Method for retrofitting wind turbine farms

• US 20060171086A1
• Filed: 02/01/2005
• Published: 08/03/2006
• Est. Priority Date: 02/01/2005
• Status: Active Grant

• Current Assignee: VRB Enery Inc.
• Original Assignee: VRB Power Systems Inc.
• Inventors: Hennessy, Timothy David John, Kuntz, Mark T.
• Granted Patent: US 7,227,275 B2
• Time in Patent Office: Days
• US Class Current: 361/62
• CPC Class Codes: F03D 9/11 storing electrical energy
• CPC Class Codes: F05B 2240/96 as part of a wind turbine farm
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin

Abstract

A power generation system with a predetermined rating limit includes one or more wind turbine generators and a vanadium redox battery. The vanadium redox battery absorbs excess energy to ensure that the rating limit is not exceeded, provide system stability, and improve power generation availability. The power generation system may further include a control system to manage the vanadium redox battery'"'"'s absorption and power generation to control system stability and system frequency.

Claims

1. A method for retrofitting a wind power generation system that includes wind turbine generators and a rating limit for grid interconnection, comprising:

replacing the wind turbine generators having a collective energy output with replacement wind turbine generators having an increased collective energy output, wherein the increased collective energy output exceeds the rating limit; and

placing a vanadium redox battery in electrical communication with the replacement wind turbine generators, the vanadium redox battery sized to absorb and store the difference between the increased collective energy output and the collective energy output.

2. The method of claim 1, further comprising:

placing a control system in electrical communication with the replacement wind turbine generators and the vanadium redox battery;

the control system monitoring total energy output from the wind turbine generators and the vanadium redox battery; and

the control system operating the vanadium redox battery to store energy and ensure total energy output does not exceed the rating limit.

3. The method of claim 2, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to absorb the difference between total energy output and the rating limit when the total energy output exceeds the rating limit.

4. The method of claim 2, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to discharge the difference between total energy output and the rating limit when the rating limit exceeds the total energy output.

5. The method of claim 1, wherein the replacement wind turbine generators generate AC.

6. The method of claim 1, wherein the replacement wind turbine generators generate DC.

7. A method for retrofitting a wind power generation system that includes a wind turbine generator and a rating limit for grid interconnection, comprising:

replacing the wind turbine generator having an energy output with a replacement wind turbine generator having an increased energy output, wherein the increased energy output exceeds the rating limit; and

placing a vanadium redox battery in electrical communication with the replacement wind turbine generators, the vanadium redox battery sized to absorb and store the difference between the increased energy output and the energy output.

8. The method of claim 7, further comprising:

placing a control system in electrical communication with the replacement wind turbine generator and the vanadium redox battery;

the control system monitoring total energy output from the wind turbine generator and the vanadium redox battery; and

the control system operating the vanadium redox battery to store energy and ensure total energy output does not exceed the rating limit.

9. The method of claim 8, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to absorb the difference between total energy output and the rating limit when the total energy output exceeds the rating limit.

10. The method of claim 8, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to discharge the difference between total energy output and the rating limit when the rating limit exceeds the total energy output.

11. The method of claim 7, wherein the replacement wind turbine generator generates AC.

12. The method of claim 7, wherein the replacement wind turbine generator generates DC.

13. A method for retrofitting a wind power generation system that includes wind turbine generators and a rating limit for grid interconnection, comprising:

replacing the wind turbine generators having a collective energy output with replacement wind turbine generators having an increased collective energy output, wherein the increased collective energy output exceeds the rating limit;

placing a vanadium redox battery in electrical communication with the replacement wind turbine generators, the vanadium redox battery sized to absorb and store the difference between the increased collective energy output and the collective energy output;

placing a control system in electrical communication with the replacement wind turbine generators and the vanadium redox battery;

the control system monitoring total energy output from the wind turbine generators and the vanadium redox battery;

the control system comparing the total energy output to the rating limit; and

the control system operating the vanadium redox battery to ensure that total energy output does not exceed the rating limit.

14. The method of claim 13, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to absorb the difference between total energy output and the rating limit when the total energy output exceeds the rating limit.

15. The method of claim 13, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to discharge the difference between total energy output and the rating limit when the rating limit exceeds the total energy output.

16. The method of claim 13, wherein the replacement wind turbine generators generate AC.

17. The method of claim 13, wherein the replacement wind turbine generators generate DC.

18. A wind power generation system having a rating limit for grid interconnection, comprising:

a plurality of wind turbine generators having a collective energy output that exceeds the rating limit; and

a vanadium redox battery in electrical communication with the wind turbine generators and sized to substantially store the difference between the collective energy output and the rating limit.

19. The wind power generation system of claim 18, further comprising a control system in electrical communication with the wind turbine generators and the vanadium redox battery and including,

a processor, and

a memory having stored thereon executable instructions for performing the method of:

monitoring total energy output from the wind turbine generators and the vanadium redox battery,

comparing the total energy output to the rating limit, and

operating the vanadium redox battery to ensure that total energy output does not exceed the rating limit.

20. The wind power generation system of claim 19, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to absorb the difference between total energy output and the rating limit when the total energy output exceeds the rating limit.

21. The wind power generation system of claim 19, wherein operating the vanadium redox battery includes instructing the vanadium redox battery to discharge the difference between total energy output and the rating limit when the rating limit exceeds the total energy output.

22. The method of claim 19, wherein the replacement wind turbine generators generate AC.

23. The method of claim 19, wherein the replacement wind turbine generators generate DC.