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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,coastaltidalflowsexperienceopmentofthisemergingtechnologypresentsunprecedentedmuchmoreradicalspeedvariations.Thispaperproposesanewo
3、pportunitiestoincreasepowerextractionandefficiencythatconvertercontrolstrategyformaximumpowerextractionoftheareyettobeexplored.Thelunarsemidiurnaltide,withtwofast-changingcurrentsthataretypicallyseeninopenwatersandneartheshore.Theproposedmethodmakesuse
4、ofvariable-speedhighandtwolowwaterseachday,istheprincipalworldtide.generationandhastheabilitytoadapttothenatureofdifferentTheamountofdisplacedwaterinalunarcycleeachdayistidalflows,thusenablingefficientexploitationofresourcesthattremendous;however,ithapp
5、ensverygraduallyoveracourserequirefasterdynamicresponses.Themainmotivationbehindofseveralhours.Consequently,intheopenoceanwherethethisstudyhasbeentheexplorationofthepossibilityofcombinedwaterenjoysavastbasin,thetidalcurrentscausedbytheriseoffshorewind
6、tidalcogeneration.Theaspectsdiscussedinthispa-perincludeinterdependencesbetweentheinjectionofthefluctu-andfallofwaterhavelowervelocities.Inadditiontothelunaratinggeneratedpower,grid-tieconnection,andmaximumpowertidesattheseso-callednear-shoreareas,stre
7、ampatternsarealsocapturewithaviewtoaddressingenergyconversionandpowerinfluencedbypropagationandreflectionoftidalwaves.Asthequalityrequirements.Detailedinsightsintothisnovelpowergen-wavepropagatesintoshallowerwater,itswavespeeddecreases,erationsystemarep
8、rovidedwithacasestudythatinvolvesaandtheenergycontainedbetweencrestsiscompressedintomethodformaximumpowerpointtrackingandpowerinjectioncontrolsinanonstiffnetwork.bothasmallerdepthandashorterwavelength;thus,thetideheightandthetidalstreamstrengt
