| 摘要 |
PROBLEM TO BE SOLVED: To enable determination of a master machine under autonomous operation in a power supply system in which plural power conversion devices are connected in parallel.SOLUTION: A plurality of power conversion devices respectively output AC power based on power input from plural power sources. A plurality of line switches S1a to S1c are inserted between a first node N1 to which a system is connected, and each of AC output passages L1a to L1c of the plural power conversion devices. A plurality of self-supported output switches S2a to S2c are inserted between a second node N2 connected to the self-supported output passages independent from the system and each of the AC output passages L1a to L1c of the plural power conversion devices in parallel to the plural system switches S1a to S1c. The plurality of power conversion devices set, as a master, a power conversion device which is first electrically conducted with the second node N2 when the power conversion devices release interconnection with the system and switch to the self-supported output.SELECTED DRAWING: Figure 1 |
