Design of Controls to Attenuate Loads in the Controls Advanced Research Turbine: Preprint

Conference · Sat Nov 01 00:00:00 EST 2003

OSTI ID:15005823

Wright, A D; Balas, M J

Designing wind turbines to maximize energy production and increase fatigue life is a major goal of the wind industry. To achieve this goal, we must design wind turbines to extract maximum energy and reduce component and system loads. This paper applies modern state-space control design methods to a two-bladed teetering-hub upwind machine located at the National Wind Technology Center*. The design objective is to regulate turbine speed in region 3 (above rated wind speed) and enhance damping in several low-damped flexible modes of the turbine. The controls approach is based on the Disturbance Accommodating Control (DAC) method and provides accountability for wind-speed disturbances. First, controls are designed using the single control input rotor collective pitch to stabilize the first drive-train torsion as well as the tower first fore-aft bending modes. Generator torque is then incorporated as an additional control input. This reduces some of the demand placed on the rotor collective pitch control system and enhances first drive train torsion mode damping. Individual blade pitch control is then used to attenuate wind disturbances having spatial variation over the rotor and effectively reduces blade flap deflections caused by wind shear.

• Research Organization: National Renewable Energy Lab., Golden, CO. (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC36-99-GO10337
• OSTI ID: 15005823
• Report Number(s): NREL/CP-500-35084; TRN: US200324%%378
• Resource Relation: Conference: Prepared for the 2004 ASME Wind Energy Symposium, Reno, NV (US), 01/05/2004--01/08/2004; Other Information: PBD: 1 Nov 2003
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
BENDING
CONTROL SYSTEMS
DAMPING
DESIGN
DISTURBANCES
PRODUCTION
ROTORS
SHEAR
TORQUE
TORSION
TURBINES
VELOCITY
WIND TURBINES
WIND TURBINE DESIGN METHODS
WIND TURBINE CONTROL
WIND TURBINE SPEED REGULATION TURBINE
INDUCTION GENERATOR
SYNCHRONOUS GENERATOR
WIND FARM
POWER SYSTEM
RENEWABLE ENERGY
WIND ENERGY