Server, charging server, power consumption calculating system, and computer program product

A charging server to which a plurality of power meters each measuring an amount of power consumption of an electric appliance is connected, comprising:

• a receiving unit configured to receive a sum of calculation results, the calculation result being calculated based on amounts of power consumption measured by a power meter and random numbers calculated according to a probability distribution by the power meter;
• an acquiring unit configured to acquire a sum of the random numbers that have been used for calculation for the amounts of power consumption;
• a calculating unit configured to calculate a sum of the amounts of power consumption measured by the power meter using the sum of the calculation results and the sum of the random numbers;
• and
• a charging unit configured to perform a charging process using the sum of the amounts of power consumption.

A power consumption calculating system comprising:

• a data management apparatus to which a plurality of power meters each measuring an amount of power consumption of an electric appliance is connected;
• and
• an energy management apparatus connected to the data management apparatus, wherein
• the data management apparatus includes:
• a first receiving unit configured to receive a calculation result, the calculation result being calculated based on the amount of power consumption measured by each of the plurality of power meters and each of random numbers generated according to a probability distribution by each of the plurality of power meters;
• a first calculating unit configured to calculate a sum or average of the calculation results;
• and
• a transmitting unit configured to transmit the sum or average of the calculation results to the energy management apparatus, and
• the energy management apparatus includes:
• a second receiving unit configured to receive the sum or average of the calculation results;
• a first storage unit configured to store therein parameters for generating random numbers;
• a second calculating unit configured to calculate an estimation value of a sum or average of the amounts of power consumption measured by the plurality of power meters using the sum or average of the calculation results and the parameters;
• and
• a determining unit configured to determine, on a basis of the estimation value, whether to perform power control.

A computer program product comprising a computer readable medium including programmed instructions, wherein the instructions, when executed by a computer to which a power meter measuring an amount of power consumption of an electric appliance is connected to, cause the computer to perform:

• receiving a sum of calculation results, the calculation result being calculated based on amounts of power consumption measured by the power meter and random numbers generated according to a probability distribution by the power meter;
• acquiring a sum of the random numbers that have been used for calculation for the amounts of power consumption;
• calculating a sum of the amounts of power consumption measured by the power meter using the sum of the calculation results and the sum of the random numbers;
• and
• performing a charging process using the sum of the amounts of power consumption.