# US 10,120,002 B2 · Estimation program, estimation apparatus, and estimation method

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- Number: US 10,120,002 B2
- Document ID: US10120002B2
- Status: Granted
- Kind: B2
- Application number: 14/520,778
- Filed: 2014-10-22
- Published: 2015-04-23
- Granted: 2018-11-06
- Earliest claimed: 2013-10-23
- Assignees: Fujitsu Limited
- Applicants: Fujitsu Limited
- Inventors: Yuta Teranishi; Hironobu Kitajima; Hideyuki Kikuchi
- Web page: https://patentgrep.com/patent/US10120002B2

## CPC

- G01R 21/133: by using digital technique
- G06Q 10/04: Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" (market predictions or forecasting for commercial activities G06Q30/0202)
- G06Q 30/0204: Market segmentation
- G06Q 50/06: Energy or water supply
- Y04S 50/14: Marketing, i.e. market research and analysis, surveying, promotions, advertising, buyer profiling, customer management or rewards
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

A non-transitory computer readable storage medium for causing a computer monitoring a power distribution system in which a first customer and a second customer are mixed to execute a process, the process including: acquiring first data measured with a first measurement device which is installed in the first customer and measures the first data at a first time interval; acquiring second data measured with a second measurement device which is installed in the second customer and measures the second data at a second time interval longer than the first time interval; estimating data of the first time interval about an electric power of the second customer by using the acquired first data and the acquired second data; and estimating a value about a voltage or a current for each customer by using the estimated data of the first time interval and the acquired first data.

## Claims

### Claim 1

A non-transitory computer readable storage medium for causing a computer monitoring a power distribution system in which information of first customers and a second customer are mixed to execute a process, the process comprising:
acquiring first data including first power consumption values measured with a first measurement device installed in association with each of the first customers, the first measurement device measuring the first power consumption values;
acquiring second data including an integral power consumption measured with a second measurement device installed in association with the second customer, the second measurement device measuring the integral power consumption;
normalizing the acquired first data of each of the first customers;
selecting n sets of normalized first data where n is two or greater;
estimating n sets of third data each including second power consumption values every first time interval for the second customer by using selected n sets of the normalized first data and the acquired second data;
estimating n sets of fourth data each including voltage values or current values every first time interval for each of the first customers and the second customer by using the n sets of third data and the acquired first data;
obtaining a frequency distribution of a voltage value or a current value at each time for each of the first customers and the second customer by using the n sets of fourth data for each of the first customers and the second customer; and
outputting the obtained frequency distribution of the voltage value or the current value at each time for each of the first customers and the second customer to a voltage control device that controls a voltage in a power grid based on the obtained frequency distribution to maintain the voltage in the power grid in a stipulated voltage or less.

### Claim 2 (depends on 1)

The non-transitory computer readable storage medium as claimed in claim 1, wherein
when the n sets of normalized first data are selected, the estimating the n sets of third data includes selecting the n sets plurality of normalized first data from all the normalized first data corresponding to the first customer having a common characteristic with the second customer.

### Claim 3

An estimation apparatus monitoring a power distribution system in which information of first customers and a second customer are mixed, the estimation apparatus comprising:
a memory; and
a processor coupled to the memory and configured to:
acquire first data including first power consumption values measured with a first measurement device installed in association with each of the first customers, the first measurement device measuring the first power consumption values at a first time interval,
acquire second data including an integral power consumption measured with a second measurement device installed in association with the second customer, the second measurement device measuring the integral power consumption at a second time interval longer than the first time interval,
normalize the acquired first data of each of the first customers,
select n sets of normalized first data where n is two or greater, and
estimate n sets of third data each including second power consumption values every first time interval for the second customer by using selected n sets of normalized first data and the acquired second data,
estimate n sets of fourth data each including voltage values or current values every first time interval for each of the first customers and the second customer by using the n sets of third data and the acquired first data;
obtain frequency distribution of a voltage value or a current value at each time for each of the first customers and the second customer by using the n sets of fourth data for each of the first customers and the second customer, and
output the obtained frequency distribution of the voltage value or the current value at each time for each of the first customers and the second customer to a voltage control device that controls a voltage in a power grid based on the obtained frequency distribution to maintain the voltage in the power grid in a stipulated voltage or less.

### Claim 4 (depends on 3)

The estimation apparatus as claimed in claim 3, wherein
when the n sets of normalized first data are selected, the processor is configured to select the n sets of normalized first data from all the normalized first data corresponding to the first customer having a common characteristic with the second customer.

### Claim 5

An estimation method for causing a computer monitoring a power distribution system in which information of first customers and a second customer are mixed to execute a process, the process comprising:
acquiring first data including first power consumption values measured with a first measurement device installed in association with each of the first customers, the first measurement device measuring the first power consumption values at a first time interval;
acquiring second data including an integral power consumption measured with a second measurement device installed in association with the second customer, the second measurement device measuring the integral power consumption at a second time interval longer than the first time interval;
normalizing the acquired first data of each of the first customers;
selecting n sets of normalized first data where n is two or greater;
estimating n sets of third data each including second power consumption values every first time interval for the second customer by using selected n sets of normalized first data and the acquired second data,
estimating n sets of fourth data each including voltage values or current values every first time interval for each of the first customers and the second customer by using the n sets of third data and the acquired first data;
obtaining frequency distribution of a voltage value or a current value at each time for each of the first customers and the second customer by using the n sets of fourth data for each of the first customers and the second customer; and
outputting the obtained frequency estimated probability distribution of the voltage value or the current value at each time for each of the first customers and the second customer to a voltage control device that controls a voltage in a power grid based on the obtained frequency distribution to maintain the voltage in the power grid in a stipulated voltage or less.

### Claim 6 (depends on 5)

The estimation method as claimed in claim 5, wherein
when the n sets of normalized first data are selected, the estimating the n sets of third data includes selecting the n sets of normalized first data from all the normalized first data corresponding to the first customer having a common characteristic with the second customer.