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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
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