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Title: Adaptive pitch control for variable speed wind turbines

Abstract

An adaptive method for adjusting blade pitch angle, and controllers implementing such a method, for achieving higher power coefficients. Average power coefficients are determined for first and second periods of operation for the wind turbine. When the average power coefficient for the second time period is larger than for the first, a pitch increment, which may be generated based on the power coefficients, is added (or the sign is retained) to the nominal pitch angle value for the wind turbine. When the average power coefficient for the second time period is less than for the first, the pitch increment is subtracted (or the sign is changed). A control signal is generated based on the adapted pitch angle value and sent to blade pitch actuators that act to change the pitch angle of the wind turbine to the new or modified pitch angle setting, and this process is iteratively performed.

Inventors:
 [1];  [2]
  1. Boulder, CO
  2. Westminster, CO
Issue Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1043895
Patent Number(s):
8174136
Application Number:
11/816,455
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS
DOE Contract Number:  
AC36-99GO10337
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY

Citation Formats

Johnson, Kathryn E, and Fingersh, Lee Jay. Adaptive pitch control for variable speed wind turbines. United States: N. p., 2012. Web.
Johnson, Kathryn E, & Fingersh, Lee Jay. Adaptive pitch control for variable speed wind turbines. United States.
Johnson, Kathryn E, and Fingersh, Lee Jay. Tue . "Adaptive pitch control for variable speed wind turbines". United States. https://www.osti.gov/servlets/purl/1043895.
@article{osti_1043895,
title = {Adaptive pitch control for variable speed wind turbines},
author = {Johnson, Kathryn E and Fingersh, Lee Jay},
abstractNote = {An adaptive method for adjusting blade pitch angle, and controllers implementing such a method, for achieving higher power coefficients. Average power coefficients are determined for first and second periods of operation for the wind turbine. When the average power coefficient for the second time period is larger than for the first, a pitch increment, which may be generated based on the power coefficients, is added (or the sign is retained) to the nominal pitch angle value for the wind turbine. When the average power coefficient for the second time period is less than for the first, the pitch increment is subtracted (or the sign is changed). A control signal is generated based on the adapted pitch angle value and sent to blade pitch actuators that act to change the pitch angle of the wind turbine to the new or modified pitch angle setting, and this process is iteratively performed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {5}
}

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Works referenced in this record:

Disturbance Tracking Control and Blade Load Mitigation for Variable-Speed Wind Turbines
journal, November 2003


Pitch-controlled variable-speed wind turbine generation
journal, January 2001


Methods for Increasing Region 2 Power Capture on a Variable Speed HAWT
conference, June 2012


Adaptive Torque Control of Variable Speed Wind Turbines for Increased Region 2 Energy Capture
conference, June 2012


Methods for Increasing Region 2 Power Capture on a Variable-Speed Wind Turbine
journal, November 2004


Periodic Disturbance Accommodating Control for Blade Load Mitigation in Wind Turbines
journal, November 2003