Controls & Instrumentation
description
Transcript of Controls & Instrumentation
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1/16/2012*
CONTROLS & INSTRUMENTATION
FOR
660 MW SUPERCRITICAL UNIT @ Tiroda
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Road Map
Instrumentation at Tiroda Power Plant
Feedwater Control
Automation technologies
IT Integration
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INSTRUMENTATION @ TIRODA
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Application of Technology
TechnologyApplicationSMART / HARTTransmitter / PositionersIR sensorsFlame Scanner & CHP Conveyor fire detectionPiezoelectric sensorsCompressor system3D Imaging level measBunker level MeasCCTVFlame MonitoringAcoustics SensorBTLDSWireless TransmitterRemote flow measMODBUS/OPCThird Party Interface
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Boiler Tube Leakage Detection System :Available Schemes : Accoustic Conductivity Mass Balance
Accoustic Detection @ Tiroda- Enhanced Sensors for Noise signal measurement and elimination
Boiler tube leak prediction through an analysis of acoustic frequency spectrum by Quick Fourier Transformation
Location and intensity of leak identification
Operator to take measures immediately to prevent the accident from worsening thereby reduce the time and cost spent on the repair
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High temperature resistant optical system consists of quartz and corundum, which can be normally operated in a certain amount of purging air.
Screen menu setting, remote control in central control room, for forward and retract movement of camera.
Horizontal mounting and large field angle probe
- System is equipped with automatic forward and backward protection device, which can automatically withdraw from furnace when no pressure in cooling air.Furnace TV :
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FEEDWATER CONTROLThe key differentiator between subcritical and supercritical
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008 406p
Ts-Tsat
TDeg. of Super HeatFeedwatercontrolFWTPFeed Water ControlWW
Eco
BCP
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SUBCRITICAL (DRUM)Low Load Single Element Level Control
Higher Load Three Element Level Control
SUPERCRITICAL (ONCE-THRU)Wet Mode BCP in recirculation mode for Load < 30 %
Levelling Vessel Level Control
Feedwater to Coal Flow ratio = (7 to 9) : 1
Dry Mode BCP stopped for Load > 40%
Feedwater to Coal Flow ratio = (7 to 9) : 1
Flow control based on degree of
superheat (21-35 deg)Feed Water Control
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Feed Water Control
From Water Wall O/LFrom Water Wall O/LSeparator Tank ALevelling VesselTo SuperheaterTo SuperheaterTo BCPTo CondensorTo SH SprayTo SH SpraySeparator Tank - B
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Main objective in Super Critical Boiler FW control system is a) To maintain Level of the Levelling Vessel at Wet Mode
b) To maintain Deg. Of Superheat at Separator Outlet
c) To maintain FW flow to Fuel Flow Ratio Feed Water Control
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Levelling Vessel Level Control by-
Feed Water ControlBCP
CV to 1st stage DSH waterDrain CVs to CondensorFrom Separator-BBCP DischargeCV to Eco. I/LLevelling VesselFrom Separator-ADrain CVs to OAC/Waste
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Degree of Superheat is maintained in the separator outlet in the range of 21 - 35 degC
Why Degree of Superheat ?> 35 deg C : May lead to overheating of water wall tubes.
< 21 deg C : May lead to flow of wet steam to SH coils.
Note : Bias for degree of superheat > 21 degC is in Operators controlFeed Water Control
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Separator O/L Temperature ControlPIDSeparator O/L Temperature - TsSeparator O/L PressF1(x)PIDTDBFP MasterCommandFeedwater FlowFuel FlowF2(x)Temp Correctionblock
XY01201234019.5377....
XY0010366323616383202285....Deg of SH + TsatPVPVSPSPDesired FW Flow
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AUTOMATION TECHNOLOGIES
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AUTOMATION TECHNOLOGIESConventional
PLC
DCS with local IO & limited processing capabilities
Speed limited to backplane communication
Server Based architecture
Statement based Logic configuration
Latest
Advanced PLCs
DCS with remote IO Capability **
TCP/IP communication upto 1Gbps
Mesh Topology for reliable network
Graphical Drag and Drop facility for logic configuration
** Used for Metal Temperature Thermocouples,CWPH, CT, FOPH, Compressor system
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MESH NETWORK
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DCS DETAILSFoxboro Invensys IA System with IACC
Controller : FCP270 with Direct 100 Mbps Ethernet fiber connection and fault tolerant configuration. Number of Controllers : 27 per Unit
IO Modules : Supports all types of measurement inputs with optical isolation integrated in applicable cases. Number of IO Modules : 1400+ per Unit
Termination Assemblies : Field signal connection modules, which provide optional signal conditioning and circuit protection
Logic Configuration Software : Uses IA configuration component which is graphical based user interface
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BOILER MFT TRICONEX
TRIPLE MODULAR REDUNDANT SYSTEM
HARD WIRED BACKUP RELAY PANEL
TUV SIL3 CERTIFIED
PROGRAMMING SOFTWARE :
(Tristation 1131 Standard Programming) Class (IEC61131-3 )
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1. Availability of online data-a) For Operatorb) For Management at Tirodac) Corporate Office d) Other OEMs for analysis purpose of their equipments2. Resulting in better analysis of problems by experts and quicker solutions.3. Improved efficiency due to high speed processing of various I/Os.4. Reduction in outages due to highly automated and reliable control system, leading to increased PLF and availability.5. Online performance calculation of 660MW Unit.6. Latest technology enables predictive maintenance.7. Reduction in Man/Megawatt Ratio.Benefits of Latest Technology
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IT INTEGRATION
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IT INTEGRATION
Management Information System ( MIS ) interface with external world and office automation system
Remote access/troubleshooting of vibration monitoring system
Integration with SAP
SMS alerts on Equipment Trip / Alarms
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Thank You!!
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