Storage battery control system and storage battery control method

A storage battery control system for controlling an operation of a storage battery coupled to a power grid, comprising:

• multiple storage batteries disposed in a power grid;
• and
• a storage battery control apparatus configured to control a charging and a discharging of the multiple storage batteries, and communicably coupled to the multiple storage batteries and an energy management system,
• wherein the storage battery control apparatus is configured to:
• acquire storage battery information comprising a charging-discharging performance and a remaining capacity from the storage batteries;
• acquire power supply-demand prediction information showing a prediction of power supply and demand in a prescribed range from the energy management system, which manages the power supply and demand in the prescribed range;
• determine, based on the power supply-demand prediction information received from the energy management system, whether a mode is a balanced mode in which a power demand and a power supply are in balance, a discharging performance priority mode in which the power demand is greater than the power supply, or a charging performance priority mode in which the power supply is greater than the power demand;
• select, as a control pattern, in a case of the balanced mode, a balanced control pattern for deciding on the individual charging-discharging rate so as to allow the remaining capacity of each of the storage batteries to approach half of the full charge capacity of the relevant storage battery;
• select, as the control pattern, in a case of the discharging performance priority mode, a discharging control pattern for deciding on the individual charging-discharging rate that allows charging from a low-discharging-performance storage battery of the storage batteries to a high-discharging-performance storage battery of the storage batteries;
• and
• select, as the control pattern, in a case of the charging performance priority mode, a charging control pattern for deciding on the individual charging-discharging rate that allows charging from a high-charging-performance storage battery of the storage batteries to a low-charging-performance storage battery of the storage batteries
• decide an individual charging-discharging rate for each of the storage batteries based on the control pattern;
• and
• send the individual charging-discharging rate to each of the storage batteries, and
• each of the storage batteries is configured to operate based on the individual charging-discharging rate received from the storage battery control apparatus.