Book of abstracts 9th PhD Seminar on Wind Energy in Europe September 18-20, 2013 Uppsala University Campus Gotland, Sweden Campus Gotland WIND ENERGY Book of abstracts of 9th PhD Seminar on Wind Energy in Europe Uppsala University Campus Gotland, Sweden Campus Gotland, Wind Energy 621 67 Visby PREFACE The wind energy field is becoming more and more important in relation with future challenges of switching the world energy system to renewables. Therefore it is of high importance that tomorrow’s researchers in the field from all over the word meet and discuss future challenges. The 9th annual EAWE PhD seminar is in 2013 organized by Uppsala University Campus Gotland. This is a very suitable place for this event since it combines a unique historical environment with a sustainable profile and a long tradition of wind energy. Today about 45% of the energy consumption is locally produced by wind energy. Uppsala University Campus Gotland also has more than 10 years experience of teaching and research in the field with a focus on wind power project development. The aim with this seminar is to improve the international communication and information sharing of ongoing activities as well as simplify contact building between young researchers. It is also a perfect opportunity for PhD students to practice and improve their presentation and discussion skills. Associate Professor Stefan Ivanell Director, Wind Energy Uppsala University, Campus Gotland Book of abstracts of 9th PhD Seminar on Wind Energy in Europe September 18-20, 2013, Uppsala University Campus Gotland, Sweden TABLE OF CONTENTS ROTOR & WAKE AERODYNAMICS UNDERSTANDING THE WIND TURBINE BREAKDOWN MECHANISM WITH CFD M. Carrion (page10) A MULTI COMPONENT HOT-WIRE PROBE AND ITS APPLICATION AND FEASIBILITY IN WIND TURBINE WAKE MEASUREMENTS Pål Egil Eriksen (page11) IMPLEMENTATION OF ACTUATOR METHODS IN ANSYS-CFX B.M.C. Johnson (page12) EXPERIMENTAL ANALYSIS OF THE RE-ENERGISING PROCESS OF A WIND TURBINE WAKE L.E.M. Lignarolo (page13) LES OF THE LILLGRUND WIND FARM USING A TORQUE BASED POWER CONTROLLER K. Nilsson (page14) MODELLING OF A WIND TURBINE WAKE IN A UNIFORM, TURBULENT FLOW USING LES AND COMPARISON WITH WIND TUNNEL MEASUREMENTS H. Olivares-Espinosa (page15) A COUPLED WIND TURBINE MODEL AT DIFFERENT AERODYNAMICAL LEVELS H. Rahimi (page16) ADJOINT SOLVER FOR OPTIMIZATION OF WIND TURBINE AIRFOILS IN OPENFOAM® M. Schramm (page17) A SIMPLE NONLINEAR EDDY VISCOSITY MODEL APPLIED TO WIND TURBINE WAKES M.P. van der Laan (page18) VALIDATING OF A TRANSITION MODEL FOR THE DU91-W2-250 AIRFOIL Y. Zhang (page19) AERODYNAMIC LOADS AND AEROELASTICITY VORTEX METHOD APPLICATION FOR AERODYNAMIC LOADS ON ROTOR BLADES H. Abedi (page22) ACTIVE MICRO-TABS FOR WIND TURBINE LOAD CONTROL B. Bach (page23) ASSESSMENT OF FATIGUE LOAD REDUCTION OF HAWT USING SMART ROTORS L.O. Bernhammer (page24) EXTREME GUST LOADS FOR NOVEL WIND TURBINES R. Bos (page25) DESIGN OF A THIN AIRFOIL FOR DOWNWIND TURBINES T. Bracchi (page26) FLUID-STRUCTURE RESPONSE OF WIND TURBINE AIRFOIL TO GUSTS USING CFD T. Gillebaart (page27) AEROSTRUCTURAL OPTIMIZATION OF WIND TURBINES F. Gualdoni (page28) HIGHER-ORDER LIFTING-LINE THEORY FOR EQUAL FIDELITY AEROELASTIC ANALYSIS OF WIND TURBINE BLADES T. Hegberg (page29) ADVANCED-AERO-ELASTIC MODELING OF 2-BLADED WIND TURBINES USING MULTIBODY SIMULATION B. Luhmann (page30) LARGE-EDDY SIMULATION FOR WIND TURBINE FATIGUE LOAD CALCULATION IN FOREST REGIONS B. Nebenführ (page31) AERODYNAMIC DAMPING OF NONLINEARILY WIND-EXCITED ROTOR BLADES P. van der Male (page32) FATIGUE LOAD MONITORING OF WIND TURBINES IN A WIND FARM BASED ON STANDARD SIGNALS L. Vera-Tudela (page33) TURBULENCE, ABL & MEASUREMENTS QUALYFYING AN ON-SHORE MET-MAST FOR MEASURING OFF-SHORE WIND L.M. Bardal (page36) A STATISTICAL DESCRIPTION OF THE MEANDERING OF A WIND TURBINE WAKE IN HOMOGENEOUS TURBULENCE M. de Maré (page37) NEAR-SHORE WIND MEASUREMENTS WITH THE SPHERE ANEMOMETER AND STANDARD SENSORS IN WIND ENERGY H. Heißelmann (page38) DIGITAL HOLOGRAPHIC PARTICLE IMAGE VELOCIMETRY FOR 3D FLOW MEASUREMENTS C.Hesseling (page39) FAR SHORE ATMOSPHERIC CONDITIONS IN SCOPE OF WIND TURBINE DESIGN M. C. Holtslag (page40) FORCE DYNAMICS OF AIRFOIL SEGMENTS WITH ACTIVE FLOW CONTROL UNDER TURBULENT IN-FLOW CONDITIONS GENERATED WITH AN ACTIVE GRID G. Kampers (page41) CTRW 3D WIND FIELD AND ITS INFLUENCE ON FATIQUE F. Keshtova (page42) RECONSTRUCTING TURBULENCE COHERENT STRUCTURE AS SIMULATION INTITIAL CONDITION USING LARGE-EDDY SIMULATION VIRTUAL-FLIGHT- MEASUREMENT M. Kiaee (page43) A BAYESIAN MODEL OF WIND DIRECTION M. Burak Kılıç (page44) WIND PREDICTION ENHANCEMENT BY ENVIRONMENTAL PARAMETERS H. Macdonald (page45) TURBULENCE AND WAKE MEASUREMENTS AT WIND TRUBINES USING SEVERAL UNMANNED AERIAL VEHICLES AT ONE TIME C. Molter (page46) EXPERIMENTAL STEREO VISION STUDIES OF FLOW AND STRUCTURAL EFFECTS ON WIND TURBINES N. Najafi (page47) NEW APPROACH FOR HIGHLY RESOLVED MEASUREMENTS IN ATMOSPHERIC FLOWS J. Puczylowski (page48) TURBINE MODELING AND CONTROL THE INFLUENCE OF TIP SPEED RATIO VARIATIONS ON THE WAKE BEHIND TWO MODEL WIND TURBINES J. Bartl (page50) ELECTROMECHANICAL DRIVETRAIN SIMULATION J. Gallego-Calderon (page51) DATA-DRIVEN WIND FARM CONTROL P.M.O. Gebraad (page52) ADVANCED LIDAR-ASSISTED CONTROL OF WIND TURBINES Florian Haizman (page53) APPLYING COORDINATED CONTROL TO WIND TURBINES IN BLADED D. Hamilton (page54) ADAPTIVE DYNAMIC CONTROL OF A WIND GENERATOR P. Jaen Sola (page55) CONTROL OF A VARIABLE PITCH VERTICAL AXIS WIND TURBINE U. Jassmann (page56) POWER ADJUSTING CONTROLLER FOR A 2MW WIND TURBINE V. Kourkoulis (page57) EFFICIENT MODELLING OF FLOATING WIND TURBINES R. Lupton (page58) ITERATIVE LEARNING CONTROL FOR INDIVIDUAL BLADE PITCH S. T. Navalkar (page59) AEROSERVOELASTIC MODELLING AND ACTIVE CONTROL OF VERY LARGE WIND TURBINE BLADES FOR GUST LOAD ALLEVIATION Bing Feng Ng (page60) INVESTIGATION OF POSSIBLE APPLICATIONS FOR THE POWER ADJUSTING CONTROLLER S. Pennock (page61) ACTIVE STALL CONTROL OF HAWT . BLADE PLANFORM OPTIMIZATION INCLUDING STALL ACTUATION R. Pereira (page62) HYDRODYNAMIC AND AERODYNAMIC LOADS ALLEVIATION OF AN OFFSHORE WIND TURBINE BY ADAPTIVE CONTROL F. Perrone (page63) DESIGN AND EVALUATION OF A WIND SPEED ESTIMATOR FOR HUB HEIGHT AND SHEAR COMPONENTS E. Simley (page64) NONLINEAR POWER CONVERSION IN A WIND FARM B. Wahl (page65) INDIVIDUAL PITCH CONTROL FOR TWO-BLADED WIND TURBINES E. van Solingen (page66) TURBINE OPERATION, PERFORMANCE AND MAINTENANCE A CASE STUDY OF SURFACE ROUGHNESS EFFECT IN BOUNDARY LAYER FLOWS Saygın Ayabakan (page68) SELECTING THE MOST USEFUL SENSORS TO INCREASE THE AVAILABILITY OF OFFSHORE WIND FARMS C.G.F. Boussion( page69) DRIVETRAIN AVAILABILITY AND O&M COSTS IN OFFSHORE WIND TURBINES J. Carroll (page70) ESTIMATION OF THE POWER ELECTRONICS LIFETIME FOR A WIND TURBINE K.Givaki (page71) PERMANENT MAGNET SYNCHRONOUS GENERATOR FAULT IDENTIFICATION USING STATOR CURRENT ANALYSIS J. Härsjö (page72) DESIGN OF THICK WIND TURBINE AIRFOILS Hrgovan (page73) POWER CURVE MEASUREMENTS OF LOCALLY MANUFACTURED SMALL WIND TURBINES PART II Jon Leary (page74) DEVELOPMENT AND APPLICATION OF A DESIGN AND SIMULATION TOOL FOR VERTICAL AND HORIZONTAL AXIS WIND TURBINES D. Marten (page75) A STUDY OF CURRENT MAINTENANCE CHALLENGES IN A LARGE OFFSHORE WIND FARM – A CASE STUDY K. R. Petersen (page76) OFFSHORE WINDFARM SHIPPING AND LOGISTICS – THE DANISH ANHOLT OFFSHORE WINDFARM AS A CASE STUDY T. Poulsen (page77) USING LEARNABLE MULTI-AGENT-SYSTEMS FOR OPTIMAL O&M DECISION MAKING SUPPORT OF WIND TURBINES K. Rafik (page78) EXTENSION OF THE PROPORTIONALITY METHOD APPROACH FOR STRUCTURAL HEALTH MONITORING OF WIND TURBINE ROTOR BLADES S. Tsiapoki (page79) OPTIMIZATION OF ROTOR BLADES USING ADJOINT METHODS IN OPENFOAM L. Vorspel (page80) MICROSCALE, MESOSCALE AND ENERGY TERRAIN FITTED TURBULENT FLOW SOLUTIONS COUPLED WITH A MESOSCALE WEATHER PREDICTION MODEL G.Ahmet (page82) IMPROVING WRF-BASED MESOSCALE PREDICTIONS FOR SITE ASSESSMENT A. Singh (page83) EVALUATION OF A MESO-MICROSCALE APPLICATION OVER COMPLEX TERRAIN FOR WIND FARM SITTING C. Stathopoulos (page84) ENGINEERING AND ENERGY YIELD: THE MISSING DIMENSION OF WIND TURBINE ASSESSMENT D. Sturge (page85) TURBINE STRUCTURE & MATERIAL FSI ON WIND TURBINE BLADES USING OPENFOAM B. Dose (page88) NURBS-BASED PARAMETRIC MODELLING OF WIND TURBINE BLADES E. A. Ferede (page89) ULTIMATE STRENGTH OF WIND TURBINE BLADE STRUCTURES UNDER MULTI AXIAL LOADING P. Haselbach (page90) PROBABILISTIC DESIGN OF EXTREME LOADS ACTING ON THE FOUNDATION PILES OF A JACKET DURING AN 1-YEAR STORM K. Kelma (page91) CONCEPTUAL DESIGN OF FLOATING WIND TURBINES F. Sandner (page92) POWER SYSTEMS LOSS-OF-MAINS PROTECTION IMMUNE TO FAST SYSTEM DYNAMICS A. Giles (page94) POSSIBLE POWER OF OFFSHORE WIND POWER PLANTS (POSSPOW) T. Göçmen Bozkurt (page95) ELECTROMECHANICAL INTEGRATION AND OPTIMIZATION OF DIRECT DRIVE GENERATORS FOR 10-20MW WIND TURBINES D. Liu (page96) SELF-ORGANIZED SYNCHRONIZATION AND VOLTAGE STABILITY IN NETWORKS OF SYNCHRONOUS MACHINES K. Schmietendorf (page97) OTHER OPTIMAL DESIGN OF WIND-SOLAR AUTONOMOUS SYSTEMS WITH STORAGE E. Corr (page100) WINDBENCH: BENCHMARKING OF WIND FARM FLOW MODELS P. Gancarski (page101) DAMPING OF WIND TURBINE TOWER VIBRATIONS M. Laier-Brodersen (page102) VERTICAL AXIS WIND TURBINE DRIVETRAIN OPTIONS C. Warnock (page103) Book of abstracts of 9th PhD Seminar on Wind Energy in Europe September 18-20, 2013, Uppsala University Campus Gotland, Sweden ROTOR & WAKE AERODYNAMICS 9 9th PhD Seminar on Wind Energy in Europe 18-20 September 2013,