black out is land operation
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Black Out is Land OperationTRANSCRIPT
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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.
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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
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Plant #afety
Considerations Turbine lube oil system
Hydrogen Seal Oil System
RAH and GRF rotation
Condenser pressuremonitoring
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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
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#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 $or "lari0"ation&/roper "ommuni"ation among
operation sta- and o."ers play a
!ital role Set all "ommuni"ation
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Prime considerations in
Black outstart te unit au'iliaries by starting%iesel ,ngine Generator (%,G) as perSO/
,nergi1e ,mergen"y bus bars A2CA 3A2C2
,nergi1e units 4&4 56 au' bus22,322F
,nergi1e ligting trans$ormers
Cange o!er %C dri!en pumps to A&C
,ner i1e 2atter "ar ers o$ 7
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+# LA*% OP(,AT+O*
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%& 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 &
:
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-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
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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&
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+s Land Operation
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MO*+TO,+*- O'
K() PA,AM(T(,#%U,+*- +# LA*%
OP(,AT+O*
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+s Land Operation
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*CR sta-
Case A
*ote any prote"tion relays and alarmoperated on prote"tion panel
• Coordinate "ontrol to stabili1ed tesystem $re#uen"y and !oltage&
• H:TAS sele"tor reset to auto ormanual(<=>4)
• Re syn"roni1ed te unit on :s ;and&
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Actions re8uired to stabili0ed
te unit during +s Land operationCase A or B
Boiler operator
•
?aintained Fuel oil 3 gas burner inletpr to sa$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
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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&
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+s Land Operation
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*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&
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• 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$ormers sould be
pysi"ally "e"ked noted open as
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• :t sould be ensure tat all trippedunit au'iliary Trans$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
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• 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&
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• 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 $or tepurpose at unit >)unit no&> willsyn"roni1ed on dead bus bar&
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• 4&4 56 bus bar A2CA3A2C2 souldpre$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 $or standby wit breaker
o en&
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Actions re8uired to
stabili0ed te unit during +s Landoperation
Case A or B
Boiler operator• ?aintained Fuel burner inlet pr to
sa$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
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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&
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•Actions re8uired at
te units &ic arenot facing +s Land
operation in case Btotal break do&n
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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
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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
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ack 'eed Line
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+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
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• ,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
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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&
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2a"k $eed line up
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