Power calculation apparatus and power calculation method

A power calculation apparatus calculating an amount of power suppliable and demandable between a battery and a power grid, the power calculation apparatus comprising

• a microprocessor and a memory connected to the microprocessor, wherein the microprocessor is configured to function as:
• a statistical-data acquisition unit configured to acquire statistical data regarding an amount of power suppliable to the power grid in past;
• a power prediction unit configured to predict the amount of power suppliable and demandable between the battery and the power grid at a predetermined point in time to calculate a prediction value of the amount of power suppliable and demandable;
• and
• a logic switching unit configured to switch calculation logic to be applied to a calculation of the prediction value by the power prediction unit, based on a length of duration from a present point in time to the predetermined point in time, wherein
• the power prediction unit predicts, based on state information data indicating at least any of a connection state of the battery, an internal state of the battery, and an external environment state affecting the internal state of the battery, and the statistical data, the amount of power suppliable to the power grid at the predetermined point in time,
• the calculation logic includes first calculation logic in which the state information data of the battery is used, second calculation logic in which both the state information data and the statistical data are used, and third calculation logic in which the statistical data is used, and
• the logic switching unit is configured to apply the first calculation logic to the calculation of the prediction value when the predetermined point in time is included in a first period from the present point in time to a first point in time, apply the second calculation logic to the calculation of the prediction value when the predetermined point in time is included in a second period from the first point in time to a second point later than the first point in time, apply the third calculation logic to the calculation of the prediction value when the predetermined point in time is included in a third period later than the second point in time, and when applying the second calculation logic to the calculation of the prediction value, increase a weight of the statistical data to the state information data for use in the calculation of the prediction value as the duration from the present point in time to the predetermined point in time is longer.

A power calculation method calculating an amount of power suppliable and demandable between a battery and a power grid, the power calculation method comprising:

• acquiring statistical data regarding an amount of power suppliable to the power grid in past;
• predicting the amount of power suppliable and demandable between the battery and the power grid at a predetermined point in time to calculate a prediction value of the amount of power suppliable and demandable;
• and
• switching calculation logic to be applied to a calculation of the prediction value, based on a length of duration from a present point in time to the predetermined point in time, wherein
• the predicting includes predicting, based on state information data indicating at least any of a connection state of the battery, an internal state of the battery, and an external environment state affecting the internal state of the battery, and the statistical data, the amount of power suppliable to the power grid at the predetermined point in time,
• the calculation logic includes first calculation logic in which the state information data of the battery is used, second calculation logic in which both the state information data and the statistical data are used, and third calculation logic in which the statistical data is used, and
• the switching includes applying the first calculation logic to the calculation of the prediction value when the predetermined point in time is included in a first period from the present point in time to a first point in time, applying the second calculation logic to the calculation of the prediction value when the predetermined point in time is included in a second period from the first point in time to a second point later than the first point in time, applying the third calculation logic to the calculation of the prediction value when the predetermined point in time is included in a third period later than the second point in time, and when applying the second calculation logic to the calculation of the prediction value, increasing a weight of the statistical data to the state information data for use in the calculation of the prediction value as the duration from the present point in time to the predetermined point in time is longer.