Power source apparatus, distributed power source system, and control method thereof

A power source system comprising:

• at least one power source apparatus;
• and
• a detector configured to detect forward power flow from a power grid and reverse power flow to the power grid;
• wherein
• the at least one power source apparatus comprise:
• a power sources configured to output electric power;
• and
• a controller configured to:
• acquire an formula for evaluating the power source, the formula including an operation history of the power source apparatus,
• set an output condition of the power source apparatus on the basis of the formula and a response characteristic for load following;
• and
• cause the power source to supply electric power to the load by controlling the load following function on the basis of the output condition depending on forward power flow or reverse power flow being detected by the detector.

A power providing apparatus for controlling an output thereof, the power source apparatus comprising:

• a power source configured to output electric power to an external load;
• and
• a controller electrically coupled to the power source, and configured to:
• obtain a current output condition of the power source;
• obtain information regarding power flow to or from a power grid;
• transfer an operation history of the power source into an arithmetic formula to evaluate the power source;
• estimate an effective output condition of the power source by using the arithmetic formula based on the power flow;
• and
• change the current condition to the effective output condition.