浅谈输电线路雷电绕击与反击-吴健儿

2007443浅谈输电线路雷电绕击与反击1DiscussiononLightningShieldingFailureandCounterattackofTransmissionLines:,220kV2400,。:;;:TM865:B:1007-1881(2007)04-0043-04吴健儿(,310009)、、,。,。,220kV,,。,,。12:,。,,。3:,;,;。,,。1.1,,,:Ugt=Rchigt+Lgtdigtdt(1):Rch———,Ψ;igt———,A;Lgt———,H。,,,,。1.2,。,。1L1L2,ZHEJIANGELECTRICPOWER44200742L2,,L2,。2240014,,,。20068715:57,2400A,,,。5km(13-14),7.5km(14-15),,14A,,,A,,8715:52-16:02(5min),2400149。240014,Z2+3,26.7m,33.2m,9.6°。,A(),24°。:LGJQ-400,:GJ-50,XWPz-70,3,13。10-16,2411m,458m,650m,970kg。32Ψ。2.12,(EGM)。,,。EGM。,,。EGM,,。,,,,。,。,,,[2-4]。(1),[2]2。,14。:rK=(hd+hb)2[1-sin(θ+α)]=(14.1+26.4)2×[1-sin(9.6+24)]=45.29m:hd———;hb———;α———;θ———。:rK=8I0.65K(,IEEE)IK=14.4kA,IK=14.4kA,。(2),,,,,14Imin=U50%100=11.4kA2007445150%U50%/kV/mLgt/μH/β/K1hd/mhb/m//Lgt=0.5×h//120033.216.60.881.2514.126.42,,,、、、、、1411.4kA。,:Imin≤Ia≤IK11.4kA≤Ia≤14.4kA,,14,14.4kA,。2.22400141。K[1]。K=K1×K0=0.239414I14:I14=U50%(1-k)[β(Rch+Lgt/2.6)+hd/2.6=38.37kA,1438.37kA。,38kA(62.5kA),。3,、、。,、、、、、。:,。2。,,。、。2400:14,,,,。,。4,、、、,。。4.1,。,,:4620074。,、,。,,10°,1.5[5],。、、,。,,20°30°70%,,,。,。,,,,[5]。,、,,。4.2。,,,。55.1(1)。,。500kV。,220kV。(2),,。,,。,,,。(3),、。、。(4),,。5.2(1)。、。,,,。(2),、。,,、,,。(3),。,。,,,,,,。,,。6、,。,,,,、,,。(下转第56页)5620074[2][3][4][5][6][7][8][1]ZhuXukai,YangYihan,LianHongboetal.Studyonfer-roresonanceduetoelectromagneticPTinungroundedneu-tralsystem[J].2004InternationalConferenceonPowerSys-temTecknology,2004,1:924-929.ShottH.S.,PetersonH.A.Criteriaforneutralstabilityofwye-gounded-primarybroken-delta-secondarytrans-formercircuit[J].TransactiononAIEE,1941,24(4):997-1002.StuckenC.,MonfilsP.A.,JanssenN.etal.Riskoffer-roresonanceinisolatedneutralnetworksandremedies[J].Proceedingsofthe14thInternationalConferenceandExhi-bitiononElectricityDistribution,Part1.Contributions,1997,1:18/1-18/6..10kV[J].,2004,40(4):269-271.,.[J].,2006,(2):24-27..[M].:,1998:237-240.,,.[J].,2003,29(11):15-17.,.PT[J].,2004(6):67-70.[4][5].[J]..1998,24(3):17-20.,.[J]..2006,42(3):205-207.[1][2][3]DL/T620-1997.[S].:.,.[M].:.2003.2.IEEEStd1243-1997.IEEEGuideforImprovingtheLightningPerformanceofTransmissionLines[S].1997.(上接第46页)::2007-03-06:吴健儿(1975-),女,浙江东阳人,硕士,工程师,从事电力系统过电压管理工作。。3,,:(1),,,,,、、[7-8]。(2),,。,,。,,,。,,。,。::2007-01-24:许解(1981-),男,浙江嵊州人,学士,助理工程师,从事变电检修工作。丘扬(1981-),男,浙江杭州人,学士,助理工程师,从事变电检修工作。,: