Page 70 - ECLECTIC MARCH-2022 INSIDE PAGES_p2.indd
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(21) were used for 132 kV and 220 kV
sensing and Master trip relay operation with feeders. In case of communication failure,
pre-defined time delay.
8a7nLd g2o20t bkVlofecekdeedrs.aDnudrinognltyhodsiesdtaanyscien pthreotpeacstt,ioonnly
Back-up Protection: 3 O/C and E/F (using IDMTL over woanse laincetidviefferfeonrtiatlhperocteircctiuonit.(8T7Lo) aenndhoannecdeisttahnece
replrioatbeciltiitoyn (21)owf ere upsreodtfeocr t1i3o2nkV ansdy2s2t0ekmV f,eedewrse. In
In ecaurrrleienrt) days pilot wire based differential pcraosgeroefscsoemdmuntoicatiuosnefailu-re, t8w7Logotsbeltosckeodfandlinonely
relays were used for protection of EHV lines
andLodckeeddicaBtreeadkerpilBoatckuwpire(sLBBw) eprreoteuctsioend isto also ddififsetarnecnetpiarol tecptrioontewcatsioacntsive faorntdhe coircnueit. Toseenthaoncfe
etrnadntissnri.fcpeorrrWeplaoIiynrtahotteeprdettriromainptieotnh,sewigpbitnaihlsaoipsltsroef-wdbceuierfiretrnwesendet etshiemnanvesitendhgeelaabyne.tdweMnoaster dtihsetarnecliaebiplitryotoefcptiroonte,cntioonwsaydstaeyms, .wAevapirloagbreilsisteydofto
replIanceeardlier dawyistphilot woipretbicaasel d difffiebreenr tial rfeolarys wtehreeused cuosme m- tuwnoicsaettsioonf linechdaiffnenreenltial ipsroteoctfionsuatnmdoosnte
comfomr uprnoitceacttiioonnofoEfHVlinlineesdainffdedreednictiaatel drepillaoyt wsiraesswere imsept oorftadniscteancien pcraotseectioonf, tnhoewaldinayes. dAivfafeilarbeinlittyiaol f
welluasesdfotor ttrraannsfsefreInrrteinrtgripInstigenrtarlsipbsetigwneeanlsthfoertwoourends. pcroomtemcutinoicnasti.oTnhchaatn’snewl ihs yofduitfmfeorsetnimt pooprttaicnacel finibcraese
132WkVith atinmde, 2pi2lo0t wkiVres fheaevedebrese.n Drepulraicnegd wthitohsoeptical rooooofupffaatttiehclliieansnleelfia.inb.rereedrcioffrueetraeesntetaidrael fcporreorateteecadtciofhonrsd.eTaifhcfheatrd’seiffnwethrieaynldtiriaefflelrareelyanyt
daysfibeinr fothr ethepacsomt, mounnliycatoionneoflinlinee ddiiffffeerreenntiatilarlelays
protaescwtieolnl a(s8fo7rLt)raannsfderroinngeIndteisrttraipnsciegnpalrsoftoercotuior n132kV
B/U O/C & E/F
with LBB
LineDiff‐Main‐1 through FO route‐1
Line Diff & Distance‐ Main 2 through FO route 2
Figure 1: Traditional Optical-Fibre based protection for 132kV/220kV feeders
Fig 1: Traditional Optical-Fibre based protection for 132kV/220kV feeders
FURTHER IMPROVEMENT instantly from main route to backup route automatically
II. Further Improvement: insintacnastelythefrcoommmmunaicinatiornofuatiles fotrothebmacakinuppathr.oute
Constant efforts are being made to improve the afourpAteotphrmfieoloratmmthiacaanasicnlaelylrpeoaianfdthycc.oabmeseemnutdhnoeicnaectiotoomncmhcehucaknnintcheael toieopmnepraflotaioyilinsnagl
Cthoennposperpotwtarticoenactttleetificocebhntfenifosrooybnlrsoattgessemys.dayaTcrsoneotdemebmmmnehauikannenaigccniteadmtmioroeanmrliedacbahereiakllinitteayonb,eletliismwtbaoyprmearsudoeosovprepeeadtrianfotger this standard in the line differential relays of different
reliaebacleh dibffyerenatdiaol pretlianygof anelinwe. Ttheecnhenwoltoecghyn.oloTgoy for
enhcaonmcmeurneicliaatibonilitcyh,antwneol –s“eIEpEaErCa3t7e.9o4 psttaicnadal rfdib” aellrows A mpailnoutfahcatusreraslrfeoradany EbHeVencircduoitn. eSutboseqcuheenctktothtehis
basfeodr hcavoinmgmtwuonriecdautniodanntcphaathnsn, weiltsh parroevisuiosnetdo tfraonrsfer opseurcacetisosfnual lpilpote, rwfoermimapnlecmeenotefd citomform4unnoics.a1ti3o2nkV
each differential relay of a line. The new chfaeendneersl foermfuprtlhoeyrionbgsertvhaistions.tandard in the line
differential relays of different manufacturers
technology for communication channel – for an EHV circuit. Subsequent to this
“IEEE C37.94 standard” allows for having two successful pilot, we implemented it for 4 nos.
redundant paths, with provision to transfer 70132kV feeders for further observation.
sensing and Master trip relay operation with feeders. In case of communication failure,
pre-defined time delay.
8a7nLd g2o20t bkVlofecekdeedrs.aDnudrinognltyhodsiesdtaanyscien pthreotpeacstt,ioonnly
Back-up Protection: 3 O/C and E/F (using IDMTL over woanse laincetidviefferfeonrtiatlhperocteircctiuonit.(8T7Lo) aenndhoannecdeisttahnece
replrioatbeciltiitoyn (21)owf ere upsreodtfeocr t1i3o2nkV ansdy2s2t0ekmV f,eedewrse. In
In ecaurrrleienrt) days pilot wire based differential pcraosgeroefscsoemdmuntoicatiuosnefailu-re, t8w7Logotsbeltosckeodfandlinonely
relays were used for protection of EHV lines
andLodckeeddicaBtreeadkerpilBoatckuwpire(sLBBw) eprreoteuctsioend isto also ddififsetarnecnetpiarol tecptrioontewcatsioacntsive faorntdhe coircnueit. Toseenthaoncfe
etrnadntissnri.fcpeorrrWeplaoIiynrtahotteeprdettriromainptieotnh,sewigpbitnaihlsaoipsltsroef-wdbceuierfiretrnwesendet etshiemnanvesitendhgeelaabyne.tdweMnoaster dtihsetarnecliaebiplitryotoefcptiroonte,cntioonwsaydstaeyms, .wAevapirloagbreilsisteydofto
replIanceeardlier dawyistphilot woipretbicaasel d difffiebreenr tial rfeolarys wtehreeused cuosme m- tuwnoicsaettsioonf linechdaiffnenreenltial ipsroteoctfionsuatnmdoosnte
comfomr uprnoitceacttiioonnofoEfHVlinlineesdainffdedreednictiaatel drepillaoyt wsiraesswere imsept oorftadniscteancien pcraotseectioonf, tnhoewaldinayes. dAivfafeilarbeinlittyiaol f
welluasesdfotor ttrraannsfsefreInrrteinrtgripInstigenrtarlsipbsetigwneeanlsthfoertwoourends. pcroomtemcutinoicnasti.oTnhchaatn’snewl ihs yofduitfmfeorsetnimt pooprttaicnacel finibcraese
132WkVith atinmde, 2pi2lo0t wkiVres fheaevedebrese.n Drepulraicnegd wthitohsoeptical rooooofupffaatttiehclliieansnleelfia.inb.rereedrcioffrueetraeesntetaidrael fcporreorateteecadtciofhonrsd.eTaifhcfheatrd’seiffnwethrieaynldtiriaefflelrareelyanyt
daysfibeinr fothr ethepacsomt, mounnliycatoionneoflinlinee ddiiffffeerreenntiatilarlelays
protaescwtieolnl a(s8fo7rLt)raannsfderroinngeIndteisrttraipnsciegnpalrsoftoercotuior n132kV
B/U O/C & E/F
with LBB
LineDiff‐Main‐1 through FO route‐1
Line Diff & Distance‐ Main 2 through FO route 2
Figure 1: Traditional Optical-Fibre based protection for 132kV/220kV feeders
Fig 1: Traditional Optical-Fibre based protection for 132kV/220kV feeders
FURTHER IMPROVEMENT instantly from main route to backup route automatically
II. Further Improvement: insintacnastelythefrcoommmmunaicinatiornofuatiles fotrothebmacakinuppathr.oute
Constant efforts are being made to improve the afourpAteotphrmfieoloratmmthiacaanasicnlaelylrpeoaianfdthycc.oabmeseemnutdhnoeicnaectiotoomncmhcehucaknnintcheael toieopmnepraflotaioyilinsnagl
Cthoennposperpotwtarticoenactttleetificocebhntfenifosrooybnlrsoattgessemys.dayaTcrsoneotdemebmmmnehauikannenaigccniteadmtmioroeanmrliedacbahereiakllinitteayonb,eletliismwtbaoyprmearsudoeosovprepeeadtrianfotger this standard in the line differential relays of different
reliaebacleh dibffyerenatdiaol pretlianygof anelinwe. Ttheecnhenwoltoecghyn.oloTgoy for
enhcaonmcmeurneicliaatibonilitcyh,antwneol –s“eIEpEaErCa3t7e.9o4 psttaicnadal rfdib” aellrows A mpailnoutfahcatusreraslrfeoradany EbHeVencircduoitn. eSutboseqcuheenctktothtehis
basfeodr hcavoinmgmtwuonriecdautniodanntcphaathnsn, weiltsh parroevisuiosnetdo tfraonrsfer opseurcacetisosfnual lpilpote, rwfoermimapnlecmeenotefd citomform4unnoics.a1ti3o2nkV
each differential relay of a line. The new chfaeendneersl foermfuprtlhoeyrionbgsertvhaistions.tandard in the line
differential relays of different manufacturers
technology for communication channel – for an EHV circuit. Subsequent to this
“IEEE C37.94 standard” allows for having two successful pilot, we implemented it for 4 nos.
redundant paths, with provision to transfer 70132kV feeders for further observation.
