CONTROL DEVICE OF POWER CONVERTER, AND SYSTEM INTERCONNECTION INVERTER SYSTEM USING THE CONTROL DEVICE

• Main Author: KUBO HIROMASA
• Format: Patent
• Language: English
• Published: 26.01.2012
• 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; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a control device capable of preventing interference in control among power converters at the time when switching is made between individual control state and collective control state.SOLUTION: When control is switched to an individual control state, generation of PWM signals P2 and P3 is started with voltage values V2 and V3 as target control voltage. A connection device is switched to an independent state when the voltages values V2 and V3 agree with a target voltage value V1, causing switching parts 94 and 95 to switch the target control value to V1. Then, it is switched to target voltage values V2and V3. When switching to a collective control state, the target control voltage is switched to V1and then the connection device is switched into a parallel state when V2 and V3 agree with V1. After that, the target control voltage is switched to V2 and V3, and then generation of the PWM signals P2 and P3 is stopped. Since all power converters perform the same control or only one power converter performs control, no interference in control occurs.