Energy management system and energy management method for water supply

Patent metadata

Field	Value
Publication number	US-11636558-B2
Application number	US-202017123302-A
Country	US
Kind code	B2
Filing date	Dec 16, 2020
Priority date	Jan 29, 2020
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Cooperation in supply and demand balance of renewable energy in a region is implemented by operation of infrastructures of an infrastructure service such as water supply. In an energy management system including: a processor; and a storage device, the processor predicts an electric power supply amount utilizing renewable energy in a predetermined region, predicts an electric power demand amount in the region, predicts a demand amount of an infrastructure service different from an electric power service in the region, predicts an electric power demand amount corresponding to the infrastructure service on the basis of the predicted demand amount of the infrastructure service in the region, and determines use time of electric power corresponding to the infrastructure service such that the electric power demand amount in the region approaches the electric power supply amount.

First claim

What is claimed is:

1. An energy management system comprising:
a processor; and
a storage device,
the processor
predicting an electric power supply amount utilizing renewable energy in a predetermined region;
predicting an electric power demand amount in the region;
predicting a demand amount of a water supply service in the region;
predicting a demand amount of a hot water supply in the region;
predicting an electric power demand amount corresponding to the water supply service on a basis of the predicted demand amount of the water supply service in the region and the predicted demand amount of the hot water supply in the region;
predicting a first demand time of the hot water supply in the region;
predicting a second demand time of the water supply service in the region; and
determining a first set time or a second set time, wherein the first adjustment set time comprises determining a boiling time of the hot water supply on a basis of the predicted demand time of the hot water supply in the region and the predicted electric power demand amount corresponding to the water supply service, and wherein the second set time comprises determining a water supply equipment pump operation time on a basis of the predicted demand time of the water supply service in the region and the predicted electric power demand amount corresponding to the water supply service; and controlling the energy management system based on the first set time and the second set time.

2. The energy management system according to claim 1 , wherein
the electric power demand amount corresponding to the water supply service is an electric power demand amount for operation of a distribution pump for the water supply service;
the predicted electric power supply amount is earlier than the predicted electric power demand amount corresponding to the water supply service; and
the processor is configured to
match the electric power demand amount with the electric power supply amount by setting the second set time, at which electric power demand for water distribution occurs, to a time earlier than the predicted second demand time, at which demand of the water supply service in the region occurs, and
output information indicating that the water distribution pump is operated at the second set time to a water supply company by which the water supply service is provided.

3. The energy management system according to claim 1 , wherein
the electric power demand amount corresponding to the water supply service is an electric power demand amount for hot water boiling;
the predicted electric power supply amount is earlier than the predicted electric power demand amount corresponding to the hot water boiling; and
the processor is configured to
match the electric power demand amount in the region with the electric power supply amount by setting the first set time, at which electric power demand for the hot water boiling occurs, to a time earlier than the predicted first demand time, at which hot water supply boiling service demand in the region occurs; and

outputs information indicating that hot water boiling is performed at the determined first set time to a consumer of the electric power that performs hot water boiling.

4. The energy management system according to claim 3 , wherein
the storage device retains meteorological performance information of the region in a past, meteorological forecast information of the region in future and operation schedule information of facilities in the region, and
the processor predicts the hot water supply demand amount in the region on a basis of the meteorological performance information, the meteorological forecast information, and the operation schedule information of the facilities.

5. The energy management system according to claim 1 , wherein
the processor predicts the water supply demand amount in the region on a basis of information from water supply smart meters of consumers of the water supply service.

6. The energy management system according to claim 1 , wherein
the storage device retains performance information of electric power demand in the region in a past, meteorological performance information in the region in the past, meteorological forecast information in the region in future, and operation schedule information of facilities in the region, and
the processor predicts the electric power demand amount in the region on a basis of the performance information of the electric power demand, the meteorological performance information, the meteorological forecast information, and the operation schedule information of the facilities.

7. The energy management system according to claim 1 , wherein
the storage device retains performance information of the electric power demand in the region in a past, meteorological performance information in the region in the past, meteorological forecast information in the region in future and terrain information relating to the region,
the electric power supply amount utilizing renewable energy is at least either the electric power supply amount by solar power generation or the electric power supply amount by wind-power generation, and
the processor
predicts the electric power supply amount by solar power generation on a basis of the meteorological performance information in the region in the past and the meteorological forecast information in the region in the future, and
predicts the electric power supply amount by wind-power generation on a basis of the meteorological performance information in the region in the past, the meteorological forecast information in the region in the future and the terrain information relating to the region.

8. An energy management method executed by an energy management system that includes a processor and a storage device, the energy management method comprising:
a first procedure, by the processor, of predicting an electric power supply amount utilizing renewable energy in a predetermined region;
a second procedure, by the processer, of predicting an electric power demand amount in the region;
a third procedure, by the processor, of predicting a demand amount of a water supply service in the region;
a fourth procedure, by the processor, of predicting a demand amount of a hot water supply in the region;
a fifth procedure, by the processor, of predicting an electric power demand amount corresponding to the water supply service on a basis of the predicted demand amount of the water supply service in the region and the predicted demand amount of the hot water supply in the region;
a sixth procedure, by the processor, of predicting a first demand time of the hot water supply in the region;
a seventh procedure, by the processor, of predicting a second demand time of the water supply service in the region; and
an eighth procedure, by the processor, determining to set a first set time or a second set time, wherein the first set time comprises determining a boiling time of the hot water supply on a basis of the predicted demand time of the hot water supply in the region and the predicted electric power demand amount corresponding to the water supply service, and wherein the second set time comprises determining a water supply equipment pump operation time on a basis of the predicted demand time of the water supply service in the region and the predicted electric power demand amount corresponding to the water supply service; and a ninth procedure, by the processor, controlling the energy management system based on the first set time and the second set time.

9. The energy management method according to claim 8 , wherein
the electric power demand amount corresponding to the water supply service is an electric power demand amount for oper

Assignees

• Hitachi Ltd

Inventors

• Yoshimoto Naoki

Classifications

• H02J2105/12

  supplying households or buildings · CPC title

• H02J2105/57

  according to a pre-established time schedule · CPC title

• H02J2101/20

  Dispersed power generation using renewable energy sources · CPC title

• H02J3/003

  Load forecast, e.g. methods or systems for forecasting future load demand · CPC title

• G06Q10/063

  Operations research, analysis or management · CPC title