Protection System Design for Substation

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    QYM\DC\FMK SVS\DG LDSFNK@MYSTIS\O\FMK

    Qrdsdktdl Iy8

    Qobbovf Onorwob

    \rofkdd

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    \ED KDDL @MY QYM\DC\FMK

    Obb dbdctrfcob dqufpgdkts ukldrnm oikmrgobftfds fk tedfr bf`d tfgd lud tm

    vorfmus rdosmks+

    @mr dxogpbd8 O trdd `obbfkn mr tmucefkn ok mvdredol bfkd goy cousd o `oubt+

    O bfnetkfkn strfjd cok cousd fksubotfmk `ofburd+

    Ft fs kdcdssory tm ovmfl tedsd oikmrgob mpdrotfkn rdnfmks `mr so`dty m` ted

    dqufpgdkt+

    Dvdk gmrd fgpmrtokt fs so`dty m` ted eugok pdrsmkkdb wefce goy id

    dklokndrdl lud tm dxpmsurd tm bfvd ports ukldr `oubt mr oikmrgob mpdrotfkn

    cmklftfmks+

    O sgobb currdkt m` ted mrldr m` 41 gO fs su``fcfdkt tm id `otob/

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    @TKC\FMK M@ QYM\DC\FPD YDBOVFKN

    \ed FDDD ld`fkds prmtdctfvd rdboys os8 rdboys wemsd `ukctfmk fs tm ldtdct

    ld`dctfvd bfkds mr opporotus mr mtedr cmklftfmks m` ok oikmrgob mr lokndrmus

    koturd okl tm fkftfotd opprmprfotd cmktrmb cfrcuft octfmk +

    \ed gmst fgpmrtokt rmbd m` prmtdctfvd rdboys fs tm `frst prmtdct fklfvfluobs"

    okl sdcmkl tm prmtdct dqufpgdkt+

    \edmrdtfcobby spdojfkn" o rdboy systdg semubl id copoibd m` rdspmklfkn tmok fk`fkftd kugidr m` oikmrgobftfds teot goy eoppdk wftefk ted kdtwmrj+

    Emwdvdr" fk proctfcd" smgd cmgprmgfsds gust id gold iy cmgporfkn rfsjs+

    \m bfgft ted dxtdkt m` ted pmwdr systdg teot fs lfscmkkdctdl wedk o `oubtmccurs" prmtdctfmk fs orrokndl fk zmkds+

    \ed zmkds m` prmtdctfmk semubl mvdrbop" sm teot km port m` ted pmwdr systdgfs bd`t ukprmtdctdl+

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    @OTB\S FK O QM^DY SVS\DG

    O `oubt fk ok dbdctrfcob systdg fs ld`fkdl os o ld`dct fk ted dbdctrfcob cfrcuftlud tm wefce currdkt fs lfvdrtdl `rmg ted fktdkldl pote+ \ed gmst cmggmkokl lokndrmus typd m` `oubt teot mccurs fk o pmwdr systdg fs ted Semrt'Cfrcuft mr Seukt `oubt+

    @mrtukotdby" gmst m` ted `oubts ord troksftmry fk koturd okl goy vokfse

    wftefk o `dw cycbdsos wmubl id ted cosd wedk o twfn `obbs ocrmss o bfkdokl iurks mut ftsdb`+

    \ed iobokcdl terdd'peosd `oubt mccurs vdry rordby" occmuktfkn `mr oimut 4$fk tmtob" iut fs ted sdvdrdst m` obb typds m` `oubts" okl fs usdl fk tedldtdrgfkotfmk m` cfrcuft irdojdr rotfkn+

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    YDBO\FPDQYMIOIFBF\VM@ MCCTYYDKCDM@

    GMS\@YD_TDK\ SEMY\'CFYCTF\ @OTB\S

    S+Km+ \ypd m` S'C `oubt QdrcdktondMccurrdkcd

    ?+ Sfknbd peosd tm Nrmukl %B'N& >1

    9+ \wm Qeosds tm Nrmukl %B'B'N& ?4

    3+ \erdd peosds tm Nrmukl %B'B'B'

    N&

    ?1

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    @OTB\ OKOBVSFS & D_TO\FMKS

    Ot ted tfgd m` o `oubt" suce os ok mpdk'peosd" systdg wfbb id ukiobokcdl+

    Edkcd pmsftfvd" kdnotfvd okl pmssfiby zdrm sdqudkcd currdkts okl vmbtonds

    dxfst+ Tsfkn peosd vmbtonds okl currdkts obmkn wfte @mrtdscuds `mrgubos"

    obb pmsftfvd" kdnotfvd okl zdrm sdqudkcd currdkts cok id cobcubotdl+

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    o Sdqudkcd CTYYDK\S `mr lf``drdkt typds m` `oubts

    i Sdqudkcd PMB\ONDS `mr lf``drdkt typds m` `oubts

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    GOFKCMGQMKDK\SM@QYM\DC\FMKSVS\DGS

    \ed gofk cmgpmkdkts m` prmtdctfmk systdgs ord lfscussdl irfd`by idbmw8

    Fkstrugdkt \roks`mrgdr8 \ed C\s okl P\s+ \edfr purpmsd fs tm stdp lmwk ted

    currdkt mr vmbtond m` o ldvfcd tm gdosuroibd vobuds" wftefk ted fkstrugdktotfmk

    gdosurdgdkt roknd 4O mr ?O fk ted cosd m` o currdkt troks`mrgdrs %C\s" okl

    ??1P fk ted cosd m` o vmbtond %mr pmtdktfob troks`mrgdrs %P\s- Q\s+ Edkcd"

    prmtdctfvd dqufpgdkt fkputs ord stoklorlfzdl wftefk ted roknds oimvd+

    Qrmtdctfvd Dqufpgdkt8 o cmbbdctfmk m` prmtdctfmk ldvfcds %rdboys" usds" dtc+

    Ydboys fkcbuld fktdbbfndkt dbdctrmkfc ldvfcds %FDLs wefce rdcdfvd gdosurdl

    sfnkobs `rmg ted sdcmklory sfld m` C\s okl P\s okl ldtdct wedtedr ted

    prmtdctdl ukft fs fk o strdssdl cmklftfmk %iosdl mk tedfr typd okl cmk`fnurotfmk

    mr kmt+ @usds bfgft ted ogmukt m` dkdrny wefce `bmws tm o `oubt" okl `mrg o

    gohmr iocjup prmtdctfmk fk gdlfug'vmbtond okl efne'vmbtond lfstrfiutfmk tm?? jP+

    Cfrcuft Irdojdrs8 Cfrcuft Irdojdrs oct upmk mpdk cmggokls sdkt iy prmtdctfvd

    rdboys wedk `oubts ord ldtdctdl okl cbmsd cmggokls wedk `oubts ord cbdordl+

    \edy cok obsm id gokuobby mpdkdl" `mr dxogpbd" tm fsmbotd o cmgpmkdkt `mr

    gofktdkokcd+

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    YDBOV

    O rdboy fs o bmnfcob dbdgdkt wefce prmcdssds ted fkputs %f+d+ vmbtonds okl

    currdkts `rmg ted systdg-opporotus okl fssuds o trfp ldcfsfmk f` o `oubtwftefk ted rdboy.s hurfslfctfmk fs ldtdctdl+

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    DPMBT\FMK M@ YDBOVS

    F` wd zmmg fktm o rdboy" wd sdd terdd lf``drdkt typds m` rdobfzotfmks8

    Dbdctrmgdceokfcob Ydboys

    Smbfl Stotd Ydboys

    Kugdrfcob Ydboys

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    YDBOV @DO\TYD

    Dbdctrmgdceokfcob

    Ydboys

    Qrfkcfpbd m` dbdctrmgdceokfcob dkdrny cmkvdrsfmk fs usdl `mr

    ldcfsfmk gojfkn

    Jkmwk `mr tedfr runndlkdss okl fggukfty tm DbdctrmgonkdtfcFktdr`drdkcd %DGF&+

    Smbfl Stotd Ydboys Ldsfnk fs iosdl mk ted usd m` dbdctrmkfc ldvfcds fkstdol m` cmfbs

    okl gonkdts tm crdotd ted rdboy ceoroctdrfstfc

    Olvokcds fk dbdctrmkfcs dkoibdl ted usd m` bfkdor okl lfnftob

    fktdnrotdl cfrcufts+

    Qrmvfld gmrd `bdxfifbfty okl eovd bdss pmwdr cmksugptfmk teok tedfrdbdctrmgdceokfcob cmuktdrport

    Obsm eovd sdb` cedcjfkn `ocfbfty f+d+ ted rdboys cok gmkftmr tedfr mwk

    edobte okl rofsd ok oborg f` tedfr mwk cmgpmkdkt `ofbs

    Kugdrfcob Ydboys Fkvmbvds okobmn tm lfnftob %O-L& cmkvdrsfmk m` okobmn vmbtond okl

    currdkts mitofkdl `rmg C\s okl P\s+Qrmvfld goxfgug `bdxfifbfty fk ld`fkfkn rdboyfkn bmnfc+

    vorfmus rdboy `ukctfmks cok id gubtfpbdxdl fk o sfknbd rdboy+

    ^edk dkoibdl wfte cmggukfcotfmk `ocfbfty" octs os ok Fktdbbfndkt

    Dbdctrmkfc Ldvfcd %FDL&" pdr`mrgs imte cmktrmb okl prmtdctfmk

    `ukctfmkobfty

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    MPDYCTYYDK\ QYM\DC\FMK

    @oubts" typfcobby semrt cfrcufts" bdol tm currdkts guce oimvd ted bmol currdkt" obsm

    jkmwk os fkruse mr mvdrcurrdkt+ @rmg tefs" tednroldl mvdrcurrdktsystdg" olfscrfgfkotfvd `oubt prmtdctfmk" eos iddk ldvdbmpdl+

    \efs semubl kmt id cmk`usdl wfte Mvdrbmol prmtdctfmk" wefce kmrgobby gojds

    usd m` rdboys teot mpdrotd fk smgd ldnrdd tm ted tedrgob copoifbfty m` ted pbokt tm

    id prmtdctdl+

    Mvdrcurrdktprmtdctfmk" mk ted mtedr eokl" fs lfrdctdl dktfrdby tm ted cbdorokcd m`

    `oubts" sfkcd mvdrcurrdkt prmtdctfmk fs prfgorfby fktdkldl tm mpdrotd mkby ukldr

    `oubt cmklftfmks+ Obtemune wfte ted sdttfkns usuobby olmptdl smgd gdosurd m`

    mvdrbmol prmtdctfmk goy id mitofkdl+

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    \ed rdboy sdttfkns ord `frst ldtdrgfkdl tm nfvd ted semrtdst mpdrotfkn tfgds ot

    goxfgug `oubt bdvdbs okl tedk cedcjdl tm sdd f` mpdrotfmk wfbb obsm id

    sotfs`octmry ot ted gfkfgug `oubt currdkt dxpdctdl+

    Mvdrcurrdkt Qrmtdctfmk ceoroctdrfstfc

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    LFYDC\FMKOB MPDYCTYYDK\

    QYM\DC\FMK

    \edrd cok id sftuotfmks wedrd `mr ted purpmsd m` sdbdctfvfty: peosd oknbd fk`mrgotfmk%obwoys rdbotfvd tm o rd`drdkcd peosmr goy id rdqufrdlos fk cosd m` o rolfob

    systdg wfte smurcd ot imte dkls+

    Cmksdqudktby" `oubt fs `dl `rmg imte ted dkls m` ted `ddldr+ \m fktdrrupt ted `oubt

    currdkt" systdgs wefce eovd gubtfpbd potes tm smurcd rdqufrd rdboys ot imte dkls+

    Emwdvdr" fkstobbfkn rdboys ot imte dkls lmds kmt prmvfld o cmgpbdtd rdboyfknsmbutfmk+

    @rmg ted gonkftuld m` ted currdkt sddk iy ted rdboy Y9" ft fs kmt pmssfibd tm

    lfstfknufse wedtedr ted `oubt fs fk ted sdctfmk OI mr IC+

    Sfkcd `oubts fk sdctfmk OI ord kmt fk fts hurfslfctfmk" ft semubl kmt trfp+ \m mitofk

    sdbdctfvfty" o lfrdctfmkob mvdrcurrdkt rdboy fs rdqufrdl+

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    LFSCYFGFKO\FMK QYFKCFQBD

    \ed .lfscrfgfkotfmk prfkcfpbd. iosdl mk peosd oknbd cmgporfsmk idtwddk o sdt m`

    peosmrs" mkd m` wefce fs usdl os rd`drdkcd fs cobbdl .lfrdctfmkob lfscrfgfkotfmk

    prfkcfpbd.+

    \ed rdboy Y9 semubl mpdrotd f` `oubt fs ot @? idcousd ft fs mk prfgory `ddldr iut kmt

    idefkl f+d+ ot @9+ Ft fs oppordkt teot `mr `oubt @? currdkt F? sddk iy ted rdboy bons Ppiy 61 ldnrdds+ \efs fs ukldr ted ossugptfmk m` imbtdl `oubt okl rdoctfvd koturd m`

    cfrcuft fgpdlokcd+ Emwdvdr" wedk ted `oubt fs fk ted pmsftfmk @9" tedk rdboy currdkt

    bdols ted vmbtond Pp .+

    F` ted rdboy .ldtdcts `oubt. okl currdkt bons Pp

    "

    tedk pdrgft rdboy trfppfkn+

    F` ted rdboy .ldtdcts `oubt okl currdkt bdols Pp "

    tedk fkefift ted rdboy trfppfkn+

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    LFS\OKCD QYM\DC\FMK

    Lfstokcd Qrmtdctfmk rdboy fs ldsfnkdl tm mpdrotd mkby `mr `oubts mccurrfkn idtwddk

    ted rdboy bmcotfmk okl ted sdbdctdl rdoce pmfkt+

    Qrfkcfpbd fkvmbvds ted lfvfsfmk m` ted vmbtond ot ted rdboyfkn pmfkt iy ted gdosurdl

    currdkt+ \ed oppordkt fgpdlokcd sm cobcubotdl fs cmgpordl wfte ted rdoce pmfkt

    fgpdlokcd+

    \ed ukldrbyfkn `octmr fk lfstokcd rdboy fs teot ted oppordkt fgpdlokcd idtwddk ted

    rdboy okl ted rdoce pmfkt" sddk iy ted rdboy" wefce fs ld`fkdl os ted rotfm m` peosd

    vmbtond tm bfkd currdkt m` o troksgfssfmk bfkd %Xopp" rdlucds lrostfcobby fk ted

    prdsdkcd m` o bfkd `oubt+

    \ed rotfm m`Xopp- Xoctuobobsm fklfcotds ted lfstokcd m` ted `oubt `rmg ted rdboy+

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    CEMFCD ID\^DDK FGQDLOKCD" YDOC\OKCD" MY GEM

    @mrvdry semrt bfkds" ted Ydoctokcd typd fs prd`drrdl `mr ted rdosmk teot gmrd m`

    ted bfkd cok id prmtdctdl ot efne spddl+ \efs fs idcousd ted rdoctokcd rdboy fs

    proctfcobby uko``dctdl iy rdsfstokcd wefce goy id bornd cmgpordl wfte ted bfkd

    fgpdlokcd+

    \ed Gem typd fs idst suftdl `mr peosd'`oubt rdboyfkn `mrbmkndr bfkds" okl

    portfcuborby wedrd sdvdrd sykcermkfzfkn'pmwdr surnds goy mccur+ Ft cmgifkds

    imte ted lfrdctfmkob okl ted lfstokcd gdosurfkn ukctfmks fk mkd ukft" gojfkn ft

    gmrd rdbfoibd+

    \ed Fgpdlokcd Ydboy fs idttdr suftdl `mr peosd'`oubt rdboyfkn `mr bfkds m`

    gmldrotd bdknte+ Orcs o``dct ok fgpdlokcd rdboy gmrd teok o rdoctokcd rdboy iut

    bdss teok o gem rdboy+ Sykcermkfzfkn'pmwdr surnds o``dct ok fgpdlokcd rdboy bdss

    teok o rdoctokcd rdboy iut gmrd teok o gem rdboy+

    Octuobby" tedrd fs ok mvdrboppfkn idtwddk ordos m` oppbfcotfmk m` mkd mr okmtedrtypd m` lfstokcd rdboys+ Obsm" ceoknds fk systdgs" suce os ted ollftfmk m` tdrgfkobs

    tm o bfkd" cok ceoknd ted typd m` rdboy idst suftdl tm o portfcubor bmcotfmk+

    Edkcd" tm rdobfzd ted `ubbdst copoifbftfds m` lfstokcd rdboyfkn" mkd semubl usd ted

    typd idst suftdl `mr doce oppbfcotfmk+

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    LF@@DYDK\FOB QYM\DC\FMK

    Qrfkcfpbd8 Lf``drdktfob prmtdctfmk fs iosdl mk ted `oct teot oky `oubt wftefk ok

    dbdctrfcob dqufpgdkt wmubl cousd ted currdkt dktdrfkn ft" tm id lf``drdkt" `rmg ted

    currdkt bdovfkn ft+ \eus iy cmgporfkn ted twm currdkts dftedr fk gonkftuld mr fkpeosd mr imte wd cok ldtdrgfkd o `oubt okl fssud o trfp ldcfsfmk f` ted lf``drdkcd

    dxcddls o prdldtdrgfkdl sdt vobud+

    Obtemune ted currdkts F? okl F9 goyid lf``drdkt" imte sdts m` C\s eovd opprmprfotd

    rotfms okl cmkkdctfmks+ Tkldr kmrgob bmol cmklftfmks mr wedk tedrd fs o `oubt

    mutsfld ted prmtdctfmk zmkd m` ted dbdgdkt" ted sdcmklory currdkts wfbb cfrcubotdidtwddk ted twm C\s okl wfbb kmt `bmw termune ted mvdrcurrdkt rdboy+

    Iut f` o `oubt mccurs fk ted sdctfmk idtwddk ted twm C\s ted `oubt currdkt wmubl

    `bmw tmworls ted semrt'cfrcuft `rmg imte sflds okl ted sug m` ted sdcmklory

    currdkts wmubl `bmw termune ted lf``drdktfob rdboy+

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    YDPDYSD QM^DY YDBOV Lfstrfiutfmk systdgs ord usuobby rolfob fk koturd+ F` tedrd fs o `oubt mk ted utfbfty.s

    lfstrfiutfmk systdg" ft goy trfp o irdojdr tedrdiy fsmbotfkn pbokt `rmg ted nrfl+\efs pbokt goy stfbb rdgofk cmkkdctdl wfte lmwkstrdog bmols+ Cmksdqudktby"

    pmwdr wfbb `bmw `rmg ted pbokt ndkdrotmr tm tedsd bmols+

    F` fk ted prd'`oubt stotd" pmwdr wos idfkn `dl tm ted pbokt" tedk tefs rdvdrsob m`pmwdr `bmw cok id usdl tm fsbokl ted pbokt ndkdrotfmk okl bmol rmg tedrdgofkfkn systdg+ \efs opprmoce fs usd`ub tm ldtdct bmss m` nrfl suppby wedkdvdrted lf``drdkcd idtwddk bmol okl ovofboibd ndkdrotfmk fs kmt su``fcfdkt tm mitofk okopprdcfoibd rotd m` ceoknd m` `rdqudkcy iut ted octfvd pmwdr cmktfkuds tm `bmw

    fktm ted nrfl tm `ddl ted dxtdrkob bmols+

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    YDBOV CMMYLFKO\FMK \FGD NYOLFKN

    Qrmtdctfmk systdgs fk succdssfvd zmkds mpdrotd fk tfgds teot ord nroldl termune

    ted sdqudkcd m` dqufpgdkts" sm teot upmk ted mccurrdkcd m` o `oubt" obtemune o

    kugidr m` prmtdctfmk dqufpgdkts cok rdspmkl" mkby temsd rdbdvokt tm ted `oubtyzmkd cmgpbdtd ted trfppfkn `ukctfmk+ \ed mtedrs gojd fkcmgpbdtd mpdrotfmks okl

    tedk rdsdt+

    Ogmkn ted vorfmus pmssfibd gdtemls usdl tm ocefdvd cmrrdct rdboy cm'mrlfkotfmk

    ord temsd usfkn dftedr tfgd mr mvdrcurrdkt" mr o cmgifkotfmk m` imte+ \ed

    cmggmk ofg m` obb terdd gdtemls fs tm nfvd cmrrdct lfscrfgfkotfmk+

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    ?+ LFSCYFGFKO\FMK IV \FGD

    Fk tefs gdteml" ok opprmprfotd tfgd sdttfkn fs nfvdk tm doce m` ted rdboyscmktrmbbfkn ted cfrcuft irdojdrs fk o pmwdr systdg tm dksurd teot ted irdojdr

    kdordst tm ted `oubt mpdks `frst+

    \ed tfgd ldboy dbdgdkt prmvflds ted gdoks m` lfscrfgfkotfmk+

    Doce prmtdctfmk ukft cmgprfsds o ld`fkftd'tfgd ldboy mvdrcurrdkt rdboy fk wefceted mpdrotfmk m` ted currdkt sdksftfvd dbdgdkt sfgpby fkftfotds ted tfgd ldboydbdgdkt+ Qrmvfldl ted sdttfkn m` tefs dbdgdkt fs idbmw ted `oubt currdkt vobud"

    tefs dbdgdkt pboys km port fk ted ocefdvdgdkt m` lfscrfgfkotfmk+

    @mr tefs rdosmk" ted rdboy fs smgdtfgds ldscrfidl os ok fkldpdkldkt ld`fkftd'tfgd ldboy rdboy" sfkcd fts mpdrotfkn tfgd fs `mr proctfcob purpmsds fkldpdkldktm` ted bdvdb m` mvdrcurrdkt+

    \ed gofk lfsolvoktond m` tefs gdteml m` lfscrfgfkotfmk fs teot ted bmkndst `oubtcbdorokcd tfgd mccurs `mr `oubts fk ted sdctfmk cbmsdst tm ted pmwdr smurcd" wedrdted `oubt bdvdb %GPO fs efnedst+

    \edsd scedgds ord oppbfdl tm bmw vmbtond systdgs os ok fktdnrob port m`ted cfrcuft'irdojdr wedrd ft wmubl id ukdcmkmgfcob tm prmvfld prmtdctfmkrdboys+

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    9+ LFSCYFGFKO\FMK IV CTYYDK\

    Lfscrfgfkotfmk iy currdkt rdbfds mk ted `oct teot ted `oubt currdkt vorfds wfte ted

    Qmsftfmk m` ted @oubt idcousd m` ted lf``drdkcd fk fgpdlokcd vobuds idtwddk ted

    smurcd okl ted `oubt+ Edkcd" typfcobby" ted rdboys cmktrmbbfkn ted vorfmus cfrcuftirdojdrs ord sdt tm mpdrotd ot suftoiby topdrdl vobuds m` currdkt suce teot mkby

    ted rdboy kdordst tm ted `oubt trfps fts irdojdr+

    Ft fs kmt proctfcob tm lfstfknufse idtwddk o `oubt idtwddk twm `oubt pmfkts

    pbocdl ot obgmst dquflfstokcd `rmg ted irdojdr" sfkcd tedfr fgpdlokcd

    wmubl id kdorby dquob+

    Obsm" `mr `oubt pmfkts mkby o `dw gdtdrs oport cmgpordl tm tedfr octuob

    lfstokcd `rmg ted irdojdr" lfscrfgfkotfmk iy currdkt fs kmt o suftoibd

    prmpmsftfmk+

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    3+ LFSCYFGFKO\FMK IV IM\E \FGD OKL

    CTYYDK\

    Ft fs idcousd m` ted bfgftotfmks fgpmsdl iy ted fkldpdkldkt usd m` dftedr tfgd mr

    currdkt cm'mrlfkotfmk teot ted fkvdrsd tfgd mvdrcurrdkt rdboy ceoroctdrfstfc eosdvmbvdl+

    ^fte tefs ceoroctdrfstfc" ted tfgd m` mpdrotfmk fs fkvdrsdby prmpmrtfmkob tm ted

    `oubt currdkt bdvdb okl ted octuob ceoroctdrfstfc fs o `ukctfmk m` imte tfgd okl

    .currdkt. sdttfkns+

    @mr o bornd vorfotfmk fk `oubt currdkt idtwddk ted twm dkls m` ted `ddldr" `ostdr

    mpdrotfkn tfgds cok id ocefdvdl iy ted rdboys kdordst tm ted smurcd" wedrd ted

    `oubt bdvdb fs ted efnedst+

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