Presentation Transcript
DISTRIBUTED CONTROL SYSTEM ( DCS ) FOR THERMAL POWER PLANT :DISTRIBUTED CONTROL SYSTEM ( DCS ) FOR THERMAL POWER PLANT SHIVAJI CHOUDHURY
OBJECTIVE OF DISTRIBUTED CONTROL SYSTEM(DCS) :DCS OBJECTIVE OF DISTRIBUTED CONTROL SYSTEM(DCS) Safe operation of plant
Lowest cost of generation
Longest equipment life
Minimum environmental effect
Maximum efficiency
Energy conversation
BENEFITS OF DCS :DCS BENEFITS OF DCS High reliability
Improved response time
Improve operator interface to plant
Improve accessibility of plant data to engineering & management personals
Historical storage and retrieval system
DCS HARDWARE :DCS DCS HARDWARE Controller card
Input cards (4-20mA, Thermocouple, RTD,Digital,SOE).
Output cards(4-20 mA ,digital)
Power supply module.
Communication card
Cables
Controller with input/output card
MAN MACHINE INTERFACE :DCS MAN MACHINE INTERFACE CRT/TFT MONITOR (OPERATOR WORK STATION)
LVS (Large Video Screen)
PRINTER
DCS Architecture :DCS DCS Architecture
OPERATOR WORK STATION :DCS OPERATOR WORK STATION Alarm monitoring
Mimic /graphic display
Trend display
Operator guidance display
System & diagnostic display
Control
Bar chart
Sequence display
Fault analysis display
DISPLAY-mimic :DCS DISPLAY-mimic
DISPLAY-mimic :DCS DISPLAY-mimic
TRENDING :DCS TRENDING
LOGS / SUMMARIES / REPORTS :DCS LOGS / SUMMARIES / REPORTS EVENT ACTIVATED LOGS -.alarm log ,trip analysis log, start up log
TIME ACTIVATED LOGS-shift log, daily log
OPERATOR DEMAND LOGS- summary log, performance log, maintenance log
SEQUENCE OF EVENTS LOG
REPORTS :DCS REPORTS
AUTO CONTROL LOOP :DCS AUTO CONTROL LOOP Coordinated control
Total air control
Super/reheater temperature control
Mill out temperature control
Hot well/heater /deaerator level control
Drum level control
Furnace draft control
INTERLOCK & PROTECTION :DCS INTERLOCK & PROTECTION Interlock & protection are used for safe startup /operation /shutdown /trip /of any equipment or auxiliaries, e.g.
CW pump, ID Fan , FD fan, BFP, CEP, Mill ,PA FAN
Heater
Valve & drains
BOILER CONTROLS :DCS BOILER CONTROLS Burner management system
Secondary air damper control
Aux pressure desuper heating system
Soot blower control
Hp by pass
TURBINE CONTROL SYSTEM :DCS TURBINE CONTROL SYSTEM Turbine governing system
Turbine protection
Automatic turbine run up system
Turbine stress controller
Lp bypass
Sequence controls for turbine driven BFP
Generator aux monitoring
PERFORMANCE CALCULATION :DCS PERFORMANCE CALCULATION Boiler efficiency
Turbine
HP/IP/LP turbine
Feed heaters
Deaerator
Condenser
Air preheater
Unit heat rate
TYPICAL DCS OF 500 MW UNIT :DCS TYPICAL DCS OF 500 MW UNIT No of inputs 13750
No of outputs 7250
Operator Work Station 8
Large Video Screen 5
THANKS :DCS THANKS