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Adaptive pitch control for variable speed wind turbines

Patent ·
OSTI ID:1043895
 [1];  [2]
  1. Boulder, CO
  2. Westminster, CO
+ Show Author Affiliations
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.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC36-99GO10337
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO)
Patent Number(s):
8,174,136
Application Number:
11/816,455
OSTI ID:
1043895
Country of Publication:
United States
Language:
English

References (9)

Pitch-controlled variable-speed wind turbine generation journal January 2001
Periodic Disturbance Accommodating Control for Blade Load Mitigation in Wind Turbines journal November 2003
Disturbance Tracking Control and Blade Load Mitigation for Variable-Speed Wind Turbines journal November 2003
Methods for Increasing Region 2 Power Capture on a Variable-Speed Wind Turbine journal November 2004
Disturbance Tracking and Blade Load Control of Wind Turbines in Variable-Speed Operation conference February 2009
Controls Advanced Research Turbine (CART) Commissioning and Baseline Data Collection report October 2002
Adaptive Torque Control of Variable Speed Wind Turbines report August 2004
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

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Related Subjects

17 WIND ENERGY