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indicatorsforeach scenarioisquantitativelyestimated.Risk matrixlevelsaredefined consideringboth the
frequencyofoccurrenceandseverityoflossesofriskscenarios.BycombiningtheAsLowAsReasonablyPractica
ble (ALARP)criterion,theacceptablelevelofriskisclearlydefined,andnon - engineeringmeasuresareproposed
tocontrolrisks.ThisprovidesatheoreticalbasisforriskassessmentandpreventionoftheHWWDP.Thestudy
foundthat:(1)Onlyoptimizationschedulingamongthethreeschedulingmodescanmeetthewatersupplytargetof
15billioncubicmeterswitha95% assurancerate,andthewatersupplycapacityisincreasedby13% comparedto
therandomschedulingmode.(2)Thewatersupplyriskofsingle - sourceriskscenariosgraduallydevelopstowardsa
long - termwatershortageprocess.Multi - sourceriskscenariosfacemorecomplexschedulingsituations ,andthe
watersupplyriskisinadangerousstateinalldimensions.(3)TheproportionofriskeventsintheALARPregion
exceeds60%.Risksrelatedtoengineeringaremostlysmallprobabilityhighconsequencerisks ,whichshouldbe
prioritizedforresolutionintheALARPregionandpreventionintheunacceptableregion.(4)Emergencyplanssuch
asdownstreampersonnelevacuationareformulatedforlow - probabilitybuthigh - consequencewatersupplyriskstore
ducepotentialwatersupplylosses.Theresearchresultshaveapositivepromotingeffectontheriskmanagementofthe
HWWDP ,andstrengthentheapplicationvalueoftheALARPcriterioninriskassessmentofwatertransferprojects.
Keywords:watersupplyrisk;watertransferareaofHanjiang - to - WeiheWaterDiversionProject;riskscheduling
model;engineeringmanagementoperation;risklevelassessment
(责任编辑:耿庆斋)
(上接第 1220页)
Short - term criticalpeak - shavingmodeofcascadehydropowerplantswith
on - stream integralpumpedstoragehydropowerplant
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GUOAijun,CHANGJianxia,WANGYimin,WANGXuebin,XIQiuyi,ZHENGYongheng 2
(1.Xi’anUniversityofTechnology,StateKeyLaboratoryBaseofEco - hydraulicEngineeringinAridArea,Xi’an 710048,China;
2.StateGridShaanxiElectricPowerCompanyLimited,Xi’an 710004,China)
Abstract:Relyingonexistingcascadedhydropowerstationstoconstructanon - stream integralpumpedstorage
hydropowerplant (OIPSHP)notonlyenhancesthecleanandflexiblepeak - shavingcapacityofnewpowersys
tem,butalsocomplicatestheoperationmodeoforiginalcascadedhydropowerstations.Hence,itisurgentto
carryoutresearchonthejointpeak - shavingmodeofcascadedhydropowerstationsandOIPSHPs.Inthisarticle ,
theoperationcharacteristicsofOIPSHPandcascadedhydropowerstationsareanalyzed,andashort - termpeak -
shavingoptimizationmodelforcascadedhydropowerstationswithOIPSHPisestablishedfirstly.Secondly ,the
criticalcharacteristicsofday - scalejointpeak - shavingmodearefound ,andgeneralcalculationformulasforthe
criticalpeak - shavingflowofcascadedhydropowerstationsandthecriticalextractionflowofOIPSHParederived
andthecriticalpeak - shavingmodeofOIPSHParecondensed.Finally,thetheoreticalresultsareappliedtoone
practicalcase ,AnKangOIPSHPdependingoncascadeAnKangandXunyangreservoirs.Itisfoundthatthecriti
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calpeak - shavingflowoftheAnKanghydropowerstationis892m ?sunderratedhead.Iftheoutflowislessthan
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892m ?s,theOIPSHPwillfullyextractandinjecttomaximizepeakshaving.Oncetheoutflowexceeds892m ?
s,theOIPSHPcanswitchtooperateinconjunctionwithaconventionalhydropowerstationinasynchronized
manner,aswellasoperatesomepumped - storageunitsasconventionalhydropowerstationunits.Long - termdis
patchresultsshowthatoperatinginsyncwithconventionalhydropowerstationsincreasestheoperationhoursof
OIPSHPbutlowersthejointdispatchingentity ’speak - shavingbenefit.Ontheotherhand,switchingsomeOIP
SHPunitstooperateasconventionalhydropowerstationunitsconsumesAnKanghydropowerstation ’sgeneration
waterusagebutimprovesthejointdispatchingentity ’speak - shavingbenefit.Therefore,flexibleselectionof
OIPSHPoperationmodesshouldbeimplementedinactualdispatchingprocessesbasedontheoperationofpower
gridsandtheoperationmainbodyofhydropowerstationsandOIPSHP.
Keywords:criticalpeak - shavingmode;on - streamintegralpumpedstoragehydropowerplant;cascadehydro
powerplants
(责任编辑:耿庆斋)
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