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500kV,,,,(530021):500kV,。:;;:TM406:B:1001-8425(2009)02-0010-051500kV,,。,,,500kV。500kV2,200738,5282010~5282055,45min,858.5MVA(750MVA),928.9A(824.8A),12.6%。500kV、、,。,,、,。,,。,500kV,、。2,,。,,,;,;,。,,,、RiskControlofOverloadOperationof500kVOil-ImmersedTypePowerTransformerRONGChun-yuan,CAOYu-wen,LIMao-feng,CHENFang-zhi,LUYing-jun(NanningBureau,CSGEHVPowerTransmissionCompany,Nanning530021,China)Abstract:Theriskandconditionofoverloadoperationof500kVoil-immersedtypepowertransformerareanalyzed.Themethodstoassesstheabilityofoverloadoperationoflargeoil-immersedtypetransformerinnormalperiodandfaultarepresented.Keywords:Transformer;Overloadoperation;Riskcontrol46220092TRANSFORMERVol.46FebruaryNo.22009、、500kV2,。。,,。,,,1.5h,,5min~10min。,,。《》(《》),,,,1[1]。3,。《》ON()、OF()OD()。4,,60%、80%、100%ONAN()、ONAF()OFAF(),ODAF(),OFAF。,,,OFAF,ODAF,OFAF,OFAF。OFAF,:θh=θa+Δθbr1+RK21+R x+2×[Δθimr-Δθbr]Ky+HgrKy(1)θh———,℃θa———,℃Δθbr———,KR———K———Δθimr———,Kx———y———Hgr———,,x=1.0,y=1.6。,,,(1),:θ′h=θh+0.15×(θh-θhr)(K>1)(2)θhr———,℃,,,,,t:Δθbt=θbi+(θbu-θbt)(1-e-t蛐τ0)(3)Δθbt———t,KΔθbi———,KΔθbu———t,Kτ0———(3)(1)(2)。,,。《》20℃,98℃,1,,6K,1,:V=θh98℃=2(θh-98)蛐6(4),,,:L=1tt2t1乙VdtL=1NNn=1ΣV(5)1()1.31.31.5蛐℃120130160蛐℃105115115Table1Currentandtemperaturelimitduringoverload11464《》,(2),(1,24h),ON、OFOD、,,。,,,《》。2,500kV蛐750MVA,OFAF。40℃,80%,1.160.5h(2)。5《》:,,。,、,,。2(A),3(3),32.1K,13.9K,28.2K,7.8K,,K1,3(1)2(A)58K,20℃,78℃,20K。ONANONAFOFAFODAFx0.91.01.0y1.61.62.0R666H1.31.31.3τ0蛐h2.51.51.5θ蛐℃202020Δθhr蛐K787878Δθwr蛐K636368Hgr蛐K262229Δθimr蛐K434646Δθir蛐K525649Δθbr蛐K3436432Table2ParametersofgeneralthermalcharacteristicsoftransformerK2K1t024蛐h1Fig.1Twoclassequivalentrectangularloadperioddiagramoftransformer0.80.91.01.11.21.31.41.51.60.20.30.40.50.60.70.80.91.0θa=40℃0.5h1h2h4h8h24hK2K1240℃OFFig.2LoadconditionofnormallifelossofOFlargepowertransformerat40℃3Δθimr蛐K4632.1θbr蛐K3628.2θhr蛐K7858R65.33Hgr蛐K2222Table3Thermalcharacteristicparametersoftransformer12、、500kV2。,,,,,。、1120℃、,(1)、(2)(3),。2(A),40℃,80%,,θh120℃(1),3(1)K1.21,,24h11,(4)1.211.67h。(4),4.3%。66.1《》,,,。,,。,,1.3,130℃(1)。,,,。,,,,。1.5,160℃(1)。,130℃。,,(1)、(2)(3)。2(A),40℃,80%,130℃(1),3(1),1.3。24h11,,(4)1.30.52h,0.52h,,,130℃。,,1.3,130℃,0.5h,。6.2、、,,,,。,,。(1),,,。(2),,。4蛐℃40400.80.81.161.21蛐h0.51.67Table4Normalperiodicloadsoftransformer(18)13465Fig.5Inquiryresults、。、,,。,“”,,,,。STREAM,、,,,。:[1].[D].:,2006.[2]ChoongHK,ParkK,FuJ,etal.Architecturesforstreamingdataprocessinginsensornetworks[C].De-partmentofComputerScience,UniversityofTexasatArlington.2005IEEE.[3]Arasu,A,BabuS,WidomJ.TheCQLcontinuousquerylanguage:semanticfoundationsandqueryexecu-tion[C].Technicalreport,StanfordUniversity,2003.[4]ArasuA,BabuS,WidomJ.TheCQLcontinuousquerylanguage:semanticfoundationsandqueryexecu-tion[J].StanfordUniversity.VLDBJournal,2005.:2007-09-03:(1982-),,,,、、;(1949-),,,,、、。(3),,95℃。,,1。(4),。(5),,。7500kV,、,,,。[1]GB蛐T15164-1994.[S].[2],.500kV[J].,2004,32(1):13-17.[3],.[J].,2005,177(2):35-36.:2007-09-20:(1979-),,,,;(1968-),,,,;(1979-),,,,。(13)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!18
本文标题:500kV大型油浸式电力变压器超铭牌容量运行风险控制
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