POWER CONVERSION EQUIPMENT

• Main Authors: ITO TOMOMICHI, AIHARA TAKASHI, KOSEKI SHOICHIRO
• Format: Patent
• Language: English
• Published: 06.08.2009
• Subjects: 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; PHYSICS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES; 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

PROBLEM TO BE SOLVED: To more effectively perform voltage variation suppression and to prevent current voltage constant control function necessary for power conversion equipment from being damaged by making effective current also usable for voltage variation suppression control as regards the power conversion equipment used for voltage variation suppression of a system. SOLUTION: The power conversion equipment 1 is provided with a power converter, a first current detector 5 for detecting output current of the power converter, a second current detector 7 for detecting load current at an interconnection point to the system of the power converter, a voltage detector 6 for detecting voltage at the interconnection point, a current command value generation system 10 for generating current command values 16 and 17 on the basis of the current signal 7s of the second current detector and the voltage signal 6s of the voltage detector, and a current control system 23 for controlling the power converter so as to make a current feedback value obtained from a current signal 5s by the first current detector coincide with the current command values, and is further provided with a compensation system 30 for calculating a compensation value 34 on the basis of the current signal 7s and the voltage signal 6s, and compensating the current command values with the compensation value. COPYRIGHT: (C)2009,JPO&INPIT