System, method, and computer readable storage medium

A control method for a power grid, the control method comprising:

• in a first state in which power is not supplied from another power grid to the power grid,
• stopping a supply of generated power, from a power generation apparatus which is connected to the power grid, to the power grid, when a first condition is satisfied;
• storing a resumption time, from when the supply of the generated power from the power generation apparatus is stopped, to when the supply of the generated power from the power generation apparatus is resumed;
• and
• performing a transition control to transition from the first state to a second state in which the power is able to be supplied from the another power grid to the power grid, based on the resumption time, when a second condition is satisfied.

A non-transitory computer-readable storage medium having stored thereon a program that, when executed by a computer, causes the computer to function as:

• a stop unit which stops a supply of generated power, from a power generation apparatus which is connected to the power grid, to the power grid;
• and
• a transition control unit which in a first state in which power is not supplied from another power grid to the power grid,
• causes the stop unit to stop the supply of the generated power from the power generation apparatus to the power grid, when a first condition is satisfied,
• stores a resumption time, from when the supply of the generated power from the power generation apparatus is stopped by the stop unit, to when the supply of the generated power from the power generation apparatus is resumed, and
• performs a transition control to transition from the first state to a second state in which the power is able to be supplied from the another power grid to the power grid, based on the resumption time, when a second condition is satisfied.