This report based on Power plant equipments...

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2. Siddhirganj 2×120 MW Peaking Power Plant of EGCB 2

3. Pr_s_nt_^ y
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IUBAT - INTERNATIONAL UNIVERSITY OF BUSINESS
AGRICULTURE & TECHNOLOGY
Date: 23th August, 2014
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4. 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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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

5. Cont_nts
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
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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6. IInnttrroo^^uu]]ttiioonn
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7. 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 ttoo tthhee nnaattiioonnaall ggrriidd..
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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8. Oj_]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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9. OOrrgg[[nniizz[[ttiioonn[[ll
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10. @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 iiss ccuurrrreennttllyy hheelldd bbyy BBPPDDBB..
Corporate Office Site Office
BTMC Bhaban Siddhirganj, Narayanganj
7-9, Kawran Bazar, Dhaka - 1215 Tel: 02-7694100
Tel: +88-02-9134029, +88-02-9134032 Fax: 02-7694100
Fax: +88-02-9118345
Email: egcb_ltd@yahoo.com
info@egcb.com.bd
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11. Mission
To excel in electricity business by generation efficient, reliable
and cost effective electricity in an environmentally responsible
manner to satisfy our customers
Vision
Generation of quality electricity for the betterment of the
Nation“
Quality Policy
EGCB is engaged in power generation business. To ensure this
EGCB will establish, operate and maintain generation facilities in
a cost effective manner. In this process EGCB shall develop and
maintain its human, organizational, technological and material
resources to ensure continued suitability. The policy will be
reviewed from time to time for its continual improvement.
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Contractor : Bharat Heavy Electricals Limited
(BHEL), India
CCuussttoommeerr :: BBPPDDBB
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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13. PPooww__rr
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14. 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 hhaavviinngg ddiivviiddeedd iinn
Three segments…
Induction Motor
Gear Box
Centrifugal Compressor
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15. Compressor Details
Compressor 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 :: 2299..00 Kgg//CCmm22
Gear Box Details
Rated Power : 2222 KW
Input/output speed : 1485/11366
Pin /Gear : 26/199
Induction Motor Details
KW : 2020 KW
Stator Volts : 6600 Volt
Stator Amps : 209 amps
Rpm : 1492 rpm
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16. L[yout of G[s Boost_r
Compr_ssor
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17. GG[[ss
TTuurriinn__
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18. Cy]l_ us_^ in G[s Turin_ Pow_r
Pl[nt
Gas Turbine operates on Brayton Cycle. Brayton cycle is
having divided in four segments namely –
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Compression (Axial Flow Compressor)
Heat Addition (Combustion Chamber)
Expansion (Turbine)
Exhaust (Atmosphere)

19. 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 RRaattiioo :: 1122..77
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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20. G[s Turin_ L[yout
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21. G[s Turin_ Cross S_]tion[l Vi_w
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22. Inl_t @ir Filt_r Hous_
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23. 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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2nd Stage Filter
No. of Filters : 390
Type of Filter : Cam GT
Initial Pressure Drop : 145 Pa

24. GT @]]_ssori_s Comp[rtm_nt
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25. G[s Turin_ Constru]tion[l
F_[tur_s
Gas Turbine mainly divided in Three sections…
Compressor
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Combustion System
Turbine

26. Compr_ssor
Compressor Casing consists of –
Inlet Guide Vane
17 Stages of Rotor and Stator Blades
2 Exit Guide Vanes
IInnlleett GGuuiiddee VVaannee ((IIGGVV))
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27. Compr_ssor Rotor
Stages 5, 6, 7 8 compressor rotor blades are coated with specialized
material to avoid corrosion due to moisture formation at this region
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28. Compr_ssor St[tor
Inlet Casing
Forward Compressor Casing
Aft Compressor Casing
Compressor Discharge Casing
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Compressor Stator Casing

29. Compressor Stator and Stator Blades
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30. Comustion Syst_m
Reverse Flow Type
14 Combustion Chamber
Combustion Liners
Flow Sleeves
Transition Pieces
Cross Fire Tubes
Flame Detectors
Fuel Nozzles
Spark Plugs
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31. Comustion Ch[m_r L[yout
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32. Comustor
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33. Comustion Ch[m_rs Compon_nts
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Cross Fire Tube

34. Turin_
Rotor
Buckets
Stator
TTuurrbbiinnee SShheellll
Turbine Nozzles
First Stage Nozzle
Second Stage Nozzle
Third Stage Nozzle
Diaphragms
Shrouds
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35. Turin_ Rotor
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36. Turin_ St[tor
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37. Exh[ust Fr[m_ [n^ Diffus_r
Exhaust Diffuser
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38. GG[[ss
TTuurriinn__
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39. G[s Turin_ G_n_r[tor
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40. G[s Turin_ G_n_r[tor D_t[ils
Type TARI 1080-36P
Manufacture BHEL, India
Drive Gas Turbine
Output power 108.6MW
Apparent power 135750 KVA
RPM 3000
Phase 3 (Three)
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Voltage 11KV
Current 7.125 KA
TotalWeight 210 Tons
Year 2008
Stator Rotor
Volt : 11000 Volt Volt : 370 volt
Amps : 7125 amps Amp : 817 amp
Cooling Type : CACW
Over Speed : 10 % Maxm

41. Ex]it[tion Syst_m
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42. Su St[tion
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43. Singl_ Lin_ Di[gr[m
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44. Pow_r Tr[nsform_r
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45. Pow_r Tr[nsform_r D_t[ils
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)
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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
94800 Kg
Coil
Total Weight 205200 kg

46. @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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Frequency 50 Hz
Type of Cooling ONAF
Connection
Dyn1
Symbol

47. 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

48. Instrum_nt Tr[nsform_r
48
Current Transformer
CT Ratio is 1200/1 for over
current protection and 800/1
for differential protection.
Potential Transformer
PT Ratio is 1200/1 for over
current protection and 800/1 for
differential protection.

49. Bu]hholz R_l[y
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50. Lightning @rr_st_r [n^ Isol[tor
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51. Swit]hg_[r
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52. Swit]hg_[r P[n_l
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53. @ir Br_[k Cir]uit Br_[k_r
The air at atmosphere
pressure is used as an arc
extinguishing medium in
Air Break Circuit Breakers.
Air Break Circuit Breakers
are used in DC circuits and
AC Circuits up to 12 kV.
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54. V[]uum Cir]uit Br_[k_r
A vacuum circuit breaker is
such kind of circuit breaker
where the arc quenching
takes place in vacuum.
The vacuum circuit breaker is
today recognized as most
reliable electric current
interruption technology for
medium voltage switchgear.
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55. SF6 Cir]uit Br_[k_r
A circuit breaker in which the
electric current carrying
contacts operate in sulphur
hexafluoride or SF6 gas is known
as an SF6 circuit breaker.
Due to its high dielectric
strength and high cooling effect
SF6 gas is approximately 100
times more effective arc
quenching media than air.
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56. 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
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.
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57. Op_r[tion
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58. C_ntr[l Control Room
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59. 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 wwiitthh iinn 1155--3300 SSeeccoonndd..
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. (But
first GT should already be running on turning gear 6 RPM)
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60. Continu_…
After GT start then firing take place at 450 rpm
and speed rises to 3000 RPM. [FSNL – Full Speed
No Load]
Take permission from grid to synchronization of GT.
Then finally synchronized. (If ffrreeqquueennccyy iiss hhiigghh,, mmoorree
than 50.3 Hz, then grid request to reduce the
frequency)
After synchronization observe all the parameters. If
parameters is ok then raise load depending on gas
pressure.
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61. Syn]hroniz[tion
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62. 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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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.

63. Som_ Working Mom_nts
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64. D[ily G_n_r[tion R_port
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65. Con]lusion
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66. Con]lusion
From my internship I acquired practical
knowledge about power system engineering and
its equipments.
Most importantly I have ggaatthheerreedd pprraaccttiiccaall
experience on how electricity is generated.
Therefore, I believe I made good achievements
with my industrial training which will help me a lot
in my future.
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