CONTROL CIRCUIT, POWER CONDITIONER PROVIDED WITH THE CONTROL CIRCUIT, AND SOLAR GENERATION SYSTEM

This invention enables a power conditioner of a photovoltaic system to operate at higher accuracy. A chopper circuit (5), a capacitor (18) connected in parallel to the chopper circuit, and a control circuit (9) for controlling ON/OFF of switch elements (10, 11) in the chopper circuit to control char...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MIYAMOTO MIO, NAKAMURA KOTARO, MABUCHI MASAO, MAKI NAOKI, TSUNAGA AKIYUKI
Format:	Patent
Sprache:	eng ; kor
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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONTROLLING CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PHYSICS REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	This invention enables a power conditioner of a photovoltaic system to operate at higher accuracy. A chopper circuit (5), a capacitor (18) connected in parallel to the chopper circuit, and a control circuit (9) for controlling ON/OFF of switch elements (10, 11) in the chopper circuit to control charging and discharging of the capacitor are arranged, where the control circuit (9) includes a measurement control section (9a) for measuring an inter-end voltage of the capacitor (18) and a control circuit section (9b) for performing a predetermined control operation from a measurement output of the measurement circuit section (9a); the measurement circuit section (9a) including a differential amplifier circuit (9a2) for differentially amplifying the inter-end voltage of the capacitor (18), and the circuit control section (9b) calibrating an in-phase component in the output of the differential amplifier circuit (9a2) as an in-phase error and performing the control from the calibrated output from the differential amplifier circuit (9a2).