Thesis - Secure Provision of Reactive Power Ancillary Se (1)

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1、SecureProvisionofReactivePowerAncillaryServicesinCompetitiveElectricityMarketsbyIsmaelEl-SamahyAthesispresentedtotheUniversityofWaterlooinfulfillmentofthethesisrequirementforthedegreeofDoctorofPhilosophyinElectricalandComputerEngineeringWaterloo,Ontario,Canada,2008©IsmaelEl-Samahy,2008Iherebydeclare

2、thatIamthesoleauthorofthisthesis.Thisisatruecopyofthethesis,includinganyrequiredfinalrevisions,asacceptedbymyexaminers.Iunderstandthatmythesismaybemadeelectronicallyavailabletothepublic.iiAbstractTheresearchworkpresentedinthisthesisdiscussesvariouscomplexissuesassociatedwithreactivepowermanagementan

3、dpricinginthecontextofnewoperatingparadigmsinderegulatedpowersystems,proposingappropriatepolicysolutions.Anintegratedtwo-levelframeworkforreactivepowermanagementissetforth,whichisbothsuitableforacompetitivemarketandensuresasecureandreliableoperationoftheassociatedpowersystem.Theframeworkisgenericinn

4、atureandcanbeadoptedforanyelectricitymarketstructure.Theproposedhierarchicalreactivepowermarketstructurecomprisestwostages:procurementofreactivepowerresourcesonaseasonalbasis,andreal-timereactivepowerdispatch.Themainobjectiveoftheproposedframeworkistoprovideappropriatereactivepowersupportfromservice

5、providersatleastcost,whileensuringasecureoperationofthepowersystem.Theproposedprocurementprocedureisbasedonatwo-stepoptimizationmodel.First,themarginalbenefitsofreactivepowersupplyfromeachprovider,withrespecttosystemsecurity,areobtainedbysolvingaloadability-maximizationproblemsubjecttotransmissionse

6、curityconstraintsimposedbyvoltageandthermallimits.Second,theselectedsetofgeneratorsisdeterminedbysolvinganoptimalpowerflow(OPF)-basedauction.Thisauctionmaximizesasocietaladvantagefunctioncomprisinggenerators'offersandtheircorrespondingmarginalbenefitswithrespecttosystemsecurity,andconsideringalltran

7、smissionsystemconstraints.Theproposedprocedureyieldstheselectedsetofgeneratorsandzonalpricecomponents,whichwouldformthebasisforseasonalcontractsbetweenthesystemoperatorandtheselectedreactivepowerservi