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"@ Stu^y of "@ Stu^y of "@ Stu^y of "@ Stu^y of Si^^hirg[njSi^^hirg[njSi^^hirg[njSi^^hirg[nj 2222××××120 MW 120 MW 120 MW 120 MW
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2Siddhirganj 2×120 MW Peaking Power Plant of EGCB
Pr_s_nt_^ \y
F[ujulF[ujulF[ujulF[ujul K[\irK[\irK[\irK[\ir
ID: 10105132ID: 10105132ID: 10105132ID: 10105132
Progr[m:Progr[m:Progr[m:Progr[m: BSEEEBSEEEBSEEEBSEEE
IUBAT - INTERNATIONAL UNIVERSITY OF BUSINESS
AGRICULTURE & TECHNOLOGY
Date: 23th August, 2014
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Cont_nts� Introduction
� Introduction
� Objectives
� Organizational Overview� About EGCB Ltd.
� Mission, Vision and Quality Policy
� Siddhirganj 2×120 MW Peaking Power Plant
� Power Generation
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� Power Generation� Cycle used in Gas Turbine Power Plant
� Gas Booster Compressor
� Gas Booster Compressor Layout
� Gas Turbine� Gas Turbine Layout
� Inlet Air Filter House
� GT Accessories Compartment
� Compressor
� Combustion System
� Turbine
� Gas Turbine Generator� Gas Turbine Generator
� Gas Turbine Generator Details
� Excitation System
� Sub Station� Single Line Diagram
� Power Transformer
� Auxiliary Transformer
� Instrument Transformer
� Buchholz Relay
Cont_nts
� Buchholz Relay
� Switchgear� Air Break Circuit Breaker
� Vacuum Circuit Breaker
� SF6 Circuit Breaker
� Operation� Starting Procedure
� Synchronization
� Shut Down Procedure
� Daily Generation Report
� Conclusion
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Intro^u]tionIntro^u]tion
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Intro^u]tionIntro^u]tion
Intro^u]tion
� In the 21st century, the dependency on electricity is like the air
on breathe. Now a days it's become a part and parcel of our daily
life. During a power failure, our daily life becomes obsolete.
Considering the present power crisis in Bangladesh, Siddhirganj
2×120 MW Peaking Power Plant of EGCB is producing about 240
MW power to the national grid.MW power to the national grid.
� During the practicum training period in Siddhirganj 2×120 MW
Peaking Power Plant I have gathered knowledge about GE Frame
9E Gas Turbine, Generator, Gas Booster Compressor, Control
Panel, LT & HT Switchgear, Power Transformer, Sub Station and
also the related machines. As I was thirsty about how electricity
generates, now I'm very much pleased to see the process.
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O\j_]tiv_
� General Objective
To extrovert my theoretical knowledge into the practical
field with adequate conceptualization.
� Specific Objective
� Study on Gas Turbine, Gas Booster Compressor, Generator,
Transformer, Switchyards
� Study on Switchgear and Protective Relays
�Maintenance of Electrical Machines (LV & MV) and
Equipment's
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Org[niz[tion[lOrg[niz[tion[l
Ov_rvi_wOv_rvi_w
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Ov_rvi_wOv_rvi_w
@\out EGCB Lt^.
� On 23rd November 1996 BPDB formed Meghnaghat Power
Company (MPC) Ltd.
� On 16th February 2004 the Meghnaghat Power Company (MPC)
Ltd. has been re-named as Electricity Generation Company of
Bangladesh (EGCB) Ltd.
� The company's major share is currently held by BPDB.� The company's major share is currently held by BPDB.
Corporate Office Site Office
BTMC Bhaban Siddhirganj, Narayanganj7-9, Kawran Bazar, Dhaka - 1215 Tel: 02-7694100Tel: +88-02-9134029, +88-02-9134032 Fax: 02-7694100Fax: +88-02-9118345Email: [email protected]
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� Mission
"To excel in electricity business by generation efficient, reliableand cost effective electricity in an environmentally responsiblemanner to satisfy our customers"
� Vision
"Generation of quality electricity for the betterment of theNation“
� Quality Policy
"EGCB is engaged in power generation business. To ensure thisEGCB will establish, operate and maintain generation facilities ina cost effective manner. In this process EGCB shall develop andmaintain its human, organizational, technological and materialresources to ensure continued suitability. The policy will bereviewed from time to time for its continual improvement."
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Si^^hirg[njSi^^hirg[njSi^^hirg[njSi^^hirg[nj 2222××××120 MW P_[king 120 MW P_[king 120 MW P_[king 120 MW P_[king
Pow_r Pl[ntPow_r Pl[ntPow_r Pl[ntPow_r Pl[nt
Contractor : Bharat Heavy Electricals Limited (BHEL), India
Customer : BPDBCustomer : BPDB
Location : Siddhirganj, Narayanganj
Area : 4.17 acres
No. of Unit : 2 (Two)
Capacity : 211.76 MW (2 x 105.88 MW)
Fuel : Natural Gas
Commercial Operation Date : 5 February, 2012
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Pow_rPow_r
G_n_r[tionG_n_r[tionG_n_r[tionG_n_r[tion
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G[s Boost_r Compr_ssor
Gas Booster Compressor (GBC) is used to improve
the supplied fuel gas pressure. During this process,
the density of the gas is increased.
Gas Booster Compressor is having divided in Gas Booster Compressor is having divided in
Three segments…
� Induction Motor
�Gear Box
� Centrifugal Compressor
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Compressor DetailsCompressor Type : BCL406
Normal Capacity : 33086 Nm3/hr
Normal Speed : 11396 rpm
First Critical Speed : 5800 rpm
Power Required : 1562 KW
Casing Design Temp : 1500C
Compression Ratio : 2.6
Suction Pressure : 10.73 Kg/Cm2
Discharge Pressure : 26.85 Kg/Cm2
Casing Discharge Pressure : 29.0 Kg/Cm2Casing Discharge Pressure : 29.0 Kg/Cm2
Gear Box DetailsRated Power : 2222 KW
Input/output speed : 1485/11366
Pin /Gear : 26/199
Induction Motor DetailsKW : 2020 KW
Stator Volts : 6600 Volt
Stator Amps : 209 amps
Rpm : 1492 rpm15
L[yout of G[s Boost_r
Compr_ssor
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G[sG[s
Tur\in_Tur\in_
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Cy]l_ us_^ in G[s Tur\in_ Pow_r
Pl[nt
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Gas Turbine operates on Brayton Cycle. Brayton cycle ishaving divided in four segments namely –
� Compression (Axial Flow Compressor)
� Heat Addition (Combustion Chamber)
� Expansion (Turbine)
� Exhaust (Atmosphere)
G_n_r[l F_[tur_s
GT Model series : MS 9001
Model : PG 9171 E
GT rating : 108.6 MW
Cycle : Simple Cycle
Compression Ratio : 12.7Compression Ratio : 12.7
No. of Compressor Stages : 17 (Seventeen)
No. of Turbine Stages : 03 (Three)
No. of Combustors : 14 (Fourteen)
RPM : 3000
Fuel : Natural Gas
NOx control : Dry Low NOx
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G[s Tur\in_ L[yout
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G[s Tur\in_ Cross S_]tion[l Vi_w
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Inl_t @ir Filt_r Hous_
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Inl_t @ir Filt_r
1st Stage Filter
No. of Filters : 390
Type of Filter : Bag Filter
Initial Pressure Drop : 45 Pa
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Initial Pressure Drop : 45 Pa
2nd Stage Filter
No. of Filters : 390
Type of Filter : Cam GT
Initial Pressure Drop : 145 Pa
GT @]]_ssori_s Comp[rtm_nt
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G[s Tur\in_ Constru]tion[l
F_[tur_s
Gas Turbine mainly divided in Three sections…
� Compressor
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� Compressor
� Combustion System
� Turbine
Compr_ssor
Compressor Casing consists of –� Inlet Guide Vane
� 17 Stages of Rotor and Stator Blades
� 2 Exit Guide Vanes
Inlet Guide Vane (IGV)Inlet Guide Vane (IGV)
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Compr_ssor Rotor
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Stages 5, 6, 7 & 8 compressor rotor blades are coated with specialized
material to avoid corrosion due to moisture formation at this region
Compr_ssor St[tor
Inlet Casing
Forward Compressor Casing
Aft Compressor Casing
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Compressor Stator Casing
Aft Compressor Casing
Compressor Discharge Casing
Compressor Stator and Stator Blades
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�Reverse Flow Type
�14 Combustion Chamber
�Combustion Liners
�Flow Sleeves
Com\ustion Syst_m
�Flow Sleeves
�Transition Pieces
�Cross Fire Tubes
�Flame Detectors
�Fuel Nozzles
�Spark Plugs
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Com\ustion Ch[m\_r L[yout
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Com\ustor
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Com\ustion Ch[m\_rs Compon_nts
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Cross Fire Tube
Tur\in_
Rotor� Buckets
StatorTurbine Shell� Turbine Shell
� Turbine Nozzles
� First Stage Nozzle
� Second Stage Nozzle
� Third Stage Nozzle
� Diaphragms
� Shrouds
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Tur\in_ Rotor
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Tur\in_ St[tor
36
Exh[ust Fr[m_ [n^ Diffus_r
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Exhaust Diffuser
G[sG[s
Tur\in_ Tur\in_
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Tur\in_ Tur\in_
G_n_r[torG_n_r[tor
G[s Tur\in_ G_n_r[tor
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G[s Tur\in_ G_n_r[tor D_t[ilsType TARI 1080-36P
Manufacture BHEL, India
Drive Gas Turbine
Output power 108.6 MW
Apparent power 135750 KVA
RPM 3000
Phase 3 (Three)
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Phase 3 (Three)
Voltage 11KV
Current 7.125 KA
Total Weight 210 Tons
Year 2008
Stator RotorVolt : 11000 Volt Volt : 370 voltAmps : 7125 amps Amp : 817 amp
Cooling Type : CACWOver Speed : 10 % Maxm
Ex]it[tion Syst_m
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Su\ St[tion
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Su\ St[tion
Singl_ Lin_ Di[gr[m
43
Pow_r Tr[nsform_r
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Manufacture Jhansi, BHEL, India 2008
Rating 170/136/102 MVA
Rated Voltage LV-11 KV, HV-132 KV
Rated Current LV-8922.68 A, HV-
743.56A (170 MVA)
No. of Phase Three (3- ɸ)
Pow_r Tr[nsform_r D_t[ils
45
No. of Phase Three (3- ɸ)
Frequency 50 Hz
Tapping 5 (Five) Step, ± 5%
Type of Cooling OFAF/ONAF/ONAN
Connection Symbol YNd1
Maximum Temp. Rise Oil-50° C, Winding-55°
Oil 60800 Liter
Weight of Core and
Coil
94800 Kg
Total Weight 205200 kg
@uxili[ry Tr[nsform_r
Manufacture Jhansi, BHEL, India
Rating 12.5 MVA
Rated Voltage LV-6.6 KV, HV-11 KV
Rated Current LV-1093.47 A,
HV-656.08 A
No. of Phase Three (3- ɸ)
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No. of Phase Three (3- ɸ)
Frequency 50 Hz
Type of Cooling ONAF
Connection
Symbol
Dyn1
St[tion @uxili[ry Tr[nsform_r
[n^ Unit @uxili[ry Tr[nsform_r
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Manufacture Jhansi, BHEL, India
Rating 2.5 MVA
Rated Voltage LV - 0.42 KV
HV - 6.6 KV
Rated Current LV – 3436.6 A
HV – 218.6 A
Type of Cooling ONAN
Connection
Symbol
Dyn11
Manufacture Jhansi, BHEL, India
Rating 1.6 MVA
Rated Voltage LV - 0.42 KV
HV - 6.6 KV
Rated Current LV – 2199.4 A
HV – 139.96 A
Type of Cooling ONAN
Connection
Symbol
Dyn11
Instrum_nt Tr[nsform_r
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Current TransformerCT Ratio is 1200/1 for overcurrent protection and 800/1for differential protection.
Potential TransformerPT Ratio is 1200/1 for overcurrent protection and 800/1 fordifferential protection.
Bu]hholz R_l[y
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Lightning @rr_st_r [n^ Isol[tor
50
Swit]hg_[r
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Swit]hg_[r
Swit]hg_[r P[n_l
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@ir Br_[k Cir]uit Br_[k_r
The air at atmospherepressure is used as an arcextinguishing medium inAir Break Circuit Breakers.
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Air Break Circuit Breakersare used in DC circuits andAC Circuits up to 12 kV.
V[]uum Cir]uit Br_[k_r
A vacuum circuit breaker issuch kind of circuit breakerwhere the arc quenchingtakes place in vacuum.
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The vacuum circuit breaker istoday recognized as mostreliable electric currentinterruption technology formedium voltage switchgear.
SF6 Cir]uit Br_[k_r
A circuit breaker in which theelectric current carryingcontacts operate in sulphurhexafluoride or SF6 gas is knownas an SF6 circuit breaker.
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Due to its high dielectricstrength and high cooling effectSF6 gas is approximately 100times more effective arcquenching media than air.
Tr[nsmitt_r [n^ G[ug_
Pressure transmitter is used for
measuring differential pressures with
a 4-20 mA current loop output signal.
In a level transmitter, the averaged
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In a level transmitter, the averaged
value from the microprocessor is
converted into an analog 4 to 20 mA
signal which is linear with the liquid
level.
Pressure gauges are devices used for
measuring the pressure of a gas or
liquid.
Op_r[tion
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Op_r[tion
C_ntr[l Control Room
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St[rting Pro]_^ur_
� Start GBC lube oil pump.
� Start GBC cooling water pump and fan.
� Start GBC.
� Start-up Command.
� Cranking (Starting) Motor Starts with in 15-30 Second.� Cranking (Starting) Motor Starts with in 15-30 Second.
� Turning-Gear Stopped instantaneously.
� Turbine starts speed-up with the help of Torque Converter(TC).
� At 600 RPM Speed starts decreasing by TC.
� If discharge pressure is more than 23 bar then start GT. (Butfirst GT should already be running on turning gear 6 RPM)
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Continu_…
�After GT start then firing take place at 450 rpmand speed rises to 3000 RPM. [FSNL – Full SpeedNo Load]
� Take permission from grid to synchronization of GT.
� Then finally synchronized. (If frequency is high, more� Then finally synchronized. (If frequency is high, morethan 50.3 Hz, then grid request to reduce thefrequency)
� After synchronization observe all the parameters. Ifparameters is ok then raise load depending on gaspressure.
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Syn]hroniz[tion
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Shut Down Pro]_^ur_
� Load decrease to minimum.
� Shut down command.
� Unit breaker open& RPM starts decreasing.
� At 2850 RPM:
� Auxiliary oil pump start.
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� Auxiliary oil pump start.
� Hydraulic oil pump start.
� Lift (Jacking) oil pump start.
� IGV start closing.
� At about 100 RPM turning gear start and hold the
turbine rotor to keep on 100 RPM by TC.
� To put other lift oil pump stand-by position.
Som_ Working Mom_nts
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D[ily G_n_r[tion R_port
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Con]lusion
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Con]lusion
Con]lusion
� From my internship I acquired practicalknowledge about power system engineering andits equipments.
� Most importantly I have gathered practical� Most importantly I have gathered practicalexperience on how electricity is generated.
� Therefore, I believe I made good achievementswith my industrial training which will help me a lotin my future.
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