| 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 to one another in parallel.SOLUTION: Each of a plurality of power conversion devices outputs AC power based on electric power input from a plurality of power sources. Each of plural switches for outputting self-supported output passages is inserted in each of AC output passages of the plural power conversion devices. A plurality of drive signal lines are provided to transmit a drive signal from the plural power conversion devices to the plural switches, and the plural drive signal lines have coupling points. In a case where a power conversion device releases interconnection with a system and switches the switch thereof for switching to the self-supported output, the power conversion device sets itself to a master when the level of the driving signal line thereof is reversed before and after the switching, and sets itself to a slave when the level is not reversed.SELECTED DRAWING: Figure 1 |
