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1、5648IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.12,DECEMBER2013DesignandEvaluationofaNewConverterControlStrategyforNear-ShoreTidalTurbinesMahdaJ.Jahromi,Member,IEEE,AliI.Maswood,SeniorMember,IEEE,andKing-JetTseng,SeniorMember,IEEEAbstractWhileti

2、dalstreampatternsofnaturalchannelsarecomparedtootherrenewableresources.Consequently,devel-essentiallyconsistentandsmooth,coastaltidal?owsexperienceopmentofthisemergingtechnologypresentsunprecedentedmuchmoreradicalspeedvariations.Thispaperproposesanewo

3、pportunitiestoincreasepowerextractionandef?ciencythatconvertercontrolstrategyformaximumpowerextractionoftheareyettobeexplored.Thelunarsemidiurnaltide,withtwofast-changingcurrentsthataretypicallyseeninopenwatersandneartheshore.Theproposedmethodmakesuse

4、ofvariable-speedhighandtwolowwaterseachday,istheprincipalworldtide.generationandhastheabilitytoadapttothenatureofdifferentTheamountofdisplacedwaterinalunarcycleeachdayistidal?ows,thusenablingef?cientexploitationofresourcesthattremendous;however,ithapp

5、ensverygraduallyoveracourserequirefasterdynamicresponses.Themainmotivationbehindofseveralhours.Consequently,intheopenoceanwherethethisstudyhasbeentheexplorationofthepossibilityofcombinedwaterenjoysavastbasin,thetidalcurrentscausedbytheriseoffshorewind

6、tidalcogeneration.Theaspectsdiscussedinthispa-perincludeinterdependencesbetweentheinjectionofthe?uctu-andfallofwaterhavelowervelocities.Inadditiontothelunaratinggeneratedpower,grid-tieconnection,andmaximumpowertidesattheseso-callednear-shoreareas,stre

7、ampatternsarealsocapturewithaviewtoaddressingenergyconversionandpowerin?uencedbypropagationandre?ectionoftidalwaves.Asthequalityrequirements.Detailedinsightsintothisnovelpowergen-wavepropagatesintoshallowerwater,itswavespeeddecreases,erationsystemarep

8、rovidedwithacasestudythatinvolvesaandtheenergycontainedbetweencrestsiscompressedintomethodformaximumpowerpointtrackingandpowerinjectioncontrolsinanonstiffnetwork.bothasmallerdepthandashorterwavelength;thus,thetideheightandthetidalstreamstrengt