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1、RESEARCHANDAPPLICATIONOFPROTECTIONTECHNOLOGY摘要：Abstract:ResearchandapplicationprogressofNARI-RELAYSinprotectionbasedonDPFCployedinline,busbar,transformerandgeneratorprotectionainandbackupprotectioninonedeviceandduplicateallocationissionlinesis806500kM,totalinstalledtransformercapacityis
2、1194000MVA,andgeneratedenergyoftheyearis164×1010kportantpartofelectricpo,protectionisthetechnologymeasurestoensurethesecurityandstabilityofpoentofelectricporequiresneanceofprotection.Neicroelectronics,puterandmunicationtechnologymakesitpossibletoimproveprotectionfurthermore.NARI-RELAYSE
3、lectricsCo.,Ltd.isthemainbaseofresearchonprotectionprincipleandtechnology,andamongtheleadingsuppliersofprotectionandautomationproductsinChina.Shehasmadegreatprogressinresearchandapplicationofneponent(DPFC).Shealsopossessesmanyinventionpatents.Theauthorsummarizedtheseresearchandapplicati
4、onprogress,presentedhisoalcondition;(2)Allfaultponentsareproducedbythesameelectromotiveforceatthefaultpoint,sothatfaultponentsatfaultpointarelargerthanelsealloadcurrentdoesnotinfluenceprotectionbasedonDPFCprincipleatall.FaulttransientresistanceslightlyaffectsDPFCprotection.Inmanycases,D
5、PFCprotectionhasexcellentperformances.ThefirstDPFCprotection,DPFCdirectionalparisonprotectionetimethistechnologymigratesfromlineprotectiontobusbar,transformerandgeneratorprotection.Largeamountofrealon-siteoperationrecordsprovedthatDPFCline,busbar,transformerandgeneratorprotectionareofhi
6、ghsecurity,highreliabilityandfastoperationspeed,andplayanimportantroleinimprovingelectricposecurity,stabilityandtransmissioncapacity.1.1.DPFCdirectionalparisonprotectionNomatterimpedancebackelectromotiveforceandfaulttransientresistance.LinefastprotectionbasedonDPFCdirectionalparisonprot
7、ectioncandistinguishbetbiguously.Thisprotectionostseriousfaultforelectricpotransientstatestability.Clearingsuchkindoffaultquicklyiskeytokeepsystemstability.Astolineprotection,mainprotection,i.e.pilotprotection,cannottriprelatedbreakerquicklyenoughitationofsignaltransmissiontime
