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1、InterconnectionandTransmissionforWindGenerationWEATS2006August10,2006Boulder,ColoradoThomasA.Wind,PEWindUtilityConsultingJefferson,Iowa1TopicsIWillCover•Examplesofdistributedwindgenerationprojects•Howwindturbinesareinterconnectedtothedistributionsystem•Howdo
2、windturbinesaffectthedistributionsystem•ConnectingtotheSingle900kWWindTurbineTransmissionGridConnectedtoDistributionLineForWaverlyPower&Light2ExamplesofDistributedWindGeneration•SmallwindturbinesinWisconsin–Oneservingafarm–Onesimplyinterconnectedtoruraldistr
3、ibutionfeeder3Three35kWWindTurbinesNearLynd,Minnesota465kWWindTurbinePoweringaRadioStationatSiouxCity,Iowa565kWWindTurbineatBoondocksTruckStopnearWilliams,Iowa6HowAreSmallWindTurbinesInterconnected?•Typically,turbinesupto10kWareconnectedtocustomer’s120/240vo
4、ltserviceentrancepanelthroughaninverter.–Inverterneededbecausesmallwindturbinesaren’tconstantspeed•Turbinesfrom20kWto40kWareusuallyinductiongenerators,whichmaybesingleorthreephasefornetbillingapplications–Oneortwospeed,essentiallysynchronizedtoto240or480volt
5、service•Turbineslargerthan40kWarethree-phaseinductiongenerators,usuallytieddirectlyto480volt.NewBergey50kWunitwilluseaninverter.765kWWindTurbineNearLivingston,Montana3x25kVAThree65kWWindTurbinesatBritt,Iowa965kWWindTurbineforSentralSchoolsatFenton,Iowa10Sing
6、leLineDiagramofaLowVoltageInterconnectionInterconnectionofa50kWWindTurbineUsingSelfContainedProtectiveRelayingMeterMeter11NewBergey50kWWindTurbine•Latesttechnology•DesignedtobelessexpensiveperkW•22’longblades•Moreefficientinlowwindspeeds•Verysimpledesign–thr
7、eemovingparts•UsesslightlymodifiedABBvariablespeedmotorcontrollerasinverterinterfaceto480v.electricservice12MidsizeWindTurbines(100-250kW)13225kWatLacQuiParleSchoolinMinnesota225kWWindTurbinePoweringWasteWaterTreatmentPlantatNevada,Iowa14HowAreMidsizeWindTur
8、binesInterconnected?•Iftheturbineisclosetoacustomer’sloadcenter,thentheturbinecanbeconnectedtocustomer’s240/480voltmainservicepanel–Thisallowseasynettingofloadandgeneration•Turbinemayhaveastepup
