POWER DEMAND AND SUPPLY SCHEDULING APPARATUS

• US 20130079937A1
• Filed: 09/24/2012
• Published: 03/28/2013
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Hideyuki Aisu
• Inventors: AISU, Hideyuki
• Granted Patent: US 9,143,008 B2
• Time in Patent Office: Days
• US Class Current: 700/286
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00028 involving the use of Internet protocols
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/221 General power management systems
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/242 Home appliances

Abstract

A power demand and supply scheduling apparatus a includes a transceiver that mutually exchanges power supply reservation information including at least information of a total suppliable power amount, a suppliable state start time, a suppliable state end time, and a maximum suppliable amount per unit time zone, and power request reservation information including at least information of a total request power amount, a receivable state start time, a receivable state end time, and a maximum receivable amount per unit time zone, with scheduling apparatuses for other energy management systems each of which manage other power equipment, and a plan creating unit that plans a power reception amount and a power supply amount in each of the unit time zone which are delivered to and received from the other power equipment, and creates a power delivery and reception plan.

Claims

1. A power demand and supply scheduling apparatus for an energy management system managing power equipment, which plans power supply amounts to other power equipment and power reception amounts from the other power equipment, comprising:

a transceiver configured to exchange information (A) and (B) with scheduling apparatuses provided for other energy management systems each of which manages corresponding other power equipment,

(A) power supply reservation information including at least a total suppliable power amount, a suppliable state start time, a suppliable state end time, and a maximum suppliable amount per unit time zone, out of the total suppliable power amount, the suppliable state start time, the suppliable state end time, the maximum suppliable amount per unit time zone, and upper and lower limit values of the total suppliable power amount, and

(B) power request reservation information including at least a total request power amount, a receivable state start time, a receivable state end time, and a maximum receivable amount per unit time zone, out of the total request power amount, the receivable state start time, the receivable state end time, the maximum receivable amount per unit time zone, and upper and lower limit values of the total request power amount; and

a plan creating unit configured to accept reservations of power supply and power request from the other energy management systems according to the power supply reservation information and the power request reservation information, and plan power reception amounts and power supply amounts in each of the unit time zone which are delivered to and received from the other power equipment managed by the other power management systems to create a power delivery and reception plan,

wherein the plan creating unit uses at least any one of the reservation information, a capacity of a storage battery if the storage battery managed by the energy management system is present, and occurrence prediction of each of power generation amount and a power load by power equipment if the power equipment managed by the energy management system is present to plan so that excess or deficiency is suppressed between a power amount supplied based on the reservations and a power amount received based on the reservations in each unit time zone through an entire time period of the reservations.

2. The apparatus according to claim 1,

wherein as timing in which the plan creating unit updates the power delivery and reception plan, the plan creating unit temporarily closes reception of the reservation at each specified time, updates the power delivery and reception plan based on a reservation received earlier than a reservation closing time, and notifies a new plan to a scheduling apparatus for which a plan is changed, and

if the plan creating unit cannot create a power delivery and reception plan which satisfies the power supply reservation information and the power request reservation information, the plan creating unit notifies an energy management system being a transmission origin of a reservation which is newly received and which is changed with respect to content thereof after plan updating succeeded previous time that the reservation is not acceptable.

3. The apparatus according to claim 1,

wherein as timing in which the plan creating unit updates the power delivery and reception plan, the plan creating unit temporarily closes reception of the reservation at each specified time, updates the power delivery and reception plan based on a reservation received earlier than a reservation closing time, and notifies a new plan to a scheduling apparatus for which a plan is changed, and

if the plan creating unit cannot create a power delivery and reception plan which satisfies the power supply reservation information and the power request reservation information, the plan creating unit successively repeats replanning by excluding one reservation accepted from an energy management system with a lower priority degree among reservations newly accepted after plan updating of a previous time until succeeding in plan updating, and notifies the energy management system for which the reservation is excluded that the reservation is not acceptable.

4. The apparatus according to claim 1,

wherein as timing in which the plan creating unit updates the power delivery and reception plan, the plan creating unit updates the power delivery and reception plan at each timing in which any one of addition of a new reservation, cancellation of an existing reservation and update of a content of the existing reservation is performed.

5. The apparatus according to claim 1,

wherein power is discretized according to a unit amount,

an initial state is set as a state in which the maximum suppliable amount per unit time zone and the maximum receivable amount per unit time zone is delivered and received with respect to each reservation simultaneously with a start time,

an earliest time in which an accumulated value of a difference between received power and supplied power exceeds an upper and lower limits of a storage capacity of the storage battery is retrieved, and

processing of (A) and (B) is repeated until the accumulation value falls within the range of the upper and lower limits,

(A) finding a power supply reservation which receives power before the earliest time and can shift power of the unit amount to after the earliest time when the accumulated value exceeds an upper limit at the earliest time, and shifting a reception power of the unit amount to after the earliest time, and

(B) finding a power request reservation which provides power before the earliest time, and can shift power of a unit amount to after the earliest time when the accumulated value exceeds the lower limit at the earliest time, and shifting provided power of the unit amount to after the earliest time.

6. The apparatus according to claim 5,

wherein when a reservation capable of shifting power of a unit amount to after the earliest time is not present,

processing (A) and (B) are repeated until a reservation capable of shifting the power of the unit amount to after the earliest time is found, and after the reservation is found, processing returns to repetition of shift processing recited in claim 5,

(A) in a case of exceeding an upper limit of the storage capacity at the earliest time, (1) finding a power supply reservation which starts before the earliest time, and does not exceed the lower limit value of the total suppliable power amount even when power of a unit amount is subtracted from the total suppliable power amount at a present time, and subtracting the power of the unit amount at a time before the earliest time, or (2) finding a power request reservation which starts before the earliest time, and does not exceed the upper limit value of the total request power amount even when the power of the unit amount is added to the total request power amount at the present time, and adding the power of the unit amount at a time before the earliest time, and

(B) in a case of exceeding a lower limit of the storage capacity at the earliest time, (1) finding a power supply reservation which starts before the earliest time, and does not exceed the upper limit value of the total suppliable power amount even if the power of the unit amount is added to the total suppliable power amount of the present time, and adding the power of the unit amount at a time before the earliest deviation time, (2) or finding a power request reservation which starts before the earliest time, and does not exceed the lower limit value of the total power amount even if the power of the unit amount is subtracted from the total request power amount at the present time, and subtracting the power of the unit amount at a time before the earliest time.

7. The apparatus according to claim 1,

wherein the plan creating unit creates a charge and discharge schedule of a storage battery managed by the energy management system as well as the power delivery and reception plan.