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1、WindPowerCollegeofInformationandElectricalEngineeringLinQiMaPowerPrinciplesAirflowwindmillspinningactionthroughtheshaft,therotor(drivenbyafantoforceaircomponent)oftherotarypowertransmittedtothegeneratortoproduceelectricityEconomyInrecentyears,generallyspeaking,theuseofwindtogenerateel
2、ectricityhasreducedthecostofmany,evenwithoutotherexternalcosts,manysuitablelocationsinthecostofwindpowergenerationhasbeenlowerthantheinternalcombustionenginefuel.Since2004,windpowerhasbecomethecheapestinthenewenergyofall.In2005,thecostofwindenergyhasbeenreducedtoone-fifthofthe1990s,an
3、dwiththeuseofhigh-wattagegeneratorswillcontinuedownwardtrend.Globalwindpowercapacityin2007grew24percentto59.1millionkilowatts.Morethan10yearsago,lessthan5millionkilowattsup12times.Windistheworld'sfastestgrowingenergy.Overthepast10yearstheaverageannualgrowthisrateof29%.Bycontrast,thesa
4、meperiodgrewby2.5%peryearcoal,nuclearpower1.8percent,2.5percentnaturalgas,oil,electricitygenerationincreasedby1.7%.?developmentofeconomiccompetitivenessandpotential ?landandecologicaldamageonthelower. ?airpollutionandlesscarbonemissionsandotherenvironmentalcostsarelow. ?windpowercanbe
5、distributedgeneration,powergenerationfacilitiesisnottoolargeconcentrationofriskAdvantagesofwindpowerDisadvantageofwindpower?Windpowergenerationintheecologicalproblemislikelytointerferewithbirds.Thecurrentsolutionistoshorepower.offshorepowergenerationefficiencyishigh,buthigherprices. ?
6、Insomeareas,theeconomicsofwindpowerhasshortage,therearemanyareasofintermittentwind ?requiresalotoflandtobuildwindfarms ?windturbinenoisewillbeahugeissueGridFeatureSmallwindfarmandthemainnetworkmayleadtodeclineinthequalityofpowerinsomeareas,suchasharmonics,flicker,voltageandreactivepow
7、ermanagementmoredifficult.Therearetwowaystosolvetheseproblems:1,Fansandcontroltechnologytoimprove2,thestrengtheningofthelocalnetwork,configuretheappropriatereactivepowercompensationorvoltageregulationequipment.Medium-sizedwindfarm(50MWormore)andsmallwindpowerisdifferentfromthatingener
8、althe
