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7/31/2019 Ddcmis Lecture
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• INTEGRATED PLANT CONTROL SYSTEM FORSG, TG AND BALANCE OF PLANT.
• INTEGRATED PLANT OPERATION THROUGH
FULLY INTERCHANGEABLE OPERTAOR WORKSTATIONS (OWS) FOR SG, TG AND BALANCEOF PLANT
• IT MAY BE REMEMBERED THAT THE TERM
DDCMIS USED TO BE REFERRED FOR THESO-CALLED “BOP - C&I” , THE “SG-C&I”, i.e.FSSS, BOILER PROTECTION AND “TG-C&I” i.e.ATRS, TURBINE PROTECTION etc.
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maxDNA
SYSTEM
HMI
REDUNDANT
SERVERS
RedundantF.G.Controllers
ENGG.STN.
FOR CONTROL SYS.
HMIENGG. STN
FOR HMI
PROCONTROL
SYSTEM
Measurement system / I/O
subsystem
I.P. BUS Max. 4nos. rdundant
MMI LAN
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• CONTROL SYSTEM
• MAN-MACHINE INFORMATION AND PLANT
INFORMATION SYSTEM (MMIPIS)
• REDUNDANT DATA COMMUNICATION SYSTEM(DCS).
• MASTER & SLAVE CLOCK SYSTEM.
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• SEQUENCE OF EVENT (SOE ) ANDANNUNCIATION SYSTEM FUNCTIONS.
• SYSTEM PROGRAMMING FACILITY:-
a) TUNING & CONFIGURATION FOR
CONTROL SYSTEM.
b) MODIFICATION & PROGRAMDEVELOPMENT FOR MMIPIS.
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PROCONTROL P13/42 CONTAINS A BUSSYSTEM:-
• P-42 REPRESENTS INTRA PLANT BUS, IS
RESPONSIBLE FOR SIGANL TRANSPORT.
• P-13 REPRESENTS LOCAL BUS, ISRESPONSIBLE FOR SIGANL CONVERSION AND
SIGNAL PROCESSING.
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CONTROL SYSTEM
PROGRAMMING & MMIPIS M & S
CONFIGURATION SYSTEM CLOCK
SG- C&I BOP- C&I TG- C&I
SYSTEM SYSTEM SYSTEM
DCS
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SG-C&I SYSTEM
SG-C&I SYSTEM CONSISTS OF :
1. BURNER MANAGEMENT SYSTEM (BMS).
2. SOOT BLOWER CONTROL SYSTEM (SBC).
3. SECONDARY AIR DAMPER CONTROL SYSTEM(SADC).
4. AUXILIARY PRDS CONTROL SYSTEM (APRDS).
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TG-C&I SYSTEM FEATURES
• TRIPLE REDUNDANT OR 2 X 100 % REPEATEDTWICE CONFIGURATION FOR THE TURBINE
PROTECTION SYSTEM (TPS). FOR THIS,SAFETY SYSTEM HARDWARE OR FAIL-SAFEHARDWARE SHALL BE USED.
• FOR OTHERS, CONFIGURATION SIMILAR TO
OLCS/CLCS TO BE USED.
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BOP-C&I SYSTEM
BOP-C&I SYSTEM CONSISTS OF :
1. OPEN LOOP CONTROL SYSTEM (OLCS).
2. CLOSED LOOP CONTROL SYSTEM (CLCS).
OLCS INCLUDES THE SEQUENCE CONTROL ANDTHE INTERLOCK OF ALL THE PLANT SYSTEMS
WHICH ARE NOT COVERED IN SG-C&I AND TG-C&I.THIS INCLUDES MAJOR AUXILIARIES LIKE FD/ID/PAFANS, AIR-PREHEATER, BFP/CEP/CWP/ BCWP/ DMCWP/CLCWP AND ELECTRICAL BREAKERS.
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MAN-MACHINE INTERFACE AND
PLANT INFORMATION SYSTEM• LATEST STATE-OF-THE-ART WORKSTATIONS
/PCs AND SERVERS BASED ON OPEN-
ARCHITECTURE AND INDUSTRY STANDARDHARDWARE AND SOFTWARE TO ENSUREBETTER CONNECTIVITY.
• HARDWARE FROM COMPAQ/DIGITAL, HP, SUN
MICRO-SYSTEM OR OTHER MAJOR SUPPLIERS• OPERATING SYSTEM WINDOWS-2000, OPEN-
VMS OR UNIX.
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MAN-MACHINE INTERFACE AND
PLANT INFORMATION SYSTEM• 64/ 32-BIT SERVER/OWS WITH HIGH-SPEED AND
LARGE MEMORY (256/512 MB RAM, 8 GB HDD FORSERVER AND 128/256 MB RAM AND 4/6 GB HDD FOROWS) TO ENSURE FAST RESPONSE.
• PROVISION OF LVS (LARGE VIDEO SCREEN).
• CONNECTION TO OTHER SYSTEM THROUGHSTATIONWIDE WAN.
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• VPC OPERATION
• OTHER OPERATOR INFORMATIONS THROUGHVARIOUS DISPLAYS
• ALARMS, LOGS, HISTORICAL AND LONG TERMSTORAGE.
• PERFORMANCE AND OTHER CALCULATIONS
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SEQUENCE OF EVENT (SOE )
AND ANNUNCIATION SYSTEM FUNCTIONS
• ORIGINALLY THESE USED TO BE STAND-ALONESYSTEM (DIODE AUCTIONEERING, DBTC ETC
REQUIRED)• NOW INTEGRATED -THEREFORE THE DIODE
AUCTIONEERING, DBTC ETC NOT REQUIRED.
• SOE - 1mS RESOLUTION, STORAGE OF REPOTS
FOR LONG DURATION• ANNUNCIATION LOGIC THROUGH OLCS/CLCS
CONTROLLERS.
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• Event Activated logs
– SOE
– Post Trip Log
– Start-Up Log
• Time Activated Logs
– Daily Log
– Shift Log
• Maintenance Data Log
• On Demand Logs
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• Displays all the alarms in the order of theiroccurrence
– Useful for analysing the cause of the major
failures. – All digital DATA and Analog values crossing the
limits will be displayed in this window in the orderof their occurrence.
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REAL TIME TREND
• Operator can configure the required points for realtime trending purpose and can see the real time
trend and in case of any deviation (abnormalchange) can react quickly.
OPERATOR GUIDANCE MESSAGES
• Operator Guidance messages can be displayed onthe DAS monitors when rolling or any importantactivity is going on.
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• CPU
• I/O CARDS
• CRTS
• PRINTERS
• NETWORK
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* Di it l I t M d l
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* Digital Input Module
Process 16 Digital Inputs
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* Analog Output Module
4 Outputs
Outputs are short circuit protected
Scan time 8 millisecond
Resolution 12 Bit
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* Digital Output Module
16 Outputs are available
Contact Rating
5 A 240 V AC
3 A 30 V DC
0.3 A 110 V DC
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SYSTEM
PROGRAMMINGFACILITY
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SYSTEM PROGRAMMING FACILITY
• LATEST TREND - COMBINED CONTROL
SYSTEM TUNING & MMIPIS PROGRAMMING
• SELF-DOCUMENTATION
• ENGINEERING WORKSTATIONS
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• Graphical object-orientedconfiguration software tool.
• Includes self-documentation
of configuration.• True object-orientedfeatures includingencapsulation and
inheritance.• Library of standard
algorithms or “objects”.
C
Object-Oriented Configuration
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• POWER SUPPLY SYSTEM
• CABLING & TERMINATION OF SG/TG C&I SYSTEM/
EQUIPMENT.
• OPERATION PHILOSOPHY , CONTROL AREA AND
BACK-UP INSTRUMENTATION & GEOGRAPHICAL
DISTRIBUTION - COMBINED CYCLE PLANTS.
• REDUNDANCY
• DESIGN CRITERIA
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CONTROL SYSTEM POWER SUPPLY
• TWO SETS OF DC POWER SUPPLIES - ONE SET FORSG/TG-C&I AND OTHER FOR BOP-C&I EACH WITH 2 X100 % CHARGER AND 2 X 100 % BATTERY.
• OTHER IMPORTANT AC LOADS LIKE MMIPIS, PANELINSTRUMENTS, ANALYSERS ETC. SHALL BEPOWERED FROM UPS COMPRISING OF 2 X 100 %CHARGER, 2 X 100 % INVERTER AND 1 X 100 %
BATTERY.• HEAVY DUTY Ni-Cd BATTERIES HAVE BEEN
ENVISAGED FOR LONGER LIFE & LESSERMAINTENANCE
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• EXTENSIVE GROUPING OF SIGNALS BY LARGE
SCALE USE OF JBs AT STRATEGIC LOCATIONS.
• USE OF CABLES WITH HIGHER NO OF PAIRS.
• USE OF CAGE-CLAMP CONNECTION FOR SYSTEM
CABINETS, MARSHALLING PANELS & OUTGOING
SIDE OF JBs, CJS BOXES etc.
• USE OF PLUG-IN SOCKET AND CONNECTORS FORTRANSMITTERS, SWITCHES, LS/TS etc.
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• FLAME MONITORING SYSTEM• COAL FEEDER C&I• ELECTROMATIC SAFETY VALVES• FURNACE TEMP PROBES• ACCOUSTIC PYROMETER FOR FURNACE TEMP PROFILE• BOILER FLAME ANALYSIS SYSTEM• COAL BUNKER LEVEL MONITORING SYSTEM• ELECTRONIC DRUM LEVEL MONITORING SYSTEM
• TURBINE SUPERVISORY SYSTEM• TDBFP TURBINE SUPERVISORY SYSTEM
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• CENTRALISED OPERATION OF MAIN PLANT THROUGHOWS / LVS.
• OFF-SITE PLANTS TO BE CONTROLLED FROM THEIRLOCAL STATIONS WITH STATION-WIDE LAN DATA LINK.
• MINIMUM BACKUP INSTRUMENTATION.• GEOGRAPHICAL DISTRIBUTION - ALTHOUGH NOT VERY
USEFUL FOR POWER PLANTS AS COMPARED TOPROCESS/INDUSTRIES, BEING ADOPTED FOR FEW
AREAS WHERE SIGNALS ARE CONCENTRATED.• REDUCTION OF CABLING, MUCH LESS ERECTION &
COMMISSIONING TIME.
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• PROVENNESS
– SUPPLIER’S EXPERIENCE
– SYSTEM EXPERIENCE
– PROVENNESS VS OBSOLESCENCE
• RELIABILITY AVAILABILITY
– HARDWARE QUALITY (PUBLISHED MTBF etc.)
– CONFIGURATION
– REDUNDANCY
– FAULT TOLERANCE
• STANDARDISATION AND UNIFORMITY OF H/W
– SAME SERIES & FAMILY OF H/W AS FAR AS POSSIBLE
– DIFFICULTIES BECAUSE OF PACKAGING CONCEPTS &RESPOSIBILITY CENTRE & INTERFACES.
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• OPERATABILITY – DESIGN CONCEPT - FAIL SAFE ETC. – FALSE TRIP VS SAFETY – OPERATOR CONVENIENCE DURING NORMAL RUNNING &
EMERGENCY – MANAGEMENT REPORTING
• MAINTAINBILITY
– STANDARDISATION (AS INDICATED ABOVE) – MODULAR DESIGN AND EXPANDABILITY – DIAGNOSTIC, FAULT IDENTIFICATION AND FAULT TOLERANCE – GUARD AGAINST OBSOLESCENCE – AVAILABILTY OF SPARES
• OTHER CRITERIA – UNIT OPERATION PHILOSOPHY – MARKET TRENDS AND EVOLUTION OF INFORMATION
TECHNOLOGY – FEEDBACKS FROM EXISTING SYSTEMS
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