Starting from more precise estimation of the harmonics components of the current source to administrate the harmonics in supply network

when there exist multi-harmonic sources at the point of common coupling

the phase relationship of different harmonic sources was firstly used as to reduce the harmonic currents with lower frequencies injected into the network.Then

using multi-channel digital wave recorder

the digital discrete waveform in multi-harmonic current sources could be recorded at the same time

and with fast Fourier analysis

the magnitudes and the initial phases of the fundamental and every harmonic currents could be calculated in the distorted waveform of each harmonic current source occurred at the same time.It can be concluded that the synthetic harmonic current of the harmonic current source can be reduced by using the phase relationship within multi-harmonic sources.