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Researchoncapacitycomputationofcascadeon - stream integralpumpedstoragehydropower
plants Ⅰ:short - term peakshavingandgainofcascadedevelopment
1
1
1
1
2
GUOAijun,CHANGJianxia,WANGYimin,WANGXuebin,SUNXiaoqiang
(1.Xi’anUniversityofTechnology,StateKeyLaboratoryBaseofEco - hydraulicEngineeringinAridArea,Xi’an 710048,China;
2.NorthwestBranchofStateGridCorporationofChina,Xi’an 710049,China)
Abstract:On - stream integralpumpedstoragehydropower(PSH)buildinguponconventionalcascadehydropower
stationsbecomesanimportantwaytopromptpeakregulationcapacityofpowersystem.Theenergystoragepowersta
tionaddstheflexibilityofthehydropowerbasebyitspumpingandgeneratingoperation,andchangestheoperation
modeoforiginalcascadehydropowerstations,soitisurgenttodisclosetheoperationruleofPSHanditsimpacton
thecascadehydropowerstations.Inthisstudy ,twoplannedPSHstations,Longyangxia - LaxiwaandLaxiwa - Nina,
locatedintheupperYellowRiverBasinaretakenasexamples.Anoptimalshort - termpeakshavingmodelofPSH
stationsandcascadehydropowerstationsisconstructedtoanalyzetheimpactofPSH operationonhydropowersta
tions ,anddisclosethecriticalphenomenonofpeakshavingofPSHoperationthroughtheoreticalanalysismethodand
numericalmethod.Themainconclusionsareasfollows :(i)ThestoredenergybythePSHstationisconvertedinto
thehydropowerbythehydropowerstationunitswhichincreasesthepowerofhydropowerstationandinducesthede
creaseoftheup - spinningreserve;(ii)ThelowerfulltrafficofLongyangxiahydropowerstation,thelessregulating
storageofLaxiwareservoirandthelargerwaterquantityformultipurposewatersupplyarethekeyfactorsindecrea
singthepeakshavingeffectofPSHstation.Thecriticalpointofwatersupplyflowformultipurposeuseisdisclosed
andrelatedformulaisderived;(iii)Thephenomenonofcascadepumpingpeakshavinggainembeddedincascade
PSHstationsdevelopmentmodeincomparisonwiththesingledevelopmentmodeisfoundandquantified ,revealingthe
inherentprincipleofriverfunctionregeneratinginverselyinsuccessionundercascadePSHstationsdevelopmentmode.
Keywords:cascadeon - streamintegralpumpedstoragehydropowerplants;criticalfeatureofpeakshaving;gain
incascadepumpedstoragehydropowerplantsdevelopment ;YellowRiverBasin
(责任编辑:耿庆斋)
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