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                Researchoncapacitycomputationofcascadeon - stream integralpumpedstoragehydropower
                     plants Ⅱ:multi - scalenestingmodelforcapacitycomputationandspecificexample

                                                                 1
                                  1
                                                  1
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                                                                                1
                         GUOAijun,CHANGJianxia,WANGYimin,WANGXuebin,SUNXiaoqiang
                  (1.Xi’anUniversityofTechnology,StateKeyLaboratoryBaseofEco - hydraulicEngineeringinAridArea,Xi’an 710048,China;
                                  2.NorthwestBranchofStateGridCorporationofChina,Xi’an 710049,China)
                  Abstract:Energystoragepowerstationstypifiedbypumpedstoragehydropower(PSH)stationbuildinguponhydro
                  powerbaseplayspivotalroleinimprovingpeakshavingcapacityofpowersystemandpromotingthewindpowerand
                  photovoltaicpoweraccommodationcapacity.Thisstudyproposesamulti - scalenestingmodelforcapacityplanning
                  whichcouplingshort - termpeakshavingmodelofPSHstationandcascadehydropowerstations,andlong - termop
                  erationmodelofcascadehydropowerstationsformultipurposeuse.Moreover ,giventhehighdimensionalityofthe
                  multi - scalenestingmodel ,weproposeamethodbasedonthesurrogatemodel.TheplannedcascadePSHstations
                  intheYellowRiverBasinareselectedascasestudy.WesuggestthreedevelopmentmodesofPSHstations,i.e.in
                  dividualdevelopmentmode ,cascadedevelopmnentmodeandintegrateddevelopmentmode.Sequentially,this
                  studyrecommendstheinstalledcapacityunderthethreedevclopmentmodesandcomputesthepeakshayingbenefits
                  throughpumpingoperation.Furthermore ,wederivethetheoreticalformuladescribingtheimpactofpumpingtime
                  andtransformefficiencybetweenpowergenerationandconsumptionontheinstalledcapacityofPSHstation.Relat
                  edresultsareshownasfollows :wesuggestadoptingthecombinationofpumpunitsandreversibleunitsorpumpu
                  nitsandenlargementofLongyangxiahydropowerplanttodevelopLongyangxia - LaxiwaPSHstation.Underindivid
                                                                                                4
                  ualdevelopmentmode , thecapacityofLongyangxia -LaxiwaPSH station issuggested 160×10 kW.In
                  comparison,whileitisdevelopedtogetherwithLaxiwa - NinaPSHstation,theLongyangxia - LaxiwaPSHstationis
                               4
                  suggested205 × 10 kW.TheinstalledcapacityofPSHstationcanincreasewiththereductionofdesignedpumping
                  time.Inthiscontext ,thepeakshavingabilityofPSH stationincrease,however,thepeakshavingbenefitby
                  pumpingremainsunchanged.TheinstalledcapacityofLaxiwa - Nina ,Lijiaxia - Zhiganglaka,Gongboxia - Suzhi
                                                4
                                     4
                                                          4
                  plantaresuggested75 × 10 kW,16 × 10 kW,59 × 10 kW respectively.Thesedevelopedplantscanincreasecon
                                           8
                  sumptionofnewenergy87.42 × 10 kWhperyear.
                  Keywords:cascadepumpedstoragehydropowerplants;capacityplanningmodel;multi - scalenestedscheduling;
                  YellowRiverBasin
                                                                                    (责任编辑:耿庆斋)















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