Supply-demand balance controller

A supply-demand balance controller for creating a power supply plan in a predetermined period, comprising:

• a collection controller configured to collect, from customers, power demand data showing power consumed by customer appliances, the customer appliances including a controllable appliance whose power consumption can be controlled from an external point;
• a first storage configured to store a history of power demand of the customers;
• a first predicting unit configured to predict power demand of the customers in the predetermined period, based on the history in the first storage;
• a second storage configured to store predictive power demand of the customers predicted by the first predicting unit;
• a first reliability value calculator configured to calculate first reliability values that are reliability values of the predictive power demand of the customers such that the first reliability value of each customer becomes larger as dispersion or standard deviation of differences between the power demand of the customers in the first storage and the predictive power demand of the customers in the second storage becomes smaller;
• a power receiving unit configured to receive power from a power system, the power system generating power with a plurality of power generating units;
• a distribution unit configured to distribute the power received at the power receiving unit to the customers;
• a power supply acquiring unit configured to acquire data concerning power supplied by each power generating unit of power received from the power system;
• a third storage configured to store a history of power supplied by each power generating unit;
• a second predicting unit configured to predict power supplied by each power generating unit in the predetermined period, based on the history stored in the third storage;
• a fourth storage configured to store data of predictive supplied power of each of the power generating units;
• a second reliability value calculator configured to calculate second reliability values that are reliability values of the predictive supplied power of the power generating units such that the second reliability value of each power generating unit becomes larger as dispersion or standard deviation of differences between the supplied power of the each power generating unit in the third storage and the predictive supplied power of the each power generating unit in the fourth storage becomes smaller;
• a reliability-level-based demand aggregator configured to classify the customers into a plurality of groups based on the first reliability values;
• a reliability-level-based supply/power generation aggregator configured to classify the power generating units into the groups based on the second reliability values;
• a balancing unit configured to calculate, for each of the groups, a difference between a first sum of the predictive power demand of the customers belonging to the group and a second sum of the predictive supplied power of the power generating units belonging to the group, and to calculate a sum of calculated differences multiplied by weights assigned to the groups to obtain a supply-demand margin level;
• and
• a plan creator configured to create a plan in the predetermined period for controlling power used by the controllable appliances of each customer based on the supply-demand margin level.