FIELD: electrical engineering.
SUBSTANCE: proposed method comprises measuring actual contribution into distortion of power quality at common connection point via measuring voltage harmonic composition at the said point, current harmonic composition and phase shift angles between voltages and currents in each harmonic. Voltage of every harmonic in the said common connection point is decomposed into direct, incident onto electric circuit load input, and backward, reflected from aforesaid input, waves with due allowance for initial parametres of the load connection line. Quantitative estimation of contribution of the k-th load into distortion voltage is determined from actual voltage of backward. Voltage of every harmonic at the said common connection point is decomposed into components of direct and backward waves in T-conversion channel, while backward wave voltage is defined by inverse transformation of backward waves in channels. Distortion voltage at aforesaid point is determined in real-time by values of the voltage harmonic composition at every time moment and averaged for required time interval.
EFFECT: higher validity, simpler determination.
3 cl
