Abstract: A utility interconnection inverter device (7) includes an inverter circuit (21) that converts DC power generated by a solar panel (3) to AC power by switching a plurality of switching elements, and a controller (39) that controls the plurality of switching elements. Moreover, fans (43, 45) are provided for cooling the plurality of switching elements. Furthermore, a power supply circuit (a terminal 38, a transformer 40, and a power circuit 41) is provided, and supplies power from a control power supply (10) to the controller (39) and the fans (43, 45).

Abstract: This converter for electrical power recovery (1) for supplying power to a load (6) includes an in-house power generation device (5) for supplying power in cooperation with input terminal power at a power input terminal (2). Moreover, it includes a thermal storage unit (12) which, when surplus power is generated in a state in which a target value for input terminal power is set to zero, thermally stores this power. Furthermore, a control unit (9) is included which, when surplus power is generated, decides whether or not breakage of a wire of a CT (7) has occurred by raising the target value for the input terminal power from zero to a predetermined value, and by deciding whether or not the power input terminal current is somewhat elevated from zero.

Abstract: A utility interconnection inverter device (7) includes an inverter circuit (21) that converts DC power generated by a solar panel (3) to AC power by switching a plurality of switching elements, and a controller (39) that controls the plurality of switching elements. Moreover, fans (43, 45) are provided for cooling the plurality of switching elements. Furthermore, a power supply circuit (a terminal 38, a transformer 40, and a power circuit 41) is provided, and supplies power from a control power supply (10) to the controller (39) and the fans (43, 45).

Abstract: This converter for electrical power recovery (1) for supplying power to a load (6) includes an in-house power generation device (5) for supplying power in cooperation with input terminal power at a power input terminal (2). Moreover, it includes a thermal storage unit (12) which, when surplus power is generated in a state in which a target value for input terminal power is set to zero, thermally stores this power. Furthermore, a control unit (9) is included which, when surplus power is generated, decides whether or not breakage of a wire of a CT (7) has occurred by raising the target value for the input terminal power from zero to a predetermined value, and by deciding whether or not the power input terminal current is somewhat elevated from zero.