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Title: Advanced Wind Turbine Controls Reduce Loads (Fact Sheet)

Abstract

NREL's National Wind Technology Center provides the world's only dedicated turbine controls testing platforms.

Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy Wind and Water Power Program
OSTI Identifier:
1038306
Report Number(s):
NREL/FS-5000-54514
TRN: US201208%%412
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Related Information: NREL Highlights, Research & Development, NREL (National Renewable Energy Laboratory)
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; TESTING; TURBINES; WIND TURBINES; WIND POWER; NWTC; CONTROLS; CONTROLS ADVANCED RESEARCH TURBINES; CARTS; Wind Energy

Citation Formats

Not Available. Advanced Wind Turbine Controls Reduce Loads (Fact Sheet). United States: N. p., 2012. Web.
Not Available. Advanced Wind Turbine Controls Reduce Loads (Fact Sheet). United States.
Not Available. Thu . "Advanced Wind Turbine Controls Reduce Loads (Fact Sheet)". United States. doi:. https://www.osti.gov/servlets/purl/1038306.
@article{osti_1038306,
title = {Advanced Wind Turbine Controls Reduce Loads (Fact Sheet)},
author = {Not Available},
abstractNote = {NREL's National Wind Technology Center provides the world's only dedicated turbine controls testing platforms.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2012},
month = {Thu Mar 01 00:00:00 EST 2012}
}

Conference:
Other availability
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  • This fact sheet outlines the systems and controls analysis and testing that takes place at the NWTC on the Controls Advanced Research Turbines.
  • This report describes NREL's efforts to design, implement, and test advanced controls for maximizing energy extraction and reducing structural dynamic loads in wind turbines.
  • Wind turbines are complex, nonlinear, dynamic systems forced by aerodynamic, gravitational, centrifugal, and gyroscopic loads. The aerodynamics of wind turbines is nonlinear, unsteady, and complex. Turbine rotors are subjected to a complicated three-dimensional (3D) turbulent wind inflow field with imbedded coherent vortices that drive fatigue loads and reduce lifetime. Design of control algorithms for wind turbines must account for multiple control objectives. Future large multi-megawatt turbines must be designed with lighter weight structures, using active controls to mitigate fatigue loads, maximize energy capture, and add active damping to maintain stability for these dynamically active structures operating in a complex environment.more » Researchers at the National Renewable Energy Laboratory are designing, implementing, and testing advanced controls to maximize energy extraction and reduce structural dynamic loads. These control designs are based on a linear model of the turbine that is generated by specialized modeling software. This paper describes testing of a control algorithm to mitigate blade, tower, and drivetrain loads using advanced state-space control methods. The controller uses independent blade pitch to regulate the turbine's speed in Region 3, mitigate the effects of shear across the rotor disk, and add active damping to the tower's first fore-aft bending mode. Additionally, a separate generator torque control loop is designed to add active damping to the tower's first side-side mode and the first drivetraintorsion mode. This paper discusses preliminary implementation and field tests of this controller in the Controls Advanced Research Turbine at the National Renewable Energy Laboratory. Also included are preliminary comparisons of the performance of this controller to results from a typical baseline Proportional-Integral-Derivative controller designed with just Region 3 speed regulation as the goal.« less