Inverter apparatus connected to a plurality of direct current power sources and dispersed-power-source system having inverter apparatus linked to commercial power system to operate

摘要

An inverter apparatus includes a plurality of converters each receiving a direct current power from respective plurality of solar cell arrays having different output voltage ranges, and an inverter transforming the direct current power from the plurality of converters into an alternating current power and allowing the alternating current power to reversely flow into a commercial power system. The plurality of converters have different voltage input ranges corresponding to the output voltage ranges of the plurality of solar cell arrays, and each control, based on a pulse frequency modulation control signal received from a corresponding converter control unit, an output voltage of corresponding one of the plurality of solar cell arrays, so that an output power from corresponding one of the plurality of solar cell arrays becomes maximum.