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US7629705: Method and apparatus for operating electrical machines

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Filing Information

Inventor(s) Sidney A. Barker · Anthony Klodowski · John D'Atre · Einar Larsen · Goran Drobnjak ·
Assignee(s) General Electric Company ·
Attorney/Agent(s) James McGinness, Esq. · Armstrong Teasdale LLP ·
Primary Examiner Julio C. Gonzalez ·
Application Number US11551430
Filing date 10/20/2006
Issue date 12/08/2009
Prior Publication Data
Predicted expiration date 10/06/2027
Patent term adjustment 351
U.S. Classifications 290/55  · 322/28  · 322/24  ·
International Classifications H02P1100  · H02P900  · H02P904  ·
Kind CodeB2
17 Claims, 6 Drawings


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.

Independent Claims | See all claims (17)

  1. 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).
  2. 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).
  3. 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.
  4. 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.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
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
* cited by examiner

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