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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):
8,174,136
Application Number:
11/816,455
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO) NREL
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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