Startup control method, grid interconnection apparatus, and controller

A grid interconnection apparatus configured to perform an interconnected operation in which output power of a photovoltaic cell is input to the grid interconnection apparatus and the photovoltaic cell is interconnected to a grid to supply power to a load, comprising:

• a supply unit that supplies power from independent operation output of the grid interconnection apparatus to a predetermined load by an independent operation that does not interconnect the photovoltaic cell to the grid before starting the interconnected operation at the time of starting up the grid interconnection apparatus;
• and
• an interconnected operation unit that stops the independent operation to start the interconnected operation when the output power amount of the photovoltaic cell or the grid interconnection apparatus is larger than a predetermined amount at the time of supplying power from the independent operation output to the predetermined load.

A controller that controls a grid interconnection apparatus configured to perform an interconnected operation in which output power of a photovoltaic cell is input to the grid interconnection apparatus and the photovoltaic cell is interconnected to a grid to supply power to a load, comprising:

• a supply control unit that performs control to supply power from the independent operation output of the grid interconnection apparatus to a predetermined load by the independent operation that does not interconnect the photovoltaic cell to the grid before starting the interconnected operation at the time of starting up the grid interconnection apparatus;
• and
• an operation control unit that performs control to stop the independent operation to start the interconnected operation in a case where the output power amount of the photovoltaic cell or the grid interconnection apparatus when power is supplied from the independent operation output to the predetermined load, is larger than a predetermined amount.