CONTROL CIRCUIT OPERABLE TO CONTROL INVERTER CIRCUIT, INVERTER DEVICE INCLUDING THE SAME, ELECTRIC POWER SYSTEM HAVING INVERTER DEVICE, AND CONTROL METHOD

摘要

To provide an internal phase synchronization method in an electric power system with distributed power sources connected in parallel, which can solve a problem arising in the case of synchronizing internal phases according to a centralized monitoring method or master-slave method.SOLUTION: A control circuit 3 operable to control an inverter circuit 2 of a distributed power source A comprises: an internal phase-generating part 31 for generating an internal phase θto be used for control; and a communication part 34 for communicating with at least one other distributed power source A. The communication part 34 sends the internal phase θgenerated by the internal phase-generating part 31 to the other distributed power source A. The internal phase-generating part 31 uses the generated internal phase θ, and an arithmetic operation result ubased on an internal phase θof the other distributed power source A received by the communication part 34 to generate an internal phase θ. Each distributed power source A performs the process, whereby the internal phases θof the distributed power sources A converge one value.SELECTED DRAWING: Figure 1