IEEETRANSACTIONSONPOWERDELIVERY,VOL.17,NO.1,JANUARY200247AnAgent-BasedCurrentDifferentialRelayforUseWithaUtilityIntranetDenisV.Coury,Member,IEEE,JamesS.Thorp,Fellow,IEEE,KennethM.Hopkinson,StudentMember,IEEE,andKennethP.BirmanAbstract—Thispaperproposesanagent-basedcurrentdifferen-tialprotectionaswellastheeffectofcurrenttransformersatu-tialrelayforusewithacommunicationnetwork.Agentsaresoft-rationconcerningthesensitivityoftheprotection.wareprocessescapableofsearchingforinformationinnetworks,Thispaperproposesanagentbaseddifferentialrelayforuseinteractingwithpiecesofequipmentandperformingtasksonbe-halfoftheirowners(relays).Resultsillustratingtheperformancewithautilityintranet(UI).Agents,asproposedinthispaper,oftheagent-baseddifferentialmethodproposedactingwithinaaresoftwareprocessescapableofsearchingforinformationincommunicationstructurearepresentedfordifferenttrafficcondi-networks,interactingwithpiecesofequipmentandperformingtions.Theseresultsalsoshowthatadedicatedutilityintranetisatasksonbehalfoftheirowners(relays).Moreover,theyareau-viableandrecommendedoptionasacommunicationmediaforthetonomousandcooperative.Veryfewpublicationsconcerningproposedscheme.theapplicationofagentsintheprotectionfieldhavebeenre-IndexTerms—Agenttechnology,differentialprotection,re-portedintheliterature.However,Tomitaetal.[5]proposedaco-laying,transmissionlines.operativeprotectionsystemutilizingagents.Relayagentswereconstructed,andthecooperationofthemainagentswassimu-I.INTRODUCTIONlatedforprimary,backupandadaptiveprotection.Couryetal.[6]discusstheadaptationofthesettingsofdistancerelaysforURRENTdifferentialrelaysarewidelyusedforthemultiterminallinesemployingagents.Itisshownthatthedig-efficientprotectionofbuses,generatorsaswellaspowerCitalrelaysandagentsactingwithinacommunicationstructuretransformers.Whenappliedtotransmissionlines,problemscanalteradaptivesettingstoensurecorrectperformanceoveraariseduetothedistancebetweenthelineendsandconsequentlywidevarietyofoperatio