Harmonic current injection method and related equipment

The invention provides a harmonic current injection method and related equipment. The method comprises the steps that noise information in a whole vehicle mode is acquired, and the type of harmonic current causing noise is determined based on the noise information; based on the harmonic current type, performing first calibration on the harmonic current in the whole vehicle mode to determine a first current parameter; performing second calibration on the harmonic current in the bench mode based on the first current parameter to determine a second current parameter; and determining an optimal current parameter based on the first current parameter and the second current parameter, and performing harmonic current injection based on the optimal current parameter. Therefore, the harmonic current calibration of the whole vehicle can be taken as a main part, and the rack harmonic current calibration can be taken as an auxiliary part after the approximate interval of the current amplitude and the phase is determined,