System and method for energy management

• US 9,335,747 B2
• Filed: 05/16/2013
• Issued: 05/10/2016
• Est. Priority Date: 10/23/2009
• Status: Expired due to Fees

• Current Assignee: Viridity Energy Solutions, Inc.
• Original Assignee: Viridity Energy Incorporated
• Inventors: Steven, Alain P., Zibelman, Audrey A.
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US13/895,894
• Publication Number:
  US 20140067142A1
• Time in Patent Office: 1,090 Days
• Field of Search: 700/291, 700/295
• US Class Current: 1/1
• CPC Class Codes: G05B 13/041 in which a variable is automatically adjusted to optimise the performance
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: G05F 1/66 Regulating electric power
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 2300/10 The dispersed energy generation being of fossil origin, e.g. diesel generators
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/466 Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
• CPC Class Codes: H02S 10/00 PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02P 90/84 Greenhouse gas [GHG] management systems
• CPC Class Codes: Y04S 10/12 Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
• 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
• CPC Class Codes: Y04S 50/10 : Energy trading, including energy flowing from end-user application to grid

Abstract

Embodiments of the present invention assist customers in managing the four types of energy assets, that is, generation, storage, usage, and controllable load assets. Embodiments of the present invention for the first time develop and predict a customer baseline (“CBL”) usage of electricity, using a predictive model based on simulation of energy assets, based on business as usual (“BAU”) of the customer'"'"'s facility. The customer is provided with options for operating schedules based on algorithms, which allow the customer to maximize the economic return on its generation assets, its storage assets, and its load control assets. Embodiments of the invention enable the grid to verify that the customer has taken action to control load in response to price. This embodiment of the invention calculates the amount of energy that the customer would have consumed, absent any reduction of use made in response to price. Specifically, the embodiment models the usage of all the customer'"'"'s electricity consuming devices, based on the customer'"'"'s usual conditions. This model of the expected consumption can then be compared to actual actions taken by the customer, and the resulting consumption levels, to verify that the customer has reduced consumption and is entitled to payment for the energy that was not consumed.

Claims

1. A method for optimizing the use of electric energy by a facility comprising a plurality of energy assets, the method comprising:

modeling, using a at least one processor, the usage of electric energy by the facility, by creating a simulation model of the facility;

wherein the dynamic simulation model of the facility comprises a computation of thermodynamics properties of the facility, and

wherein the dynamic simulation model is adaptive to at least one physical change in the facility based on a parametric estimation;

calculating, using the at least one processor, a customer baseline (“

CBL”

) based on the dynamic simulation model, wherein the CBL provides an estimate of energy consumption of the facility as a function of time; and

determining, using the at least one processor, a plan for controlling the operation of at least one of the plurality of energy assets;

(i) to reduce an electricity provider'"'"'s overall charge to the facility for electric energy, and/or (ii) to provide a revenue source to the facility, the determining being done on the basis of the dynamic simulation model, the CBL, and variations in the price of electric energy in the wholesale market during a defined time period.

2. The method of claim 1, wherein the energy assets comprise at least one of:

an energy generation asset, an energy storage asset, an energy usage asset, and a controllable load asset.

3. The method of claim 1, wherein the step of determining a plan for controlling the operation of at least one of the plurality of energy assets is also based on weather prediction data provided to the at least one processor and/or price prediction data provided to the at least one processor.

4. The method of claim 1, wherein said at least one of the plurality of energy assets is a controllable air conditioning unit.

5. The method of claim 1, wherein the facility further comprises an energy storage device and a solar generator in communication with the energy storage device, the method further comprising:

controlling a use of the solar generation by a control signal automatically generated from data derived using the at least one processor, to charge the energy storage device with solar generation during a time when the forecast wholesale electricity price of energy is below a first predetermined level, and

controlling the energy storage device by a control signal automatically generated from the data derived from the at least one processor, to discharge the energy storage device to a utility power grid when the forecast wholesale electricity price of energy charged to the facility by the energy provider is above a second predetermined level.

6. The method of claim 1, wherein the facility further comprises an energy storage device in communication with a utility power grid, the method further comprising:

controlling the energy storage device by control signals automatically generated from data derived from the at least one processor to charge the energy storage device when the forecast wholesale electricity price of energy is below a first predetermined level, and

controlling the energy storage device by control signals automatically generated from the data derived from the at least one processor to discharge the energy storage device to the utility power grid when the forecast wholesale electricity price of energy charged is above a second predetermined level.

7. The method of claim 1, further comprising generating, using at least one processor, control signals based on the plan.

8. The method of claim 7, further comprising controlling, using the generated control signals, at least one of the plurality of energy assets so that operation of the facility conforms to the plan.

9. The method of claim 1, wherein the dynamic simulation model takes as input at least one of a weather forecast and a prediction of the occupancy of the facility.

10. The method of claim 1, wherein the dynamic simulation model predicts the dynamic load consumption behavior of the facility and the plurality of energy assets.

11. The method of claim 1, wherein the dynamic simulation model is created using an iterative process, and wherein the iterative process comprises tuning the dynamic simulation model based on data representative of physical properties of the facility.

12. A computer system for optimizing use of electric energy by a facility comprising a plurality of energy assets, the computer system comprising:

at least one memory to store processor-executable instructions; and

at least one processor communicatively coupled to the at least one memory, wherein, upon execution of the processor-executable instructions, the at least one processor executes a method comprising;

modeling, using at least one processor, the usage of electric energy by the facility, by creating a simulation model of the facility;

wherein the dynamic simulation model of the facility comprises a computation of thermodynamics properties of the facility, and

wherein the dynamic simulation model is adaptive to at least one physical change in the facility based on a parametric estimation;

calculating, using the at least one processor, a customer baseline (“

CBL”

) based on the dynamic simulation model, wherein the CBL provides an estimate of energy consumption of the facility as a function of time; and

determining, using the at least one processor, a plan for controlling the operation of at least one of the plurality of energy assets;

(i) to reduce an electricity provider'"'"'s overall charge to the facility for electric energy, and/or (ii) to provide a revenue source to the facility, the determining being done on the basis of the dynamic simulation model, the CBL, and variations in the price of electric energy in the wholesale market during a defined time period.

13. The computer system of claim 12, wherein the energy assets comprise at least one of:

an energy generation asset, an energy storage asset, an energy usage asset, and a controllable load asset.

14. The computer system of claim 12, wherein the step of determining a plan for controlling the operation of at least one of the plurality of energy assets is also based on weather prediction data provided to the at least one processor and/or price prediction data provided to the at least one processor.

15. The computer system of claim 12, wherein said at least one of the plurality of energy assets is a controllable air conditioning unit.

16. The computer system of claim 12, wherein the facility further comprises an energy storage device and a solar generator in communication with the energy storage device, the method further comprising:

controlling a use of the solar generation by a control signal automatically generated from data derived using the at least one processor, to charge the energy storage device with solar generation during a time when the forecast wholesale electricity price of energy is below a first predetermined level, and

controlling the energy storage device by a control signal automatically generated from the data derived from the at least one processor, to discharge the energy storage device to a utility power grid when the forecast wholesale electricity price of energy charged to the facility by the energy provider is above a second predetermined level.

17. The computer system of claim 12, wherein the facility further comprises an energy storage device in communication with a utility power grid, the method further comprising:

controlling the energy storage device by control signals automatically generated from data derived from the at least one processor to charge the energy storage device when the forecast wholesale electricity price of energy is below a first predetermined level, and

controlling the energy storage device by control signals automatically generated from the data derived from the at least one processor to discharge the energy storage device to the utility power grid when the forecast wholesale electricity price of energy charged is above a second predetermined level.

18. The computer system of claim 12, wherein the method further comprises generating, using at least one processor, control signals based on the plan.

19. The computer system of claim 18, wherein the method further comprises controlling, using the generated control signals, at least one of the plurality of energy assets so that operation of the facility conforms to the plan.

20. The computer system of claim 12, wherein the dynamic simulation model takes as input at least one of a weather forecast and a prediction of the occupancy of the facility.

21. The computer system of claim 12, wherein the dynamic simulation model predicts the dynamic load consumption behavior of the facility and the plurality of energy assets.

22. The computer system of claim 12, wherein the dynamic simulation model is created using an iterative process, and wherein the iterative process comprises tuning the dynamic simulation model based on data representative of physical properties of the facility.