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Demonstration of Key Features ofFAST with AeroDyn & HydroDyn

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.

NREL Wind TurbineModeling Workshop

August 7, 2012

UMASS Amherst, MA

Jason Jonkman, Ph.D.Senior Engineer, NREL

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Wind Turbine Modeling Workshop 2 National Renewable Energy Laboratory

Input & Output Files

Linear(.dat)

ADAMS-Spec.(.dat)

Furling(.dat)

Platform(.dat)Primary

(.ipt)

Airfoil(s)(.dat)

Wind(.wnd,.bts)

FAST

Required Optional

TimeSeries

(.out)

PeriodicMatrices

(.lin)

ADAMS

Input Files(.acf,.adm)

AeroDyn

Excitation

Force (.3)

Added-mass and

Damping (.1)

Hydrostatic

Data (.hst)

Required WAMITOutput

Summary(.opt)

Element(.elm)

Summary(.fsm)

Primary(.fst)

Tower(.dat)

Blade(s)(.dat)

FAST-to-ADAMS

Preprocessor

Linearization

Time Simulation

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Wind Turbine Modeling Workshop 3 National Renewable Energy Laboratory

NREL 5-MW Baseline Wind Turbine

Fictitious, but representative,multi-MW wind turbine

Heavily influenced by theREpower 5M prototype &DOWEC project turbines

Specifications include: Blade structural &

aerodynamic properties

Nacelle & hub

Drivetrain

Tower

Control system:

Generator torque

Blade pitch

REpower 5M Wind Turbine

Summary of PropertiesRating 5 MW

Rotor Orientation, Configuration Upwind, 3 Blades

Control Variable Speed, Collective Pitch

Drivetrain High Speed, Multiple Stage Gearbox

Rotor Diameter 126 m

Hub Height 90 m

Cut-In, Rated, Cut-Out Wind Speed 3 m/s, 11.4 m/s, 25 m/s

Cut-In, Rated Rotor Speed 6.9 rpm, 12.1 rpm

Rated Tip Speed 80 m/s

Overhang, Shaft Tilt, Precone 5 m, 5, 2.5

Rotor Mass 110,000 kg

Nacelle Mass 240,000 kg

Tower Mass 347,460 kg

Coordinate Location of Overall CM (-0.2 m, 0.0 m, 64.0 m)

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Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute Battelle

Onshore, Steady Wind 8 m/s, No Control

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Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute Battelle

Onshore, Steady Wind 8 m/s

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Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute Battelle

Onshore, Steady Wind 18 m/s

5/19/2018 Demonstration Jonkman

7/12Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute Battelle

Onshore, Turbulent Wind 18 m/s

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8/12Wind Turbine Modeling Workshop 8 National Renewable Energy Laboratory

OC3-Hywind Spar Buoy

Developed within IEA Wind Task23 OC3 project

Statoil supplied data for 5-MW

Hywind conceptual design

OC3 adapted spar to support theNREL 5-MW turbine:

Rotor-nacelle assembly unchanged

Tower adapted to conform to spar

Overall mass, CM, & inertias made

consistent to Statoils Hywind

Mooring system simplified

Torque & pitch controller modified to:

Maintain positive aerodynamicdamping

Minimize rotor speed excursions OC3-Hywind Model

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Offshore, Steady Wind 8 m/s, Period Waves 2 m, 8 s

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10/12Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute Battelle

Offshore, Turbulent Wind 18 m/s, Irregular Waves 6 m, 10 s

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Offshore, Pitch Free Decay, No Aerodynamics, Still Water

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Questions?

Jason Jonkman, Ph.D.

+1 (303) 384 7026jason.jonkman@nrel.gov

NREL is a national laboratory of the U S Department of Energy Office of Energy Efficiency and Renewable Energy operated by the Alliance for Sustainable Energy LLC