阻波器检查的几种简单方法

,(,071003):,,,,,,:;;:TM73:B:100324897(2005)19200822030,,,,,,,,,,,,,,,,,1(1),,,,,,,,;,;;,21Fig.1StructureofHFchannel2Fig.2PrincipleofHFtrapper(L)(C),,(0.04),(L),(C)Lfz,P,Rp22833192005101RELAYVol.33No.19Oct.1,2005,,(3)3Fig.3Crossoverlossmeasurementofnearterminalonadjacentline,,(100),APABPB,:AJ=20lg|1+zLT1/ZB+ZLT2/ZL+ZLT1/ZS+ZLT1ZLT2/ZLZS|(1)AJ=PA-PB-8.6dB(2):ZLT1,ZLT2,ZS,ZL,ZS,ZL=ZS,ZS=-j70,ZL=400(-400),ZLT1ZLT2600,:AJ=26.7dB,,AJ=19dB,,,,,,1)3,A,BA,A,,4,CBA,CAB,A4Fig.4Crossoverlossmeasurementofnearterminalcontrasttotheotherline2)220kV,,,(5),BA5Fig.5Crossoverlossmeasurementcomparisonofnon2faultedchannelandfaultedchannel3).;,4),,,,,,6,f,,38,6Fig.6Relationoftrapperimpedanceandfrequency,,,10kHz,,,,,7,182.5kHz,140kHz,,,,7Fig.7Channellosscurveofpoint2by2pointmeasurement3,,,,,:[1].[M].:,1992.SHIYu2hua.CarrierChannelofElectricPower[M].Beijing:HydraulicandElectricPowerPress,1992.[2],.[J].,2002,30(10):73274.LUOLing,OUZhi2guang.On2lineTestofWaveTrapperinService[M].Relay,2002,30(10):73274.[3],.[J].,2002,30(3):56258.OUYANGQing,LUOJia2hua.MaintenanceandFaultProcessingofHFChannel[J].Relay,2002,30(3):56258.:2005201212;:2005204213:(1979-),,,,;Email:[e-mail](1957-),,,,SimplemethodsinwavetrapperinspectionFENGYang2zhou,LIHe2ming(NorthChinaElectricPowerUniversity,Baoding071003,China)Abstract:Highfrequencychannelasthesignaltransmissionpathofthecarriercurrentprotectionisimportanttothesafetyofelectri2calnetwork.Astheimportantconstituentinhighfrequencychannel,highfrequencytrapperinservicelacksoftestandmaintenance,astheresultthatwavetrapperbecomesacriticalfactoreffectingonqualityofhighfrequencychannel.Thispaperanalysesthewavetrapperpresentstestmethodsaccordingtotheconditionofactualwork.Keywords:wavetrapper;highfrequencychannel;fault48