600MW超临界锅炉给水控制系统研究及应用

上海交通大学硕士学位论文600MW超临界锅炉给水控制系统研究及应用姓名：胡武奇申请学位级别：硕士专业：动力机械及工程指导教师：忻建华20080201I600MW300600MW2×600MW600MW600MW#1200612258200722168#2200785168II,,,IIISTUDYANDAPPLICATIONOF600MWSUPERCRITICALBOILERFEEDWATERCONTROLSYSTEMABSTRACTItbecomesatrendthatthepowerstationprojectsgoforwardtohighparameterandlargecapacityinconsiderationofchina’sactualsituationandthedemandofthenationaleconomicdevelopment.Inthepastyearsthesuper-criticalunitwereappliedanddevelopedquickly.Chinaisnowonthebasisofmasteringthemanufactureofunder-critical300~600unitsquickeningthespeedtoresearchanddevelopsuper-criticalunitstorealizelocalizationandbatchmanufactureforincreasingtheratioofthesuper-criticalunitsinthefossiloperationsetsbythemeansoftechnologylicensetransferandcooperation.Atpresentthedomesticlarge-scalesuper-criticalunitshasfinishedtrialmanufactureandputintooperationandthecommercialmanufactureiscomingverysoon.Thecontrolofthesuper-criticalunitisthekeytechnologyofthesuper-criticalgenerationtechnology.Becauseofthestrongcouplingbetweenthesubsystems,thethermalstoragecapabilityofthekindunitssick,regularcontrolplancan’tnotgetgoodquality.Inordertoensurethesuper-criticalunitrunwell,theadvancedcontrolstrategymustbedeveloped.WiththeengineeringpracticeofthecontrolsystemdesignofFeixianpowerstation,thispapertalkedabouttheresearchandapplicationofcontrolstrategyofthefeedwatersysteminsuper-criticalunit.Thispaperanalyzedthefeedwatersystemcontrolstrategy,italsopresentedthe600MWsuper-criticalunit’senthalpymeasuremethodandenthalpy’ssettingvalueandsoon.Andcofiguratethefeedwatercontrolsystembasedonintermediatepoint’senthalpyIVadjust.Thesystemincludesthefeedwaterflowcontrolloop,feedwater,commandformationloopandcontrolsystemsofotherassistantloops.600MWsuper-criticalunitoneofFeixianpowerplantwasfirstgrid-connectedgeneratingelectricityat8:00,December25h,2006andfinishedthe168hours’trialrunningonthemorningofFeb2nd,2007.Andunit2finishedthe168hours’trialrunningonthemorningofAug5th,2007.Thispapercanprovideareferenceforthedesignofthefeedwatercontrolsystemofsuper-criticalunit.KeyWords:super-criticalonce-throughboiler,feedwatercontrolintermediatepoint’senthalpy,configurationVWηMRWJgHfPTBMCRhgrTMCRhgsDEBTs1MFTCRTECORB20083182008318200831811.120066.2220077[1]190%200677.82%[2]30-601030%72006366/50-60/[3]863600MW1000MW1025%42010622400~50022.1MPa27MPa9026022600MW20028200412——172006112812430ABBGEFOXBORO1.21919192330603[4]2600MW19922300MW2300MW2500MW2500MW2800MW600MW[5]500MW500MW[6]600MW[7]900MW900MW4[8]600MW600MW[9]1900t/hLagrange[10]600MW5[11]LAPWS-97[12]~[13]600MW[14]500MWSTAR-90500MW500MW[15]600MW123435%50%75%100%660ABBGEFOXBORO2006DCSEDPF-NTDCS600MW600MW200642007811901.3600MW2x600MW7FOXBOROI/ASeries2600MW200612258271.482.12.1.122.115MPa2425MPa(22.115MPa374)10KW2006366g/(KW/h)5060g/(kW/h)25%[3]2.1.222.115MPa374.1523.5MPa53829MPa5602.12.1Table2.1Thenetefficiencyandnetcoalsumptionofthesubcriticalsupercriticalultra-supercriticalunit/%/g(kwh)-1373817MPa,53833034024MPa,53830MPa,56640414445310320290300191919231957Philo31MPa538125MW9Eddystone34.4MPa566325MW24.1MPa53817070%1300MW607050196325MPa570300MW300MW1985186800kW1200MW23.5MPa540[16]600MW196719691971600MW7080450MW50%1000MW24.1MPa538566[17]2.1.3801000MW600MW199119922300MW2500MW2500MW2800MW480kW900MW168600MW42%300g/(kW/h)[18]1999/1011998119199959774h20004(2600MW)600MW(863)600MW43%45%2.22.2.12-112.1Fig.2.1Theworkingprincipleofonce-throughboiler1.112.3.20%30%4.100%5.6.2.2.222.129MPa374122.2WD2.2Fig.2.2Theprocessofwaterbecomingsteamofsupercriticalonce-throughboiler1.2.20W(hgrhgs)MQar,netηgl2-1WhgrhgsMηglQar,netgrar,netglgsMh=Qh+hW2-2'''''grar,netglgs'Mh=Qh+hW2-32-22-3MW=''MW2.13M2.2.32.32.3Fig.2.3ThedynamicCharacteristicofsupercriticalunit1.2.3a1)2)3)(a)(b)(c)144)2.2.3b1)2)3)4)3.2.3c1)2)3)4)2.32.3.115HTPT3WWJMJTHWHMTWTMJTPMHG0GWT=0GGWPM00G2-42.3.22.2DMWPTTslTMWWJTTssssPMPWPTWTslTMTWTWTJTMTWTWTGGGPMT=GGGWWTGGG2-51.2.3.164.5.2.3.3[32]DEBDEBDEB1.DEB2.3.172.12.1Table2.1Comparisonofcontrolsystembetweensupercriticalonce-throughboileranddrumboilerMWMW2.3.42.4///1)2)3)184)2.4Fig.2.4Theinputandoutputofthesupercriticalunit2.42.4.11)2)3)192.4.235%BMCR22.520HPILP1232.5Fig.2.5Thesteam-watersystemofonce-throughboiler2.4.32.635%BMCR35%BMCR1.11.315.421Kf(x)dtdf(x)Kdtdf(x)f(x)Kdtd2.6Fig.2.6Theprincipleoffeedwatercontrolsystem2.1)222)ABAB3)ABf(x)PIDPID21ABAB4)5)6);2301002.5I/ASeries20704CCRTDCSDCSDCSDCSDCSDCSISOOSIOSI1980MAPMAPOSIOSIFoxboroMAP1987MAPDCSI/ASeriesI/ASeriesOSIOSII/ASeries1992FoxboroSunSPARC501996WindowsNTI/ASeries1997MicroI/AFoxboro1988I/ASeries9015024I/ASeries120I/ASeriesABC,I/A2.5.1I/ASeriesI/ASeriesEthernet2.5.2I/ASeriesI/ASeriesISOOSIIEEEI/ASeriesBROADBANDLAN(CARRIERBANDLAN)(NODEBUS)(FIELDBUS)MAPCPNODEBUSEthernetIEEE802.310Mb/s64CPI/O(FIELDBUS)IEEE1118268.75Kb/s2464I/ASeries(CP)I/OCPI/OCPI/OCP2-7I/ASeries[24]25IFIFIFIFPCPC2.7I/ASeriesFig.2.7ThenetstructureofI/ASeriessystem2.5.3I/ASeriesI/ASeries/Client/ServerOSII/ASeries1234567I/ASeriesCP26BlockBlockCompoundCompoundBlockCompoundI