简介：TopicsofcurrentinterestInthelastissueofthisjournal“ELECTRICITY,CSEE”areportwaspresentedontheInternationalConferenceonPowerSystemTech-nology’91wherespecialistsfrom15countriesweregatheredtogethertodiscusstopicsofcommoninterest.Severaloutstandingproblemsdeservespecialreport.Forinstance,thegreenhouseproblemwasreportedinthisissueunderthecolumnofpowerandenvironment.Theoperator’strainingsimulatorisreportedinaspecialarticleinthisissue.Sinceaseriesoflargescaleblackoutsoccurredinseveralcountries,particularlythe1977NewYorkCityblackout,peoplerealizedthatoperatorsinthemodemfullycomputerizedandautomatedcontrolcenterneedconstantpracticeonasimulator,sothattheycanbefullypreparedtohandlesuddenattacksofseveredisturbances.Thecurrentprob-lemsandviewsfromseveralcountriestakingpartinthepaneldiscussionwerereportedinthisissue.Somenewtechniquesattractingmuchattentionfromresearchersinthefieldofpowersystemtechnology,suchasfuzzysystems,ExpertSystems,ArtificialNeuralNetworksandPetriNetswerediscussedtoquitesomeextentinthisconference.Theyarealsoreportedinthisissue.Morespecialsubjectswillbereportedinlaterissues.(Ed.)

简介：ThispaperputsforwardanewfaultdiagnosismodelbasedonPetrinet.Inthisnewfaultdiagnosismethod,anassociatedtreeisfirstdefinedtodescribethelogicaccordingtotheprotectionsandcircuitbreakers.AfterthataPetrinetdiagnosismodelcomesintobeingandtheprecisediagnosisofpowergridelementscanberealizedatthesametime.Thesimulationresultsgiveninthispaperillustratethatthisfaultdiagnosismethodcanmakearapiddiagnosisincomplexfaultsituationandgiveaccurateresultstopowergridfaultdiagnosis.

简介：TheceremonyforopeningoftheStatePowere-CommerceNet(http://www.powerec.com.cn)andfoundationofBeijingStatePowerUnionB-NetCo.LtdwasheldonFeb16.E-Businessisanimportantpartofpowerinformationsystem,powersystemhassolidfoundationtodevelope-businessandhugemarketdemand.