GROUP: 01

Presentation on over all power management scenario of Bangladesh

& various types of Generation-Coal fired, HFO Power Plant, Gas
Turbine

Presented By Israt Jahan Bushra

Shaharior Anik Md. Sen Bin Mustafiz
Fahad Hossain Tanvir Ahmed
Md.Saiful Islam Mahmudul Haasn
Md. Salman Hossain Nahid Hasan
Nafis Shahriar Sakhwat Hossen 1
Contents-

▰ Introduction & History of Power Sector.

▰ BPDB-Bangladesh Power Development Board.
▰ Bangladesh’s Power Management Scenario.
▰ Thermal Power Plant( Barapukuria Coal Fired 525 MW)
▰ HFO Power Plant (katakhali 50 MW Peaking )
▰ Gas Power Plant ( Baghabari 71+100 MW )

2
 Introduction
Get separated from
Short History Of Power Sector In Bangladesh- Water development
board
Water +
Power EPWAPDA 1972 PDB
Development
board EPWAPDA: East Pakistan
Water and Power
Development Authority

Generation
Transmission PDB: Power Development
Distribution Board

3
 Bangladesh’s Power Management Scenario 2022

BPDB

GENERATION TRANSMISSION DISTRIBUTION

NWPGCL APSCL PGCB NLDC

EGCB

WZPDCL NWZPDCL DPDC NESCO DESCO BREB

4
Line Diagram of Power System -

5
Bangladesh Power Development Board

The Bangladesh Power Development Board (BPDB) is a government agency operating under
the Ministry of Power, Energy and Mineral Resources, Government of the People's Republic
of Bangladesh established in 1972.

Vission:
To Deliver Uninterrupted Quality Power.
Mission:
To secure continuous growth of electricity for sustainable development and ensure
customer satisfaction.
6
 Objectives & Services of BPDB

Objectives- Nature of services-

▰ To be engaged in implementing the development ▰ Mainly deals with generation.
program of the power sector. ▰ Observation the proper
▰ To adopt modern technology and ensure optimum transmission & distribution
utilization of fuel. management through transmission
▰ To purchase power as a Single Buyer from power & distribution Companies.
producers. ▰ BPDB -buys unit of electricity at
▰ To provide reliable power supply to customers. higher rate from plants but sells
at lower price for consumer
▰ To promote a work culture, team spirit and inventiveness facility.
to overcome challenges.
▰ To promote ideas, talent and value systems for
employees.
7
Basic Classification of Power Plant.

8
Installed Capacity of BPDB Power Plants (based on fuel)
as on April 2022

9
Installed Capacity of BPDB Power Plants (based on
different sectors) as on 9th March 2022

Public Sector Number of Power Plant Installed Capacity(MW)

BPDB 38 6013

APSCL 5 1294

EGCB 3 957

NWPGCL 7 1401

B-R Power Gen. 1 149

RPCL 3 182

SubTotal 57 9946MW (44%)

10
Private , Import & Joint Venture Power Plants-(Running)

Private No of Capacity( Joint No of Capacity(

Plants MW) .Power
Import
Capacity
(MW) Venture plants MW)
IPPS 63 8457 BCPCL 1 1244
Bheramara 1000
(HVDC) Sub total 1 1244MW
SIPPS 4 99
Tripura 160 (4%)
SIPPS 9 251
Sub total 1160MW
15 year 4 169 ( 5%)
rental
3/5 Year 12 920
Rental Total Capacity 22,296 MW
SubTotal 92 9896MW
(46%) IPPS=Independent power producer & Supplier 11
SIPPS=Small Independent Power Producer & Supplier
 Future Plan of BPDB
When PDB starts its journey in 1992 the installed capacity was only 200MW which
make 3200MW in 2005/2004. Now the installed capacity has a growth about
22787MW, with the increasing amount of demand in Bangladesh the proposed
Generation capacity

12
Large scale power station planned up to 2035

Source : PSMP 2010

13
Investment Requirement for New Generation, Transmission &
Distribution (High Case)in billion US$

Generati Transmissi Distrib

Year Total
on on ution

2017-
56 13 12 82
2025
2026-
38 5 7 50
2030
2031-
27 6 7 40
2035
2036-
29 6 9 44
2041

Total
150 31 35 216
(2017-41)

Source: Revisiting Power System Master 14

Plan (PSMP) 2016
Bangladesh’s electricity mix, 2041 vs. 2018

15
Sub-regional cooperation in the power sector

1.Indo-Bangla-Bhutan co-operation in hydroelectric power sought

2.1200MW form The Rampal Power Station( NPTC India)

3.There is a proposed project argument supposed to be introduced

by Nepal- Bangladesh - China

16
 Present Challenge and Development plans
 It was intended by the
government to produce 35%
Best use of Natural Gases electricity based on coal in
(Established coal dependent according to Power System
Demand and Supply
plants for minimize the pressure Master Plan 2016 (PSPM 2016a,
Matching PSPM 2016b)
of natural gas crisis)

Reduce System losses. At presents

Introduce Renewable system loss is 10.9%, which was
Energy 45% in 1992-1993

Increase the efficiency

17
Step to increase Energy Efficiency

Setting Fuel Saving target for energy

efficiency and master plan : 2030- 20%

Provide loan to green industry

Incorporate fuel saving provisions in BNBC

Provide low interest loans in industrial

buildings and residential sector to buy Energy 18
Efficient Tools
Thermal Power Station

Barapukuria Coal Fired Thermal Power Station

(525MW)

19
Barapukuria Coal Fired Thermal Power Station

• 1st coal fired thermal power station

of BD
• In operation since 2006
• Net Capacity 525 MW
• Operated by BPDB

20
Generating Units & Coal Characteristics

21
Thermal Power Station

Heat energy
Electrical
of coal
combustion
energy

22
Characteristics Of Coal

Material %Percentage

Fixed Carbon 48.2

Volatile Matter 29.2

Ash 12.4

Total Moisture 10
Total Sulpher < 0.53

Gross Calorific Value 6200 - 7000 kcal/kg(Approx.)

23
FLOW DIAGRAM

24
Boiler & Boiler Furnace

Fig. Boiler Furnace

25
Turbine(Unit 1 & 2)
▰ Unit 1&2
▰ Model: 125-14/535/535
▰ Rated Output: 125 MW
▰ Rated Speed: 3000 r/min
▰ Inlet Steam Pressure: 14 MPa (a)
▰ Reheat Steam pressure: 2.14 MPa (a)
▰ Exhaust pressure: 7 KPa (a)
▰ Inlet Steam Temp.: 535 ᵒ C
▰ Reheat Steam Temp.: 535 ᵒ C
▰ Cooling Water Temp.: 30 ᵒ C

•▰ Unit 3
Manufacturer: Shanghai Turbine Company, Ltd. China
 Model.: N300-16.7/537/537

 Type: Sub-critical, Single Reheat, Two Casing and Two exhaust condensing Turbine

 Rated capacity : 300 MW

 Rotation: Clock wise looking from turbine to Generator

 Speed (RPM): 3000

26
 Manufacturer: Harbin Turbine Co. Ltd.
Description of Barapukuria Turbine

27
Turbine (Cont.)

28
Generator-

29
Technical Data of Generators
UNIT 1 & 2 UNIT 3

MODEL QFS –125-2 QFSN–300-2

Rated Capacity 156.25 375
(MVA)
Active Power (MW) 125 300

Stator Voltage (kV) 13.8 20

Stator Current (A) 6537 10825.3

Rotor Current (A) 1750 (627No load) 2764

Rotor Voltage (V) 275 (88 No load) 357

Speed (RPM) 3000 3000

Manufacturer Shanghai Turbine Harbin Generator

Generator Co. Ltd. Co. Ltd.

30
UNIT TRANSFORMER (Unit # 1 & 2)

UNIT TRANSFORMER

Rating:13.8 KV/230 KV
MVA: 156.25 MVA, Oil Filled
Cooling System: ONAF
Three Phase
Manufacturer : Baoding Tianwei
Baodian Eectric Co. Ltd.

31
HFO Power Plant

Katakhali 50MW Peaking Power Plant

32
Katakhali 50MW Peaking Power Plant

Diesel engine based power plant

Fuels used in Diesel engine based power plant are
1. Diesel
2. Furnish oil
Cost
effective
Diesel is called LFO(low fuel oil)
Furnish oil is called HFO (heavy fuel oil).

This fuel is used in Katakhali

50MW Peaking Power Plant
33
HFO –Heavy Fuel Oil

Components-

88 % Carbon
10% Hydrogen
1% Sulphur
0.5 % H2O
0.1% ash ,
& may contain
dispersed solid or
semisolid particles

34
Basic Principle of Katakhali 50MW PPP

HFO burns inside the engine and products of the combustion act as
the working fluid to produce mechanical energy

Diesel engine drives the alternator which converts mechanical

energy into electrical energy

Chemical Mechanical Electrical

energy of Engine
energy
Generator
Energy
HFO

35
Generation Unit-

Engine Alternator

6 diesel engine each of the engine capacity is 8.7 MW 36

Generation Unit (Contd)

37
Generator-

Generator information
Number of generator 6
Generator apparent power 11,155 KVA
Rated power factor 0.8
Nominal voltage 11 KV
Rated current 585 A
Voltage adjustment range ±5 %
Frequency 50 Hz
Speed 750 rpm
Over speed 900 rpm
Cooling method Air
38
Three Phase Step Up Transformer

Bus Bar

39
Circuit Breaker- Circuit
Breaker

Break or make a circuit

under fault conditions.

Protect the electrical

equipment from short circuit
transient current.

40
Isolator

Isolator is a mechanical
switch which isolates a
part of circuit from system
as when required.

Electrical isolators
separate a part of the
system from rest for safe
maintenance works.

41
Current Transformer

Current
Transformer

1. 1.Used for Current Measure

2. 2.Used for protection purpose as well.er

42
Potential Transformer & Lighting Arrestator

Potential
Transformer

 Used for Measuring Voltage

Lightning
Arrester

Used for Thunder Protection 43

Single Line Diagram of Katakhali PPP

44
Auxilary System-

 Engine cooling
 Exhaust gas system
 Charge air system
 Control and monitoring
 Heavy fuel oil supply
 Starting and control air
 Water supply
45
Water Treatment Section

Raw water is
dematerialized in
water treatment unit.

46
Steam Generation System

47
HFO Storage System

To store water, lubricant oil,

heavy fuel oil(HFO) etc.

48
Digital Control Room

In this power plant,

the control room
updates their
generating voltage
every 15 minutes.

49
Overall Scenario
Locati on Katakhali, Rajshahi
Capacity 50MW
Type of machine 18V32/40 MAN Engine
Number of Unit 6
Capacity of Each Unit 8.7 M W
Production of Each Unit 7.8 M W

Type of Liquid Fuel Heavy Fuel oil

Evacuation Voltage 132 K V
Operating Voltage Range +10%, -20%
Manufacture Man Turbo Engine by Germany
Operating frequency 50 HZ(±3%)
Power Factor 0.8
Generator Voltage 11 K V
Service Voltage 0.4 K V 50
Gas Power Plant-

Baghabari 171 MW Power Station

51
Fundamental of Gas Turbine

FUEL 4 c = compressor
b = burners
2 b t = turbine

c t
GENERATOR

1 AIR

When the Brayton Cycle is worked out for a steady flow

process, we have a simple gas turbine cycle.
In a simple gas turbine cycle, combustion & exhaust occur
at constant pressure and compression & expansion occur
52
continuously.
Baghabari 171 MW Power Station

• Baghabari Power Plant is base load Plant.

• After synchronization it is Operated
continuously according to the demand of
National grid.
• Gas turbine is used.
• Air and gas mixture is the reason of
combusition
• Single shaft is used starting from the
auxiliary compartment to the turbine end Unit 01
Unit 02
(71MW)
(100MW
)

53
Generation Units

54
Main Components of Gas-Turbine

1. Air-Intake System.
2. Inlet Guide Van (IGV).
3. Compressor.
4. Combustion Chamber.
5. Turbine-Rotor.
6. Exhaust- Plenum or Chimney.
7. Generator.
55
Auxiliary Components of GT

1. Air-Filters. 8. Fin-Fan.
2. Lub-Oil Pump. 9. GT-Compartment Exhaust Fan.
3. Turning-Gear. 10. Load Gear Compartment Exhaust Fan.
4. Cranking Motor. 11. GT-Housing Cooling Fan.
5. Torque Converter. 12. Hydraulic Oil Pump.
6. Midst Eliminator. 13. Lift Oil Pump.
7. Cooling Water Pump 14. Compressor Bleed Heating.

56
 Inlet Guide Vane (IGV)

Functions
1. To regulate air-flow through Compressor at different conditions of GT.

2. At load condition of GT it follows exhaust temperature. It remains 57% open up to

a preselected exhaust temperature set point.

3. When exhaust temperature reach the set point it starts open further.

4.Thus with the increase of load it keeps on opening to maintain preselected set point. The Load
with full opening (84%) of IGV is called Base-Load.

5. If GT is selected for Peak-Load operation the preselected exhaust temperature set point shifted
to some higher value. Following such higher set value, Load with full opening of IGV is called
Peak-Load.
57
Turning Gear & Cranking Motor

Turning gear function :

Turning gear function is to rotate the gas turbine rotor during start-up, cool down, and when
needed during a maintenance inspection. During cool down, the turning gear system turns the
turbine rotor at about 100 rpm to prevent bowing of the turbine rotor and to protect the turbine
rotor and the unit bearings from thermal damage.

Cranking Motor
Function of Cranking Motor is to speed up the Turbine Rotor with the help of TC.

Condition to start:
1. Lub-Oil Pressure normal.
2. Hydraulic Oil Pressure normal.
3. Lift Oil Pressure normal.

58
 Gas Booster. Cooling water pump & Fin-Fan

Gas Booster

• a series of mechanical components that boost the pressure of natural gases.

• Gas booster systems are capable of compressing nitrogen.
• It can take the pressure of the gas to 18-24 bar of the gas having 10 bar of pressure originally.

Cooling water pump & Fin-Fan

Cooling water pump supplies cooling water to different coolers of GT. Fin-Fan cools worm water
return from GT . It is a closed cycle .

De-Mineralized water mixed with proportionate quantity recommended chemical (RD-11) usually
used in this process.

59
Cooling & Sealing Air system

The cooling & sealing air system provides the necessary air flow from the compressor
to the other parts of the gas turbine rotor & stator to prevent excessive temperature
buildup in these parts during normal operation and sealing of the turbine bearings.
Atmospheric air from external centrifugal blowers is also used cool the turbine exhaust
frame.

Cooling & sealing function provided by the system are :

1. Sealing of turbine bearings
2. Cooling the internal turbine parts subjected to high temperature
3. Cooling of the turbine outer shell & exhaust frame
4. Providing an operating air supply for air operated valves
5. Compressor pulsation protection

60
Gas Turbine Maintenance

Classification Gas Turbine Maintenance ; Dis-assembly Inspection can be classified into :

1. Standby Inspection 1. Combustion Inspection
2. Running Inspection 2. Hot Gas Path Inspection
3. Dis-assembly Inspection 3. Major Inspection

S/N Types of Inspection Interval

01 Combustion Inspection (CI) 8000 running hour or
600 fired start Whichever comes
earlier
02 Hot Gas Path Inspection 24000 running hour or
(HGPI) 1200 fired start Whichever comes
earlier
03 Major Inspection (MI) 48000 running hour or
2400 fired start Whichever comes
61
earlier
Transmission of Generated Power

 Generated Voltage is 11KV.

 Transformer is Delta –Y connected.
 Three individual Transformer act as a single three phase.
 Rating 35MVA (single).
 Convert 11KV/132 KV .

62
Line Diagram of Baghabari 171 MW Power Plant

63
Thank You

36