2. Content
• About the company
• Gas turbine
• Steam turbine
• HRSG
• Transmission system
3. About The Company
CONFIGURATION ( Pragati Power Station – 1)
Gas Turbines 2 x104 mw (open cycle) + Steam Turbine of 1 x 122mw
(combined cycle) = 330 mw(total)
Constructed on ash filled area of 17 acres
Sewage treated water from stps being used – no
water from river yamuna is used.
The main function of IPGCL is generation of electricity
and its total installed capacity is 735.0 mw including
pragati power station
4. STATION
Rajghat Power
House
I.P. Gas Turbine
Power Station
Pragati-I Combined
Cycle Gas Power Station
Pragati-III Combined Cycle
Gas Power Project, Bawana
Capacity (MW) 135 270 330 1500
Units (MW) 2x67.5
6 x 30 (GTs)
+
3 x 30 (STGs)
2 x 104 (GT*s)
+
1 x 122 (STG*)
4 x 250 (GTs)
+
2 x 250 (STGs)
Commissioning 1989-90
1985-86 (GTs)
+
1995-96 (STGs)
2002-03
Synchronized on –
GT-1: 11th Oct., 2010
GT-2: 09th Feb., 2011
STG-1: 03rd Oct., 2011
Water River Yamuna River Yamuna
Treated water From
Sen Nursing Home &
Delhi Gate STPs
Treated water From
Rithala STP*
(GTs : Gas turbines ; STG : Steam Gas Turbine ; STP : Sewage Treatment Plant )
7. A gas turbine is a rotary machine, which consists of three main components:
1. compressor
2. combustion chamber
3. turbine
The air after being compressed into the compressor is heated either by directly burns fuel in it or
by burning fuel externally in a heat exchanger. The heated air with or without products of
combustion is expanded in a turbine resulting in work output, a substantial part, about two-thirds,
of which is used to drive the compressor. The rest, about one-third is available as useful work
output. A gas turbine extracts energy from a flow of hot gas produced by combustion of gas or
fuel oil in a stream of compressed air.
The turbine assembly is consist of following six major sections or groups
Air inlet section
Compressor section
Combustion system
Turbine section
Exhaust section
Support systems
8. Working Cycle Of Gas Turbine
Working cycle: Brayton cycle is the ideal cycle for the gas turbine
• 1-2 isentropic compression (in
compressor
• 2-3 const. pressure heat-
addition (in combustion
chamber
• 3-4 isentropic expansion (in
turbine)
• 4-1 const. pressure heat
rejection (exhaust
9. STEAM TURBINE
• A steam turbine is a mechanical device that extracts thermal energy from
pressurized steam, and converts it into useful mechanical work.
• The available heat energy of the steam first is converted into kinetic energy by the
expansion of the steam.
• The steam energy is converted mechanical work by expansion through the turbine.
• The expansion takes place through a series of fixed blades.
10. Working cycle
The steam turbine works on rankine cycle, the Rankine cycle is a thermodynamic cycle
which converts heat into work. The heat is supplied externally to a closed loop, which
usually uses steam as the working fluid.
11. Process 1-2: The working fluid is pumped from low to
high pressure, as the fluid is a liquid at this stage the
pump requires little input energy.
Process 2-3: The high pressure liquid enters a boiler
where it is heated at constant pressure by an external
heat source to become a dry saturated vapor.
Process 3-4: The dry saturated vapor expands through a
turbine, generating power.
Process 4-1: The wet vapor then enters a condenser
where it is cooled at a constant pressure and
temperature to become a saturated liquid.
12. Heat Recovery Steam Generator (HRSG)
•The Heat Recovery Steam Generator (HRSG) is a horizontal, natural circulation, single pressure,
water tube type steam generator with a single drum.
•It is unfired type and uses Gas turbine exhaust gases as heat source.
•It has been designed to generate superheat steam at temperature of 512 degree Celsius at a
Main Stream Value (MSV).
•It consists of following section :
a) Superheater section
b) Evaporator section
c) Condensate Pre heater (C.P.H) and components
d) Steel chimney
14. Generator
large plant substation
power
transmission
power
distribution
consumer
Generator converts the mechanical energy of turbine shaft into electrical energy for
use in an external circuit.
Transformer
Transformer is a device that transforms electrical energy form from one alternating voltage to
another alternating voltage without change in frequency
Distributed generation
