Patent ID: 8886477

Claim:
A reserve capacity calculating apparatus comprising: a reference power consumption receiver configured to receive from a demand restraint calculating apparatus a reference power consumption sequence being a power consumption sequence of a first date planned for a customer; an electric power history database configured to store therein a power consumption sequence of the customer and demand restraint strength with each date, the power consumption sequence being measured by a power measuring instrument; a temperature history database configured to store therein an outdoor temperature sequence of a customer house with each date, the outdoor temperature sequence being measured by a temperature sensor; a power consumption distribution calculator configured to (a) use a predicted outdoor temperature sequence given previously of the customer house for a prediction period at the first date from a first time to a second time being later than the first time, (b) identify, in the temperature history database, dates having a sequence part similar to the predicted outdoor temperature sequence in the prediction period, (c) identify, with identified dates, in the electric power history database, power consumption sequences having same demand restraint strength as that of the first date, and (d) calculate a statistical distribution or a representative value of identified power consumption sequences for each of a history used period from a third time to the first time and the prediction period, the third time being earlier than the first time; a power consumption predicting unit configured to correct the statistical distribution or the representative value of the prediction period based on the power consumption sequence measured for the history used period at the first date and the statistical distribution or the representative value of the history used period and predict a power consumption sequence in the prediction period based on the corrected statistical distribution or the corrected representative value of the prediction period; and a reserve capacity calculating unit configured to calculate reserve capacity being a difference between a predicted power consumption sequence and a sequence part in the prediction period of the reference power consumption sequence, and to transmit the reserve capacity to the demand restraint calculating apparatus.