275Vol.27,No.5200511CHINESEJOURNALOFLOWTEMPERATUREPHYSICSNov.,20057531,31111121,1000802,100080200310,200475.,,.10,75,,.:,,PACC:0150M1,.1997,11kABi;2000,62kA,.,,.,20021010.5kV/1.5kAHTS,[1].20038,.10,,20047510.5kV/1.5kAHTS,.,10,75,..3863(No.2002AA306161).:20052042015:752102.110.,,1T2P.,.,,,,1.12,;23(),();31,,..2.22,10.[2],,,.,[3].3,.2103102.310,(),8(2,15),4050.410,,.5.9601274105103753.175,6,10.,,7,1W.,,,,.,,.,.,75,8.67577507015:758759753.275200411,,.975,.75,,,1.,1,1/31/4,.1/W/W/lh-1866291()5751618341274(69%)560(31%)321300A22981756(76%)541(24%)423.3,75,.15,7.5,76%(2.35kW@10m/1.8kW@75m),1300A74%(3.1kW@10m/2.3kW@75m).,,.59%(54l/h@10m,32l/h@75m),1300A58%(70l/h@10m,42l/h@75m).,,,.,75,,31%;1300A,,24%.1,,,170127,,,.,,.,1,75,1300A42//75m,0.43/m.kA.hr,.410,75,,..[1],,,,(1991).[2],,,,,(1985).[3],,,,,,1010.5kV/1.5kA,,2004,(2).27015:75CRYOGENICSYSTEMFORTHE752mTHREE2PHASEACHIGHTEMPERATURESUPERCONDUCTINGPOWERCABLEFANYU2FENG1GONGLIN2HUI1XUXIANG2DONG1ZHANGLIANG1WUJIANG1LILAI2FENG1XIAOLI2YE21TechnicalInstituteofPhysicsandChemistryofChineseAcademyofSciences,Beijing1000802InstituteofElectricalEngineeringofChineseAcademyofSciences,Beijing100080(Received1April,2005)Afterthecompletionof102mHTSpowercablein2003,thebuilding,commissioningandelectricaltestof752mHTSpowercablehavebeenfin2ishedintheendof2004.Thecloseliquidnitrogen(LN2)flowwasadoptedtocooltheHTSpowercableandtheirterminations,andtheliquidnitrogende2compression(LND)methodwasadoptedtoachievethecoolingpowerinbothofthetwocryogenicsystems.Throughtheheatexchangerinasub2cool2er,thecoolingpoweristransferredintotheloopLN2system.Basedonabriefintroductionofcryogenicsystemfor102mpowercable,thispapermain2lypresenttheresultsofcryogenicsystemfor75mHTSpowercablesinthecommissioningandelectricaltest.Inaddition,wealsoobtainedtheeconomicparameterofcryogenicsystemforHTSpowercableaccordingtotheanalysisoftheheatbalanceintheLN2loopsystemandtherelationbetweencoolingpowerandLN2consumption.Keywords:HTSpowercable,cryogenicsystem,LNDmethodPACC:0150M3701