Summer Training 2010Summer Training 2010inin

Dholpur Combined Cycle Power Dholpur Combined Cycle Power Project (DCCPPProject (DCCPP))

Submitted By: JITESH SHARMA

INTRODUCTIONINTRODUCTION

To Dholpur Combined Cycle Power Project (DCCPP)

DCCPP is project of Rajasthan Vidhut Utpadan Nigam Ltd setup in 2007

Plant capacity is 330 MW (2 Gas Turbine 110MW each and 1 Stream Turbine 110 MW)

Liquid Natural Gas (LNG) is used as main fuel with more than 70% utilization

An important load center for eastern Rajasthan

PLANT FEATURESPLANT FEATURES

Waste heat from the Gas Turbine is recovered by a Heat Recovery Steam Generator (HRSG).

MARK- 6 control system.

Less pollution.

COMBINED CYCLE POWER COMBINED CYCLE POWER PLANTPLANT

ADVANTAGE -: High thermal efficiency Low water requirement Environmental friendliness Fast start-up Low installation cost

COMBINED CYCLE POWER COMBINED CYCLE POWER PLANTPLANT

Disadvantage-: Low thermal efficiency in open cycle Higher cost of generation Higher maintenance cost

PROCESSPROCESS

First of all 800,000 cubic feet per minute air is inserted into the gas turbine where it is compressed , mixed with natural gas and ignited in combustion chamber . Thus the pressure generates. This pressure spins the turbine blades. These blades are attached to a rotar, which spins the generator and make

185 mw electricity.

BASIC CIRCUIT DIAGRAM OF PLANTBASIC CIRCUIT DIAGRAM OF PLANT

PLANT LAY OUTPLANT LAY OUT

HEAT RECOVERY STEAM HEAT RECOVERY STEAM GENERATOR (HRSG)GENERATOR (HRSG)

It is a heat exchanger that recovers heat from a hot gas stream

There are two boiler drums in HRSG It consist of three major component 1) Economizer 2) Evaporator 3) Super

heter

WORKING OF HRSGWORKING OF HRSG

Water comes in economizer and temperature of water increased

Water supplied to boiler drum then evaporator in this water is converted into steam. this is wet steam

Steam pass through super heaters Dry steam is supplied to boiler drum. Then steam

turbine

GAS TURBINEGAS TURBINE

In this shaft speed is 3000 rpm It extract energy from hot gases produced by

combustion of gas

STEAM TURBINESTEAM TURBINE

Running by combined steam of HRSG It convert kinetic energy into mechanical energy It works on Rankine cycle

Having higher efficiency then

steam engine

WORKING OF STEAM TURBINEWORKING OF STEAM TURBINE

Steam enters in the turbine with high pressure and temp.

Pressure used to spin of turbine blades Residual steam leaves the turbine at low

pressure This steam passed into a condenser

WORKING OF A WORKING OF A COMBINED CYCLE COMBINED CYCLE

POWER PLANTPOWER PLANTDCCPP located at Dholpur has an unique feature that the same energy source (i.e. natural gas) is used to rotate both gas and steam turbine without wasting much of energy. As the name implies it is a combined cycle i.e. waste heat from the gas turbine is recovered by a heat recovery steam generator to power a conventional steam turbine in a combined cycle configuration.

CONDENSERCONDENSER

Situated below turbine Purpose is to turn low energy steam back

into water for use in HRSG 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

maxDNAmaxDNA - BASIC COMPONENTS - BASIC COMPONENTS

MAXNET Network

MAXSTATION

Remote Processing Unit

IO

SIGNALS

DPU

IO

IO

IO

IO

IO

IO

IO

IO

IO

IO

DPU

DPU

Switch A

Switch B

DPU(Distributed Processing DPU(Distributed Processing Unit)Unit)

10 ms I/O and function Block processing time

8500 function block for high capacity complex control

Multiple execution speed to make the best use of the processor

Standard serial port link for communication

Dual 100 mbps highway connection for high speed

Physical CapabilitiesPhysical Capabilities

Addresses: 255I/O Bus Length: 30 ftI/O Bus Length With BEM: 6,500 ftNumber of I/O Modules per DPU: 125Number of SOE Modules per DPU: 32

Operating Ambient Temperature: 0°C to +60°C (local to DPU)

Relative Humidity: 5% to 90% non-condensing

Control Processor: National Geode, 128 mByte RAM, 64 MByte Compact FlashElectricalSystem Power: 24 ±4 VdcCurrent: 1.2 A @ 24 VdcModel No. PDP401 - maxDPU4F

240V AC to 24V DC converter

Cooling Fan Rack

Rack 1

Rack 2

Rack 3

Primary DPU

Sec. DPU

IO modules

Connectors

CONTROL PANEL HARDWARES

Power Supply Module

Network A port

Network B port

DPU Backup Cable

Network Healthy

Backup Indication

Reset Button

Takeover Button

Mode Switch

Run - F

DPU 4F

Dongle Card

DONGLE CARD

• LICENCE KEY TO USE MAX DNA SOFTWARE

• INSTALLED ON COM PORT WORK STATIONS

• DIFFERENT SOFTWARE FOR EWS/OWS DONGLE

Physical CharacteristicsPhysical Characteristics

The maxDPU4F resides directly on the maxNET communications network without the need for servers. It is fully compatible with max DNA, max PAC I/O, MAX 1000 + PLUS and most MAX1000 Model 564 I/O. The maxDPU4F mounts in a single wide slot in a max PAC 8 PAC rack.

DC SYSTEM & PLC DC SYSTEM & PLC COMMUNICATIONCOMMUNICATION

SWITCH YARD BATTERY BANK ELECTROLYTE-

1.mixture of acid & pure water

2.genral proportion is 85% water & 15% acid.

PLCC (Power line carrier

communication )

Working of PLCCWorking of PLCC

The voice freq. if converted into electrical signal these signal are super imposed & transmitted through a coupling capacitor (cc). At the receiving and wave trap don’t allow the modulated signal to enter power ckt. through CC the signal is given to the line matching unit . After matching freq. filtration of signal is done.

Various electronics Various electronics components & their utilizationcomponents & their utilization

Simulation of section-simulate a value while online is used to isolate a proper section . In process machine works on simulate value instead of out come data.

RTD (Resistance temp detector) – RTD modules or cards are used to convert resistance in form of temp. cards are placed in panel of DPU.

PANEL CARDS CHANNEL DESTINA

TION(RTD)

other devices are-ThermocouplePressure gauges

Fan’s arrangement forFan’s arrangement forcooling towercooling tower

Presented By:-Presented By:-

JITESH SHARMA

THANKTHANK YOU YOU