The document provides information about the 330 MW Dholpur Combined Cycle Power Project (DCCPP) in India. It consists of 3 units of 110 MW each. The plant uses re-liquefied natural gas as fuel. It uses both a gas turbine and a steam turbine for power generation by utilizing the waste heat from the gas turbine in a heat recovery steam generator to produce steam for the steam turbine. This combined cycle configuration improves efficiency by capturing unused heat energy.

1. A
Training seminar
on
Dholpur Combined Cycle Power Project
Global College of Technology
Submitted To
Mr. Govind Soni
Asst. prof. EE Deptt.
GCT JAIPUR
Submitted By
Yuvraj Singh
14EGCEE037
EE Deptt.

2. Contents
• Introduction
• Working of DCCPP
• Water And Steam Flow
• Gas turbine
• Heat Recovery Steam Generator
• Steam Turbine
• Condenser
• Switchyard
• Control room

3. Introduction
 DCCPP is 330 MW combined cycle power
plant .
 3 Units in DCCPP each of 110 MW.
 The main equipment were supplied by BHEL .
 The main fuel used for this plant R-L-N-G
(Re-Liquefied Natural Gas) which will be
supplied by GAIL .

4. Units Configuration
Total station capacity is 330 MW .
TYPES OF TURBINE LOAD
GAS TURBINE-1 96.931 MW
GAS TURBINE-2 92.706 MW
STEAM TURBINE 95.796 MW
TOTAL LOAD - 285.31 MW

5. Working of the combined cycle
power plant
• DCCPP has an unique feature that the same
energy source is used to rotate both gas and
steam turbine without wasting much energy.
• Combined cycle means waste heat from the
gas turbine is recovered by a Heat Recovery
Steam Generator (HRSG) and transfer to the
steam turbine.

7. Gas Cycle Configuration DCCPP

8. GAS TURBINE
 It works on idealized Bray ton cycle .
 It extract energy from hot gases produced by
combustion of gas.
 In this shaft speed is 3000 rpm.
 5 stage turbine arranged on common shaft
with 18 stage compressor and a generator.

12. HEAT RECOVERY STEAM GENERATOR
 It is also known as Waste Heat Recovery
Steam Generator (WHRSG).
 It is a heat exchanger That recovers heat from
a hot gas stream.
 There are two boiler drums in HRSG.
 Water supplied to boiler drum then
evaporator in this water is converted to steam.
 Steam pass through super heaters .
 Dry steam is supplied to water drum Then
steam turbine.

13. STEAM TURBINE
 In steam Turbine Shaft is rotated
continuously.
 By impact reaction of steam as working
substances on blades of turbine .
 It converts potential energy or heat
energy into mechanical energy .
 Steam turbine is started by burnt
exhaust gases coming out from HRSG.

15. CONDENSER
 Situated below turbine.
 Purpose is to turn low energy steam back into
water for use in WHRSG.
 Maintain proper flow of steam .
 In general improve the efficiency of plant.
 Air and non-condensable gases, which have
corrosive action are removed by dry air
pump.

17. SWITCHYARD AND
TRANSMISSION EQUIPMENTS
 Transformer
 Isolators
 Circuit Breakers
 Wave Trap
 Lightning Arrestors
 Current Transformer
 Potential Transformer
 Ground Wire etc.

18. CONTROL ROOM
 In control room various controls are
provided simultaneously and various
measurement are provided here.
 In control room all the control panels are
sensitive.
 Control room panel
 Fan control desk
 Fuel control desk
 Steam water desk
 Turbine desk
 Generator control panel.

21. ADVANTAGES OF COMBINED CYCLE
PLANTS
 High Efficiency
 Low Cooling Water Requirement
 Fast Start
 Low Environment Pollution
 Low Cost

22. DISADVANTAGES OF COMBINED
CYCLE PLANT
 Low efficiency in open cycle
 Higher cost of generation
 Higher maintenance cost