青藏铁路110kV输变电工程五道梁与沱沱河变电站的接地系统设计.pdf

30! 4" #$%& Vol. 30No. 4 2006'2( PowerSystem Technology !"#$1000-3673%2006&04-0060-05 '()*#$TM862 +,-.$A /01.$470?4037 2345110kV6789: ;<=>??***@78ABCDEFGH !" 1#$ % 1#& ' 1#( ) 1#*+, 2 1!"#$%&'"()*+,-./012345 6789":$;< =>?***@AB100084C2!******@E"#(FG<******@EHI?810008; GroundingSystemDesignofWudaoliangandTuotuoheSubstationsfor110kVPower TransmissionEngineeringofQinghai-TibetRailway HEJin-liang 1)KANGPeng 1)ZENGRong 1)ZHANGBo 1)HUAPu-xiao 2 *1+StateKeyLab ofControlandSimulationofPowerSystemsandGenerationEquipments *Dept. ofElectricalEngineering)TsinghuaUniversity,)HaidianDistrict)Beijing 100084)China- 2+QinghaiElectricPowerDesignInstitute)Xining 810008)QinghaiProvince)China, ABSTRACT: The110kVTuotuoheandWudaoliangsubstations supplyingpowerforQinghai-Tibetrailway locateinarctic-alpine permafrostarea,soitisveryimportantfortheconstructionof substationhowtodesigngroundingsysteminarctic-alpine theinsulationwithstand propertiesofsecondarycablesanddevices, it isproposedthat the icfieldtoelectrical parametercalculationofgroundingsysteminlayeredsoil, roundingsystemin arctic-pared,the arrangementregularityofdeeply-buriedverticalgrounding electrodes,theburialdepthofhorizontalgroundinggrid,the influenceofgroundingsystem’soptimalarrangementon groundingresistance,touchvoltageandstepvoltageof gr