Download - Black Out is Land Operation

7/18/2019 Black Out is Land Operation

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BLACK OUT

( Total break down) Prime considerations of

plant safety and parameters. island operation Monitoring of Keyparameters duringisland operation. Procedure of feed back

for oter unit au!iliaries.



BLACK OUT

All te Unit trips at B"P# tat meanstotal electrical supply failure and nobackup supply from system and oter

sources are a$ailable

#tation outgoing feeder ig $oltagelines circuit breakers are open

#tation %.C system a$ailable and in



Plant #afety

Considerations Turbine lube oil system

Hydrogen Seal Oil System

RAH and GRF rotation

Condenser pressuremonitoring



Plant #A'(T)CO*#+%(,AT+O*#

.We a!e to prote"t ea" e#uipment at plantspe"ially Ce"k all running o$ %&C operatedemergen"y ba"k up au'iliaries su" as %C

H seal oil pump %C turbine lube oilpumps

%rain steam lines against water ammering

*ote+ Confrmation rom local is mustManager operation should himsel

check the oil o! rom sight glasses andtur"ine and #A$ turning



#aring te

responsibilities,a" sta- and o."er o$ operationsould "learly know teirresponsibility and a"tion to do

troug emergen"y operation SO/sduring bla"k out &re!iew and dis"ussemergen"y SO/S in normal

en!ironment $or "lari0"ation&/roper "ommuni"ation among

operation sta- and o."ers play a

!ital role Set all "ommuni"ation



Prime considerations in

Black outstart te unit au'iliaries by starting%iesel ,ngine Generator (%,G) as perSO/

,nergi1e ,mergen"y bus bars A2CA 3A2C2

,nergi1e units 4&4 56 au' bus22,322F

,nergi1e ligting trans$ormers

Cange o!er %C dri!en pumps to A&C

,ner i1e 2atter "ar ers o$ 7



+# LA*% OP(,AT+O*



%& LA'( O)*#AT%O'

Te term :s land operation is useddue to te similarity o$ same

s"enario $a"ed at any :s land in teo"ean were you a!e to sur!i!edwit out te assistan"e o$ rest o$ te

world and depends on te $a"ilitiesa!ailable at :s ;and $or li!ing till teassistan"e re"ei!ed $rom rest o$ teworld &

:



-eneral *ote

• +n general as per protection logicunits at B"P# &ere not facilitate tore/syncroni0ed &it net&ork after

attaining +s land conditions on deadbus bar.

• Unit no 1 and 2 are no& madea$ailable by (3M after modi4cation in

logic5 #OP is de$eloped &it teconsultation &it (3M

&ic must be re$ie&ed periodically

during normal conditions byo eration sta6 and o7cers



Tis operation is re"ommendedonly $or restoration o$ emergen"yessential au'iliaries o$ te units

be"ause unit on :sland may be"omeunstable upon starting o$ any 4&4 56au'iliaries&

A$ter te syn"roni1ation witnational grid unit start up a"ti!itiesmay be started&



+s Land Operation



MO*+TO,+*- O'

K() PA,AM(T(,#%U,+*- +# LA*%

OP(,AT+O*



+s Land Operation



*CR sta-

Case A

*ote any prote"tion relays and alarmoperated on prote"tion panel

• Coordinate "ontrol to stabili1ed tesystem $re#uen"y and !oltage&

• H:TAS sele"tor reset to auto ormanual(<=>4)

• Re syn"roni1ed te unit on :s ;and&



Actions re8uired to stabili0ed

te unit during +s Land operationCase A or B

Boiler operator

•

?aintained Fuel oil 3 gas burner inletpr to sa$e !alue <pper Si' burner will"ut o- as per logi"&

•

?aintained 2oiler drum le!el put"ontrol on manual i$ re#uired&

• Control ?ain steam temperature well

abo!e tripping !alue(re@ignite upper



Turbine Operator.• Obser!e C6 and CR6 position and load

!ariation&

• ?aintained RH pressure to around 9 bar toa!oid re!erse power prote"tion&

• Ce"k H/ and ;/ bypass operation put

"ontrol on manual i$ re#uired "oordinatewit boiler operator regarding drum le!el

• Ce"k and "ontrol H/ Heater and ;/Heater le!el "ontrol $rom lo"al open

bypass !al!e $rom lo"al i$ re#uired&



+s Land Operation



*CR

:n "ase o$ 5,SC total supply $ailureand <nits > or 4 or bot a!e sa$eisolation on :S;A*% mode $ollowing

steps will be taken $or teir sa$e re@syn"roni1ation on 8 56 G:S %ead2us 2ar&



• All indi"ations and prote"tion relaysoperated on te <nits 8 56 linesand station trans$ormers at 2/S

end will be re"orded and"ommuni"ated to ;%C as early aspossible&

• Te status o$ 8 56 Cir"uit 2reakers(O/,* or C;OS,) o$ O3H linesunitsand startup trans$ormers sould be

pysi"ally "e"ked noted open as



• :t sould be ensure tat all trippedunit au'iliary Trans$ormers ?ain :n$eed 2reakers (==22, B 4= 22, 3

==22F B 4=22F) sould be in OFF position

• 4 &A$ter ensuring "learan"e o$

te bus bar unit > or 4 generator"ir"uit

breaker will be "losed on 8 56

%ead 2us as $ollows



• At U*+T 2

• Syn&"ir"uit o-

•

Syn&key on manual• /&2 (main release) press down on

"ontrol panel& <nit 4 willsyn"roni1ed on dead bus bar&



• At U*+T 1

• Syn& Cir"uit OFF

•

Syn&Cir"uit&5ey set on ?anual (4&4k! syn&key to be insert) at unit >

• /&2 press down ( pro!ided $or tepurpose at unit >)unit no&> willsyn"roni1ed on dead bus bar&



• 4&4 56 bus bar A2CA3A2C2 souldpre$erably be energi1ed eiter onauto(depending upon te "3o sele"tor

position) or manual in order to energi1eessential au'iliaries o$ te unit on :S;A*% &

• First try to energi1e te emergen"y busbar (A=2CA@A2CA3A=2C2@A2C2) $rom

te unit on :sland operation upon $ailingto do so ten allow to syn"roni1e $romany %,G on emergen"y bus bar &%,Gsmay be started $or standby wit breaker

o en&



Actions re8uired to

stabili0ed te unit during +s Landoperation

Case A or B

Boiler operator• ?aintained Fuel burner inlet pr to

sa$e !alue Si' burner will "ut o- as

per logi"&• ?aintained 2oiler drum le!el put

"ontrol on manual i$ re#uired&

• Control ?ain steam temperature well



Turbine Operator.• Obser!e C6 and CR6 position and load

!ariation&

• ?aintained RH pressure to around 9 bar toa!oid re!erse power prote"tion&

• Ce"k H/ and ;/ bypass operation put

"ontrol on manual i$ re#uired "oordinatewit boiler operator regarding drum le!el

• Ce"k and "ontrol H/ Heater and ;/Heater le!el "ontrol $rom lo"al open

bypass !al!e $rom lo"al i$ re#uired&



•Actions re8uired at

te units &ic arenot facing +s Land

operation in case Btotal break do&n



BO+L(, #+%(

• A$ter loss o$ au'iliary ele"tri" power"on0rm tat RAH is rotating on air motor&Open Air Heater bypass gas damper and

"lose Air Heaters inlet gas dampers& :$ airsupply o$ RAH dri!e is lost rotate AirHeaters by manual andle operation(ensure motor breaker ra"ked out)

– Open F%F inlet !anes E outlet dampers$or natural dra$t purging $or at least 8minutes

–

Wen au'iliary power is a!ailable putAir Heaters on ele"tri" dri!e& Close boiler



Turbine #ide

• Ce"k tat turbine emergen"y lube oil pumpand %C seal oil pump $or Generator a!estarted&("e"k on lo"al)

• Open "ondenser !a"uum breaker and "ut o-

"ondenser gland steam system as perpro"edure

• Wen AC au'iliary power is a!ailable "arry out$ollowing operations+

• Start TO/ O/ /ut turbine on turning gear &• Start open E "lose "ooling system pump

• Start Generator seal oil pump 6a"uum pp o$ Hseal system(<= E>4)

• Turbine oil tank !apors e'tra"tor



ack 'eed Line



+s Land conditionCase B

• ,nergi1e witout delay te 4&4 56emergen"y bus A2CA 3 A2C2 $rom teunit wi" is on :s land operation to ensure

instrument air "ompressor supply&• Wen unit on :s land is establised and

A2CA32 $ed $rom unit supply "on0rmopening o$ 4&4 56 breakers o$ start up =

and



• ,nergi1e manually te oter start upemergen"y bus A2CA32 andA=2CA 32 by "losing te tie breakers

• Similarly energi1e 22,322F bus barby "losing "oupling breakers andenergi1e 788 6 busses and %&C

"argers at ea" unit• Coordinate wit "ontrol $or ba"k $eed

$rom system



Total 2reak %own

• Ask "ontrol $or ba"k $eed $rom any$eeder

• Ce"k te system !oltage on te$eeder $rom wi" "ontrol pro!ideba"k $eed

• Close 8 56 breaker o$ start up

A2CT

• Ce"k te 4&4 56 !oltage at A2CA32

• Syn"roni1e te ba"k $eed supply

$rom %,Gs i$ running&



2a"k $eed line up



&

T9A*K )OU