System and method for conserving energy resources through storage and delivery of renewable energy

• US 8,311,681 B1
• Filed: 03/09/2012
• Issued: 11/13/2012
• Est. Priority Date: 01/19/2012
• Status: Active Grant

• Current Assignee: Hydrostor Inc.
• Original Assignee: General Compression, Inc.
• Inventors: Marcus, David
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US13/416,566
• Time in Patent Office: 249 Days
• Field of Search: 700/286, 700/291, 700/295, 361/601
• US Class Current: 700/295
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05F 1/66 Regulating electric power
• CPC Class Codes: G06Q 30/0202 Market predictions or forecasting for commercial activities
• CPC Class Codes: G06Q 40/04 Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
• CPC Class Codes: H02J 3/28 Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: H02J 3/30 using dynamo-electric machines coupled to flywheels
• CPC Class Codes: H02J 3/32 using batteries with converting means
• 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 50/14 Marketing, i.e. market research and analysis, surveying, promotions, advertising, buyer profiling, customer management or rewards

Abstract

A system for encouraging the use of renewable energy sources and suitable for the conservation of energy resources through the efficient management of energy storage and delivery includes connections to a power source, an energy storage subsystem, and a power grid. The system includes a power routing subsystem coupled to the source and grid, and adapted to operate in a bypass mode, in which energy is transferred from the source to the grid. The system includes a conversion subsystem coupled to the routing and storage subsystems, and switchable in substantially real-time between a storage mode, in which energy is transferred from the routing to the storage subsystem, and a generation mode, in which energy is transferred from the storage to the routing subsystem for delivery to the grid. The system also includes a controller for directing the modes based at least in part on a market factor.

Claims

1. A system for encouraging the use of renewable energy sources and suitable for the conservation of energy resources through the efficient management of energy storage and delivery, the system comprising:

a connection to a power source;

a connection to an energy storage subsystem;

a connection to a power grid;

a power routing subsystem coupled to the power source and the power grid, and adapted to operate in a bypass mode, wherein energy is transferred from the power source to the power grid;

a conversion subsystem coupled to the power routing subsystem and the storage subsystem, and switchable in substantially real-time between a storage mode, wherein energy is transferred from the power routing subsystem to the storage subsystem, and a generation mode, wherein energy is transferred from the storage subsystem to the power routing subsystem for delivery to the power grid;

a trading subsystem for buying and selling power from and to a power trading market; and

a control subsystem for directing, based at least in part on a market factor, the conversion subsystem and the power routing subsystem to operate simultaneously in the bypass mode and at least one of the storage and generation modes, and for directing the system to utilize power available from the power source, the storage subsystem, and the trading subsystem to fulfill contractual power service requirements.

2. The system of claim 1, wherein the power source is an intermittent power source selected from the group consisting of wind energy, solar energy, wave energy, tidal energy, falling water, hydro energy, biomass energy, and geothermal energy.

3. The system of claim 1, wherein the storage subsystem comprises a storage medium selected from the group consisting of fluidic storage, mechanical storage, kinetic storage, electrical storage, electrochemical storage, and thermal storage.

4. The system of claim 1, wherein the storage subsystem comprises a storage volume in a form selected from the group consisting of a pressure vessel, a subterranean cavern, a well, a flywheel, a battery, piping, a bladder, a hydrostatically pressure-compensated container, a lake, a pond, a liquid storage vessel, a water retention structure, and a capacitor.

5. The system of claim 1, wherein the conversion subsystem is adapted to convert energy to compressed gas, and comprises a motor/generator, a hydraulic pump/motor, a hydraulic actuator, and a compressor/expander connected in one of series or parallel.

6. The system of claim 1, wherein the directing by the control subsystem is further based on a comparison of the market factor to a threshold.

7. The system of claim 6, wherein the directing by the control subsystem is further based at least in part on an available capacity of the storage subsystem.

8. The system of claim 7, wherein the controller switches the conversion subsystem to operate in the storage mode when the market factor is less than the threshold by at least a predetermined margin and there exists available storage capacity.

9. The system of claim 8, wherein the predetermined margin is decreased when the available capacity is greater than a predetermined value, and wherein the predetermined margin is increased when the available capacity is less than a predetermined value.

10. The system of claim 7, wherein the controller directs the system to operate in at least one of the generation mode and the bypass mode when the market factor is greater than the threshold by at least a predetermined margin.

11. The system of claim 10, wherein the predetermined margin is increased when the available capacity is greater than a predetermined value, and wherein the predetermined margin is decreased when the available capacity is less than a predetermined value.

12. The system of claim 6, wherein the directing is further based at least in part on environmental conditions selected from the group consisting of present local environmental conditions, projected local environmental conditions, present local environmental conditions, and remote environmental conditions.

13. The system of claim 6, wherein the directing is further based at least in part on environmental conditions selected from the group consisting of wind speed, wind direction, air temperature, air pressure, humidity, precipitation, cloud cover, season, length of daylight, tidal status, storage temperature, storage time, storage pressure, and day/night temperature differential.

14. The system of claim 6, wherein the threshold is selected from the group consisting of a present supply, a future supply, a present demand, a future demand, an average market price, and a present market price.

15. The system of claim 1, wherein the market factor is selected from the group consisting of a market price of electricity, a present market price of electricity, a future market price of electricity, a trending price of electricity, a supply of electricity, and a demand of electricity.

16. The system of claim 1, wherein the controller further comprises a power delivery algorithm adapted to fulfill a power service selected from the group consisting of baseload, intermediate, peaking, load following, frequency regulation, spinning reserve, non-spinning reserve, black start, reactive power control, load source on demand response, and ramp-rate control.

17. The system of claim 16, wherein the power delivery algorithm is adapted to fulfill a long-duration power service simultaneously with at least one ancillary power service.

18. The system of claim 1, wherein the trading subsystem is further adapted for initiating at least one of a purchase of electricity, an offer to purchase electricity, a sale of electricity, and an offer to sell electricity.

19. The system of claim 18, wherein the trading subsystem is adapted to fulfill a power service by buying electricity at a market price, and selling electricity at a contract price.