbl, 12 dwg