Active harmonic suppression device

• Main Author: PEI YONG
• Format: Patent
• Language: English
• Published: 03.06.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model discloses an active harmonic suppression device, and the device comprises an instruction current operation circuit which is used for detecting a harmonic wave and a reactive current component in a compensation load current, and a compensation current generation circuit which generates an actual compensation current according to an instruction signal of a compensation current of the instruction current operation circuit. The compensation current generation circuit comprises a main circuit, a drive circuit, and a current tracking control circuit. The beneficial effects of the utility model are that the device achieves dynamic compensation, can achieve the compensation of the harmonic wave with changing power and amplitude and the reactive current component, and responds to the change of a compensation object very quickly; the device can achieve the compensation of the harmonic wave and the reactive current component; the amplitude of power consumption can be adjusted continuously; the impact on the device from the impedance of a power grid is small; resonance is not liable to happen between the device and the power grid; the device can track the change of the frequency of a power grid, so the compensation performance cannot be affected by the change of the power of the power grid.