Presentation on Siddhirganj 2×120 MW PPP of EGCB_Faujul Kabir

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2Siddhirganj 2×120 MW Peaking Power Plant of EGCB

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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: egcb_ltd@yahoo.com

info@egcb.com.bd

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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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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

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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

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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

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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

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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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