FIELD: power distribution.
SUBSTANCE: invention relates to the field of electric power engineering, in particular to methods for determining the influence of nonlinear electric power consumers on the non-sinusoidal voltage at the point of common connection (PCC). The amplitudes and phases of the currents of the higher harmonics of consumers connected to the general connection node, and the amplitudes and phases of the currents of the higher harmonics of the power supply system are measured. Based on the measured data for each harmonic separately for all consumers, the consumer's contribution to the distortion of voltage and current at the point of common connection is calculated as the ratio of the projection of the current vector of the consumer's higher harmonic on the current vector of the higher harmonic of the power supply system to the current of the higher harmonic of the power supply system according to the corresponding formula.
EFFECT: assessment of the contribution of each electricity consumer to voltage distortions in the PCC as a percentage ratio.
1 cl, 2 dwg
