Page 99 - 2023年第54卷第10期
P. 99
Coordinationmethodofelectricitysupplyandrecipientmarketday - ahead
spotclearingconsideringhydropowerabsorption
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ZHANGYang,SHENJianjian,CHENGChuntian,ZHAOQihao,
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XIEMengfei,WANGBangcan 2
(1.InstituteofHydropower&Hydroinformatics,DalianUniversityofTechnology,Dalian 116024,China;
2.KunmingPowerExchangeCenter,Kunming 650011,China)
Abstract:Large - scalehydropowertransmissionacrossprovincesandregionsinvolvesmultipledifferentiatedelec
tricitymarketsatpower - supplyandrecipientprovincesorregions.Howtocoordinatedifferentmarkettransactions
topromotetheefficientintegrationofhydropowerisoneofkeyissuesintheconstructionofChina ’selectricityspot
market.Thispaperproposesacoordinationmethodofelectricitysupplyandrecipientmarketday - aheadspotclear
ingconsideringhydropowerabsorption.AniterativeclearingframeworkisdevelopedwithDClinesasthecoordina
tingfactortodecouplethepower - supplyandrecipientmarkets.Theboundaryconditionsofgenerationcapacity ,
start - upandshutdown,climbinganddailypowergenerationcapacityofgianthydropowerplantscanbeobtained
basedonthetransmissionschedules.Withcomplex,nonlinearityhydraulicconstraintsandspillagecontrolrequire
ments ,aclearingmodelwithanobjectiveofminimizingthetotalpowerpurchasecostduringthewholetimehorizon
isconstructedtooptimizetheday - aheadgenerationschedulesatthepower - supplymarket.Basedonthespillage
andpowersectioncontrolrequirements ,amethodforupdatinginter - provincialtransmissionscheduleboundariesis
constructedtodynamicallyadjusttheboundaryvalues.Theboundariesareintegratedintotheclearingmodelofthe
power - recipientmarket.Theiterationsarerequireduntilthealgorithm converges.Theproposedmethodwasvali
datedandanalyzedwithactualengineeringexamplesinYunnanProvinceandthemodifiedIEEE300 - bussystem.
Theresultsdemonstratethatthemethodcansolvetheday - aheadspotclearingofhigh - proportionhydropowermar
ketintensofminutes.Thetimelinessrequirementissatisfied.Moreover ,theday - aheadspotmarketclearingre
sultsandtransmissionschedulesarecoordinated.Thereservoirdischargeandpowergenerationofthecascadehy
dropowerplantsarealsomatchedcorrectly.
Keywords:spotmarket;high - proportionhydropowersystem;clearing;hydropowerabsorption;gianthydropowerplant
(责任编辑:于福亮)
(上接第 1220页)
Studyoncreeppropertyandreductioncoefficientofgeotextilesundertoppressure
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LIDan ,YIYang,LUOChen,WUDi,XUChao,WUJianjian 2
(1.DepartmentofGeotechnicalEngineering,TongjiUniversity,Shanghai 200092,China;
2.SchoolofArchitectureandTransportationEngineering,GuilinUniversityofElectronicTechnology,Guilin 541004,China)
Abstract:Thecreeppropertiesofroutinegeotextilesonlyconsiderthetensilestateofthereinforcement.Thestress
conditionsofgeotextilesaremorecomplexwiththewideapplication.Inordertostudythecreeppropertyofgeotextiles
undertoppressure ,atoppressurecreeptestapparatuswasdeveloped.TheCBRcircularpuncturetestofMirafiPET
1300geotextileand2400hourscirculartoppressurecreeptestsundertheloadlevelsof40%,50% and60% werecar
riedoutusingthisapparatus.Thetoppressurecreepreductioncoefficientsunderdifferentfailurestrainsanddifferent
designlivesof5years ,10years,60yearsand120yearswerecalculated,whichwerecomparedwiththeregularten
silecreepreductioncoefficients.Thequantitativerelationamongthecreepreductioncoefficient ,designlifeand
failurestrainwereestablishedtopredictthetoppressurecreepreductioncoefficient.Theresultsshowedthatthetop
pressurecreepreductioncoefficientwasgreaterthanthatofregulartensilecreepandtheimprovementrangewas
from65.340% to148.496%.Thecreepreductioncoefficienthadlittlechangewiththeincreaseofdesignlife.The
toppressurecreepreductioncoefficientkeptstablewiththeincreaseoftoppressureareastrainunderdifferentde
signlives.Toimprovethesafetyanddurabilityofengineeringstructures ,itissuggestedthatthetoppressurecreep
reductioncoefficientshouldbeusedinthedesignofthegeosyntheticsaffectedbytoppressure.
Keywords:geosynthetics;toppressurecreepproperty;creepreductioncoefficient;toppressurecreeptestap
paratus;quantitativerelation
(责任编辑:李 娜)
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