Korba Tentative

8/19/2019 Korba Tentative

1/43

1. DA TA US ED F O R CA L CU L A T IO N S

1.1.G E N E R A T O R D ET A IL S

PARAMETER VALUERated Output 210 MW, 247MVARated Terminal voltage 15.75 kVRated Stator current 9056 ARated frequency 50HzRated power factor 0.5!"#$%Syncronou! reactance " #d 205& Tran!ient reactance" #d$ 2'.4&Su% tran!ient reactance" #d$$ 17.9&

&T ratio! for all protection! 10000(5A'T ratio for all protection! 15.75)V(110V

1.2.G E N E R A T O R T R ANS(O R ) E R * G T + D E T A IL S

,- !ide L- !ide

Rating- I )-A - I )-A

420 kV '71A 270 MVA 15.75 997A 270 MVA

-ector Grouping *+11

. Impedance 14&

1.3.UA T D ET A IL S

HV -+ LV -+

RatingV I )VA V I )VA

15.75kV

56.5'A

16 MVA 6.9 kV 1''.A

16 MVA

&T Ratio for /01T 1600(1 1600(1!T-C/-$3#-/%

. Impedance 11.5

-ector Grouping D1


2/43

1.4 L- D#-"

L/$ L- 2345) S/3 L- 645)

P/--8:

P/--8:

R ; R ;In om! 7 5) 8982:0 8948:3 In om! 7 5) 8982:; 8948:3 I


3/43

A. B E N E RA T O R P R O TE C T IO N

P R O TE C T IO N S AD O P TED F O R B E N E RA T O R ! R E B 670% M # - I P 3 / : - /

REG :08 compri!e! of te following 'rotection!

S./ P3/:-/ ? IED P#"

6 B3#/3 D-3-#" P3/:-/, 7BA

REG:08 GR'6A

2 B3#/3 L/ O E>:-#-/ , 40BA

4 B3#/3 O83 V/"#$ P3/:-/, 59BA

; B3#/3 R83 P/3 P3/:-/, '2BA

< B3#/3 L/ F/3#3+ P/3 P3/:-/, '7BA

: B3#/3 N$#-8 P# S: P3/:-/,

0 B3#/3 S#/3 O83"/#+, 50OLA!/" #"#3=%

/ B3#/3 O O S? !POLE SLIP% P3/:-/,

3 B3#/3 95& S#/3 E#3 F#" P3/:-/,

68 B3#/3 #:k? I=?+#: P3/:-/, 21BA

66 D#+ M#:- P3/:-/, 50BDMA !C O?S# - O83 C33%

62 B3#/3 /83 3: ?3/:-/ !O"

64 B3#/3 U+3 V/"#$ P3/:-/, 27BA

6; B3#/3 +3 F3: ?3/:-/.

6< BT S#+ E#3 F#" P3/:-/

6: BT O83 G> ?3/:-/


4/43

CA L CU L A T IO N S

In REG :08 'rotection IED, tere i! a facility availa%le @nown a! %a!e value for-oltage and &urrent cannel! teir ratio!. Te %a!e7rated value !etting ena%le!

te diBerence %etween te rating! of protected unit, &T or -T and te 'rotection to%e compen!ated9 Ti! facilitate! ea!ier interpretation of te di!played parameter!" i.e. -oltage, &urrent and 'ower.Once te %a!e value! a r e @ n o w n C te reading from te relay can %e directlyread a! per unit quantitie!. A reading of 0./ 1n will mean /8. of te rated voltageand a reading of 8./'n will mean /8. of te rated )-A of te macine.

P 3 / : - / : - / - R E B 670

1. B 3 # / 3 + - 3 - #" P 3 / : - / , 7 B A ! R E B 670%

#-: -$ I+=- Te %a!ic !etting define! te pic@up !etting of te diBerential protection forinternal fault!. Te lowe!t po!!i%le value !ould %e co!en to ena%le it to detectte wor!t ca!e fault!. ,owever, tere can %e !mall diBerential current duringnormal operation, wic may re!ult in tripping.

R:/==++ -$ I+=- J 0.1

IN P-:k ? R#-/ !"/?%

Te pic@up ratio !lopeF i! deci!ive for te !ta%ility of te protection duringtroug fault!. Te !lopeF !etting !ould %e low enoug to ma@e te

protection !en!itive to fault! wen load current i! flowing witout mal operatingduring troug fault!.

#-: $3#" -$ /3 BENPDIFK7B!BDP1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

I a!e688.0 -688888

0.6 9050 ARated current ofprotected generator,

Invert&T2&urr No 7 He! - N/ - Invert &T 2 curr., ye! *6+ or no

#-: ?#3#=3 $3/? -$ /3 BENPDIFK7B !BDP1% :-/

S ?? / 3 - $ : # ": " # - /

• I+U3 J 10

A! per te )acine data Su% tran!ient current in 4p !ort circuit > 390 p9u9 ,ence we are@eeping te Id unre > 689

P#3#=3 R#$ S?R:/==++ S-$

U- D:3-?-/

Operation Off 7 n - O - Operation Off 7 On

Id)in 0.8< - 6.00 0.86 0.1 ISection 6 !en!itivity, multiple of generator

Id1nre6.00 -


5/43

OpNegSeqDiff No7

- N/ -Negative SequenceDifferential Ena%le OB7On

I)inNegSeq 0.82 - 0.28 0.86 0.04 INeg9 !equence curr. Limit, a! multiple of

A+8#:+ ?#3#=3 $3/? -$ /3 BENPDIFK7B !BDP1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

EndSection6 0.28 - 6.6OperD&ia!ing Off On - O - Operation D& %ia!ing On 7

2. B 3 # / 3 L / / > :- # - / , 40 B A ! R E B 670%

&T ratio > 688887 6 28 - 890< ? #d6

> - *890< ? 0.24; p.u+ > - 8960< p.u9J6diameter > #d72

> 298< 7 2 > 6982< p9u#oB!etJ2 > - 89< ? #d6

> - *89< ? 8.24; p.u+ > - 89660 p.u9J2diameter > #d

> 298< > 298< p9u

A! per te a%ove mentioned !ettingC #d$72 #d > 89660298< >296:0 p9uM > 67J > 6 7 296:0 > 89;:6; p9u.

In term! of )-AR > 89;:6; ? 2;0 > -66493/ )-AR9 890 8960692 p9uM > 67J > 6 7 692 > 89/444 p9u.In term! of )-AR > 89/444 ? 2;0 > -28 /8)-AR9A! we ave given te oB!etC A! te ) increa!e! te operating )-R will increa!e!9


6/43

#-: $3#" S-$ /3 LE;PDISK40 !UE;1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

I a!e 0.6 " 33333.3 0.6 9050 Aa!e &urrent *primary pa!ecurrent in Ampere!+

1a!e 0.6 - 3333.3 0.6 15.75 @-a!e -oltage *primary pa!etopa!e voltage in @-+

)ea!ure )ode'o!Seq L6L27 L2L47 L4L6

- P/S -)ea!uring mode *'o!SeqCL6L2C L2L4C L4L6+

#-: ?#3#=3 $3/? S-$ /3 LE;PDISK40 !UE;1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Operation Off 7 On - O - Operation Off 7 On

OperationJ6 Off 7 On - O - Operation OB7On one J6#oB!etJ6

6888.00 -6888.00

0.86 17.5 .OB!et of J6 circle top pointalong # ai! in . of J%a!e

J6diameter 0.86 " 2888.00 0.86 102.5 .Diameter of impedancecircle for J6 in . of J%a!e

tJ6 0.00 " :888.00 0.86 0.1 S Trip time delay for J6

OperationJ2 Off 7 On - O - Operation OB7On one J2

#oB!etJ26888.00 -6888.00

0.86 11.7& .OB!et of J2 circle top pointalong # ai! in . of J%a!e

J2diameter 0.86 " 2888.00 0.86 205& .Diameter of impedancecircle for J2 in . of J%a!e

tJ2 0.00 " :888.00 0.86 10 S Trip time delay for J2

A+8#:+ $3#" -$ /3 LE;PDISK40 !UE;1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

invert&Tcurren No7He! - N/ - Invert &T current

A+8#:+ ?#3#=3 $3/? -$ /3 LE;PDISK40 !UE;1% :-/

P#3#=3 R#$ S?R:/==

++U- D:3-?-/

DirSupervOf f

- O -Operation OB7On foradditional directional

#oB!etDirLine6888.00 -4888.00

0.86 0.00 .OB!et of directional line along #ai! in

DirAngle 6/8.0 - 6/8.0

0.6 1'.0 DegAngle %etween directionalline and R ai! in degree!

N/:-#-/ - "/ /?3#-$ :#3#:3--: - / - #+

-/ +3 8/"#$40B - +3 8/"#$ -$ 70& / U , 27B ---# :"# A3-??-$ -==+-#" ! T?-:#" 100= T-= +"# / #+++ / #8/-+= 3#-. !


7/43

P#3#=3 $3/? -$ /3 T-=3 S !TS01% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

OperationOffOn

- O - Operation OB7On

T 0.000 - 0.886 2 S Delay for !etta%le timer n

N / T-=3 !TS01% # + /3 L/ / >:-#-/ ?3/:-/ -/+3 8/"#$.T3=-#" U+3 8/"#$ !70&V/=% /"+ ANDED - UE; /3 # -= +"#/ 0.1 :. !F/3


8/43

OperationStep2 Off On - O - Ena%le eecution of !tep 2

&aracteri!tic2

Definitetime Inver!ecurve A

Inver!ecurve Inver!e

- D--

-=

-Selection of time delay

curve type for !tep 2

Op)ode26 out of 4 7 2out of 4 7 4 outof 4

- 1 / / ' -Num%er of pa!e!required for op *6 of 4C 2

12P 6 " 288 6 140 .1-oltage !etting7!tart val*DT ID)T+ in . of

t2 0.000 - :8.0000.006 0.100

! Definitive time delay of !tep

t2)in 0.000 - :8.0000.006 1.000!NA%

!)inimum operate time forinver!e curve! for !tep 2

@2 0.8< - 6.68 0.86 0.05!NA% - Time multiplier for teinver!e time delay for

,y!tA%!2 0.0 - 688.0 0.6 0.5 .1A%!olute y!tere!i! in. of 1a!e, !tep 2

4. B 3 # / 3 R 8 3 ? / 3 P 3 / : -/ , '2 B A ! R E B 670%

Generally for termal macine! 0.

- P/ S. -Selection of mea!uredcurrent and voltage

#-: ?#3#=3 $3/? -$ /3 BOPPDOPK'2 !BOP1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Operation Off 7 On - O - Operation Off 7 OnOp)ode6 Off 7 Overpower - O83 P/3 - Operation mode 6

'ower6 0.0 -


9/43

TripDelay2 0.868 " :888.000 0.886 15.000 ! Trip delay for !tage 2DropDelay2 0.868 " :888.000 0.886 0.060 ! Drop delay for !tage 2


10/43

A+8#:+ ?#3#=3 $3/? -$ /3 BOPPDOPK'2 !BOP1% :-/

P#3#=3 R#$ S?R:/==++ S-$

U- D:3-?-/

@ 0.00 - 0.33 0.86 0.00 -Low pa!! filter coeBicient for

power mea!urement. ' and Q,y!tere!i!l 0.2

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Ia!e 6 " 33333 6 9050 A&urrent-Reference*primary current A+

1a!e 0.8< - 2888.00 0.8< 15.75 @--oltage-Reference

*primary voltage @-+

)odeL6C L2C L4 7 Arone7 'o! Seq 7 L6L2 7L2L4

- P/ S -Selection of mea!uredcurrent and voltage

#-: ?#3#=3 $3/? -$ /3 BUPPDUPK'7 !BUP1% :-/

P#3#=3 R#$ S?R:/==++ S-$

U- D:3-?-/

Operation Off 7 On - O - Operation Off 7 OnOp)ode6 Off 7 1nder - U+3 - Operation mode 6

'ower6 0.0 -


11/43

Angle2 6/8.0 " 6/8.0 0.6 0.0 Deg Angle for !tage 2

TripDelay2 0.868 " :888.000 0.886 15.000 ! Trip delay for !tage 2DropDelay2 0.868 " :888.000 0.886 0.060 ! Drop delay for !tage 2

A+8#:+ ?#3#=3 $3/? -$ /3 BOPPDOPK'2 !BOP1% :-/

P#3#=3 R#$ S?R:/==++ S-$

U- D:3-?-/

@ 0.00 - 0.33 0.86 0.00 -Low pa!! filter coeBicient for powermea!urement. ' and Q

,y!tere!i! 0.2


12/43

N / Remaining parameter! are %y normal practice7from givendata7default value! only.

#-: ?#3#=3 $3/? -$ /3 CVBAPC !BF01% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Operation Off 7 On - O - Operation Off 7 On

&urrentInput

pa!e6 7 pa!e2 7pa!e4 7 'o!Seq 7NegSeq 7

4?JeroSeq 7 )a'7 )in' 71n%alance' 7pa!e6 pa!e2 7pa!e2pa!e47 pa!e4pa!e6 7

- N$ -Select current!ignal wic will%e mea!uredin!ide function

Ia!e 6 " 33333 6 9050 A a!e &urrent

-oltageInput

pa!e6 pa!e2pa!e4 'o!Seq-NegSeq 4?JeroSeq )a')in' 1n%alance'

pa!e6pa!e2pa!e2 pa!e4pa!e4pa!e6

- N$. -

Select voltage!ignal wic will%e mea!ured

in!ide function

1a!e 0.8< - 2888.00 0.8< 15.75 @- a!e -oltage

Oper,armRe!tr Off 7 On - O -Operation of 2ndar monic

l2nd7lfund 68.0 "


13/43


14/43

&urveTypeO&2

ANSI Et. inv. ANSI-ery inv. ANSINorm9 inv. ANSI)od9 inv9 ANSI Def . Time L. T.E.inv. L. T.-. inv. L. T9

inv. IE& Norm. inv9IE& -ery inv. IE&inv9 IE& Et. inv. IE& S. T.inv. IE& L. T. inv. IE&Def . Time

- P3/$3#==#

"

-Selection of time

delay curve type forO&2

tDefO&2 0.00 - :888.00 0.86 10!NA% !Independent*definitive+ time delay

5O&2 0.8< - 333.00 0.86 4.6 -

Time multiplier forte dependent timedelay for O&2

t)inO&2 0.00 - :888.00 0.86 0.05 !)inimum operatetime for IE& ID)Tcurve! for O&2

-&ntrl)odeO&2-oltage controlInput control-olt7Input control

- O -&ontrol mode forvoltage controlled

-Dep)odeO&2 Step Slope - S? --oltage dependentmode O&2 *!tepC

-Dep(actO&2 0.82 -


15/43

AO&2 0.000 - 333.000 0.886 156.25 -'arameter A for cu!tomerprogramma%le curvefor O&2

O&2 0.000 - 33.000 0.886 0.000 -'arameter for cu!tomerprogramma%le curvefor O&2

&O&2 0.000 - 6.000 0.886 0.000 -'arameter & for cu!tomerprogramma%le curvefor O&2

'RO&2 0.88< - 4.000 0.886 0.500 - 'arameter 'R for cu!tomerprogramma%le curvefor O&2

TRO&2 0.88< - :88.000 0.886 1'.500 -'arameter TR for cu!tomerprogramma%le curve for O&2

&RO&2 0.6 - 68.0 0.6 1.0 -'arameter &R for cu!tomerprogramma%le curve for O&2

N/1. A"" /3 -$ k? # +#". R -= :# +3

#+8#:+ ?#3#=3 $3/? -$ /3 CVBAPC !BF01% :-/2. S#$I # + /3 A"#3= #+ S#$-II # + /3 3-??-$.

7. B 3 # / 3 S # / 3 O 8 3" / # +, 50 O L A ! R E B 670, O " A " # 3 = %

Data from generator manufacturer " Armature winding !ort time termalrequirement! *Stator current -er!u! Time+ .Rated current of te generator > IGN > 38 IN67IN2 > 600007<Rated relay current > IN >


16/43

&aracteri!t6

ANSI Et. inv. ANSI-ery inv. ANSI Norm. inv. ANSI )od9 inv. ANSI Def . TimeL. T.E. inv. L. T.-. inv. L. T.

inv. IE& Norm. inv. IE&-ery inv. IE& inv. IE&Et9 inv. IE& S. T. inv. IE& L. T.

- IEC DT-=

-Selection of time delay curvetype for !tep 6

I6P 6 - 2


17/43

Operation Off On - O - Operation Off 7 On1a!e 0.8< - 2888.00 0.8< 15.75 @- a!e voltageStart(requency 4


18/43

1a!e 0.8< - 2888.00 0.8< 15.75 @- a!e voltageStart (requency 4


19/43

A!!uming tat (ault contri%ution from grid for fault in ;885- u! > ;85A9

Te !ort circuit power from te eternal networ@ witout in feed from te protected

Line =;885- Level > Sy!tem fault )-A

Sy!tem fault )-A > U4 ? -u! ? I %u! fault > 69042 ? ;8 ? ;88 > 20062 )-A

Sy!temimpedance >

kV2

>6


20/43

a!e Impedance, J%a!e *6


21/43

Trip angle > 38 deg9

A! te Trip angle increa!e!C Jr i9e9 widt of te len! decrea!e! and te JR come! toward! teElectrical centre9 *ere EG and ES are 6/8deg out of pa!e+ and angular !eparation %etween

generator and !y!tem will increa!e wic re!ult! for te & to %rea@ at very ig voltage So in !afety we are ta@ing te trip angle a! 38deg9

#-: $3#" -$ /3 PSPPPAMK7 !PSP1% :-/

P#3#=3 R#$ S?R:/==++ S-$

U- D:3-?-/

I a!e 0.6 - 33333.3 0.6 9050 Aa!e &urrent *primary pa!ecurrent in Ampere!+

1a!e 0.6 - 3333.3 0.6 15.75 @-a!e -oltage *primary pa!etopa!e voltage in @-+

)ea!ure )ode'o!SeqL6L2L2L4

- P/S -)ea!uring mode *'o!SeqCL6L2C 2L4C L4L6+

Invert&Tcurr No7 He! - N/ - Invert current direction

#-: ?#3#=3 $3/? -$ /3 PSPPPAMK7 !PSP1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Operation OB7 On - O - Operation On 7 Off

OperationJ6 OB7 On - O - Operation Jone6 On 7 Off OperationJ2 OB7 On - O - Operation Jone2 On 7 Off ImpedanceJA 0.00 " 6888.00 0.86 1'.75 . (orward impedance in . of

ImpedanceJ 0.00 " 6888.00 0.86 2'.5 . Rever!e impedance in . of

ImpedanceJ& 0.00 " 6888.00 0.86 10.9' .Impedance of one6 limitin . of J%a!e

Angle 'i 02.00 - 38.00 0.86 5.00 Deg Angle of te !lip imped-ance

Start Angle 0.0 - 6/8.0 0.6 110 Deg Rotor angle for te !tart !ignal

Trip Angle 0.0 - 6/8.0 0.6 90.0 DegRotor angle for te trip6

and trip2 !ignal!N6Limit 6 " 28 6 1 - &ount limit for te trip6 !ignal

N2Limit 6 " 28 6 4 - &ount limit for te trip2 !ignal

Re!et Time 0.00- :8.000 0.886 25.000 ! Time witout !lip to re!et


22/43

10. B 3 # / 3 S # / 3 E# 3 # ", 64 B A ! R E B 670% !#+ / O? D"# V/"#$%

a!ed on normal practice, ti! a! %een !et for 2. -an -%n -cn

Let u! a!!ume tat !ingle pa!e to eart fault appened in !ingle pa!e

at


23/43

t1N(und 0.828 - :8.000 0.886 1 SOperation delay offundamental 1NP protection

11. B 3 # / 3 # : k ? - = ? + # : , 21 B A ! R E B 670%

26G i! connected from &T! on te neutral !ide of generator and generator 'T. 'T locationwill %e te origin on te R# diagram. 26G caracteri!tic! will %e a circle. Setting of teac@up impedance function will %e determined %y te !ort circuit reactance of te Generator Tran!former.

BT MVA )-A 208BT I=?+#: in . 6;988LineLine voltage at GT ,- !ide -,- ;28888LineLine voltage at Generator !ide -L- 6JT*W+?)-A75-X ;89/;:480


24/43

Sorte!t Line lengt > 645)9

C#2 J2>*Sorte!t line imp=;285- 7 890+


25/43

JAng'' 68 " 38 6 5 DegAngle for po!itive !equence lineimpedance for 'a!e-'a!e

JRev''0.88< -2888.000

0.886 '0!NA% om7pRever!e reac of te pa!e topa!e loop*magnitude+

t'' 0.000 " :8.000 0.886 0.6 !Delay time for operation ofpa!e to pa!e

I)inOp'' 68 " 48 6 20 .1 )inimum operation pa!e topa!e current

< O N E2 S ETT IN B S

#-: ?#3#=3 $3/? S-$ /3


26/43

12. D #+ M # : - P 3 / : - / , 50 B D M A ! R E B 670%


27/43

#-: ?#3#=3 $3/? -$ /3 ROV2PTOVK59N !TRV2% :-/

P#3#=3 R#$ S? R:/==++ U- D:3-?-/

&onnType'G7 ''7 'GR)S7 '' R)S

- PP - TD

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

Operation Off On - O - Operation Off 7 On1a!e 0.8< - 2888.00 0.8< 21 @- a!e voltageOperationStep Off On - O - Ena%le eecution of !tep 6

&aracteri!t6

Definite timeInver!e curve A

Inver!e curve Inver!e curve &

- D---= -

Selection of time delay

curve type for !tep 6

16P 6 " 288 6 ' .1-oltage !etting7!tart val*DT ID)T+C !tep 6 in .

T6 0.00 - :888.00 0.86 1 ! Definitive time delay of

T6)in 0.000 - :8.000 0.886 5!NA% !)inimum operate time forinver!e curve! for !tep 6

56 0.8< - 6.68 0.86 0.05!NA% - Time multiplier for teinver!e time delay for !tep

,y!tA%!6 0.0 - 688.0 0.6 0.5 .1A%!olute y!tere!i! in . of 1a!e, !tep 6

OperationStep Off On - O - Ena%le eecution of !tep 2

&aracteri!t2Definite timeInver!e curve AInver!e curve Inver!e curve &

- D---=

-Selection of time delaycurve type for !tep 2

12P 6 " 688 6 5 .1-oltage !etting7!tart val*DT ID)T+C !tep 2 in . of

t2 0.000 - :8.000 0.886 1 ! Definitive time delay of

t2)in 0.000 - :8.000 0.886 5 !)inimum operate time forinver!e curve! for !tep 2

@2 0.8< - 6.68 0.86 0.05 - Time multiplier for teinver!e time delay for !tep

,y!tA%!2 0.0 - 688.0 0.6 0.5 .1 A%!olute y!tere!i! in. of 1a!e, !tep 2


28/43

13. T / S ? U+ 3 V / " #$ P 3 / : - / , 2 7 B A ! R E B 670%! / " # " # 3 = %

#-: $3#" -$ /3 UV2PTUVK27 !TUV1% :-/

P#3#=3 R#$ S? R:/==++ U- D:3-?-/

&onnType

'N D(T''R)S 'NR)S

-PN DFT

-Group!elector forconnection

#-: ?#3#=3 $3/? -$ /3 UV2PTUVK27 !TUV1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

OperationOffOn

- O - Operation Off 7 On

1a!e 0.8< - 2888.00 0.8< 15.75 @- a!e voltage

Operation Step6OffOn

- O - Ena%le eecution of !tep6

&aracteri!t6

Definitetime Inver!ecurve AInver!e

-D-- -=

-Selection of time delaycurve type for !tep 6

Op)ode61out of 42out of 4

- 1 / / ' -Num%er of pa!e!required for op *6 of 4C 2of 4C 4 of 4+ from

16` 6 " 688 6 70 .1-oltage !etting7!tart val*DT ID)T+ in . of 1a!e,

t6 0.00 - :888.00 0.86 0 ! Definitive time delay of

t6)in 0.000 - :8.000 0.886 D#" !)inimum operate time forinver!e curve! for !tep 6

@6 0.8< - 6.68 0.86 D#" - Time multiplier for teinver!e time delay for !tep

Intl@Sel6Off loc@ of triploc@ all

- O -Internal *low level+%loc@ing mode, !tep 6

Intl@St-al6 6 " 688 6 20 .1-oltage !etting for internal%loc@ing in . of 1a!e,

tl@1-6 0.000 " :8.000 0.886 0.000 ! Time delay of internal*low level+ %loc@ing for

,y!tA%!6 0.0 - 688.0 0.6 0.5 .1 A%!olute y!tere!i! in. of 1a!e, !tep 6

OperationStep2OffOn

- O - Ena%le eecution of !tep

&aracteri!t2 Definite time - D-- - Selection of time delay


29/43

Inver!ecurve AInver!e

-= type for !tep 2

Op)ode21out of 42out of 4

- 1 / / ' -Num%er of pa!e!required for op *6 of 4C 2of 4C 4 of 4+ from

12` 6 - 688 6 70 .1 -oltage !etting7!tart val*DT ID)T+ in . of 1a!e,

t2 0.00 - :888.00 0.86 1.00 ! Definitive time delay of

t2)in 0.000 - :8.000 0.886 D#" !)inimum operate time forinver!e curve! for !tep 2

@2 0.8< - 6.68 0.86 D#" - Time multiplier for teinver!e time delay for !tep

Intl@Sel2Off loc@ of triploc@ all

- O -Internal *low level+%loc@ing mode, !tep 2

Intl@St-al2 6 " 688 6 20 .1-oltage !etting for internal%loc@ing in . of 1a!e,

tl@1-2 0.000 " :8.000 0.886 0.000 ! Time delay of internal*low level+ %loc@ing for

,y!tA%!2 0.0 - 688.0 0.6 0.5 .1A%!olute y!tere!i! in. of 1a!e, !tep 2

A+8#:+ ?#3#=3 $3/? -$ /3 UV2PTUVK27 !TUV1% :-/

P#3#=3 R#$ S?R:/==++

U- D:3-?-/

tRe!et6 0.000 - :8.000 0.886 0.025 Re!et time delay u!edin IE& Definite Time

Re!etType&rv6

In!tantaneou! (roentimerLinearly

- I##/

-Selection of re!et curve typefor !tep 6

tIRe!et6 0.000 - :8.000 0.886 0.025 Time delay in ID)T re!et *!+C

A&rv60.88< -288.000

0.886 1.000 -'arameter A for &u!tomerprogramma%le curve for !tep 6

&rv6 0.


30/43


31/43


32/43

1. B 3 # / 3 + - 3 - #" P 3 / : - / , 7 B !7 U M 62%

1.1.B3/? D-3-#" P3/:-/ B3/? B3#"

N/. S-$ V#" B3/?

2886 DiBerential 'rotection ON 288< Increa!eofTrip&ar.DuringStart O

F/3="# +'ic@up-alueof,igSetTripK

A! per te )acine data Su% tran!ient current in 4p !ort circuit > 390 p9u9 ,ence weare @eeping te

IDI((PP 6898.

A! per te Relay )anfacturerC IDI(( PP *67#d$+*I7INmac+

So IDI(( PP *678924;+ > ;920 *I7IN)ac+9

1.2. B3/? D-3-#" P3/:-/ B3/?ID-

N/. S-$ V#" B3/?2826 'ic@up-alueofDiBerential&urr. 0.10I(IO 282:A TIDI((PTimeDelay 0: 2846 'ic@up-alueof,igSetTrip 10 I(IO 284:A TIDI((PPTimeDelay 0.00:

1.3. B3/? D-3-#" P3/:-/ B3/? C#3#:3--:

N/. S-$ V#" B3/?28;6A Slope6ofTripping&aracteri!tic 0.25 28;2A a!e'ointforSlope6of&arac. 0.00I(IO 28;4A Slope2ofTripping&aracteri!tic 0.6 28;;A a!e'ointforSlope2of&arac. 1.5I(IO 28 89;:4< i!K

67#d > *M+? In &T 'ri 7 In Rated > 89;:4


33/43

C/33?/+-$ MVAR J 25' MVAR.

2.1B3/?U+3>:-#-/P3/:-/B3/?U+3>:-#-/

N/. S-$ V#" B3/?4886 1nderecitation'rotection ON

4866 TSortTimeDelay*&ar.1ec`+ 0.10: 4862 StateofEcitation-olt.Supervi!ion OFF 4864 Ecitation-oltageSuperv.'ic@up 2.00 V 486;A 1ndervoltage%loc@ing'ic@up 77.0 V

2.2B3/?U+3>:-#-/P3/:-/B3/?C#3#:3--:

N/. S-$ V#" B3/?4882 Su!ceptanceInter!ect&aracte 0.46'5 4884 InclinationAngleof&aracteri!ti 0 488; &aracteri!tic6TimeDelay 10.00: 488< Su!ceptanceInter!ect&aracte 0.41715

488: InclinationAngleof&aracteri!ti 90 4880 &aracteri!tic2TimeDelay 10.00: 488/ Su!ceptanceInter!ect&aracte 0.927 4883 InclinationAngleof&aracteri!ti 100 4868 &aracteri!tic4TimeDelay 0.10:

3. B 3 # / 3 O 8 3 V / " #$ P 3 / : - / , 59 B !7 U M 62%

A! per data, generator can wit!tand 0.5. of rated ) > 0.


34/43

4.1. B3/?R83P/3P3/:-/B3/?R83P/3

N/. S-$ V#" B3/?4686 Rever!e'ower'rotection ON 4682 'PRever!e'ic@up -0.5 & 4684 TimeDelayLong*witoutStop-alve+ 15.00: 468; TimeDelaySort*witStop-alve+ 2.00: 468


35/43

'ic@up !etting > /?*38 :. /? *38

GT MVA MVA 270GT Impedance: in % 14.00Line-Line voltage at GT HV side VHV 420000Line-Line voltage at Generator side VLV 15750Gen d in !ri"ar# o$" 21&V' (T)!.*+(T)+MVA/&V 0.07175

No. Settings Va!e Gro!p

1701 nalaneLoad6rotetion "N 1702 8ontino*sl#6er"issile8*rrent92 #.$ % 1703 :arning;tageTi"e*ene?ator& #.$sec 1705 Ti"e@or8ooling


36/43

GT i"!edane in !ri"ar# o$" 21&V' (T)!.*+(T)+MVA/&V 0.12B25*s Voltage' *s Volt 400000ase 9"!edane ')21&V, 5 MVA+ ( &V / MVA 1.004301B2?a*lt 8ontri*tion @ro" grid @or @a*lt in400&V *s ?a*lt 8*rrent 40000

T$e s$ort ir*it !oer @ro" t$e eEternalnetorD it$o*t in @eed @ro" t$e !rotetedLine ?a*lt MVA 400&V Level

;#ste" ?a*lt MVA F3V*s 9@a*lt/1000000

27,712.00

;#ste" 9"!edane in 21 &V in &V / MVA 0.005At (ero ;li! Gd, and at 100% ;li!, Gd. ;o, at 50% ;li!, Gd and at 0.33%;li!, G2d. As Most sli!s are eE!eriened at lo as#n$rono*s s!eeds r*nning,

!er$a!s at 1%, ;o taDe t$e val*e o@ g2d.

( 6ri"ar# in o$" ( Generator ( G d 0.23500B5

() Sec *+ () pri *+ /TR 1TR () Sec *+ () pri *+ /TR 1TR .23

( deter"ines t$e distane o@ t$e reatane line @ro" t$e origin. T$e reatane line !rovides a "enas o@ disri"ination o@ t$e !ole sli!!ing it$ing in t$e GenGT (one or int$e !oer s#ste".

( 6ri"ar# in o$" 0% o@ (T ( 0.5(T 0.1033125

(/ Sec *+ (/ pri *+ /TR 1TR (/ Sec *+ (/ pri *+ /TR 1TR

&.$24

(d @ro" origin s$o*ld e set to t$e i"!edane eteen t$e loation o@ t$e !rotetion andt$e o@@- load voltage o@ t$e e>*ivalent ir*it @or t$e entire !oer s#ste".

(d 6ri"ar# in o$" ( GT ( ;#ste" (d ) + ( GT ( ;#s 0.13(d-( !ri"ar# in o$" (d-( 0.02

(d-(c Sec *+ (d-(c pri *+ /TR 1TR (d-(c Sec *+ (d-(c pri

*+ /TR 1TR 0.5$

(a /ac!ation:

( Total )6ri"ar# in o$"+ ( ((total )!ri in o$"+ ( (

0.344

(a /ac!ation:

(a (tot2 *tan*&202

(a 0.235 (tota 0.055$&#

(a Sec *+ (a pri *+ /TR 1TR (a Sec *+ (a pri *+ /TR 1TR

&.50

po6er S6ing 7re8!enc9:

T$e !ol#gon idt$ (a is t$e "aEi"*" detetale !oer sing @re>*en#

Maim!m po6er s6ing fre8!enc9: fp fp *;


37/43


38/43

4-& Setting /ac!ation:

GT 9"!edane in 6ri"ar# o$" 21&V'

(!.* ( MVA/&V0.12B25

(1 70% o@ GT i"!edane !ri"ar# 21&V)+ (1 0.7 GT 9"! in 0.000375

(1 70% o@ GT i"!edane ;eondar# 21&V)+ ( ;e ( !ri 8TJ / 6TJ. 1.257BBB7


39/43

-2 Setting /ac!ation:

(2)Longest line !ri" i"! 420&V / 0.7)Mini"*"generation++ GT i"!. Longest line /0.7 GT

9"!edane )+220.41002

(2 21&V (2,LV (2, HV LVLV/)HVHV+

0.3051B

(2 se ( ;e ( !ri 8TJ / 6TJ. 4.32425/ase:2 (2);$ortest line i"!420&V / 0.7+ 50% o@ 98T i"! in !arallel GT i"! ;$ortest line /0.7 GT

9"!edane )+ 98T 50%

o@ 98T 9M6 in !arallel.

2.3002B1

(2 21&V (2,LV (2, HV LVLV/)HVHV+ 0.12772

(2 se ( ;e ( !ri 8TJ / 6TJ. 1.13040

(2 ;etting in ;eondar# Min)(2 in ase1,8ase2+

Min o@ 9"!edane in8ase-1 and 8ase-2.

&.3&0;03


40/43

068 2 IStage'ic@up 5A 068 4 Relea!eTre!old16` 77.0 V 068 ; 'ic@upTimeDelayT16` '.00: 068 < DropOutTimeDelayT16` 1.00:


41/43

11. B 3 # / 3 U+ 3 V / " #$ P 3 / : - / , 27 B !7 U M 62%

11.1.B3/?U+38/"#$P3/:-/B3/?U+38/"#$

N/. S-$ V#" B3/?;88 1ndervoltage'rotection ON

;88 1` 'ic@up 77.0 V ;88 T1`TimeDelay 10.00: ;88 1``'ic@up 70.0 V !NA% ;88 T1``TimeDelay 1:!NA% ;88 A 1`,1``DropOutRatio 1.05

N / S #$ I / " + : / - $ 3 + / 3 # " # 3 = # + #$ -II / "+ k ? O FF.!T 3- ? - / 3 -3 + %

12. R / / 3 E# 3 F # " P 3 / : - / , 64 F !7 U M 62%

12.1.B3/?R//3E#3F#"P3/:-/B3/?R//3E#3F"

N/. S-$ V#" B3/?:886 RotorEart(ault'rotection*R,fn+ ON

12.2. B3/?R//3E#3F#"P3/:-/!1'Hz%B3/?REF1'Hz

N/. S-$ V#" B3/?:686 RotorEart(ault'rotection*64, ON :682 'ic@up-alueofarningStageRe 25.0kO= :684 'ic@up-alueofTrippingStageRe 5.0kO= :68; TimeDelayofarningStageRe` 10.00: :68< TimeDelayofTrippingStageRe` 1.00: :68: 'ic@up-alueofopenRotor&ircuit* 0.02=A :680A Te!tingRe!i!tor '.'kO=


42/43

Generator, GT and ?T protection Setting /ac!ations, Indira Gand=i S!per T=erma 1o6er 1ant

13. F F # -" 3 S ? 3 8 - - / , 60!7 U M 6 2 %

13.1. B3/?S?38--/B3/?B3#"

N/. S-$ V#" B3/?/886 (u!e(ailure)onitor ON


43/43

/31/2010

Documents

Korba Tentative