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1,2,2(1.,710049;2.,030024),,,,,,;;;1[1],[2],,,,,[3],[4],,,,,[5],22.1,,I(3)scmaxIac,Iac=crI(3)scmax(1),cr(1.21.3),,1m1n,1I(2)scminIac,Iac=crI(2)scmin(2)[4],,..,1998,(18)1:56.[5].MIS..1998,3,9:A15.[6]..PC2WORLDCHINA,1995,4:32.:19981203:(1960-),,,,,THESTUDYOFINFORMATIONMANAGEMENTAUTOMATIONINELECTRICALPOWERSYSTEMLUANZhao-wen,WANGHong-tao,WANGYong(ElectricalPowerEngineeringSchool,ShandongUniversityofTechnology,250061Jinan,China)AbstractThisarticlestudiesthecurrentsituationanddevelopmenttendencyofinformationtechnology,andcombinesittogetherwiththerequirementofinformationmanagementautomationinelectricalpowersystem.Itputsforwardasystemintegrationtechnologytoconstructmo-dernelectricalmanagementinformationsystem.Keywordssystemintegrationtechnology;MIS4219999RELAY275,(1m-1m),12,23,aa,bbcc,12,,,,,2,,,,,,,33,1,2,,3,3Icos=c(3)(3),c,,4,4,A,BC,D,EFc1c2,44,,,,ÛI3SC=0.25,500m,,,cos=0.4,,,,cos=0.82,52300m,,D,I3cos=c(4)(4),c,,,,4Dc=0.14,c1c2,c1I3SC+c2cos=1(5)c1c2,,4EFc1c2,,,,4Ec1=1c2=1,Fc1=1.25c2=0.92.2,,,,120,,,,,,,5120,/ÛUout=-(ÛUa+a2ÛUb+aÛUc)=-3ntRÛIa2(6),ÛUout,ÛUaÛUbÛUcABC,a=ej120nt,R,ÛIa2A(6),52.3,,,,tactac=1600ln[(2-1)/(2-1.2)](7)(7)6,,633.1,,,,,76219999RELAY2757A2,8CA2,8D,,,,8E,V/FBV/FCPU,,,,,,CPU3.2[4],9CPUInIscmax89Iac21Iac22I2Iac21Iac22,IIac21,,Iac21I2Iac22,,CPU10,CPUI1,I18In,,CPUI13In8In,,,CPU;,CPU,10s,72,CPU;In3In,,CPU,,CPU,CPU,,,4BKD2-400Z/1140(660)Z(F)1993,,:Vn=1140V,51#,KSJ2-320/6,,1210,10,,,,,50ms,,(cos=0.4),10s,CPU,11s,,,,,,1(A)(A)(A)C1C2350420023000.801.10.9100ms75ms350420023000.321.10.910s11s350420017500.911.10.9100ms84ms350420017500.421.10.910s11s220420013200.851.10.9100ms80ms220420013200.351.10.910s322042009000.951.10.9100ms88ms22042009000.451.10.910s12s220420022000.751.10.9100ms52ms2(A)(A)(ms)(A)(ms)220905150139AC2501h65min2201010150135BC27530min28min220832150142AB31010min8.4min220415200175A3405min4.5min220356200177B4602min1.8min220310200181C70030s28s5,,,,100ms,50ms,150ms,,,,,,(41)8219999RELAY275:19990315:(1974-),,,;(1968-),,,;(1968-),,,XND-2000SERIALAUTOMATICSYSTEMFOR35kVSUBSTATIONSUNFu-ding,LIShu-jun,WEIJian-xiao,HUANGSheng-chun(XuchangRelayResearchInstitute,Xuchang461000,China)AbstractToautomationbuildoftownandcitypowernetwork,introduceanewdistributedtypeautomaticsystemforsubstation.Puttousetwocascadenetworksofbusmodel,whichcombinecurrentgeneralEnthernettechnologyandadvancedreliablereal-timecontrolnetworkandareopenandextendible.Keywordsagriculturalpower;automation;networkstructure;protectionsupervisorycontrol(28),,,[][1].:,1992.[2]..:,1991.[3]..,1996.[4]BishopMT,etal.Overcurrentprotectionalternativesforun2dergrounddistributionsystems.IEEETransonPowerDeliv2ery.1995,10(1).[5]..,1995,(1).:19981026:(1957-),,,OVERCURRENTPROTECTIONINUNDERGROUNDEXPLOSION-PROOFVACUUMFEEDERSWITCHGEARSONGJian-cheng1,LIANGYi-long2,MENGRun-quan2(1.XianJiaotongUniversity,ShanxiXian710049;2.TaiyuanUniversityofScience&Tech.,ShanxiTaiyuan030024)AbstractThispaperisbasedontheimportanceofinstallingovercurrentprotectivesysteminundergroundLVcabledistributionnetwork,nar2ratesthefundamentalprincipleofovercurrentprotectioninundergroundexplosion-proofvacuumswitchgear.Muchmoreattentionispaidtotheanalysisofthemethodhowtodefinethecharacteristiccurvesofphase-sensitivesymmetricalshort-circuitprotectionandthediscussionofallfactorstointerferewithitsactionreliability.Besides,thehardwareblockdiagramandsoftwareflowchartoftheprotectivesystemcontrolledbysingle-chipmicrocomputerisalsointroducedinthepaper.TheprotectivesystemhavebeentestedbeforeappliedinundergroundLVdistributionnetworks,Theresultsobtainedareconformitywiththedesignspecification.Thefieldexperienceshowthattheprotectivesystemisgoodprac2ticeinstabilityandreliability,andwillbeofgreatappliedvalueinminingindustry.Keywordsvacuumfeederswitchgear;overcurrent;phase-sensitiveshort-circuitprotection;negative-sequencecurrent1419999RELAY275