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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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