ABB - SVC - An insurance for improved grid system stability

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1、SVCStaticVarCompensatorAninsuranceforimprovedgridsystemstabilityandreliabilityIt’snotthepowerinthatcounts......it’sthepowerthatcomesout!IncreasedefficiencyinpowersystemsDemandisrisingallthetimeandmodernsocietywouldTheSVCisasolid-statereactivepowercompensationdevicecease

2、tofunctionwithoutaccesstoelectricity.Asthevolumebasedonhighpowerthyristortechnology.ofpowertransmittedanddistributedincreases,sodotherequirementsforhighqualityandreliablesupply.AnSVCcanimprovepowersystemtransmissionanddistri-butionperformanceinanumberofways.Installingan

3、SVCAtthesametime,risingcostsandgrowingenvironmentalatoneormoresuitablepointsinthenetworkcanincreaseconcernsmaketheprocessofbuildingnewpowertrans-transfercapabilityandreducelosseswhilemaintainingamissionanddistributionlinesincreasinglycomplicatedandsmoothvoltageprofileun

4、derdifferentnetworkconditions.Thetime-consuming.Makingexistinglinesaswellasnewonesdynamicstabilityofthegridcanalsobeimproved,andactivemoreefficientandeconomical,thenbecomesacompellingpoweroscillationsmitigated.alternative.Bydevelopingefficientsemiconductors(thyristors)d

5、imen-Majorsavingsatreasonablecostsionedforhighpowerratings,ABBhascreatedtheperfectOptimumpowertransmissionanddistributionalsoentailstheenvironmentforreactivepowercompensation.Thistechnologyreductionoftransferlossesandprovisionofadequatepowerhasalsoprovedhighlyeffectivei

6、nHVDCapplicationsandqualityandavailabilityatthereceivingend.thyristordrivesforindustry.ThesevoltagesdemonstratepostfaultstabilizingeffectofanSVC.Voltage(kV)1850MW1750MW420SVC400380360SVC340320300NoSVC280260NoSVC0.1.2.3.4.5.6.7.8.91.01.11.21.3Time(sec.)Thesevoltagesdemon

7、stratepostfaultstabilizingeffectofanSVC.PowerTransformerTheABBstaticvarcompensatorincludesthefollowingmajorcomponents:ControlSystemThyristorValvesCapacitorBanksReactorsToobtainoverallcontrolofthereactivepowerinanetwork,thyristorcontrolledreactorsandthyristorswitchedcapa

8、citorsareoftencombinedwithmechanicallyswitchedshuntreactorsandcapacitors,controlledbytheSVC.2It’snotthepowerin