The invention discloses an active
harmonic management device. The device comprises an instruction current operational circuit and a compensating
current generation circuit. The instruction current operational circuit is used for detecting
harmonic wave and reactive power current components in compensating load currents, and the compensating
current generation circuit is used for generating actual compensating currents according to an instruction
signal of the compensating currents, wherein the instruction
signal is obtained according to the instruction current operational circuit. The compensating
current generation circuit comprises a main circuit, a
driving circuit and a current tracking and controlling circuit. The active
harmonic management device has the advantages that dynamic compensation is achieved, harmonic
waves changeable in frequency and size and changeable reactive power can be compensated, and response to changes of a compensated object is rapid; the harmonic
waves and the reactive power can be compensated at the same time, and the intensity of the compensated reactive power can be continuously adjusted; influences caused by
power grid impedance are small, and
harmonic vibration between the active harmonic management device and the
power grid impedance is not prone to occurring; changes of
power grid frequencies can be tracked, so that the compensating performance is not affected by the changes of the power grid frequencies.