interlock & protection handbook

8/18/2019 Interlock & Protection Handbook

1/67

Power from knowledge

Interlock & ProtectionHandbook

WPCL, Warora

KSK Energy Ventures Ltd (4 X 135 MW)

INDEX

http://www.ksk.co.in/default.htm


2/67

Sr.

No.

Description Page

no.

1 Interlock & Protection of Boiler 32 Interlock & Protection of ID fan system 4

3 Interlock & Protection of D fan system !

4 Interlock & Protection of "P# system $

% Interlock & Protection of P" fan system 13

Interlock & Protection of 'oal P(l)eriser 1%

! Interlock & Protection of 'oal ee*er 21

+ Interlock & Protection of Seal "ir an 22

$ Interlock & Protection of Scanner "ir an 23

1, Interlock of Boiler 24

11 Interlock & Protection of SSS 2%

12 Interlock test c-ecklist of steam an* ater

system

2+

13 Interlock test c-ecklist of f(el oil system 3,

14 Interlock & Protection of /(r0ine 3!

1% 'on*ensate Etraction P(mp 'EP 3+

1 'irc(lating ater system 4,

1! Boiler ee* P(mp Interlock & Protection 421+ ac((m system 4%

1$ 5(0e oil system & E# oil system 4

2, Deaerator6#P# & 5P# system 4!

21Main steam and drainage system

%,

22 Bypass system %3

2


3/67

23 /(r0ine %4

Power from knowledge

Boiler& "(iliaries

Interlock & ProtectionWPCL, Warora

KSK Energy Ventures Ltd (4 X 135 MW)

3



4/67

Interlock & Protection of ID fan systemStart permissive

Front and rear fan bearing temperature normal (


5/67

Front bearing (/ direction )ibration i% )er/ *ig*4 time dela/ # %econd% (!mm9%! ;ear bearing (7 direction )ibration i% )er/ *ig*4 time dela/ # %econd% (!mm9%! ;ear bearing (/ direction )ibration i% )er/ *ig*4 time dela/ # %econd (!mm9%! Inlet oil pre%%ure of coupler i% )er/ low4 after I1F i% running4 time dela/ 0 %econd% (


6/67

IDF inlet control damper (IGV)

Interlock conditions of opening

.ll I1F and F1F *a)e been %topped4 open damper4 time dela/ # minute%(from a%king for free )entilationInterlock conditions of closing

=*i% %ide I1F trip and t*e ot*er %ide I1F i% running4 clo%e damper IDF scoop tube

Interlock condition of closing

=*i% %ide I1F trip4 clo%e %coop tube!

Seuence start procedures

Place 'coop tube po%ition at minimum! Place inlet )ane po%ition at minimum -lo%e inlet flue ga% damper -lo%e outlet flue ga% damper 'tart I1F motor 1ela/ 0 %econd4 open outlet9inlet electric damper ;elea%e inlet )ane

Seuence stop procedure

Place 'coop tube po%ition at minimum Place inlet )ane po%ition at minimum -lo%e inlet flue ga% damper 'top I1F motor -lo%e outlet flue ga% damper

6


7/67

Interlock & Protection of D fan system

Start permissive

utlet damper *a% been clo%ed4 F1F Inlet )ane po%ition i% at minimum4 F1F


8/67

utlet %*utoff damper clo%ed after F1F i% running4 dela/ # %econd utlet %*utoff damper not opened w*en F1F %tartup4 dela/ 20 %econd%

FDF outlet electric damper

Permission condition of closing

=*i% %ide F1F %topped


.fter t*i% %ide F1F %tartup4 dela/ 0 %econd% open damper all I1F and F1F *a)e been %topped4 open damper4 time dela/ # minute% (from a%king for free )entilation

Interlock close conditions

=*i% %ide F1F tripped and t*e ot*er F1F i% running4 clo%e damper

FDF inlet vane

Interlock conditions of opening (or)

.%king for free )entilation 4dela/ # minute%4 open damper

Interlock conditions of closing (or)

=*i% %ide F1F trip and t*e ot*er %ide F1F i% running4 clo%e damper


8


9/67

-lo%e outlet damper Place inlet )ane at minimum po%ition 'tart F1F motor pen outlet damper

;elea%e inlet )ane

Seuence stop procedures

Place inlet )ane at minimum po%ition 'top F1F motor -lo%e outlet damper ;elea%e inlet )ane

Interlock & Protection of "P# system

Start permissive conditions of main driving motor

,o fault of main dri)ing motor ,o fault of clearance ad?u%tment ,o fault of fire alarm ,o fault of oil %tation @uide bearing oil %tation *a% been %tarted(intrain 'upport bearing oil %tation *a% been %tarted (intrain .u7iliar/ dri)ing motor %topped ;emote %tate of main motor $ain dri)ing motor %topped operation utlet %econd air damper clo%ed utlet9inlet primar/ air damper clo%ed

"


10/67

Inlet flue ga% damper clo%ed utlet flue ga% damper clo%ed

Stop permissive conditions of main driving motor

Inlet flue ga% temperature- I1F and F1F of t*i% %ide %topped

!rip conditions of main driving motor

$ain dri)ing motor fault .ccident button action

Startup permissive conditions of au"iliary driving motor

.u7iliar/ dri)ing motor %topped ;emote %tate of au7iliar/ dri)ing motor ,o fault of au7iliar/ dri)ing motor ,o fault of au7iliar/ dri)ing motor fan $ain motor %topped

Stop permissive conditions of au"iliary driving motor

Inlet flue ga% temperature- I1F .,1 F1F of t*i% %ide %topped

!rip conditions of au"iliary driving motor

Fault of au7iliar/ dri)ing motor .ccident button action

0


11/67

Interlock test of main driving motor and au"iliary driving motor

.u7iliar/ motor %tart%4 if main motor tripped.fter running4 in manner of interlock

Interlock of air pre#$eater and inlet flue gas damper


.%k for free )entilation4 time dela/ # minute%4 open damper

Interlock conditions of closing

.PH (main motor and au7! motor of t*i% %ide %topped .nd no a%king for free )entilation4 dela/ 300%ec

Interlock of air pre#$eater and outlet flue gas damper


.%k for free )entilation time dela/ # minute%4 open damper


.PH (main motor and .AB! motor %topped and no a%king for freeCentilation4 dela/ 300 %econd4 clo%e damper


12/67

Interlock of air pre#$eater and outlet secondary air damper


.%k for free )entilation time dela/ # minute%4 open damper


.PH (main motor and .AB !motor%topped and no a%king for freeCentilation4 time dela/ 300 %econd%4 clo%e damper!

Seuence startup procedures

-ondition%D remote %tate and no fault of oil %tation

In%tructionD %tart oil %tation of .PH! -onditionD oil %tation operation i% normal In%tructionD %tart main motor! -onditionD main motor operate% for 0 %econd In%tructionD open outlet %econd air damper! -ondition outlet %econd air damper *a% been opened In%tructionD open inlet flue ga% damper! -onditionD inlet flue ga% damper *a% been opened In%tructionD open inlet9outlet primar/ air damper!

-onditionD inlet9 outlet primar/ air damper *a% been opened In%tructionD %tart procedure% fulfilled!


-,1I=I, inlet flue ga% temperature


13/67

-onditionD inlet flue ga% damper *a% been clo%ed In%tructionD clo%e outlet %econd air damper -onditionD outlet %econd air damper *a% been clo%ed In%tructionD clo%e inlet9outlet air primar/ damper

-onditionD inlet9outlet air primar/ damper *a% been clo%ed In%tructionD %top main motor of .PH -,1I=I,D main motor of .PH *a% been %topped In%tructionD %top procedure% fulfilled

Interlock test of air pre#$eater oil station

utlet il pre%%ure of working pump i% low (


14/67

Interlock & Protection of P" fan system

Start permissive

utlet damper clo%ed 4P. Place Inlet )ane at minimum po%ition4 P.


15/67

Front 9 rear bearing temperature i% )er/ *ig*4 dela/ 2 %econd% (5"0>- Front 9 rear motor bearing temperature i% )er/ *ig*4 dela/ 2 %econd% 50#>- $otor coil temperature i% )er/ *ig*4 dela/ 2 %econd% (53#>- +earing )ibration(7 direction i% )er/ *ig*4 dela/ 2 %econd% (5!mm9%

+earing )ibration (/ directioni% )er/ *ig* 4dela/ 2 %econd% (5!mm9% $otor bearing )ibration(7 direction i% )er/ *ig*4 dela/ 2 %econd% (5!mm9% $otor bearing )ibration(/ direction i% )er/ *ig*4 dela/ 2 %econd (5!mm9% .ccident button action $F= action =*i% I1F %topped after t*i% I1F i% running =wo I1F %topped after two I1F are running =wo F1F %topped after two F1F are running utlet damper clo%ed after P. fan i% running4 dela/ # %econd% utlet damper clo%ed w*en P. fan %tartup4 dela/ 20 %econd%

%utlet electric damper of primary air fan

Permission conditions of closing

=*i% %ide P. fan *a% been %toppedInterlock conditions of opening

=*i% %ide P. fan% %tartup4 open damper4 dela/ 0 %econd%Interlock conditions of closing

=*i% %ide P. fan tripped and t*e ot*er P. fan i% running4 clo%e damper

Inlet vane of P fan


=*i% %ide P. fan tripped and t*e ot*er P. fan i% running4 clo%e damper!


pen utlet outlet primar/ damper of t*i% %ide .PH

#


16/67

pen utlet inlet primar/ damper of t*i% %ide .PH -lo%e utlet damper Place inlet )ane at minimum po%ition 'tart P. fan motor

pen utlet damper ;elea%e inlet )ane


Place inlet damper at minimum po%ition 'top P. fan motor -lo%e utlet inlet primar/ damper of t*i% %ide .PH -lo%e utlet outlet primar/ damper of t*i% %ide .PH ;elea%e inlet )ane

Interlock & Protection of 'oal P(l)eriser

Start permissive

+arring gear motor retreated!

-oal ignition of corre%ponding la/er permitted

'uitable temperature at outlet of coal pul)erier (##5 t


17/67

o Inlet pre%%ure of oil di%tributor 0!3$Pa =emperature of t*ru%t bearing #0°-

Hig* differential pre%%ure between %eal air and primar/ air of coal pul)erier (2kPa

Primar/ cold9*ot )al)e opened .n/ primar/ air fan operating4 wit* normal primar/ air pre%%ure (0!#kPa -oal pul)erier outlet )al)e opened ,o $F= trip condition% 'uitable temperature of coal pul)erier bearing (le%% t*an "#°- 'uitable air flow at inlet of coal Pul)eri%er (0!6#J( 3"000cu m !9*r -obble coal bunker inlet )al)e opened! ,o coal pul)erier trip condition% coal feeder outlet damper% clo%ed

Interlock trip conditions for coal pulveri'er

perator %end% in%truction for coal pul)erier %top $F= $F= ne or more outlet damper% clo%ed during t*e operation of coal pul)erier Primar/ air )olume low(dela/ 3 %econd 30000$39H (


18/67

-oal feeder %topped4 time dela/ed 0min Eoading pump %topped 4time dela/ 2% Eoading oil pre%%ure - Furnace air )olume 530 (from $-' ,o $F= %ignal% .t lea%t %eal air fan operating 1rum %team pre%%ure 53!# $Pa Primar/ air pre%%ure normal 5 GPa Furnace pre%%ure normal (from $-'(600 to 0 Pa

ondition of coal firing satisfied (ignition energy)( D)

-ommon condition of coal firing %ati%fied il gun of ad?acent la/er i% running %* ad?acent coal feeder 4 feeder rate


19/67

Interlock damper conditions

Steam fire#fig$ting valve of coal pulveri'er

%pening permission condition .n/ one %eal air fan i% runningInterlock opening conditions (or)

=emperature at outlet of coal pul)erier greater t*an 20°C4 time dela/ed #% mill trippedInterlock closing conditions

%team firefig*ting )al)e opened4 reac*ed 8 minute% and temperature at outlet of coal pul)erier i% greater t*an "0 ° -(2 of 3Seal fan valve of mill

%pening permission condition

.n/ one primar/ fan i% running 4dela/ # %econd%losing permission condition

$ill %topped4 dela/ # %econd%Interlock closing condition (or)

.ll %eal air fan% %topped $ill %topped4 dela/ 2 minute%

Inlet $ot s$ut#off damper of mill


,o $F=

Interlock closing condition $F=

Inlet cold s$ut#off damper of mill

%pen permission condition

,o $F=Interlock closing condition

$F= $ill %tripped pul%e

Inlet valve of coal feeder

"


20/67


;emote po%ition .,1 , $F=losing permission conditionD ;emote po%ition

Interlock closing condition

-oal feeder tripped $ill %topped

Start conditions for seuence control of coal pulveri'er +( D)

.n/ primar/ air fan operating .n/ %eal air fan operating for 60%

Start procedures for seuence control+

'tart low %peed oil pump of coal pul)erier t*in oil %tation .fter low %peed oil pump %tarted for :min and t*e temperature of t*in oil %tation gear bo7 oil 528°4 %tart *ig* %peed oil pump

.9+ of coal pul)erier pen %eal air electric )al)e of coal pul)erier 'tart */draulic %tation to load oil pump pen fire %team )al)e of coal pul)erier Fire %team )al)e of coal pul)erier *a% been open for 8min4 clo%e fire %team )al)e of coal pul)erier pen cutoff )al)e% at : outlet% of coal pul)erier pen cold and primar/ *ot air cutoff )al)e% of coal pul)erier 'uitable temperature at outlet of coal pul)erier ;i%e coal pul)erier roller 'tart coal pul)erier pen coal feeder outlet )al)e pen inlet )al)e of coal feeder 'tart coal feeder

20


21/67

'tart coal pul)erier4 con%tant load

Stop conditions for seuence control+

-oal pul)erier operating -lo%ing permi%%ion condition D remote operation Interlock clo%ing conditionD coal feeder %topped•-oal feeder %topped•$ill %topped

Stop procedures for seuential control Inform $-' to lower t*e coal feeder rpm to it% minimum )alue -lo%e primar/ *ot air cutoff )al)e of coal Pul)eri%er .fter t*e temperature at outlet of coal feeder -4 clo%e t*e )al)e at inlet of coal feeder

'top coal feeder time dela/ed min -lo%e )al)e at outlet of coal feeder time dela/ed minute Eift coal pul)erier roller 'top coal pul)erier Eower coal pul)erier roller

,ube oil station of coal pulveri'er

Start conditions of lo- speed pump (and)

Place lube oil %tation at remote control po%ition il temperature52>-Start conditions of $ig$ speed pump (and)

Place lube oil %tation at remote control po%ition il temperature528>-Interlock starting standby pump

K*en $ain work oil pump faultil/ %topped4 %tart %tandb/ oil pump in manner of interlock K*en $ain work oil pump i% running and outlet oil pre%%ure i% low (


22/67

Stop permission condition

$ill %topped4 time dela/ 20 minute

.lectric $eater of lube oil station

Start permission condition

.n/ il pump i% running il le)el i% normalInterlock start condition

il bo7 temperature -Interlock stopping condition (or)

Llectrical *eater tripped .ll oil pump %topped

il bo7 temperature 5:0>- il le)er i% low

/ydraulic oil station loading pump


Place loading oil %tation at remote control po%ition il le)el i% normalStop permission condition

$ill %topped4 time dela/ 20 minute.lectric $eater of $ydraulic oil station


Eoading il pump i% running il le)er i% normalInterlock starting condition

il bo7 temperature -Interlock stopping condition (or)

il bo7 temperature 530>- il le)el i% low

22


23/67

Interlock & Protection of 'oal ee*er

Startup conditions for coal feeder

-oal pul)erier operating

In%truct coal feeder at a rpm of minimum!

-oal ignition of corre%ponding la/er permitted ,o $F=

!rip condition for coal feeder

-oal pul)erier %topped -oal feeder keep running4 lower )al)e clo%ed4 time dela/ed #%

$F=

Inner o)er temperature of coal feeder4 time dela/ed 20% (none

,ocoal on belt during t*e operation of coal feeder4 time dela/ed 20%

-oal plugging at outlet during t*e operation of coal feeder4 time dela/ed 2%

*esult c$eck after coal feeder tripped

Inlet )al)e of coal feeder opened utlet )al)e of coal feeder opened

In%truct coal feeder at a rpm of minimum )alue 0rpm

Interlock & Protection of Seal "ir an

23


24/67

Start permission conditions

.n/ one primar/ air fan i% running Inlet )ane *a% been clo%ed

+earing temperature of t*e %eal air fan i% normal (- $otor +earing temperature of t*e %eal air fan i% normal (-

,o fault of t*e %eal air fan

Stop permission conditions

K*en two %eal air fan% i% running4 outlet main pipe pre%%ure i% normal4 permit %topping an/ a fan!

.ll primar/ air fan% %topped

$F= tripped

Interlock startup conditions

$ain air fan %topped utlet manifold pre%%ure i% low4 time dela/ 2 %econd - Front 9rear motor +earing temperature i% )er/ *ig*4 dela/ 2 %econd 58#>-

2:


25/67

Interlock & Protection of Scanner "ir an

Start permission conditions

;emote po%ition

,o faultInterlock start conditions Flame detector cool main pipe pre%%ure i% low4 interlock %tart t*e %tandb/ fan(!-

2#


26/67

Interlock of Boiler

=wo airpre*eater% tripped after dela/ # minute4 trip two induced draft fan%4 two primar/ air fan%4 : coal pul)erier%4 : coalfeeder% in manner of interlock4 clo%e feeding oil Muick clo%e )al)e in manner of interlock4 and trip all t*e oil gun%

=wo induced draft fan% tripped4 trip : coal pul)erier%4 : coal feeder% in manner of interlock4 clo%e feeding oil Muick clo%e)al)e in manner of interlock4 and trip all t*e oil gun%

=wo induced draft fan% tripped4 trip two primar/ air fan%4 : coal pul)erier%4 : coal feeder% in manner of interlock4 clo%efeeding oil Muick clo%e )al)e in manner of interlock4 and trip all t*e oil gun%

=wo primar/ air fan% tripped4 trip : coal pul)erier%4 : coal feeder%

ne airpre*eater tripped after dela/ # minute4 trip t*i% %ide induced draft fan4 one t*i% %ide primar/ air fan ne induced draft fan tripped4 trip t*i% %ide forced draft fan4 trip t*i% primar/ air fan

K*en t*ree or e7ce%% t*ree operating coal pul)erier% are running! ne primar/ air fan tripped 4 trip 2 coal pul)erier% of .and 14 2 coal feeder% of . and 1

Interlock & Protection of SSS

Purge Permissives

,o $F= trip condition% .t lea%t one forced draft fan operating! .t lea%t one induced draft fan operating! =wo airpre*eater operating! .ll t*e flame detector probe% cannot detect flame4 and all t*e flame detector% no fault! (=wo Feeding oil Muick clo%e )al)e% clo%ed4 (two return oil Muick clo%e )al)e% clo%ed4 all t*e oil angle )al)e clo%ed .ll t*e coal pul)erier% %topped and all outlet )al)e% clo%ed .ll coal feeder% %topped all t*e oil angle )al)e clo%ed .ll primar/ air fan% %topped Furnace air )olume530 +$-;


27/67

Flame detector cooling air pre%%ure normal (:GPa 'team drum water le)el normal (2305 drum le)el


28/67

-lo%e all cold9*ot air )al)e% of coal pul)erier =rip all primar/ air fan% 'end t*e $F= action %ignal to %oot blower4 tripped pen all damper% of fuel air and au7iliar/ air!

'end t*e $F=!action %ignal to electric du%t catc*er 4tripped =urbine tripped

*esult c$ecklist of $ard -ire logic after 0F! tripped

.ll primar/ fan% tripped .ll mill tripped .ll coal feeder tripped -lo%e all fuel oil returned )al)e% -lo%e %uppl/ oil %*utoff )al)e%(lig*t oil and weig*t oil .ll oil angle )al)e%(lig*t oil and weig*t oil -lo%e main )al)e% of %uper*eater detemperaturer -lo%e main )al)e% of re*eater detemperaturer Llectric du%tcatc*er tripped 'oot blowing %/%tem tripped

Interlock of B/7

+oiler $F= tripped 4trip turbine4 trip generator oil 'witc* =urbine tripped and load5:04 trip $F=4trip generator oil 'witc* @enerator tran%former block protection tripped4 trip turbine w*en turbine tripped and load 5:04trip $F=

28


29/67

Interlock test c-ecklist of steam an* ater system

1oiler steam pressure protection test

'team *eader %team pre%%ure i% more t*an :!0$Pa4L;C %olenoid pre%%ure relief )al)e i% automaticall/ opened

'team *eader %team pre%%ure i% le%% t*an 3!6$Pa4L;C %olenoid pre%%ure relief )al)e i% automaticall/ clo%edSteam e"$aust electric valve234 53 is started in boiler super$eat steam $eader

'team e7*au%t electric )al)e2O i% clo%ed4 interlock clo%e )al)eO

'team e7*au%t electric )al)e 2O i% opened4 interlock open )al)eOSteam e"$aust electric valve234 53 is started in boiler re$eat steam $eader

'team e7*au%t electric )al)e2O i% clo%ed4 interlock clo%e )al)eO 'team e7*au%t electric )al)e 2Oi% opened4 interlock open )al)e O

1oiler emergency blo-#off electric valve for -ater234 53 (set interlock s-itc$)

K*en t*e water le)el of drum decrea%e% from 00mm to #0$$4 interlock clo%e emergenc/ blowoff electric )al)eO42O4 lowwater le)el alarm

K*en t*e water le)el of drum increa%e% to 00$$4 interlock open emergenc/ blowoff electric )al)eO42O4 *ig* water le)el

alarm

.lectric valve and control valve interlock condition of boiler desuper$eating -ater

K*en $F= i% %tarted or t*e load i% le%% t*an 204 interlock clo%e %uper*eat %team %/%tem de%uper*eating water %ubelectric)al)e4eac* de%uper*eating water control )al)e automaticall/ c*anged to manual control4 and interlock clo%e

K*en %uper*eater primar/ de%uper*eating water control )al)e of %ide . i% clo%ed(


30/67

'uper*eater primar/ de%uper*eating water control )al)e of %ide . i% opened (534 interlock open% corre%ponding %uper*eaterde%uper*eating water %ubelectric)al)e!

K*en %uper*eater primar/ de%uper*eating water control )al)e of %ide + i% clo%ed(


31/67

,o $F=4 interlock i% clo%ed4 %tartup i% not acce%%ible! =*e pre%%ure of drum i% to 0!2$pa4 interlock clo%e4 %tartup i% forbidden!

Interlock test c-ecklist of f(el oil system

,ig$t oil system

E1 %uppl/ pump

'tart condition ;emote control=rip condition $otor fault

Interlock start conditions of ,D% supply pump

utlet pre%%ure i% low4 %tart %tandb/ pump

$otor fault of operating pump4 %tart %tandb/ pump

!est c$ecklist of lig$t oil %F!!rip conditions of lig$t oil+

$ain fuel tripD $F= rela/ tripped or an/ $F= condition a)ailable or wit* $F= memor/Q $anual lig*t oil F=D peration gi)e% off lig*t oil F= in%truction from operator %tation frame

3


32/67

Eig*t oil manifold pre%%ure lowD Eow pre%%ure of oil manifold (2of 3 la%t% for more t*an #%4 and %ome oil angle )al)e% %tillopen (


33/67

pen t*e oil return Muick clo%e )al)e of lig*t oil (meanw*ile4 open t*e fuel pre%%ure regulation )al)e4 clo%ed after 0%! .nddi%pla/ Rlig*t oil fuel leakage te%t .ctual action% proceedingR on operator %tation %creen

Kit*in 300%4 if t*e manifold pre%%ure after t*e lig*t oil feeding Muick clo%e )al)e low (difference )alue


34/67

il )al)e not clo%ed .,1 oil gun not forward

Seuence Start

Forward lig*t oil gun Forward igniter gun pen lig*t oil )al)e

Seuence stop

-lo%e lig*t oil )al)e

Forward lig*t oil gun

Forward igniter gun

pen purge )al)e

-lo%e purge )al)e

+ackward lig*t oil gun/eavy oil system /F% supply pump

'tart condition ;emote control=rip condition $otor fault

Interlock start conditions of ,D% supply pump

utlet pre%%ure i% low4 %tart %tandb/ pump $otor fault of operating pump4 %tart %tandb/ pump

!est c$ecklist of $eavy oil %F!!rip conditions of $eavy oil+

$ain fuel tripD $F= rela/ tripped or an/ $F= condition a)ailable or wit* $F= memor/Q $anual lig*t oil F=D peration gi)e% off *ea)/ oil F= in%truction from operator %tation frame

3:


35/67

Hea)/ oil manifold pre%%ure lowD Eow pre%%ure of oil manifold (2of 3 la%t% for more t*an #%4 and %ome oil angle )al)e% %tillopen

Hea)/ oil %uppl/ fa%t )al)e clo%ed4 and %ome oil angle )al)e% %till open； Eow pre%%ure of atomiing %team (2of3 la%t% for more t*an 0%4 and %ome oil angle )al)e% %till open Eow temperature of *ea)/ oil4 time dela/ed min4 and oil angle )al)e %till open

Start t$e follo-ing euipments in manner of interlock after %F!

-lo%e all oil )al)e% of *ea)/ oil

-lo%e all purging )al)e% of oil gun

-lo%e *ea)/ oil %uppl/ cutoff )al)e

-lo%e *ea)/ oil return cutoff )al)e (pul%e

-lo%e atomiing )al)e of *ea)/ oil

%F! reset conditions

.ll angle )al)e% clo%ed

$F= rela/ re%et

Hea)/ oil F= (%oft trip condition% not a)ailable!

pen main inlet fa%t %*utoff )al)e of weig*t oil

!est c$ecklist of /eavy oil leakage procedures6eig$t oil leakage test permissive conditions $F= rela/ tripped

F= tripped (%oft Heavy oil feeding quick close pneumatic main valve closed;

Heavy oil leakage test valve closed;

All the oil angle valve closed;

Return oil quick close valve closed

All the fire detector indicate no flame;

Oil source pressure permissive.

3#


36/67

6eig$t oil system fuel leakage test seuence

If permi%%i)e condition% are met4 command to %tart up leakage te%t can be %ent from t*e operator %tation %creen pen t*e oil return Muick clo%e )al)e of *ea)/ oil (meanw*ile4 open t*e fuel )olume regulation )al)e4 clo%ed after 0%! Kit*in 300%4 if t*e manifold pre%%ure after t*e *ea)/ oil feeding Muick clo%e )al)e low (


37/67

Hea)/ oil F= Il gun not feeded in place Ignition failed il )al)e open failed

il )al)e not clo%ed .,1 oil gun not forward il )al)e opened .,1 atomiing )al)e not opened!

'eMuence 'tart Forward Hea)/ oil gun pen *ea)/ oil atomiing )al)e pen *ea)/ oil )al)e!

'eMuence %top -lo%e *ea)/ oil )al)e

-lo%e atomiation )al)e Forward *ea)/ oil gun

pen purge or atomiing )al)e -lo%e purge or atomiing )al)e

+ackward *ea)/ oil gun

ESP & Bag filter

K*en t*e flue temperature 80°C, treat% it a% t*e normal %ituation4 clo%e t*e +/pa%% %/%tem and open t*e %*ield air circuit! K*en t*e flue temperature 580>-4 t*e Flue temperature will be bad for t*e filter bag4 t*e control %/%tem will open t*e b/pa%%

Cal)e and clo%e t*e lifting )al)e in bag field4 t*en t*e flue go t*oug* b/pa%% directl/ to t*e outlet! K*en t*e flue temperature de%cend% to 60>-4 t*e -ontrol %/%tem will open t*e bag fieldS% lifting )al)e4 and clo%e b/pa%%

)al)e! ;ig*t now t*e %/%tem i% con%idered a% normal %tatu%! 'eriou%l/ monitor t*e condition% of flue temperature4 pre%%ure drop and pre%%ure of precipitatorS% eac* point4 make% a record

eac* 30 min4 immediatel/ contact wit* t*e %uper)i%or or boiler midcontrol w*ile appear% abnormal %ituation!

3


38/67

!

Poer from knole*ge

/(r0ine & "(iliaries Interlock &

ProtectionWPCL, Warora

7S7 .nergy Ventures ,td (8 9 2:; 06)

'on*ensate Etraction P(mp 'EP

38



39/67

Seuence startup procedures of condensate pump

-lo%e outlet )al)e 'tartup motor .fter conden%ate pump i% operated for #%pen outlet )al)e

Seuence stop procedures of condensate pump

-lo%e outlet )al)e of conden%ate pump 'top conden%ate pump

Inspection of startup permissive conditions of condensate pump

Hot well water le)el of conden%er normal (320mm to "#mm

-onden%ate pumpT% outlet )al)e clo%ed or %tandb/ one enabled -LP winding temp


40/67

Cibration of -LP %*aft i% *ig* (alarm !mm9% =rip !2mm9%Interlock

-LP running dela/% #%ec4 open outlet motor )al)e -LP %top 4clo%e outlet motor )al)e Lnable -LP a% %tandb/ 4 open -LP outlet motor )al)e Lnable -LP %tandb/4 -LP emergenc/ tripped4 immediatel/ %tandb/ -LP %tart%! Lnable -LP %tandb/ 4 w*en -LP main pipe pre%%ure !32 $Pa dela/% 3 % 4%tart %tandb/ -LP -onden%er le)el lower 4 open make up water motor )al)e ( 300mm -onden%er le)el *ig*er4 clo%e make up water motor )al)e( "#mm K*en conden%ate flow


41/67

=emperature down%tream EP b/pa%% 5 00- open in a manner of interlock

'irc(lating ater system

Startup permissive conditions of 6 pump

;emote -KP control

-KP t*ru%t bearing temp


42/67

.fter -KP %tartup 60 %ec outlet butterfl/ )al)e accident4 %top -KP K*en -KP outlet )al)e clo%e to 20 deg4 %top -KP K*en -KP tripped4 outlet butterfl/ )al)e automaticall/ clo%e%

Seuence startup procedures of 6 pump

-lo%e -K PA$P outlet )al)e pen -K PA$P inlet )al)e K*en utlet )al)e of -K pump open #>or -K pump operating4 %tartup . -K pump

Seuence stop procedures of 6 pump

-lo%e outlet )al)e of -K pump to #> 'top motor of -K pump

ooling -ater booster pump startup

K*en running cooling water boo%ter pump tripped and enable %tandb/ pump4 interlock %tart up t*e %tandb/ pumpK*en cooling water boo%ter pump main pipe pre%%ure lower4 %tart %tandb/ pump in interlock Pump %uction pre%%ure


43/67

Boiler ee* P(mp Interlock & Protection

Protection

1eaerator water le)el EE (2of3 380mm Eube oil pre%%ure EE 0!0# $Pa +FP operating boo%ter pump inlet motor )al)e clo%ed

Inlet oil temp working oil 30>- alarm 0>-+FP t*ru%t bearing temp "#>- alarm 80>- $otor bearing temperature of boo%ter pump end "0>- alarm 80>- dela/ 3 %ec

$otor bearing temperature of */draulic coupler end "0>- alarm 80>- dela/ 3 %ec +oo%ter pump dri)e9free end bearing temp "0>- alarm #>- dela/ 3 +FP in%ide 9out%ide radial bearing temp "0>- alarm #>- dela/ 3 +FP */draulic couple% radial bearing temp "#>- alarm 8#>- dela/ 3 ( +FP winding temp 30>- alarm 0>- dela/ 3 ( 6 Eocal emergenc/ button operated

K*en +FP operation4 flow 28 t9*r and minimum flow )al)e i% clo%ed!4 dela/ # %ec +FP will tripped! $otoried feed water pump operating and boo%ter pump inlet )al)e clo%ed

Start Permissives

:3


44/67

+oo%ter pump inlet motoried )al)e & ;ecirculation )al)e full/ opened Eube oil pre%%ure normal 0!$Pa 1eaerator water le)el normal +oo%ter pump inlet )al)e opened 'coop tube po%ition# +oo%ter pump dri)e9free end radial bearing temperature - $otor bearing temperature of boo%ter pump end - $otor bearing temp of */drauliccoupler end - H/draulic coupling bearing (0t* point < 8#>- +FP t*ru%t bearing temp(up%ide4 down%ide - +FP winding temperature - Korking oil cooler inlet temp- +FP outlet motor )al)e clo%ed ; %tandb/

1ifferential pre%%ure of inlet %creen for motoried feed water pump and boo%ter pump i% abnormal

Seuence startup procedures

'tartup au7iliar/ oil pump and lube oil pre%%ure normal4 'coop tube at minimum po%ition (


45/67

ctions to enable motori'ed feed -ater pump as standby

'tartup au7iliar/ oil pump

pen recirculation )al)e pen boo%ter pump motor inlet )al)e pen +FP outlet motor )al)e 'coop tube placed at minimum po%ition pen motor )al)e of ;e*eater

Interlock

;unning +FP tripped4 immediatel/ %tart %tandb/ +FP in interlock

+FP enabled a% %tandb/4 open t*e )al)e in manner of interlock +FP %topped4 clo%e outlet )al)e in manner of interlock K*en +FP operation and flow 28=9Hr ;ecirculation )al)e opened K*en +FP operation and flow 283=9Hr ;ecirculation )al)e clo%ed K*en enable %tandb/4 %coop tube po%ition of %tandb/ +FP ad?u%t a% t*e %ame %coop tube po%ition of running +FP

u"iliary oil pump interlock of motori'ed feed -ater pump

$otoried feed water pump operating and lube oil pre%%ure lower t*an 0!08 $Pa4 automatic %tartup Lnable motoried feed water pump a% %tandb/ and %tart in manner of interlock

$otoried feed water pump %topped and protection , +FP operating and lube oil pre%%ure *ig*er t*an 0!3 $Pa 4 dela/ # %ec and au7iliar/ oil pump automaticall/ %top

ac((m system

Vacuum pump startup permissive conditions

Cacuum pump inlet pneumatic )al)e clo%ed -ontrol b/ remote

:#


46/67

'team9water %eparator le)el i% normal

Interlock

'tart )acuum pump4 interlock %tartup circulate pump and open inlet butterfl/ )al)e 'top )acuum pump4 interlock clo%e inlet butterfl/ )al)e ;unning pump trip4 interlock %tart %tandb/ pump 'team9water %eparator le)el low4 dela/ # min trip t*e pump Cacuum pump . operating or %tandb/4 and %eparator water le)el low4 automaticall/ open water makeup %olenoid )al)e of

%teamwater %eparator Cacuum pump . water le)el *ig*4 automaticall/ clo%e water makeup %olenoid )al)e of %teamwater %eparator K*en conden%er pre%%ure 5: Gpa and one pump in operation 4 interlock %tart %tandb/ pump!

5(0e oil systemInterlock

K*en lube oil pre%%ure i% low4 interlock %tart .- lube oil pump (Pr! 0!0:"$Pa K*en turbine trip% interlock %tart .- lube oil pump K*en lube oil pre%%ure i% lower interlock %tart 1- EP (Pr 0!03"2$Pa .- lube oil pump emergenc/ tripped4 interlock %tart 1- EP! K*en running VP tripped interlock %tart %tandb/ VP K*en VP running and outlet pre%%ure i% low 4 interlock %tart %tandb/ pump

(Pr $Pa =urbine rotational %peed (5220rpm 4 %top VP! =urbine rotational %peed (


47/67

E# oil system

./ oil pump interlock protection

LH oil manifold pre%%ure lower to !2 $Pa alarm4 and %tart up %tandb/ LH oil pump b/ mean% of interlock 1LH oil pump emergenc/ trip4 interlock %tart %tandb/ pump!

Start#up permissive

il tank le)el normal il temperature i% 520 deg -!

Deaerator systemInterlock

1eaerator water le)el HH (!2##0mm4 1eaerator o)erflow )al)e opened in manner of interlock4 1eaerator water le)el not *ig*4(


48/67

HPH O water le)el i% *ig* III4 HP *eater i% tripping (!5800mm HPH O 2 water le)el i% *ig* II4 open emergenc/ drain control )al)e4 clo%e normal drain control )al)e from HPH O to HPH O

2 (5600mm HPH O 2 water le)el i% low I4 clo%e emergenc/ drain control )al)e! (


49/67

0% dela/ and load larger t*an 30 4 clo%e pipe drain )al)e after electric )al)e9before c*eck )al)e for :t* %tage %teame7traction

Stop procedures for seuence control of ,P $eaters

-lo%e t*e EP *eater %team e7traction electric )al)e -lo%e t*e EP *eater %teame7traction c*eck )al)e pen pipe drain )al)e after %team e7traction electric )al)e of EP *eater pen t*e pipe drain )al)e before c*eck )al)e of EP *eater pen EP *eater b/pa%% electric )al)e -lo%e EP *eater inlet electric )al)e -lo%e EP *eater outlet electric )al)e pen EP *eater emergenc/ drain )al)e #% dela/4 open pipe drain )al)e after %team e7traction electric )al)e9before c*eck )al)e of EP *eater

Inspection of ,P $eater uitting conditions 'team turbine tripping @enerator Muitting EP *eater water le)el HHH (0#0mm $anual Muitting 5 P- action

Interlock

EPH O : water le)el i% *ig* II4 open emergenc/ drain control )al)e4 clo%e e7traction O : c*eck )al)e & $C 4 open e7tractionO : drain )al)e4 Kater %ide b/pa%% $C open & i9l & o9l $C clo%ed! (50#0mm

EPH O : water le)el i% *ig* I 4 open emergenc/ drain control )al)e !(5"00mm EPH O : water le)el i% low I4 clo%e emergenc/ drain control )al)e to conden%er! (


50/67

EPH O 6 water le)el i% *ig* II4 open emergenc/ drain control )al)e4 clo%e EPH O # normal drain to EPH O 6 control )al)e 4clo%e e7traction O6 $C 4 open e7traction O 6 drain )al)e4 Kater %ide b/pa%% $C open & i9l & o9l $C clo%ed!(50#0mm

EPH O 6 water le)el i% low I clo%e emergenc/ drain control )al)e (


51/67

'team turbine HP main %team )al)e (rig*t upper %eat drain )al)e 'team turbine HP main %team )al)e (rig*t lower %eat drain )al)e 'team turbine HP ca%ing %team e7*au%t pipe (left drain )al)e 'team turbine HP ca%ing %team e7*au%t pipe (rig*t drain )al)e 'team turbine HP ca%ing %team e7*au%t manifold drain )al)e 1rain )al)e before %t %tage %team e7traction electric )al)e 1rain )al)e before %t %tage %team e7traction c*eck )al)e 1rain )al)e after %t %tage %team e7traction electric )al)e 1rain )al)e after %t %tage %team e7traction c*eck )al)e HP b/pa%% pipe drain )al)e

,oad @2>?4 lose follo-ing valves automatically

Eeft %ide main %team pipe drain )al)e

;ig*t %ide main %team pipe drain )al)e HP guide %team pipe drain )al)e 'team turbine HP main %team )al)e (left upper %eat drain )al)e 'team turbine HP main %team )al)e (left lower %eat drain )al)e 'team turbine HP main %team )al)e (rig*t upper %eat drain )al)e 'team turbine HP main %team )al)e (rig*t lower %eat drain )al)e 'team turbine HP ca%ing %team e7*au%t pipe (left drain )al)e 'team turbine HP ca%ing %team e7*au%t pipe (rig*t drain )al)e 'team turbine HP ca%ing %team e7*au%t manifold drain )al)e

1rain )al)e before %t %tage %team e7traction electric )al)e 1rain )al)e before %t %tage %team e7traction c*eck )al)e 1rain )al)e after %t %tage %team e7traction electric )al)e 1rain )al)e after %t %tage %team e7traction c*eck )al)e HP b/pa%% pipe drain )al)e

,oad =5>?4 open follo-ing valves automatically

#


52/67

Eeft %ide re*eating %team pipe drain )al)e ;ig*t %ide re*eating %team pipe drain )al)e 'team turbine combined re*eat )al)e (left drain )al)e 'team turbine combined re*eat )al)e (rig*t drain )al)e 1rain )al)e before 3rd %tage %team e7traction electric )al)e 1rain )al)e after 3rd %tage %team e7traction c*eck )al)e 1rain )al)e before :t* %tage %team e7traction electric )al)e 1rain )al)e after :t* %tage %team e7traction c*eck )al)e

,oad @5>?4 lose follo-ing valves automatically

Eeft %ide re*eating %team pipe drain )al)e ;ig*t %ide re*eating %team pipe drain )al)e 'team turbine combined re*eat )al)e (left drain )al)e 'team turbine combined re*eat )al)e (rig*t drain )al)e

1rain )al)e before 3rd %tage %team e7traction electric )al)e 1rain )al)e after 3rd %tage %team e7traction c*eck )al)e 1rain )al)e before :t* %tage %team e7traction electric )al)e 1rain )al)e after :t* %tage %team e7traction c*eck )al)e

,oad =:>?4 open follo-ing valves automatically

1rain )al)e before #t* %tage %team e7traction electric )al)e 1rain )al)e after #t* %tage %team e7traction c*eck )al)e 1rain )al)e before 6t* %tage %team e7traction electric )al)e 1rain )al)e after 6t* %tage %team e7traction c*eck )al)e

,oad @:>?4 lose follo-ing valves automatically

1rain )al)e before #t* %tage %team e7traction electric )al)e 1rain )al)e after #t* %tage %team e7traction c*eck )al)e 1rain )al)e before 6t* %tage %team e7traction electric )al)e 1rain )al)e after 6t* %tage %team e7traction c*eck )al)e

#2


53/67

'team turbine HP ca%ing %team e7*au%t pipe (left drain )al)e 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock 'team turbine HP ca%ing %team e7*au%t pipe (rig*t drain )al)e 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock 'team turbine HP ca%ing %team e7*au%t manifold drain )al)e 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock 'team pipe drain )al)e before EP b/pa%% )al)e . 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock 'team pipe drain )al)e before EP b/pa%% )al)e + 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock

'team pipe drain )al)e after EP b/pa%% )al)e . 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock

'team pipe drain )al)e after EP b/pa%% )al)e + 1rain tank water le)el HH4 opened in manner of interlock4 not *ig*4 clo%ed in manner of interlock 'team turbine tripping or generator Muitting4 HP ca%ing left %ide %team e7*au%t c*eck )al)e clo%ed in manner of protection 'team turbine tripping or generator Muitting4 HP ca%ing rig*t %ide %team e7*au%t c*eck )al)e clo%ed in manner of protection

S$aft seal system

Self start of s$aft seal fan

Lnable interlock4 and pump + tripped under emergenc/Self start of s$aft seal fan 1

Lnable interlock4 and pump . tripped under emergenc/

Bypass system

/P 1ypass

utomatic opening

#3


54/67

=urbine trip

utomatic closing

=emperature be*ind HP b/pa%% i% Hig* (360U- 1e%uper*eating water pre%%ure i% low (%witc*

Interlock HP b/pa%% )al)e open4 open de%uper*eating i%olating )al)e HP b/pa%% clo%e%4 interlock clo%e de%uper*eating i%olated )al)e HP b/pa%% clo%ed4 interlock clo%e de%uper*eating control )al)e ;elief )al)e i% clo%e4 de%uper*eating control )al)e i% forbidden to open

,P bypassutomatic opening

=urbine trip

utomatic closing

-onden%er )acuum low 0Gpa (293 -onden%er temperature *ig* 0◦- .fterEP b/pa%% )al)e temperature *ig* 0◦- EP b/pa%% %pra/ water pre%%ure low

Interlock

EP +/pa%% open4 open de%uper*eating control )al)e i% open EP +/pa%% control )al)e open4 open de%uper*eating i%olating )al)e EP +/pa%% control )al)e clo%e4 clo%e de%uper*eating i%olating )al)e

/(r0ine

#:


55/67

,ubricating oil pressure is lo- II (AB>:C50Pa AB>:C50Pa !rip)

%ver speed (D./ ::>>rpm4 !SI ::>>rpm)

./ oil pressure is lo- II (ABE0Pa ABE 0Pa !rip)

1earing vibration is $ig$ (B5;mms B25mms)

Vacuum is lo- (2CB 7pa 28B 7Pa )

Displacement of a"ial direction is $ig$ (alarm >B;mmB trip 2B5mm4

#2B


56/67

Procedure of Latching and Rolling

!efore "atching # $tart %H oil &ump

$creen $tatus

Auto Control 'n message screen () *rip +) Auto ) All control valve closed

$olenoidmonitor All solenoids should -e green /ischarged )

Auto Control Click on 0 "A*CH0 1ray )

$olenoidmonitor $olenoid 2, 3, 4 and 5 turn 0 R%/0.

Auto Control Check 0 "A*CH 0 turned 0 R%/0

6ith a-ove sequence "atching get completed. 7o8 tur-ine ready to roll, 'f all parameters -uilt up as per *ur-ine condition

Auto Control Click on 0R970

$olenoidmonitor

Auto Control :ain steam and Reheat steam stop valve 8ill open.

or starting Rolling 'ncreasing speed )

Auto Control Click on 0 $&%%/ RA*% 0 and give a value %> = +>> R&:?:inute)

Click on 0 *AR1%* 0 and give a value %> R&: )

Auto Control Click on 0 1O?HO"/ 0 and select 01O0 and 8atch the speed rise.

*hen as per the *ur-ine temperature diffrence -et8een top and -ottom, /iffrencial %


57/67

1,7%! /.7,IS!

2) .nsure DG start and emergency bus c$argedB

5) .nsure .%P and P/ D motor started (IF .%P%P not Pick up t$en open vacuum breaker

valve:) ll proper drains valves from to be close from DS as -ell as isolation valve to be close from local

to avoid condenser pressuri'ationB

8) .nsure 1oiler & !urbine 0%V panel c$arged from .mergency 1usB

;) lose bot$ side 0BSBSBV


58/67

AUTO SYNCHRONIZATION

D 92

Oper !"# $%&'e#er "r U#!-1 (") 'e *p +r"*'+ *" e,! !"#. *" $/#+r"#!0 !"#

'eM! %peration Item Wtime

%afet/ mea%ure%

Implement operation %uper)i%ion %/%tem %trictl/! =*e %uper)i%or %*ould be e7perienced operator orabo)e!

2 Kear in%ulation glo)e% and proper working tool%!

3 =*e %taff i% bot* p*/%icall/ and p%/c*ologicall/ well and familiar wit* t*e %/%tem!

2 operation mea%ure%1 Re+ear$e +e "pera!"# e#a/.

Anit -*eck t*e cooling water %/%tem of generator Anit air cooler i% working normall/!

3O -*eck t*e rotation %peed of turbine Anit i% %tead/! $aintain t*e rotation %peed of t*e turbine bet*e %ame wit* grid freMuenc/!

4Anit er!6/ +a 'e#era"r ra#$6"rer U#!-1 !$ p* !#" $er(!e "rre/."#/"#e $e "6 r""r ear+!#' pr"e!"# !$ " 8e p* !#" $er(!e)

5 C"$e p"9er Ⅰ" "pera!"# 8", 4:;


59/67

U$e INC ?DCQ8*"# " !#rea$e +e 'e#era"r ("a'e " +e rae= (a*e "6 13.B%(6""9 8*$8ar ("a'e re'*a!#' a#= $!'+/ +!'+er +a# 8*$8ar ("a'e)U'EUF0G'）13.B35

11Anit 75.4(； 5>7.4A) er!6/ +a 3 p+a$e$ ("a'e "6 'e#era"r U#!-1 !$ 8aa#e=a#= #"-"a= e,!a!"# paraeer$ $*+ a$ ("a'e a#= *rre# are "rre. "pare

" #"-"a= rae= paraeer$ 75.4(； 5>7.4A)1 J 1 CS er!6/ +a +ere !$ #" a8#"ra $!'#a !# 'e#era"r U#!-1 pr"e!"#pa#eK e,!a!"# r"" a#= CS.

13 S?@;Q C"#6!r +a $/#+r"#!a!"# $ee $9!+ !$ a S?@;Qp"$!!"#.

141 SL ZG C"#6!r +a +e SL p"9er G "6 aa! "#r" pa#e J1 !$ area=/"$e= a#= $/#+r"#!a!"# !$ p* !#" $er(!e.

153 1MC C"#6!r +a +e p"9er MC "6 $/#+r"#!!#' *#! "6 aa! "#r" pa#e J3!$ area=/ "$e=.

1> 4 STG AUTO C"#6!r AUTO !$ $eee= a "$a! "#r" pa#e J4 STG.

17

4 ATR?SIAF:G ?,! are$!aQ C"#6!r ?,! are$!aQ !$ $eee= a "$a! "#r"

pa#e J4 ATR?SIA:G

1B

1 O 1E -E'LQ1-' 1E '=.;=Q -*ange outlet breaker 1E of generator tran%former Anit on mo%aic control

panel Anit o)er to -E'LQand put %/nc*roniation into %er)ice!(or click R'=.;=R at t*e interfaceof 1-' generator tran%former outlet breaker 1E to put %/nc*roniation into %er)ice

#"

1 ?H AUTO C"#r" $/#Q C+e% +e !#er6ae "6 ?H AUTO C"#r" a#= (er!6/ +a$/#Qap !$ "# R?)

0?H AUTO C"#r" $/#Q?H C!% $/# !# +e !#er6ae "6 ?H AUTO C"#r" " p*


60/67

60

0?H $/#+r"#!a!"# !#" $er(!e.

1?H C+e% ?H " $e#= $/#+r"#!a!"# per!$$!"# $!'#a a#= +e $/#+r"#!a!"# eer$+"*= 8e +ar'e=.

22 $anuall/ ad?u%t t*e generator freMuenc/ and )oltage to be t*e %ame wit* t*o%e of grid %/%tem!

23 3 START UP Pre$$ "$e 8*"# "6 a*" $/# START UP 8rea%er "# "$a! "#r" pa#eJ3.

2:Cerif/ t*at %/nc*roniation unit i% working normall/!(it automaticall/ regulate t*e generator freMuenc/ and

)oltage be t*e %ame wit* t*o%e of t*e grid %/%tem!2# O 1ECerif/ t*at t*e auto clo%ing of generator Anit breaker 1E i% normal! (;ed lamp on

26 O Cerif/ t*at t*e indication of %tator 3p*a%e% current i% correct!!

7 ?H $/#Q er!6/ +e ?H $/#+r"#!$a!"# reQ*e$ !$ a#ee=.F$/#Q 8e"e$ 're/）

B1-' 1E L7itQ -lick RLBI=R on t*e interface of 1-' generator tran%former outlet breaker 1E to cancel%/nc*roniation!

1 SL ?H C"#6!r +e SL "# +e "#r" pa#e 1 $+"*= 8e re$e.$/# "* a#= 9!+=ra96r" reQ*e$ $/# 6r" ?H $!'#a)

30

O 1@ -onfirm t*at %/nc*roniation of 1E breaker of generator tran%former Anit i% cancelled!(lamp of

%/nc*roniation meter die%31

4 MANUA@ HAN@?STG)UNCHANSee UNCHAN "6 MANUA@ HAN@?STG) $9!+ "# "$a! "#r" pa#e J4.

3O AV 1DP !$"##e 1DP W?N?RATOR STARTXSTOP ?ARTH ;AU@T< pr"e!"# "#pr"e!"# pa#e A "6 'e#era"r ra#$6"rer U#!-1.

33O A V BDP !$"##e BDP ACCI?NTA@ ?N?RWISATION R?@AY< pr"e!"# "# pr"e!"#pa#e A "6 'e#era"r ra#$6"rer U#!-1.

34O AV 31DP !$"##e 31DP ;@ASH O?RQpr"e!"# "# pr"e!"# pa#e A "6 'e#era"rra#$6"rer U#!-1.

3# O . :B+ -E'L $.I, C.ECL I Q P* :B+ -E'L $.I, C.ECL I Q pr"e!"# !#" $er(!e

"# pr"e!"# pa#e A "6 'e#era"r ra#$6"rer J1.36 O . 23B+ -E'L $.I, C.ECL IIQ P* 23B+ -E'L $.I, C.ECL IIQ pr"e!"# !#"

$er(!e "# pr"e!"# pa#e A "6 'e#era"r ra#$6"rer J1.

3 O 1DP !$"##e 1DP W?N?RATOR STARTXSTOP ?ARTH ;AU@T< pr"e!"# "# pr"e!"#pa#e "6 'e#era"r ra#$6"rer U#!-1.

38 O 1DP !$"##e 1DP W?N?RATOR STARTXSTOP ?ARTH ;AU@T< pr"e!"# "# pr"e!"#pa#e "6 'e#era"r ra#$6"rer U#!-1.

3" O 31DP !$"##e 31DP ;@ASH O?RQpr"e!"# "# pr"e!"# pa#e "6 'e#era"rra#$6"rer U#!-1.

:0 U#!-1 er!6/ +a 'e#era"r U#!-1 !$ 9"r%!#' #"ra/.

: O + :B+ -E'L $.I, C.ECL I Q P* :B+ -E'L $.I, C.ECL I Q pr"e!"# !#" $er(!e"# pr"e!"# pa#e "6 'e#era"r ra#$6"rer J1.

:2 O + 23B+ -E'L $.I, C.ECL IIQ P* 2B+ -E'L $.I, C.ECL IIQ pr"e!"# !#"$er(!e "# pr"e!"# pa#e "6 'e#era"r ra#$6"rer J1.


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Turbine Triping and Alarm

S.No. ETS Protection TURBINE TRIP ALARAM Action

( A.3?=(.>2) Auto

+ $haft @i-ration B>.+2mm B>.(+2mm) Auto

%H oil pressure lo8 4.5:pa (+:&A Auto

D "u-e oil pressure lo8 >.>E+:pa >.>DE:&A Auto

2@accum of condenser lo8

(E.4Fpa(D.DF&A Auto

3 *$' overspeed >> R&: +D>R&: Auto

4 /%H Over speed >>rpm Auto

5 /%H ailure

TURBINE TRIP

Auto

E !oiler :* action Auto

(> %lectrical 1enerator and transformer protection Auto

(( Remote manual emergency shutdo8n Auto

(+ *hrust !rg. *emp H' Auto

a.*hrst. &ad temp. B((> GC B(>> GC Auto

(

-. !rg. :etal.temp.B((2 GC B(>2 GC

Auto

"& e


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(2 H'& /ifferential e


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%%*DI!.D 0S!.* %!*%,

In a =*ermal Power Anit operation t*e critical internal unit parameter% related to production are $K4 $ain %team pre%%ure! =*ecritical e7ternal parameter i% freMuenc/ of t*e network! In a boiler t*e %team production depend% on combu%tion control (Fuel controland .ir flow control! 'o one of t*e unit parameter% $K or main %team pre%%ure mu%t be u%ed for +oiler control! =urbine @enerator produce% electrical output ($K proportional to %team input to turbine! =*e turbine control %/%tem (LH- )arie% %team input toturbine to ac*ie)e unit parameter $K or $ain %team pre%%ure! =*e network %tabilit/ alwa/% depend% on t*e balance of power production and power con%umption! .n/ unbalance in t*e power production and power con%umption lead% to c*ange in t*e freMuenc/of operation in t*e direction of attaining natural %tabiliation i!e!4 balancing of power con%umption wit* power production! Howe)er a%t*e capacit/ of t*i% %tabiliation i% limited for t*e network for %tabilit/4 proportional freMuenc/ correction i% gi)en in turbine control%/%tem to )ar/ t*e power production in t*e direction to ac*ie)e %tabilit/ of network! =*e # regulation u%ed generall/ in t*ermal

power unit%4 gi)e% 00 load correction for # freMuenc/ di%turbance in t*e network! =*i% i% %elected mainl/ to ac*ie)e network %tabilit/ wit*in t*e rotating mac*ine% %peed )ariation of "# to 0#! .t 0 =urbo generator% *a)e o)er %peed trip protection!

In a network t*e power production or power con%umption can c*ange due to %e)eral rea%on% like unit% tripping on %ome internal problem% or load breaker tripping! 'o to en%ure t*e %tabilit/ of network it i% nece%%ar/ to *a)e freMuenc/ regulation in =urbine controlit i% al%o to be emp*a%ied *ere t*at if onl/ few unit% in t*e network implement t*e freMuenc/ control t*e total di%turbance in t*enetwork will be pa%%ed on to t*e unit% *a)ing regulation b/ t*e man/ unit% w*ic* do not *a)e regulation! FreMuenc/ i% network parameter w*ic* can not be controlled b/ few unit% in t*e network!

In =*ermal Power Anit% t*e =urbine% are fa%tl/ re%ponding component% and +oiler% are *a)ing tran%port lag and =*ermal inertia

and *ence dela/edl/ re%pond wit* )ariation in command! 'o t*e =urbine will be able to meet $K demand or main %team pre%%ure %et)alue Muickl/ b/ po%itioning t*e control )al)e% of =urbine to t*e reMuired )alue%! =urbine will be able to maintain onl/ one unit parameter $K or main %team pre%%ure! =*e ot*er i% to be controlled4 naturall/ b/ t*e boiler! =*e mode% of operating t*e unit arenamed a% turbine follow mode and boiler follow mode! In =urbine follow mode =urbine maintain% t*rottle %team pre%%ure! =*e $Kdepend% on t*e %team output from t*e +oiler! =*e )ariation% in t*e +oiler %team output will be re%ulting )ariation% in $K output!+oiler %team output )ariation% can re%ult from c*anging -alorific )alue% of coal etc! =urbine follow mode gi)e% more %tabilit/ to unit b/ controlling main %team pre%%ure perfectl/ and fa%tl/ w*ic* i% a )er/ important unit parameter! If +oiler combu%tion control% fueland air are in .uto correcti)e action% will be taken b/ boiler controller% to c*ange combu%tion to gi)e de%ired %team for t*e %et $K!

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=*e%e re%pon%e% will be %low w*en compared to turbine re%pon%e%! 'o it ma/ be reemp*a%ied t*at t*i% mode of operation gi)e%ma7imum %tabilit/ to unit operation% wit* %low re%pon%e to grid -ontdYYY!29

6:


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DD02DDreMuirement% b/ initiating combu%tion control% fir%t and turbine )al)e% po%itioning after %team production! Howe)er t*e combu%tioncontrol% will be re%ponding to grid reMuirement% if freMuenc/ influence in -$- con%ole i% in Z,S po%ition onl/!

In +oiler follow mode =urbine maintain% $K demand% and +oiler maintain% main %team pre%%ure! =urbine will be re%ponding

to grid reMuirement fa%tl/ becau%e of droop c*aracteri%tic %et in LH- and +oiler will be following to maintain main %team pre%%ure if combu%tion control% are in .uto! =*i% mode of operation gi)e% ma7imum %tabilit/ to network becau%e $K reMuirement% are met b/=urbine fa%tl/ and le%%er importance to unit %tabilit/4 becau%e t*e action b/ =urbine will be di%turbing main %team pre%%ure! If all unit%in t*e network do not implement # regulation t*en t*e network di%turbance% will be pa%%ed on to t*e unit% in +oiler follow modedi%turbing t*eir $K le)el of operation often! +oiler combu%tion control% mu%t be kept in .uto in t*i% mode of operation w*ic* will betaking main %team flow and main %team pre%%ure error a% input% for control! =*e main %team pre%%ure i% t*e final trimming %ignal to boiler for boiler follow mode of operation! ;e%pon%e of =urbine to grid reMuirement% i% Muickl/ percei)ed b/ boiler control% t*roug*main %team flow )ariation%! Finall/ +oiler control% en%ure t*e %et t*rottle pre%%ure!

In coordinated mode of operation unit9ma%ter control %tation %et% $K %et point w*ic* will be pur%ued b/ combu%tion control%

b/ taking main %team pre%%ure error a% final trimming input %ignal! =urbine will be controlling t*e $K at t*e %et point or c*ange% ingrid freMuenc/ will be leading to c*ange% in t*e $K! $ain %team pre%%ure error will *a)e proportional influence for %tabilit/ of t*eunit! +oiler will be tr/ing to control main %team pre%%ure! -oordinated mode and boiler follow mode are %imilar in re%pon%e e7ceptt*at ba%e %ignal reMuired for boiler combu%tion control i% $K %et point in coordination mode and main %team flow %ignal in +oiler follow mode!'u%tained t*rottle pre%%ure controller output will be t*e re%ult due to calorific )alue de)iation from de%ign calorific )alueand t*i% output will be getting added to unit demand going to boiler ma%ter !t*e calorific )alue correction controller in auto mode take%t*e output of t*rottle pre%%ure controller a% input and work% a% long time integrator to produce output to repre%ent calorific )aluew*ic* work% a% multiplier for fuel demand to boiler !In t*e proce%% of t*i% long time action4 t*e t*rottle pre%%ure controller outputreturn% to almo%t ero! =*e ad)antage% in t*i% control action are better tran%ient re%pon%e %ince t*e calorific )alue i% a% per actualcalorific )alue of coal going to t*e boiler and t*e t*rottle pre%%ure controller *a% margin% all t*e time on bot* po%iti)e and negati)e

%ide%! Anit capabilit/ i% capacit/ of t*e unit to produce t*e $K at t*at time! Anit capabilit/ %ignal depend% on t*e number of .u7iliarie% in %er)ice and t*eir contribution i% e7pre%%ed a% $K %ignal w*ic* t*e/ can %upport! For e7ample if %i7 mill% are reMuiredto produce #00$K eac* mill capabilit/ will be taken a% 8# $K appro7imatel/! =*e capabilit/ will be computed from eac* t/pe of .u7iliarie% and minimum of all t*e%e will be t*e unit capabilit/! n an/ running .u7iliar/ tripping4 unit capabilit/ %ignal will bedependent on t*e t/pe of au7iliar/ tripped!

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DD03DD In ;unback mode +oiler combu%tion control% gi)e command% in proportion to unit capabilit/ and boiler will be coming to t*e %tateof %tead/ combu%tion and *ence will be %tabiliing! =urbine will be controlling main %team pre%%ure a% t*i% will gi)e ma7imum%tabilit/ to t*e unit! ;unback mode gi)e% *ig*e%t %tabilit/ to

unit becau%e unit *a% gone to in%tabilit/ (e7!$ill9+FP9I19F1 tripped t*i% ;unback mode get% %elected automaticall/ and en%ure%%tabilit/! K*ene)er unit capabilit/ i% le%% t*an unit ma%ter command t*e ;unback mode %et% in automaticall/!

=*e four mode% of operation de%cribed abo)e can be %ummaried in t*e following wa/!$ode +oiler -ontrol% =urbine -ontrol% Input to +oiler

-ontrol%Input to =urbine-ontrol%

=urbinefollow

$K Pre%%ure $K 'et point(ba%e %ignal$K error %ignal

Pre%%ure error

+oiler

follow

Pre%%ure $K 'team Flow

(ba%e %ignalPre%%ure error

$K error

-oordinated$ode

Pre%%ure $K $K %et point(ba%e %ignalPre%%ure error

$K error

;unbackmode

Produce% %teama% per unitcapabilit/

Pre%%ure Anit capabilit/%ignal(computed

Pre%%ure error

=*e -oordinated $a%ter -ontrol i% written wit* a )iew to bring all concept% in it toget*er to gi)e a complete )iew of it!Lmp*a%i% i% gi)en on concept% rat*er t*an on t*e -$- %c*eme!

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6

interlock & protection handbook

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