RED670熔丝熔断监视功能(英文)

1、7/7.1 InrodctionThe aim f h fus file spervision functin (FSD)sto lock lt measuing fnctionsat aes in the seondary irit beteen the volage trafor adthe IEDi rder toavoid unantdpaton that thrwse mighor。Thefuse failur supervsofunction basialy haswo diffnt algorithm, niveseqenead zro sencbased algorihm an

2、dan dditioal lt oltge ndelta urret gorithm。Thenegativeseqnce detecton algrthmi recommendedfrDs us in isolatdorigimpeance eathed netws. It i bsedon te egaesequenc measurg quanties,ahgh vlue of vltage3U2 wihutpreece f the negtivesequnc current 3I2。Te e eqece detionalgh is ecomende fr Ds sed ndrecly or

3、lowimednceerthd etworks. It is baeon theer seence asuing qutitis, a hih vluofvoltage U0 withutte presenc of th reidacrent 3I0A critrion bsd on dta cuetan eltvotae measuremnts cn e added o these failusupervision uncton in rdert dtc a hre phasefse failure， which in pactic moreaoced withvltage trnsform

4、er switcngduring staionorons.oretteaptation to stm reqrements， anoration oe seing haben itrduewhich aks it ossble o seect teoeratng cditinsfr egative equenc ndzero squencebsd functie slection of diferet operatomos make t ossbl chseiferen nteratioossibilitis between the ngativ squenc ad ero seuenebsd

5、 agortm.2。2Piciple o peraton2.21 ero sequenceTheunction can best nfive different modeby setgh paameterOpMode。 he zeo euncefucin contiuousl msu the intrlcurrents and oltes in al threephse ndcalate: thezero-seqnce vltae U0 the zeroequnc rren 3ITemaured signals ae cmprwththir respcve st alue U0 ad 3I.T

6、e fnto eale theinternalsignal FueaiDet if he measu zero seqencevoltaeishighr han he e aue 3U，themeasuezero suence urrent i low he set vue3I0for moe tha 0 secns at the same m as the latch o sa in sgal isset formoe thn5 scnds(that isue il i dtted）, al phse crrtare below th seting IDLD (otelevel for de

7、a ine etetion) n the irct beaker is clsed (nput CBCOSED isacivate）Thi niton covers orfue flreat open beakr pstionFusefailurecndition is ulached whee normalvolta cditos ae retord（SUL1N ST2STUL3N )se failur ondiion sstre in t non volatile meoryin e ID。In tnestar-up proceureeE hecks he 3P（SOE3PH) vue n

8、 its ovolatle memory an establihesthe correspondingarting condion。npt andouput sinalsTe tput snl3P， LKU and BLKZ can be bloced inthe fllowing cnditns：he pu BOK iscivated T inpt LKSP is activate t th saeie s any o the ineal signalsStrtusefai3Ph，SttFefailResor SartFefaenare preset The operaon mode sel

9、etr OpMde is set o O。 The IED i n ESTstats (TEST-ACTVEis ih） nd thtion as eelocke from th (lockUEY)he input BLOCsga is ageerl prpo ocking sinal of te ue falure suervisiofucion. It can be concedto binynputof heIED in orer to reiv a bock ommandfro ternal devies ra b sofe ontdo oer interal fnions o the

10、 IED itselfin rder ceivealc command rm intrnal fucts。Through ORgat an connecedto bt binryinpus andineal fno oupts.Te inpt BLKSP is intne tobconete o the trip outputt ay of the protectifuionsiluded in th IED When actvtedfr tan 0 s， he peraton ofh ue failue is bockedurng a fiim 00s。 Th aim i oincrase

11、te seurity gst unwneoperationsduring hopening of the reke,wch mig au unbala conitin fowhich the usefailure migoerat。h output sina BLwil alsobe blcke f the itra ead line detetion is atiated. Thblock signal has a 0 s ro-f tme deayhe iput siga MCBOPis suposd to bonneted i a erminal binar ipto th C。auxi

12、liary conact f the niatueircuit breker prtcting h VTenary cirt。TheCBOP gnal set te otpu snalsBKU andBLKZin order to lock l the oltage reltucions when the Mis oen Th aditioal dropoff imer o 15ms polose presnceof MCBO sinal o eve eunante opetion f votge dpnden unctondue to nonsimultneoscosng f t mainn

13、cts of he minatue ircuit brakerhein ignDISCPOS supposed tobecnected ia a eialbinar nputto eNC.axiay cotact telie disconecor Te CPOS ignasetsth outp signal BLKUine o lo e vltage elat funtio he th i dsconnecto s ope Th imedanceprotection funcionis ot affcteby t poion of the line disconectrsine therewi

14、ll be nolin curns ta can ce malopratin of hestace prottion。 IfSCOS0itsgnifiesthat te ie isconc tohe ysemanwhethe DIP1 i signiies tat te line is discectefomthesysem an th lck snaLK is enredTe outt LKU an usedfoblockn thevoltage rlated meaurig tions （nervltaepotecton, syncrchc etc。) excp the impedance

15、 protectin。The fnction utut BLKZ ca used r blocking te imedanceprotection untio.f thefuse aiucntion is deteted for morethnfive scod nd at lastone of th phaesas alwphasto eath voltage, then the fufaile condtionis latche：ignal BLK i turhgh, if hereis nde lne cdion so LKZ ihigh;if all te threpaeave o v

16、oltage（STL1N SUL2= SUL3N 1）ten the outpt sinl 3is turd igh.Te otp sgnal 3P is hih if e use ailure ndiiois detct fr 5seconsand all hthee msre vlaes ae low e thrphase citeriowil also set theouutBKU anBLK. The BLKZ illnlybe activatd if ntt nernal dea lne dtectins actitedt teme ti.T fusefaiure cniti isu

17、lachdwhenhe normal vlag onditios ae rtod(S1N= STL2N STUL3N = 0）。2.2.2 NgtivequcThe negatve sequence opertes in the samea s h ero sequce，but it calculats tegtveeqe comnen of rret n votage 。e.：theegative eunce curetI2th egativ seuence voltae U2Te measurd ignals areompare ith thei repect set value U2 a

18、n 3I2。eignl STZRO is se to 1，f the negativ see masudvoltge xcedsits setval 3U2 and if th netiv sequecemeasedurrent dos not exced isprevalue 3I2 in ny phs at t same timeas the cruitbrkerisclse（CBLOSED= )he agnitd Uis highr han the ettng U n theagntde of I s blthe setng DIin an hase thesae tme s the m

19、agnitude o the hascuret in th se ph is higernth ettIPh.Te first criteion rquirs tha the internl sinal DUDIshale ctivatd in any ase at hesame tme as cirui breakerclose. Open ircutrker a one endn neriing he inefro othe n onto a aut could leadto wonat the fus failuefucona te nththe op breaker. If thisi

20、s consiering t be aimprt iadvaage, connctte BCLOSD ipu o FALE。 Inthis wy ny teseond citrion can ctivat thesignDUDIThesecon criterion means thatette fus ailure n oe pse togher t highcrnt fthesame phae wil sethatch. Themeured phase ur i setodce he risk of falsefse fire detectn If thecurrnton eroteed l

21、ie i w， a oltagdrop it yem （notause byfefaure) s ot certai flowd by crret hanged als fse failure migtoccur. prventhat the se urrn criterionis inroduedIf h ltchisset and if alleasued olags ar low （ow tha th setg Uph) the otputHwill acivted ndcating fuse faile in all ree phasehoutu Land BKZill ctivate

22、da well。If te voltage islo in any phae orre t 5secons(SULN， SL2 or SL3=），the STDUI ina is eaed i。2.4Opeati odThe fue ailresueriso fcton an chdon or ofb te tig paramete OpeatiotoO or OffNegativ and zero equence algorthmor increaed lexibiltyand apaionto ym rqirmnts,anpertion de lctor， pMde ha beninrod

23、uce mket possble to selc diffretoatin moes rte ngativeando sqence badalgrithm。 he diffeent operain modes r： pd = Off； the etiv and er seuee functon s sihedff pMoe = NsINs; eatie squnce is slcted OpMod = UZsIZ； roseuenesslectedOpMo = UZsIZs O I； Both negaivad zr quce sactiaed adwoing n palleln an ORondito OpMod = UZsZsAD UNsINs