METHOD FOR CONTROLLING POWER FACTOR OF THREE-PHASE CONVERTER, METHOD FOR CONTROLLING REACTIVE POWER OF THREE-PHASE CONVERTER, AND CONTROLLER OF THREE-PHASE CONVERTER

METHOD FOR CONTROLLING POWER FACTOR OF THREE-PHASE CONVERTER, METHOD FOR CONTROLLING REACTIVE POWER OF THREE-PHASE CONVERTER, AND CONTROLLER OF THREE-PHASE CONVERTER5 AbstractIn a three-phase converter, a power factor is controlled to be an arbitrary set value for controlling reactive power. In powe...

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Hauptverfasser:	YOSHIHISA HATA, ATSUSHI TAKAYANAGI, ITSUO YUZURIHARA, TSUYOSHI OKANO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER 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 TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Zusammenfassung:	METHOD FOR CONTROLLING POWER FACTOR OF THREE-PHASE CONVERTER, METHOD FOR CONTROLLING REACTIVE POWER OF THREE-PHASE CONVERTER, AND CONTROLLER OF THREE-PHASE CONVERTER5 AbstractIn a three-phase converter, a power factor is controlled to be an arbitrary set value for controlling reactive power. In power conversion according to the three-phase converter which subjects three-phase AC to PWM conversion for outputting DC,10 symmetrical component voltage values of a balanced system are calculated from wye-phase voltages on the three-phase AC input side of the three-phase converter. On the DC output side of the three-phase converter, the power factor is set, an average active power value is calculated from an output voltage value15 and an output current value, and an average reactive power is calculated from the set power factor. On the basis of the symmetrical component voltage values, the average active power, and the active reactive power, a compensation signal for compensating for unbalanced voltages of the three-phase AC20 voltages and a control signal for controlling the power factor are generated, and according to the compensation signal and thecontrol signal, a PWM control signal for subjecting the three-phase AC to the PWM conversion for outputting DC is generated.25Figure 1