Research ProposalPDF Available

[Job offer] Postdoc "Wind Turbine Generators Technology Screening and Industrial Maturity Mission" - University Paris-Saclay

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Abstract and Figures

Offshore wind is a very active industry in terms of technology, and it is recently exploring several innovations for the conversion of the mechanical energy (rotation of the blades) to the electrical conversion (rotation of the rotor in the stator of the electrical machine).
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Joboffer:Postdoctoralfellow
ProjectTitle:WindTurbineGeneratorsTechnologyScreeningandIndustrialMaturity
ResearchFields:Windenergy
Offertype:postdoctoralresearcher(shorttermcontract,12months)
Workplace:GeePs,CentraleSupelec,UniversityParis‐Saclay
HiringInstitution:CentraleSupelec,UniversityParis‐Saclay
HeadsoftheScientificProject:MattéoCAPALDO(TotalEnergies),ArsimAHMEDI(TotalEnergies),
LoïcQUEVAL(GeePs,CentraleSupelec,UniversitéParis‐Saclay)
Applicationdeadline:12/2022
JobStartingDate:assoonaspossible
Mission(scientificproject)
Offshorewindisaveryactiveindustryintermsoftechnology,anditisrecentlyexploringseveral
innovationsfortheconversionofthemechanicalenergy(rotationoftheblades)totheelectrical
conversion(rotationoftherotorinthestatoroftheelectricalmachine).
Generally,theaveragespecificpowerofoffshorewindturbinesremainsrelativelyconstantbetween
300W/m2and400W/m2,asthetechnologytargetsthehighwindspeedclass(IECI).Since2013,a
continuousincreaseindrivetrainconfigurationsusingpermanentmagnets(typeD‐PMandE‐PM)can
beobservedresultinginmarketsharesabove80%inthelasttwoyears(seeFigure1,right).Assuming
thatthisdominanceofpermanentmagnetdrivetrainswillpersist,JRC(2020)assumesanEUmarket
shareof 95% inits HDS scenario,followed by 68%and 44% basedon extrapolatinghistorical time
seriesortheuptakeofnewinnovationsinMDSandLDS,respectively.Latestindustryinnovationsin
drivetraindesignproposeanalternativetofault‐pronerollerbearingsbyreplacingthemwithflexible
conical journal bearings (‘FlexPad’ bearing, patent pending) capable to cope with main‐shaft
deflectionsduringrotation[SCHRO19].
Moreover, the German technology developer Adion Technologies proposesanewhybridgearbox
concept(firstpatenttobegrantedin2020)fornextgenerationwindturbines(upto20MW)coping
with the increased masses at these turbine ratings with a modulartwostagedistributedgearbox
[WATSO19]. At the very early stage (TRL 1‐2) concepts of tip‐rotors would offer the possibility to
replacegearboxandgeneratorbyafast‐rotatingrotor/generatorlocatedatthetipofeachblade.As
thisconcepttargetsweightandcostreductionitmightbeespeciallyinterestingforverylarge offshore
rotors.
Figure1:Evolutionofrotordiameterofoffshorewindturbines(left)andannualmarketshareofinstalledcapacitybytrain
configuration(right)intheEU28[JRC2019c].
Inthiscontext,itisnecessarytounderstandproandconsofeachofthosesolutionstohaveadirect
impactintermsoflevelizedcostofenergy(LCOE)forwindfarmsdevelopments.
Thelimitations and technologydevelopmentsontheelectricalsideincluding the generator
andconvertercombinationwillhavetobeconsideredaswell[YARAM2015].
Theobjectiveofthisprojectistoclarifythereasonsofthedifferenttechnologydevelopmentsmade
bywindturbinemanufacturesandtounderstandtheirimpactofthemanufacturing,supplychainand
tothefinalcostofthewindfarm.Todothat,asimplemodelcanbedevelopwiththepossibilityto
adapt it to the different technologies thanks to the definition of a set of input parameters and
boundaryconditions.
References
[JRC2019b]WindEnergyTechnologyMarketReport.Luxemburg:EuropeanCommission,2019b.
EUR29922EN.
[SCHRO19]SchröderT,JacobsG,RolinkAandBosseD:“FlexPad”‐Innovativeconicalslidingbearing
for the main shaft of wind turbines. Journal of Physics: Conference Series 1222 (012026).
DOI:10.1088/1742‐6596/1222/1/012026
[WATSO19] Watson S, et al.: Future emerging technologies in the wind power sector: A European
perspective. Renewable and Sustainable Energy Reviews 113 (109270).
DOI:10.1016/j.rser.2019.109270
[YARAM2015]V. Yaramasu, B.Wu,P. C. Sen,S. Kouro andM. Narimani, "High‐powerwind energy
conversionsystems:State‐of‐the‐artandemergingtechnologies,"inProceedingsoftheIEEE,vol.103,
no.5,pp.740‐788,May2015.DOI:10.1109/JPROC.2014.2378692.
Environment
TheworkwilltakeplaceatthelaboratoryGeePs(GroupofElectricalEngineeringParis)and
UniversitéParis‐Saclay(ranked13thworldwideand1stincontinentalEuropeintheAcademic
RankingofWorldUniversities),inParis’region.
Requiredprofile
The candidate should hold or is about to complete a PhD in electricalorenergyengineering.An
experience in techno‐economic analyses would be appreciated. The candidate has good oral and
writtencommunicationskillsinEnglish.Prospectivecandidatesneedtocontacttheresearchteam,
withtheirCV,tofurtherdiscussaboutthesubject.
Howtoapply?
Pleasesendthefollowingdocumentsbyemailto:matteo.capaldo@totalenergies.com,withcopyto
loic.queval@centralesupelec.fr.
CVandacoverlettershowingyourinterest
Anexhaustivelistofyourworks:scientificpublications,patentsandothersscientific
productions
Referencelettersarenotrequestedbutcandidatesareaskedtoprovidethenameand
contactofonereferencewhomitmaycontactatalaterdate.
AnEnglishabstractofPhDwork(2pagesmax.)
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