Real-time power factor correction circuit with fractional-order capacitor and control method thereof

• Main Authors: QIU DONGYUAN, ZHANG BO, CHEN YANFENG, LU YUEHAI
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2017
• 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 invention discloses a real-time power factor correction circuit with a fractional-order capacitor and a control method thereof. The real-time power factor correction circuit is composed of an input alternating-current power supply, a fractional-order capacitor with a controllable order and capacitance value, a load, a voltage sampler, a current sampler, and a controller. The voltage sampler carries out input voltage sampling; the current sampler carries out load current sampling; the controller outputs signals for controlling the order number and capacitance value of the fractional-order capacitor based on voltage and current signals collected by the voltage sampler and the current sampler respectively, thereby adjusting the order number and capacitance value of the fractional-order capacitor and enabling the power factor of an input power side to reach 1. Therefore, real-time correction of a unit power factor can be realized effectively. According to the invention, the order number and capacitance value