Method and apparatus for operating electrical machines
Filing Information
- Patent Number: US7629705
- Application Number: US11551430
- Filing date: 10/20/2006
- Issue date: 12/08/2009
- Prior Publication Data:
- US20080093853 - 04/24/2008
- Predicted expiration date: 10/06/2027
- Patent term adjustment: 351
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analyzing 100 million+ documents to uncover your network...- U.S. Classifications: 290/55 · 322/28 · 322/24 ·
- International Classifications: H02P1100 · H02P900 · H02P904 ·
Abstract
A method for operating an electrical machine includes coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to and from the electrical machine. The method also includes configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time.References Cited
U.S. Patent Documents
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| US5239251* | The State of Oregon Acting by and through the State Board of Higher Education on Behalf of Oregon State University | Lauw | Aug 1993 |
| US6583521* | Lagod et al. | Jun 2003 | |
| US6693409 | Northern Power Systems, Inc. | Lynch et al. | Feb 2004 |
| US6850426 | Honeywell International Inc. | Kojori et al. | Feb 2005 |
| US20040145188* | Janssen et al. | Jul 2004 | |
| US20040145357 | Lynch et al. | Jul 2004 | |
| US20060002157 | Northern Power Systems, Inc. | Petter et al. | Jan 2006 |
| US20070132248* | General Electric Company | Weng et al. | Jun 2007 |
| US20070290506* | WALLING REIGH | Walling | Dec 2007 |
| US20080238215* | General Electric Company | Ye et al. | Oct 2008 |
Referenced By
The current document is not referenced by other documents.Patent Family
The current document is not in a family.Independent Claims | See all claims (17)
- 1. A method for operating an electrical machine, said method comprising: coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to the electrical machine; and configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, said configuring the electrical machine comprising: electrically coupling at least a portion of a control system to at least a portion of the electric power system; coupling the control system in electronic data communication with at least a portion of the electrical machine; and configuring the electrical machine and the control system such that the electrical machine remains electrically connected to the electric power system during and subsequent to the voltage amplitude of the electric power system decreasing below the predetermined range including approximately zero volts for the undetermined period of time, thereby facilitating zero voltage ride through (ZRVT).
- 7. A control system for an electrical machine, the electrical machine configured to be electrically coupled to an electric power system, wherein the electric power system is configured to transmit at least one phase of electric power to the electrical machine, said control system facilitates the electrical machine remaining electrically connected to the electric power system during and subsequent to at least one of: at least one voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time; and a voltage amplitude of each phase of the electric power system decreasing to approximately zero volts for a predetermined period of time, thereby facilitating zero voltage ride through (ZVRT).
- 9. A control system for an electrical machine, the electrical machine configured to be electrically coupled to an electric power system, wherein the electric power system is configured to transmit at least one phase of electric power to the electrical machine, said control system facilitates the electrical machine remaining electrically connected to the electric power system during and subsequent to at least one voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, said control system comprising at least one phase-locked loop (PLL) regulator coupled in electronic data communication with at least a portion of the electric power system, said PLL regulator comprising: at least one PLL comprising at least one phase detection scheme and at least one proportional-integral (PI) filter scheme; and at least one PLL state machine coupled in electronic data communication with at least a portion of said PLL.
- 13. A wind turbine comprising: at least one electric power generator configured to be electrically coupled to an electric power system, wherein the electric power system is configured to transmit at least one phase of electric power to and from said generator; at least one control system configured to be electrically coupled to the electric power system, said control system facilitates the electrical machine remaining electrically connected to the electric power system during and subsequent to at least one voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time; and at least one phase-locked loop (PLL) regulator coupled in electronic data communication with at least a portion of the electric power system, said PLL regulator comprising: at least one PLL comprising at least one phase detection scheme and at least one proportional-integral (PI) filter scheme; and at least one PLL state machine coupled in electronic data communication with at least a portion of said PLL.
