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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