220KV GIS SYSTEM.ppt

8/16/2019 220KV GIS SYSTEM.ppt

1/96

PRESENTATION

220kV GISfor ElectricalAuthorizatio

n

ON


2/96


3/96

PURPOSE OF 220 kV SWITCHYARD

Before Pla! Cr"!"#al"!$ %

For &ra'"( Co))"**"o"( +o'er *,++l$fro) !-e (r"&

A* a S!ar! .,+ Po'er S,++l$

To *,++l$ #o))o *!a!"o loa&

Af!er Pla! /e#o)e* O+era!"oal %

To ea#,a!e Po'er fro) !-e *!a!"o !o !-e

(r"& A* a Re*ere Po'er *,++l$ of !-e Pla!

To *,++l$ #o))o *!a!"o loa&


4/96

CONVENTIONAL SWITCHYARD

All !-e #,rre!1#arr$"( +ar!* are o+e !o a"r

D,e !o +ro+er!"e* of a"r !-e #leara#e

re3,"re& /e!'ee l"e +ar!* "* )ore4 *o *+a#ere3,"re)e! "* )ore

Lo' ""!"al #o*!

5a"!ea#e a& e6!e*"o /e#o)e* &"ff"#,l!or re3,"re* o,!a(e of a&7a#e! /a$*


5/96

GAS INSULATED SWITCHGEAR

• H"(- ol!a(e #,rre! #arr$"( +ar!* are'"!-" a )e!al e#lo*,re

• T-e *+a#e /e!'ee !-e #o&,#!or a&

e#lo*,re "* f"lle& '"!- SF8 (a* ,&er)o&era!e +re**,re

• SF8 (a* a#!* a* a "*,la!"( a& #,rre!

"!err,+!"( )e&",)

• T-e GIS a**e)/l$ "* &""&e& "!o *e+ara!e

#o)+ar!)e!* '-"#- "* f"lle& '"!- SF8 (a*


6/96

PROPERTIES OF SF8 GAS

Chemical properties:Ver$ *!a/le (a*

O&o,rle**4 #olo,rle** 4 o!o6"# a&

o"fla))a/le If fla*-oer% De#o)+o*"!"o of !-e )ole#,le

a! 900 :C – Very toxic decomposition product


7/96

Electrical properties D"ele#!r"# *!re(!-% 29 !")e* )ore !-a

a"r

–Good dielectric qualityT")e #o*!a!% ;00 !")e* )ore !-a a"r

–Quick return to the dielectric strength

Ele#!roe(a!"e (a*% Grea! aff""!$ for freeele#!ro*

–Very good ability to extinguish an arc byabsorbing electrons emitted during breaking.

PROPERTIES OF SF8 GAS


8/96

ADVANTAGE OF GIS

• I&eall$ *,"!e& for #oa*!al *"!e* -a"( *al"ea!)o*+-ere

• Pro!e#!"o fro) &,*!$ e"ro)e!al #o&"!"o*• Re*"*!a#e !o 'or*! +oll,!"o• H"(- rel"a/"l"!$ < aa"la/"l"!$

• =,"#k *"!e a**e)/l$ *"#e )o*! of !-e GISe3,"+)e! are )o&,lar &e*"(


9/96

• Safe I*!alla!"o a* all *'"!#-"( #o)+oe!* aree#lo*e& '"!-" !-e e#lo*,re*

• GIS I*!alla!"o* ee& ol$ ;>;0!- of !-e *+a#e

re3,"re& for #oe!"oal "*!alla!"o*• Lo' )a"!ea#e '-e #o)+are& '"!- a"r

"*,la!e& *'"!#-$ar& *"#e )o*! of !-e +ar!* are

e#lo*e&

ADVANTAGE OF GIS


10/96

DISADVANTAGE OF GIS

• H"(- ""!"al #o*! '-"#- "* aro,& 200?a++ro6 of a"r "*,la!e& *'"!#-$ar&4 '-"#-

a(a" "* off*e! " !-e lo(er r, '"!- lo'ero,!a(e* a& &o'!")e


11/96

GIS IN KKNPP

I&oor GIS S'"!#-$ar& for /o!- @00 < 220

kV

Oe < Half Breaker S#-e)e for @00 kV T'o 5a" B,* S#-e)e for 220 kV

Se+ara!e S'"!#-$ar& Co!rol Roo) 1 SYCR


12/96

SWITCHYARD LOCATION

• @00KV GIS "* lo#a!e& " UAB /,"l&"(• 220KV GIS "* lo#a!e& " UAD /,"l&"(• S'"!#-$ar& #o!rol roo) "* lo#a!e& " UAC

/,"l&"(• @00>220KV "!er#oe#!"( a,!o !ra*for)er*

a& *'"!#-$ar& #o!rol roo) are lo#a!e&/e!'ee 220KV a& @00KV GIS /,"l&"(*


13/96

LOCATION OF UAC AND UAD


14/96

220 kV SWITCHYARDCSAT TRANSFOR5ERS


15/96


16/96

220 kV GIS

• T$+e of S'"!#-$ar& %GIS4 I&oor • No of Ba$* % /a$*• T$+e of &"ele#!r"# )e&",)%SF8 Ga*

• T$+e of *#-e)e %T'o 5a" B,* Ra!e&Vol!a(e %220 kV

• C,rre! Ra!"( %2000 A

• S-or! C"r#,"! Ra!"( %@0 kA


17/96

SWITCHING SCHE5E IN 220 kV GIS

TWO 5AIN BUS SCHE5E proidesmaintenance o! bus bars and other

equipment connected to it "ith dueoutage.


18/96

#"o main bus scheme


19/96

ADVANTAGES OF TWO 5AIN BUS

SCHE5E

• Le** o of Breaker* < I*ola!or*#o)+are& !o Oe < Half CB S#-e)e

• Le**er o of S'"!#-"( O+era!"o* &,e!o le** CB*>I*ola!or*

• Le** 5a"!ea#e " "e' of le**er o

of E3+!>S'"!#-"( o+era!"o*• Le** Co*!l"er !-a Oe < Half CB

S#-e)e


20/96

DISADVANTAGES OF TWO 5AIN

BUS SCHE5E

• All !-e C"r#,"!* #oe#!e& !o !-e+ar!"#,lar /,* -ae !o /e !r"++e& "

#a*e of B,* fa,l!4 '-"#- re*,l!* "

!e)+orar$ o,!a(e !"ll !-e l"e* are!ra*ferre& !o !-e -eal!-$ /,*

• Ho'eer4 B,* Fa,l! "* #o*"&ere& !o /e

rare < !-erefore "! "* a&o+!e& for 220 kVS'"!#-$ar&


21/96

220kV GIS BAYS

;0AD=0 1UNIT; RAT BAY

ADL; 1TUTICORIN LINE BAY

00 AD=0; 1 CSAT BAY

ADL;9 1 SRPUDUR LINE BAYAD=0 1 BUS COUPLER BAY

20AD=0 1 UNIT2 RAT BAY

ADL;@ 1 SPARE LINE BAY

AD=;0 1 ICT; BAY

AD=20 1 ICT2 BAY


22/96

220KV GIS CO5PONENTS

220KV C"r#,"! Breaker 220KV D"*#oe#!or* 220KV C,rre! !ra*for)er* 220KV Vol!a(e Tra*for)er*

220KV S,r(e Arre*!er* 220KV Ear!-"( S'"!#- H"(- *+ee& for l"e* 220KV SF8 a"r B,*-"( For l"e* ol$

220kV SF8 O"l B,*-"( For !ra*for)er* ol$

Al,)"",) E#lo*,re B,* Bar Har&'are #a/"e!* I*"&e 0 UAD Pro!e#!"o a& "!er+o*"( +ael* 0 UAC Co!rol Pael*


23/96

$utdoor equipments

%ightning arrestor Capacitor oltage trans!ormer

&ae trap'ost insulator


24/96

CIRCUIT BREAKER

• CB -a* !-ree *e+ara!e +ole* ea#- -a"( a*e+ara!e "!err,+!"( ,"!

• I!err,+!er ,*e !-e P,ffer /reak"(!e#-"3,e " '-"#- !-e o+era!"o of CB+re**,r"e* !-e SF8 (a*

• CB o+era!"o !-ro,(- H$&ra,l"# o+era!"()e#-a"*) '-"#- &r"e* !-e )o"( +ar!of CB " e"!-er &"re#!"o

( i!i ti ! i it


25/96

(peci!ications o! circuitbreaker

• )ated normal current: *+++,• )ated short time-s/ "ithstand current : 0+1,• (23 pressure -kg!4cm*/ -at *+ 5C/:

6 7aximum: 8.96 )ated 'ressure: 8.86 ,larm 'ressure: 8.06 %ock out 'ressure: 8.+

• (23 leakage per year not more than: ;< o! mass• 7ake time not more than: ;++ m sec

• =reak time not more than: 8 m sec• #otal break time not more than: 88m sec• Cycle: $>+.s>C$>;9+s>C$

Ci it b k ith


26/96

Circuit breaker "ithdismantling unit


27/96

5OVING ARCING CONTACT

5OVING 5AIN CONTACT

STATIONARY ARCING

CONTACT

STATIONARY 5AIN CONTACT

?@#E))A'#E)A@?#

OPEN POSITION CLOSED POSITION

' !!i !! t


28/96

'u!!ing e!!ect


29/96

Circuit breaker

C?)CA?#=)E,1E)

BD),A%?CD)?VE

C.#


30/96

Bydraulic drie

• Bydraulic drie is used to actuate thecircuit breaker.

• $il is used in hydraulic drie• (pring is used in drie to store the energy

• $perating pressure is *08 kg!4cm*


31/96

Bydraulic drie

• Electromechanical trael controller isproided "ith limit s"itches "hich "illoperate according to pressure in essel to

cut in4o!! o! the pumps


32/96

'ositions in controller

'ositions 'ressure ?nterlock; + @o operation

* *+0 $pening lockout

*;0 Closing lock out

0 *0 ,larm pressure

8 *0+ 'ump $@F

3 *08 'ump $22F *0 $erpressure relie!


33/96

Bydraulic drie

close4$pen indicator

$il manometer

pump motor unit

2ilter

E.7.#.Controller

,ux. s"itch

=ye pass ale

Disc (pring assembly


34/96

Bydraulic drie

Closingsolenoid

#ripping solenoid ;

#ripping solenoid *

)e directing ale unit

2ilter


35/96

#rael controller


36/96

Bydraulic drie


37/96

Bydraulic drie

• $peration: 'ump takes suction !romreseroir through !ilter and discharges totop portion o! the po"er unit through a

@)V. "hen oil is pressuriHed the springportion "ill elongate and the system "illbe charged. #here are closing and tripping

ales are proided and they "ill beactuated by closing and tripping solenoids.


38/96

DISCONNECTOR

• I! "* OFF loa& &e"#e Ba*"#all$ )ea!for &"*#oe#!"o ,&er o1loa&#o&"!"o

• Al'a$* +ro"&e& o e"!-er *"&e* ofC"r#,"! Breaker for I*ola!"o +,r+o*e

• Po*"!"o "&"#a!or "* +ro"&e& for

"&"#a!"( !-e o+e> #lo*e +o*"!"o* of&"*#oe#!or


39/96

(peci!ications o! disconnector

• )ated normal current: *+++,• )ated short time-s/ "ithstand current: 0+ k,

• (23 pressure -kg4cm*/ -at *+ 5C/:

– 7aximum: 0. – ?nsulating gas -(23/ density decrease alarm: .9 – Emergency decrease o! ?nsulating gas -(23/ density

alarm : .8

• (23 leakage per year not more than: ;< o! mass• 7ake time not more than: 8 sec• =reak time not more than: sec


40/96

=us side disconnetor

=us ; D(

=us * D(

Connecting sha!t

Drie


41/96

#op ie" o! =us Disconnectors


42/96

%ine side Disconnector

D( drie

Earth s"itch


43/96

Disconnector internals


44/96

Disconnector

• Disconnector "ill be haing one common;ph motor drie box !or all three poles. ?ndrie box rack and pinion arrangement is

proided. Connecting sha!t connects theindiidual pole "ith common drie. 2romdrie box manual operation by handle is

possible. &hen Bandle is put electricaloperation !rom bay controller is prohibitedby Disconnector interlock circuits.


45/96


46/96

CURRENT TRANSFOR5ER

• 5ea! for *!e++"( &o' !-e #,rre!for )ea*,re)e! < +ro!e#!"o

• Pr")ar$ '"&"( "* !-e )a" #o&,#!or

• CT *e#o&ar$ '"&"(* are "*!alle&aro,& !-e e#lo*,re

• Se+ara!e CT* ,*e& for +ro!e#!"o a&5e!er"( +,r+o*e


47/96

(peci!ications o! C#

• )ated primary current: 7easuring C#:;+++, 'rotection C#: ;+++,

• )ated secondary current: ;,

• )ated short time-s/ "ithstand current: 0+1,• (23 pressure -kg4cm*/ -at *+ 5C/:

– 7aximum: 0. – ?nsulating gas -(23/ density decrease alarm: .9 – Emergency decrease o! ?nsulating gas -(23/ density

alarm : .8 • (23 leakage per year not more than: ;< o! mass• 7easuring C# class: +.*• 'rotection C# class : #'(


48/96

Current trans!ormer

• =us bar acts as a primary o! the currenttrans!ormer.

• &ound secondary is mounted on the duct.

• =et"een bus to circuit breaker one C.# isproided "ith t"o secondaries.- one ismeasuring and other is #'(/

• =et"een C.= to load side one C.# isproided "ith t"o secondaries.- both are#'( /


49/96

Dismantling unit

• Dismantling unit proides a clearance inbay so that dismantling o! G?( equipmentsis possible "ithout disturbing the "hole

bay equipments.


50/96

VOLTAGE TRANSFOR5ER

• 5ea! for *!e++"( &o' !-e ol!a(efor )ea*,re)e! < +ro!e#!"o

• Ele#!ro)a(e!"# !$+e ol!a(e

!ra*for)er


51/96

(peci!ications o! oltage trans!ormer

• )ated primary oltage: **+4I kV• )ated secondary oltage: ;++4I V• )ated open delta "inding oltage:;++V

• (23 pressure -kg!4cm*/ -at *+ 5C/: –7aximum: 8.8 –?nsulating gas -(23/ density

decrease alarm: 8.+ –Emergency decrease o! ?nsulatinggas -(23/ density alarm : 0.+


52/96


53/96

EARTHING SWITCH

• 5ea! for &"*#-ar("( !-e ol!a(e "f a$o !-e l"e* !o ear!- for *afe!$

• Co)+r"*e* of !-ree +ole #oe#!e& !o#o))o o+era!"( )e#-a"*)

• O+!"#al +o*"!"o "&"#a!or "* +ro"&e&for "&"#a!"( !-e o+e> #lo*e +o*"!"o*

of ear!-"( *'"!#-• H"(- *+ee& ear!- *'"!#- "* +ro"&e& for!ra*)"**"o l"e fee&er


54/96

(peci!ications o! earthing s"itch

• )ated oltage: **+1V• )ated short time-s/ "ithstand current:0+k,• (23 pressure -kg!4cm*/ -at *+ 5C/:

– 7aximum: 0.

– ?nsulating gas -(23/ density decrease alarm: .9 – Emergency decrease o! ?nsulating gas -(23/ densityalarm : .8

• (23 leakage per year not more than: ;< o! mass

• 7ake time not more than: 8 sec• =reak time not more than: sec


55/96

Earth s"itch


56/96

Earth s"itch

• Earth s"itch "ill be haing one common;ph motor drie box !or all three poles. ?ndrie box rack and pinion arrangement is

proided. Connecting sha!t connects theindiidual pole "ith common drie. 2romdrie box manual operation by handle is

possible. &hen Bandle is put electricaloperation !rom bay controller is prohibitedby Earth s"itch interlock circuits.


57/96

Dr"e *$*!e) for ear!-"( *'"!#-e*


58/96

Earthing s"itch


59/96

Bigh speed earth s"itch

• &hy only !or line !eeders: %ong transmission lines hae high

capacitance. #o discharge the capacitie

charging currents the earth s"itch shouldhae enough speed to minimise the arcingtime.


60/96

(peci!ications o! B( E(

• Closing time : sec• $pening time : 8 sec• 7aking current k,:

– rms alue > 0+ – maximum peak ;++

•=reaking induced current – J:inductie :9+, – Capacitie :;*8,


61/96


62/96

Bigh (peed Earth ("itch

• Bigh speed earth s"itch uses a DC motorto charge the spring . Bere spring is usedto store the energy.


63/96



64/96


B.(.E.(


65/96

LIGHTNING ARRESTOR

5ea! for &"er!"( !-e -"(- ol!a(e *,r(e* !oear!- a& !-ere/$ +ro!e#! "*,la!"o

Ga+ le** *,r(e arre*!or '"!- "# o6"&ere*"*!or* '"!-o,! *+ark (a+

Re*"*!or* are a**e)/le& l"ke #ell* !o o/!a"-"(- eer($ a/*or+!"o

A ")+,l*e #o,!er re#or&* !-e ,)/er of

!")e* -"(- #,rre! +a** !-ro,(- !-e#o&,#!or a& !-e )a6"),) a)+l"!,&ea!!a"e&


66/96

(urge arrestor

(23 gas to air bushing


67/96

g g

11ConnectionConnection

terminalterminal

22 CoronaCorona

ringring

33 Top fange Top fange

44 Top Top

spacerspacer

ConductiveConductive

barbar

!! InsulatorInsulator"" DielectricDielectric

shieldshield

## InsulatorInsulator

xingxing

boltsbolts


68/96

GIS TER5INATIONS

CONNECTION TO OVER HEAD LINE

T-ro,(- SF8 B,*-"( '-ere B,*-"(* f"lle& '"!- SF8(a*

B,*-"(* are )a&e of Por#ela" "*,la!or*

• CONNECTION TO TRANSFOR5ER

Ga* !"(-! SF8 . O"l B,*-"( '-"#- *e+ara!e* !-eTra*for)er o"l fro) !-e SF8 Ga*

B,*-"(* are )a&e of Por#ela" "*,la!or*


69/96

BUSBAR

• Var"o,* I#o)"( < O,! (o"( C"r#,"!* are#oe#!e& !o B,* Bar*

• T,/,lar S-a+e Al,)",) '"!- -"(- (ra&e*"ler +la!e& #o++er #o!a#!* a! !-e e&*

• Co!a#!* are of *l"&"( !$+e4 '-"#- allo'*e6+a*"o '"!-o,! !ra*)"!!"( !-e)e#-a"#al *!re**e* !o *,++or!"( "*,la!or*

• Bello'* are +ro"&e& !o #o)+e*a!e !-e!-er)al e6+a*"o


70/96

=us =ar speci!ications

• )ated oltage: **+1V• )ated normal current: *+++,• )ated short time-s/ "ithstand current: 0+1,•

(23 pressure -kg4cm*/ in bus duct K*+ deg C: – 7aximum: 0. – ?nsulating gas -(23/ density decrease alarm: .9 – Emergency decrease o! ?nsulating gas -(23/ density

alarm : .8

• (23 leakage per year not more than: ;< o! mass


71/96

=us expansion bello"

= b ith i b ll


72/96

=us bar "ith expansion bello"


73/96

(23 G,( (A'E)V?(?$@

• T-e (a* ,*e& !o f"ll ea#- #o)+ar!)e! "*)o"!ore& a! all !")e* /$ a &e*"!$*'"!#- f"!!e& '"!- a "&"#a!or4 a"&"#a!or #o!a#! a& a alar) #o!a#!

• T-e &e*"!$ *'"!#- -a* !'o )o"!or"(!-re*-ol&*% ;*! leel alar)% T-e *"(al "* !rea!e& a*

"for)a!"o T-e fall " &e*"!$ "*a##e+!a/le T-e #o)+ar!)e! re!a"* all

"!* ele#!r"#al a& "*,la!"(#-ara#!er"*!"#* T-e (a* leel *-o,l& /e!o++e& ,+


74/96

2n% le&el alar'(2n% le&el alar'( The fall in %en)it* i) notThe fall in %en)it* i) notacce+ta,le- The co'+art'ent) no lon.eracce+ta,le- The co'+art'ent) no lon.er

retain) all it) electrical an% in)ulatin.retain) all it) electrical an% in)ulatin.

characteri)tic)- /e+en%in. on thecharacteri)tic)- /e+en%in. on the

o+eratin. lo.ic u)e% lockin. or )itchin.o+eratin. lo.ic u)e% lockin. or )itchin.can ,e initiate% auto'aticall*can ,e initiate% auto'aticall*.. The The

equipment should not be subected to an!equipment should not be subected to an!

operation at this pressure.operation at this pressure.

Density s"itch


75/96

y


76/96

(urge arrestor

• (urge arrestor is used to dischargeany lightning impulse !rom line toground.

• %, are connected "ith %,>counter tokno" the leakage through %, andnumber o! operations.

Capacitor oltage trans!ormer -CV#/


77/96

Capacitor oltage trans!ormer -CV#/

• CV# is used !or 'o"er line carriercommunication -'%CC/

• CV# is used as a instrument trans!ormer

to kno" the line oltage.


78/96

&ae trap

• &ae trap is a combination o! capacitorand inductor circuit.

• preents the high !requency

communication signal entering in to theG?( there by protecting all systems.

5o"!or"( a& #o!rol of GIS /a$*


79/96

5o"!or"( a& #o!rol of GIS /a$*

Har& 'are #a/"e!%

• T-e Lo#al Har&'are Ca/"e! of ea#-GIS /a$ -a* follo'"( )a" f,#!"o*

E3,"+)e! #o!rolSF8 Ga* De*"!$ 5o"!or"( E3,"+)e!

Ele#!r"#al I!erlo#k"( /e!'ee !-e &e"#e*

I!erfa#e /e!'ee !-e GIS e3,"+)e!* a&Co!rol Roo)

B d bi


80/96

Bard"are cabinet

%4) selection s"itch

C= $@4$22 s"itch

'ump $@4$22s"itch

D( $@4$22 s"itch

C= indiction

E( $@4$22 s"itch

B d bi t


81/96

Bard "are cabinets

,larms


82/96

SWITCHYARD CONTROL ROO5

Co!rol of Tra*)"**"o l"e* '"llel")"a!e !-e /,r&e of l"e #o!rolfro) )a" +la! o+era!"o*

Se+ara!e Co!rol Roo) for #o!rol of@00 kV < 220 kV S'"!#-(ear*

Co*"&era/le *a"(* o #a/l"( #o*!

" "e' of !-e #lo*e +ro6")"!$ ofS'"!#-$ar& < SYCR

**+kV G?( t ti

http://protections_r01%20kk%200%20uac%200%20ae%20ok%20wd002_003%3D1.dwg/http://protections_r01%20kk%200%20uac%200%20ae%20ok%20wd002_003%3D1.dwg/


83/96

**+kV G?( protections

• =us bar di!!erential protection

' t ti t

http://protections_r01%20kk%200%20uac%200%20ae%20ok%20wd002_003%3D1.dwg/http://protections_r01%20kk%200%20uac%200%20ae%20ok%20wd002_003%3D1.dwg/


84/96

'rotections cont.

**+kV #ransmission line protections 7ain ;:;. Distance protection *;7;-)E%8*;/*. Carrier trip

7ain *:;. Distance protection *;7* -'00*/*. =reaker !ailure protection 8+%== -),?C,/

. Carrier trip

),# t ti


85/96

),# protections

• I/,"l! +ro!e#!"o*% #rans!ormer gas protection -3/ $%#C gas protection -;/

&inding temperature Bigh $il temperature Bigh $%#C oil leel lo"

),#4C(,# t ti


86/96

),#4C(,# protections

• &ired protections: #rans!ormer Di!!erential protection -9#/ )estricted earth !ault protection !or BV -9 @/

$er !luxing protection -LL/ Earth !ault protection !or %V -8;@/ Distance protection !rom 3kV side -*;/ ,rc protection -8+,'/

?C# t ti


87/96

?C# protections

• #rans!ormer di!!erential protection-9#/• #rans!ormer =us duct protection -9=D/• $er !luxing protection -LL/• Distance protection -*;/• Directional oer current protection !or

@eutral -3@/

7ain steps !or line isolation


88/96

7ain steps !or line isolation

• Get clearance !rom %oad dispatch center • #ake permit to isolate• ?n!orm to the other end• ("itch $22F the respectie bay C=

• $pen the bus side disconnector -G(;++4*++/• $pen the line side disconnector-G(++/• Con!irm the line is dead !rom other end• Close the high speed earth s"itch -GV+*/• Close the circuit breaker earth s"itches i! required

-GV++;4GV+;/• ("itch $22F ,.C and D.C supplies to the respectie

Bard"are cabinet .

7ain steps to normalise the line


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7ain steps to normalise the line

• Get clearance !rom %oad dispatch center • Get permit• ("itch $@F ,.C and D.C po"er supplies to the

respectie hard"are cabinet• Ensure no alarm is existing in B4& cabinet and

Control room•

$pen the C= earth s"itches -GV++;4GV+;/• $pen the line side earth s"itch -GV+*/• Charge the line !rom remote end -G)?D/

7ain steps to normalise cont


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7ain steps to normalise cont.

• Ensure the line charging !rom CV#• Close the bus side Disconnector -G(;++

or G(*++/

• Close the line side Disconnector -G(++/• Do synchronism check•

Close the respectie circuit breaker.

7ain steps to isolate trans!ormer bays


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7ain steps to isolate trans!ormer bays

• #ake permit to isolate• ("itch $22F and isolate do"nstream C=s o! the

respectie trans!ormer -2or ),# and C(,# – 3kV C=sand !or ?C#s 0++kV C=s/

• ("itch $22F the respectie bay **+kV C=• $pen the bus side disconnector -G(;++4*++/• $pen the trans!ormer side disconnector-G(++/• Close the trans!ormer side earth s"itch -GV+*/• Close the circuit breaker earth s"itches i! required

-GV++;4GV+;/• ("itch $22F ,.C and D.C supplies to the respectieBard"are cabinet .

(teps to normalise #rans!ormer bay


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p y

• Get permit• ("itch $@F ,.C and D.C po"er supplies to the

respectie hard"are cabinet• Ensure no alarm is existing in B4& cabinet and

Control room• Ensure 3kV breakers are in open position.• $pen the C= earth s"itches -GV++;4GV+;/

• $pen the #rans!ormer side earth s"itch -GV+*/

(teps to normalise #rans!ormer bay


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p y

• Close the bus side Disconnector -G(;++or G(*++/

• Close the #rans!ormer side Disconnector

-G(++/• Do synchronism check i! it is ?C# bay

-considering 0++kV C= is already closed/.

• Close the respectie circuit breaker.• Close the do"nstream circuit breaker .

%ogics in **+kV G?(


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%ogics in **+kV G?(

• ?nterlock o! =us side Disconnector• ?nterlocks o! line side Disconnector • ?nterlocks o! C= Earth s"itch• ?nterlocks o! line Earth s"itch• ?nterlocks o! C=

TYPE OF SWITCHYARD IN OTHER

POWER STATIONS


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POWER STATIONS

• TAPS ; < 2Coa*!al % O>D Coe!"oal• RAPS ; < 2Ila& % O>D Coe!"oal

• 5APS ;< 2Coa*!al % I&oor Coe!"oal• NAPS ;


96/96

220KV GIS SYSTEM.ppt

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Transcript of 220KV GIS SYSTEM.ppt