分接开关油室气体继电器的选用与验证

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(200333):,。:;;;:TM403.4:B:1001-8425(2010)06-0052-07SelectionandVerificationofGasRelayinOilChamberofTap-ChangerZHANGDe-ming(ShanghaiHuamingPowerEquipmentCo.,Ltd.,Shanghai200333,China)Abstract:Theprotectivefunctionofgasrelayinoilchambeoftap-changerisexpounded.Theverifiedresultsofthesettingoilflowvelocityofgasrelayarepresetned.Keywords:Tap-changer;Gasrelay;Selection;Verification1IEC60214-2∶2004、GB/T10230.2-2007,()。,。1。(),。2。(2)。。,,。,。。,,。()。,3。4,123456789101112131481—;2—;3—;4—;5—;6—;7—;8—;9—;10—;11—;12—;13—;14—。1()Fig.1Twoindependentsystemsofon-load-tap-changingtransformerTRANSFORMER47620106Vol.47JuneNo.620106。。。DL/T574-1995《》4.1.2(4)()。()()()。,。,,,。,。,。,。,。,QJ4-25、QJ4G-25QJ6-25。(),。,。,30kPa。,。3。3.1,。,。,GB/T10230.2-2007《》,“”()。,“”。2Fig.2Oilflowcontrolrelay1002003004005004.03.53.02.52.01.51.00.50.2t/msP/105Paθ=25℃1m/s±10%3Fig.3Dynamicresponse(0~4)×105Pa4Fig.4Testdevicefordynamicresponse5347,。,。,,。,,。3.2,。:(1),,。(2),。3.2.1,(H2),(CH4)、(C2H6)、(C2H4)(C2H2),。,。,,。,。,。,C-H(338kJ/mo1),。C-C(),C-C(607kJ/mo1)、C=C(720kJ/mo1)C≡C(960kJ/mo1),。,830kJ/mo1,420kJ/mo1。,70%~80%。Ecp750kJ/mo1,750/22.4=33.5kJ/L。,。,。W=∫uidt(1)(1),u,u=El+U0。E,,E。,10000A,E=200V/cm;l。,,。CM600(5),K3,K11cm;U0,,U0=50V。u=200×1+50=250V。i,Im,i=Imsinωt,ω。ui(1):W=∫uidt=∫(El+U0)Im(sinωt)dt=∫[(El+U0)Im/ω](sinωt)dωt=[(El+U0)Im/ω](2n-1+cosωt)(2)Im———,t———,t=0.005s,ωt=2π×50×0.005=π/2n———,10ms,n=1(2),,U(UnUs)。U,,;,K1K2K3K4ω△1R1R2KAK1K2K3K4△15CMFig.5DivertermechanismofCMcontact546。,,t=20ms,n=2,;t=30ms,n=3,。U。,,6ms~8ms,2ms~4ms,t≈10ms,n=1。,。()。()K1Ik1=600A:Wk1=[(El+U0)Im/ω](1+cosωt)=250×600314×(1+cosπ2)J=0.478kJ()K2。Un=230kV±8×1.25%,Us=1.66kV,R=nUs/In,n=0.577,K2:Ik2=In2+Ic=In2+Us2R=(1+n)In2n=(1+0.577)×6002×0.577=822AK2822A:Wk2=[(El+U0)Im/ω](1+cosωt)=250×822314×(1+cosπ2)J=0.655kJ,20ms。,20ms,。,()(T=1s):F=3蒡W/33.5T=3×1.133kJ/[(33.5kJ/s)×1s]=3.433.5≈0.102L/s,V0=Ft=0.102L/s×0.01s=10.2mL。,。:V0=kUsIVtN(3)(3)k,0.9;Us1.66kV;I,I=3∑I=3×(600+822)=4266A;VkWs,40cm3~60cm3;t10ms;N,4~7。(),VN:V0=kUsIVtN=0.9×1.66×4266×0.01×40×4/106=0.0102L=10.2mL。,,。,,,。(D=2.5cm)S=πD2/4=4.9(cm2),:V1=F/S=0.102×1000/4.9=20.8cm/s=0.208m/sCM600,1。1,CM2(),0.63m/s,,1.0m/s±10%。K22()/m·s-1F/L·s-1/mL/m·s-1/A893W/kJ0.711K16000.478∑W=1.133,∑W=3.40.10210.210~140.208(I=In)0.416(I=2In)K28220.655K16000.478∑W=1.723,()∑W=5.170.15515.50.315(I=In)0.63(I=2In)K21()6700.5341CM600(R=nUs/I,n=0.577,cosΦ=1)Table1CalculationofdiverterparametersunderloadofCM600tap-changer5547,。,。,。CMD1000(6),,2。2,CMD1000,2(),0.86m/s,,1.2m/s±10%。,1.2~1.5,I≥(1.2~1.5)In,。3.2.2CM,K1,K3,(),,(5)。K1IK1InIc,cosФ=1,IK1=In+Ic=In+Us/R。K4,。Ic=Us/Z0,Z0,mΩ,Z0=50mΩ,Ic20。。,,。CM600,3。,CM1000,3.5m/s,,,。44.1,1.0m/s0.55N,1.2m/s0.75N。,,,F0=VSγ/2g。V=2gF0/Sγ(4)V———,m/sR1R2K1UsINR1R2K2K3K4K5K66Fig.6Transitioncircuitoffour-resistanceK3/A2725.5/m·s-1/mL/m·s-1W/kJ2.170F/L·s-1()K1K2300031332.3882.479∑W=7.0370.21210.43(I=In)0.86(I=2In)K37330.584K110000.796∑W=2.176,∑W=6.530.19519.520~250.398(I=In)0.796(I=2In)K210000.7962CMD1000Table2CalculationofdiverterparametersunderloadofCMD1000tap-changer:2Us=2500V、In=1000A、R1=0.5Us/In=1.25Ω、R2=1.5R1=1.875Ω、cosФ=1。566F0———,F1,1.1,F0=F1/1.1S———,QJ4-25S=4cm×3cm=12cm2γ———,0.88g/cm3g———,g=9.8m/s21.0m/s,F0=F/1.1=0.55/1.1=0.5N。V=2gF0/Sγ=2×9.8×0.5/(12×0.88)=0.928m/s1.2m/s,F0=F/1.1=0.75/1.1=0.682N。V=2gF0/Sγ=2×9.8×0.682/(12×0.88)=1.265m/s(4),。4.2:R,2.0m,,,7。,△P。△P,△P=P2-P1=γg(h2-h1)γ———,γ=0.88g/mm3g———,g=9.8m/s2△P4。4,。,。4.3,9L/min32L/min。V=21.22Q/D2,Q,L/min,DK4K1Ic/A50000K1K1(6)K31042∑W=(0.478+0.655)×2+0.478+1.307+40.27≈44.32F/L·s-11.323/m·s-12.70K1Ik1/A506006001642W/kJ0.4781.30740.273CM600Table3MinimumimpulseoilflowcalculationinpipeofrelayduringphaseshortcircuitfaultofCM600tap-changerr:3Us=2500V,In=600A,R=2.4Ω,ZO=0.05Ω。7Fig.7Testforstaticactioncharacteristicsofrelay4Table4Dataofactioncharacteristicsofgasrelayunderdifferentsettingoilflowvelocity/m·s-1P2=△P+17.2(kPa)(2.0.m)1.035.21.246.745.7156△P/kPa1829.528.535.7218.51.132542.2423.540.75747,D=25mm,9L/min,V=21.22×9/252=0.3m/s,。32L/min,V=21.22×32/252=1.09m/s,。1.0m/s1.2m/s,9L/min32L/min,5。5:(1),,。(2),。,。5,:(1)6。(2),。。,。(3),,。,,。:[1].[M].:,2004.[2].[M].:,2008.[3]、.[M].:,2006.[4].[J].,2005,31(5):87-88.[5].[J].,2006,(1):19-20.[6].[J].,2003,40(5):41-42.[7].[J].,1995,32(11):37-38.[8].[J].,2003,(3)35-38.[9].[J].,1987,34(8):6-10./kPa9L/min32L/min/m·s-10.301.091.0m/s189.035.226.21.2m/s25151.0m/s42.232.218.335.5/kPa1.2m/s2946.25Table5Testedandcalculatedvaluesofdynamicactionpressureofgasrelay:2.0m,P2=P1+17.2kPa。SF66Table6Selectionofgasrelay:2010-01-04:(1942-),,,,。58

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