POWER CONTROL SYSTEM, POWER CONTROL DEVICE, AND METHOD FOR CONTROLLING POWER CONTROL SYSTEM

In order to construct a system that can manage efficient operation control among a plurality of distributed power sources without impairing versatility of the distributed power source side, the disclosed power control system includes a power generation device 33 that generates power while a current sensor 40 detects forward power flow, a power control device 20 that has an output portion 26 capable of outputting power from the other distributed power sources 12 while the power generation device 33 and the other distributed power sources 12 are disconnected from a grid and a dummy output system 50 capable of supplying, by output from at least one of the output portion 26 and the power generation device 33, dummy current that can be detected as current in the same direction as forward power flow by the current sensor 40. The power control system further includes an independent operation switch 24 that is disposed between the power generation device 33 and the other distributed power sources 12, and is turned off during interconnected operation and is turned on during independent operation by the distributed power sources, and a synchronous switch 52 that flows dummy current synchronously with the independent operation switch 24 when the independent operation switch 24 is on.