OPERATION PLANNING SYSTEM

• US 20150019035A1
• Filed: 11/22/2012
• Published: 01/15/2015
• Est. Priority Date: 01/30/2012
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Noda, Hideki, Obara, Reiko, Kobayashi, Takenori, Kiya, Genki
• Granted Patent: US 9,606,561 B2
• Time in Patent Office: Days
• US Class Current: 700/291
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05F 1/66 Regulating electric power
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/004 Generation forecast, e.g. methods or systems for forecasting future energy generation
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/472 For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

In formulating of a power generation operation schedule to a power grid network including multiple power plants and transformer stations, and, multiple batteries installed in association therewith, an operation planning system stores in advance power generation basic unit information of the power plant, and derivation information of the stored energy in the battery. Power generation basic unit information of the battery where power generation basic unit of the stored energy is added is set based on the power generation basic unit information of the power plant and the derivation information of the stored energy. While selecting a power generation facility from the power plants and the batteries in an order of a smaller value indicated by the power generation basic unit information, the power generation quantity of the selected power generation facility is added to a total power generation quantity until the total power generation quantity matches a demand quantity.

Claims

1. An operation planning system formulating a power generation operation schedule for a power grid network in accordance with a power demand, the power grid network comprising a plurality of power plants, a plurality of transformer stations, and a plurality of batteries installed in association with the power plants and the transformer stations, the plurality of power plants, the plurality of transformer stations, and the plurality of batteries being connected together through a power system, the operation planning system comprising:

a database storing power generation basic unit information of the power plant, and derivation information on stored energy in the battery;

a basic unit determiner setting power generation basic unit information of the battery to which power generation basic unit of the stored energy is added based on the power generation basic unit information of the power plant and the derivation information of the stored energy; and

an adder that sequentially adds, while selecting a power generation facility from the power plants and the batteries in an order of a smaller value indicated by the power generation basic unit information, a power generation quantity of the selected power generation facility to a total power generation quantity until the total power generation quantity matches the demand quantity,

wherein the operation planning system formulates the operation schedule that presents the power generation facility and each power generation quantity in accordance with the demand quantity.

2. The operation planning system according to claim 1, wherein the derivation information is application information indicating an application of the battery.

3. The operation planning system according to claim 2, wherein:

the application information on the battery installed in association with the power plant indicates an application for a fluctuation suppression; and

when the application information indicates an application for a fluctuation suppression, the basic unit determiner adds the power generation basic unit information of the power plant where the battery is installed in association therewith to the power generation basic unit information of the battery associated with the application information.

4. The operation planning system according to claim 2, wherein;

the application information on the battery installed in association with the transformer station indicates an application for a load equalization; and

when the application information indicates an application for a load equalization, the basic unit determiner adds an average value of numeric values indicated by the power generation basic unit information on the respective power plants in the power grid network to the power generation basic unit information of the battery associated with the application information.

5. The operation planning system according to claim 1, further comprising:

a section generator that generates section information associating the power generation facilities to be operated in a linked manner with each other; and

a power-generation-quantity determiner that totals the power generation quantities of the respective power generation facilities in the section information to set the net power generation quantity of the section,

wherein;

the basic unit determiner calculates a basic unit of the section based on the power generation quantity of each power generation facility in the section information and a basic unit thereof; and

the adder adds, while selecting the section in an order of a smaller value indicated by the power generation basic unit information, the power generation quantity of the selected section to the total power generation quantity until the total power generation quantity matches the demand quantity.

6. The operation planning system according to claim 1, further comprising a power-generation-quantity determiner that sets a discharging quantity of the battery,

wherein the power-generation-quantity determiner comprises:

an allowable quantity calculator calculating an allowable discharging quantity obtained by subtracting the lower limit constraint value of a remaining battery charge from the charging quantity of the battery;

an operation limit quantity calculator calculating a discharging operation limit quantity based on a limit of a discharging speed of the battery on a basis of an installed environment of the battery; and

a determiner comparing the allowable discharging quantity with the discharging operation limit quantity to set either one of the allowable discharging quantity and the discharging operation limit quantity as the discharging quantity of the battery.

7. The operation planning system according to claim 1, wherein:

the database further stores charging/discharging basic unit information indicating an environmental load of a charging/discharging loss by the battery; and

the basic unit determiner adds a numeric value indicated by the charging/discharging basic unit information to the power generation basic unit of the battery.

8. The operation planning system according to claim 1, wherein:

the database further stores manufacturing/disposing basic unit information indicating an environmental load caused by manufacturing and disposing processes of the battery; and

the basic unit determiner adds, to the basic unit of the battery, a value obtained by distributing the environmental load indicated by the manufacturing/disposing basic unit information to each charging/discharging cycle.

9. The operation planning system according to claim 8, wherein:

the database further stores recycle rate information indicating a rate of an environmental load of reusable parts of the battery; and

the basic unit determiner multiplies the manufacturing/disposing basic unit information by the rate indicated by the recycle rate information, and adds, to the basic unit of the battery, a value obtained by distributing a multiplication result to each charging/discharging cycle.

10. The operation planning system according to claim 1, wherein:

the database further stores maintenance basic unit information indicating an environmental load caused by a maintenance work for the battery; and

the basic unit determiner adds, to the basic unit of the battery, a value obtained by distributing the environmental load indicated by the maintenance basic unit information to each charging/discharging cycle.

11. The operation planning system according to claim 8, wherein the basic unit determiner:

stores, for each discharging lower limit depth of the battery, information indicating a number of cycles until the battery reaches a lifetime; and

calculates a number of cycles until the battery reaches the lifetime based on the information indicating the discharging lower limit depth of the battery.

12. The operation planning system according to claim 1, further comprising a presenter calculating a reduction quantity of an environmental load and presenting the reduction quantity together with the operation schedule.

13. The operation planning system according to claim 12, wherein the presenter converts the reduction quantity into credit price information, and presents the credit price information together with the operation schedule.

14. The operation planning system according to claim 1, provided in a local power-feeding instruction station connected to the power grid network and a central power-feeding instruction station.