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当前位置:首页 > 商业/管理/HR > 经营企划 > 吴泾300MW机组汽轮机通流部分故障诊断研究
上海交通大学硕士学位论文吴泾300MW机组汽轮机通流部分故障诊断研究姓名:莫杰申请学位级别:硕士专业:动力工程指导教师:忻建华;吴敬强2005032820050328-III–300MW11-IV–-V–TheResearchofSteamTurbineFlowFaultsDiagnosisfor300MWUnitsofWujingPowerPlantAbstractPowergenerationcompanieshavebecomeindependenteconomicentitiesinthepowermarket.Recenttwoyears,thepriceofcoalhasraisedcontinuously,thoughthecostofgeneratingpowerisincreasing.Soitisespeciallyimportantforpowergenerationcompaniestokeepandimprovethesafetyandeconomyinpowergeneration.Steamturbinesystemistreatedasoneofthecriticalmodelsinapowerplant.Throughthediagnosisresearchandpracticesoftheturbineflowfaults,thispaperpaysemphasisonfollowingworks:First,thispaperintroducestheflowcharacteristicthatisincludingtherelationandvibrationofpressure,temperatureunderdifferentconditions.Aftertheanalysis,thevibrationtendenciesofthethermalparameterssuchasthepressureafterregulatingstage,thetemperatureofreheatedsteam,arealsoprovidedundertheconditionofflowfaultsintheregulatingstage,pressurestage,shaftglandandblade.Afterdiscussedandcomparedsomethermodynamiccriterionsforsteamturbineflowfaults,thepressureafterregulatingstageandtheequivalentflowareaaretakenasthecriterionstoidentifythenormalandabnormalvariationofthethermodynamicparameters.Modifiedmethodof-VI–themisalsodetermined.Practicalexamplesaregiventodemonstratetheeffectandaccuracyofthediagnosisbythethermodynamicparametervibration.AimedattheabnormaljammedfaultoftheregulatingstageofNo.11unitofWujingPowerPlant,theanalysisofphysicalparametersandthehierarchicalclassificationdiagnosismodelbasedonmembershipgradeandrule,hadbeenusedrespectivelyforfaultdiagnosis.Wegotasatisfiedconclusion.Thismethodcanexplainthereason,positionanddegreeoftheflowfaultinsteamturbine.Itisusefulforsavingtimeintheoverhaul.KEYWORDS:steamturbine,faultdiagnosis,flowsection,hierarchicalclassification71.190%8200MW[9]1400300MWWestinghouseN300-16.7/538/538B156-5B156-7500~600KJ/Kwh.1.2[9][10]91.2.1[11][12]1.2.2[13]-[17][30][34][38]1102341.2.31965[18][19][20]Y=X.RYXR1.2.4[21][26][29][32][35]111.2.5[27][28]1234121.3,1,,23300MW11131114“”2.11,,21532.22.2.12.2.21216342.3[1][6]2.3.1[40]171⎥⎥⎥⎦⎤⎢⎢⎢⎣⎡⎟⎟⎠⎞⎜⎜⎝⎛-⎟⎟⎠⎞⎜⎜⎝⎛-=+kkkPPPPPkkAG1122121112rm212P2/P1mGTPC11=222122G------KgsP1------MPaP2------MPar1------3KgmA------2mm------T1------KC------3221221zzPPGTGPPT-=-''''23GG'------KgsP11P'------MPa18Pz,'ZP------MPaTT'------K22232.3.222PP21/22222.3.32.3.422300MW538193.2959MPa540223.3020MPa0.1857%5303.2713MPa0.7463%2.42.4.120222.4.2300MW22222.4.332122232.4.4EPRI()2.15757550[7]10000223.13.1.11,,iiiiinoutriiiinshhhhh-=-(3-1),iinhiouthishi,,,,,,,,,,,,,,[5]232,,,,[5]iiiiinouteiiinouthheeh-=-(3-2),iinhiouthiiineioute3h-s,,,;,[5]3-1Fig3-1sketchmapfortheangleofexpansionlineinsteamturbine3-1,AB,qθθ24abhhw=-(3-3)basss=-(3-4)arctgwqs⎛⎞=⎜⎟⎝⎠(3-5),q90(s1000),,,q'q4(inPinViA(),,ininiiiiGfPVA=(3-6)(),,ininiiiiAfPVG=(3-7)iGinPinViiiniiniGPVj=(3-8)iGt/hiniP105PabariniVm3/kgiGijij“”ijij10%iA2550%ij15%iA100%“”()()[5]53.1.2126234527300MWDAS3.23.2.1DAS(DataAccessSystem)3-23-2Fig3-2TheRelationBetweenloadandthePressureatendoftheregulatingstageNMWpMPa283.2.2300MW93-13-11234567813.3423.544.1277.65137.92131.23321.751034.55Table3-1Theequalflowareaofno-regulatingstages16.7MPa538j10.5~11.0j8.85~8.89293.2.3tdocppPP×=3-4PPPPcodtcddrtr=××nnnn3-5Pc------MPaPo------MPaPt------MPaPd------MPand------mkg3vc------mkg3ntr------mkg3vdr------mkg3303.33.3.113-21()()+11.011.010.21.8-5.9%Table3-2thetrendofthethermodynamicparameter’schange3-211%313.3.22402-33-32-40-36%-42%-44%-1.8%-0.4%Table3-thetrendofthethermodynamicparameter’schange3-33.3.3321213-43-4332-17.2%-16.5%21.212.2Table3-4thetrendofthethermodynamicparameter’schangeafter3-421.2%17.2%3.4113.4.1111219911992N300—16.7538538WestinghouseB-156-5B-156-711927300MW()16.7Mpa538()12.0513MPa494.63.6598MPa320.9()3.2935MPa5380.8048MPa337.5330.0049MPa926t/h761.771t/h3.4.21112003134300MW80687162050206MW2.50.051.00.052003344125284MW16.7MPa11.93MPa3.49MPa2200341211()414116296MW3417.3MPa12.8MPa513280MW20MW3.4.34/14#114/16#11#1~6#65MW20MW#65/1~2#114/123-5Tab3-5Thetestdatesbeforemodified3-43-63-535Tab3-6Thetestdatesaftermodified3-61.6%2.3%3.1%3-658~9512~133-43-73-53-33-43-71260MW2260MW3-6363240MW#6#635Fig3-4TheaverageoftheinternalefficiencywhileeachvalveopeningFig3-5Thecomparisonoftheefficiencies33-3Fig3-3Thepressureafterregulatingstageandloadafterthevavleopened3-43-5373-7Tab3-7Thecollectionoftheefficiencies0.8320.6980.769#1,0.6370.6950.764#2,0.6220.7470.780#3,0.6780.7130.780#5,0.6880.7110.784#6,0.7090.7080.7933.4.4#113-6..3-6Fig3-6thecomparisonofthepressureoftheprimarysteambeforeandafteroverhaul#11512#1138#6353.4.552066216353-7Fig3-7thephotoofthenozzle300MW39300MW300MW300MW4.1300MW40nqqnnq4.24-141Fig4-1TheModelBasedonHierarchicalClassificationS0S01S02S0nS011S01PS0n1S0nq…………300MW41300MW42(1)(2)(3)(4)(5)4-2300MW434-3-4-3Fig4-3KnowledgeBaseStructure4-2Fig4-2HierarchicalClassificationTreeofTheFaultsinSteamTurbineFlowSection300MW44114.3114.3.14-34-4300MW45Fig4-4TheOrganizationStructureoftheModelBasedonHierarchicalClassification4-4300MW464.3.2(1)(2)(3)(4)Gaussian()()
本文标题:吴泾300MW机组汽轮机通流部分故障诊断研究
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