Distributed Digital Control Monitoring & Information System
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Transcript of Distributed Digital Control Monitoring & Information System
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ALOK SINGHVII Sem ,EIC
Based on Industrial Training at NTPC,BadarpurPresentation Distributed Digital Control Monitoring & Information System
Distributed Digital Control Monitoring & Information System (DDCMIS)Consists of Closed Loop Control System (CLCS), open Loop Control System (OLCS) Man Machine Interface and Plant Information System (MMIPIS), Measurement System.Sequence of Events Recording System (SERS) Slave Clock
BASIC FEATURESCRT's100% Interchangeable CRT'sAny function can be performed on any CRT Complete control, monitoring, supervisory and display functions Displays bar graph group displays system alarms real time trend
Types of Control Schemes Closed Loop Control System (CLCS) Open Loop Control System (OLCS)
Hardware for CLCS and OLCS are separate and independent of each other
Computerised Data Acquisition System (DAS)
Main purpose - acquire sensor data and to produce displays and hard copies .
Combines special hardware and software
Facilitates interfacing between plant and operator
Performs plant performance calculations and process monitoring.
BLOCK DIAGRAM OF DAS
RecorderPrinter,Display,Meter,Magnetic Tapes,Computer
Objectives of DASMonitor process operation to maintain on line safe operation. Enhance plant life by helping identifying problem areas. Increase eficiency of operation. Increase the reliability and availability of the process. Provide proper historical records Provide plant performance figuresProvide facility for easy monitoring and proper tuning of automatic controls.
BLOCK DIAGRAM OF TYPICAL DAS CONTROL ROOM
DAS- AdvantagesData acquired -lower cost & with less complex instrument
Advantages : Data acquisition , etc. at higher speeds with greater precision. Data generated is selective and arranged to facilitate further processing.Reliability of data is improved.
Various Data LoggingTurbine Run on log Boiler start up log Hourly log Turbine and generator diagnostic log Post trip analysis log Maintenance log Turbine shut down analysis logPerformance log
plant
engineeringworkstationoperatorworkstationdata loggercontrollercontrollercontrollercontroller
field busplant bus
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