IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0770148
(2007-06-28)
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등록번호 |
US-7462955
(2008-12-09)
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발명자
/ 주소 |
- McNamara,James L.
- Skroski,E. Michael
- Tierson,Jan
- Petter,Jeffrey K.
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출원인 / 주소 |
- Northern Power Systems, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
24 인용 특허 :
2 |
초록
▼
A system for providing auxiliary electrical power is provided. The system includes a plurality of loads and a plurality of power sources, each providing electrical power to one or more of the plurality of loads. At least one generator is electrically connected to the plurality of loads. Also, a plu
A system for providing auxiliary electrical power is provided. The system includes a plurality of loads and a plurality of power sources, each providing electrical power to one or more of the plurality of loads. At least one generator is electrically connected to the plurality of loads. Also, a plurality of power converters, each of the plurality of power converters being electrically connected between the at least one generator and one of the plurality of loads. An arrangement is also provided for increasing the reliability of power to a load through a connection with a parallel utility network.
대표청구항
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What is claimed is: 1. An electrical power system, comprising: at least one utility source of alternating current (AC) power; a plurality of transformer secondary windings in electrical communication with said at least one utility source; a plurality of AC power loads electrically connected to said
What is claimed is: 1. An electrical power system, comprising: at least one utility source of alternating current (AC) power; a plurality of transformer secondary windings in electrical communication with said at least one utility source; a plurality of AC power loads electrically connected to said plurality of transformer secondary windings so as to draw AC power from the at least one utility source via corresponding respective ones of said plurality of transformer secondary windings, said plurality of transformer secondary windings electrically connected to said plurality of transformer secondary windings at a plurality of corresponding respective plurality of electrical nodes; an AC generator for providing auxiliary AC power to ones of said plurality of AC power loads simultaneously with the AC power from said at least one utility source; and a plurality of AC-to-AC power converters electrically coupled between said AC generator and corresponding respective ones of said plurality of electrical nodes. 2. An electrical power system according to claim 1, wherein at least one of said plurality of AC-to-AC power converters comprises a pair of AC-to-direct current (DC) power converters linked by a DC link. 3. An electrical power system according to claim 2, further comprising a DC backup power supply electrically connected to said DC link. 4. An electrical power system according to claim 3, wherein said DC backup power supply comprises a DC storage device and a backup power generator. 5. An electrical power system according to claim 1, further comprising a transformer primary winding electrically coupled to said at least one utility source, at least two of said plurality of transformer secondary windings being electrically coupled to said transformer primary winding. 6. An electrical power system according to claim 1, comprising at least two utility sources of AC power, ones of said plurality of AC power loads electrically connected to corresponding respective ones of said at least two utility sources. 7. An electrical power system according to claim 1, wherein said AC generator is a cogeneration generator. 8. An electrical power system according to claim 1, wherein said plurality of AC electrical loads are located in a facility and said cogeneration generator provides direct thermal energy to the facility. 9. An electrical power system according to claim 1, wherein each of the plurality of AC-to-AC power converters has an input side and an output side and is configured to independently control reactance on each of said first and second sides. 10. An electrical power system according to claim 1, wherein each of said plurality of AC-to-AC power converters is configured to generate a signal when AC power from said at least one utility source to the corresponding one of said plurality of AC power loads experiences an electrical fault, the system further comprising a control system in operative communication with ones of said plurality of AC-to-AC power converters and said AC generator, said control system configured to control said AC generator as a function of ones of said signal. 11. An electrical power system according to claim 10, wherein said AC power generator is a variable speed generator. 12. An auxiliary alternating current (AC) power system for a facility containing a plurality of AC power loads, wherein at least one utility source of AC power provides AC power to the plurality of AC power loads through a plurality of corresponding respective transformer secondary windings and a plurality of corresponding respective electrical nodes located between corresponding respective ones of the plurality of corresponding respective transformer secondary windings and the plurality of AC power loads, the auxiliary power system comprising: an AC generator for providing auxiliary AC power to ones of the plurality of AC power loads simultaneously with the AC power from the at least one utility source; an auxiliary power distribution bus electrically connecting said AC generator to each of the plurality of AC power loads via said plurality of corresponding respective electrical nodes; and a plurality of AC-to-AC power converters electrically coupled in said auxiliary power distribution bus between said AC generator and corresponding respective ones of said plurality of electrical nodes. 13. An auxiliary AC power system according to claim 12, wherein at least one of said plurality of AC-to-AC power converters comprises a pair of AC-to-direct current (DC) power converters linked by a DC link. 14. An auxiliary AC power system according to claim 13, further comprising a DC backup power supply electrically connected to said DC link. 15. An auxiliary AC power system according to claim 14, wherein said DC backup power supply comprises a DC storage device and a backup power generator. 16. An auxiliary AC power system according to claim 12, wherein said AC generator is a cogeneration generator for providing direct thermal energy to the facility. 17. An auxiliary AC power system according to claim 12, wherein each of the plurality of AC-to-AC power converters has an input side and an output side and is configured to independently control reactance on each of said first and second sides. 18. An auxiliary AC power system according to claim 12, wherein each of said plurality of AC-to-AC power converters is configured to generate a signal when AC power from said at least one utility source to the corresponding one of the plurality of AC power loads experiences an electrical fault, the system further comprising a control system in operative communication with ones of said plurality of AC-to-AC power converters and said AC generator, said control system configured to control said AC generator as a function of ones of said signal. 19. An auxiliary AC power system according to claim 18, wherein said AC power generator is a variable speed generator. 20. An electrical power system, comprising: a utility source of alternating current (AC) power; a first transformer secondary winding in electrical communication with said utility source; a second transformer secondary winding in electrical communication with said utility source; a first AC power load electrically connected to said first transformer secondary winding at a first electrical node; a second AC power load electrically connected to said second transformer secondary winding at a second electrical node; a first disconnect switch electrically connected in series between said first transformer secondary winding and said first electrical node; a second disconnect switch electrically connected in series between said second transformer secondary winding and said second electrical node; and an AC-to-AC power converter electrically connected between said first and second electrical nodes. 21. An electrical power system according to claim 20, further comprising an AC generator electrically connected to said first electrical node. 22. An electrical power system according to claim 21, wherein said AC-to-AC power converter is operatively configured to control reactive power at each of said first and second electrical nodes. 23. An electrical power system according to claim 21, wherein said AC-to-AC power converter is operatively configured to condition electrical AC power from said AC power generator when each of said first and second disconnect switches are open and said AC power generator is operating. 24. An electrical power system according to claim 21, wherein said AC generator is a cogeneration generator for providing direct thermal energy to the facility. 25. An electrical power system according to claim 24, wherein, when the electrical power system is operating, said AC generator provides AC power to said first electrical node and said utility source provides AC power to said first electrical node simultaneously with one another. 26. An electrical power system according to claim 20, wherein said AC-to-AC power converter is operatively configured to control reactive power at each of said first and second electrical nodes. 27. A method of providing electrical power to multiple electrical loads, comprising: receiving alternating current (AC) power from a utility grid and providing the AC power to first and second AC loads; simultaneously with said receiving of AC power from the utility grid, providing AC power from an auxiliary AC power source to the first and second AC loads, wherein the AC power from the auxiliary AC power source is asynchronous relative to the utility grid; adjusting the AC power to the first AC load from the auxiliary AC power source so as to be compatible with electrical characteristics of the first AC load and the utility grid; and adjusting the AC power to the second AC load from the auxiliary AC power source to be compatible with electrical characteristics of the second AC load and the utility grid. 28. The method of claim 27, further comprising: detecting a change in the electrical characteristics of the AC power provided by the utility grid to the first AC load; and adjusting the AC power to the first AC load in response to the change. 29. The method of claim 28, further comprising adjusting the output of the auxiliary AC power source in response to the change. 30. The method of claim 28, further comprising adjusting the AC output of the auxiliary AC power source in response to a change in the first AC load. 31. The method of claim 27, farther comprising converting AC generated by the auxiliary AC power source to direct current. 32. The method of claim 31, further comprising converting the direct current back to AC before the power is adjusted to be compatible with the electrical characteristics of the first AC load and the utility grid. 33. The method of claim 27, further comprising: receiving AC power from a second utility grid and providing it to a third AC load, wherein the AC power from the second utility grid is asynchronous with the AC power from the first utility grid; providing AC power from the auxiliary AC power source to the third AC load; and adjusting the AC power to the third AC load from the auxiliary AC power source so as to be compatible with the electrical characteristics of the third AC load and the second utility grid. 34. The method of claim 27, wherein the first and second AC loads are located in a facility having a thermal energy need and the auxiliary AC power source generates thermal energy, the method further including providing the thermal energy to the facility so as to at least partially satisfy the thermal energy need of the facility.
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