Slide 1

Report
CONTROLS & INSTRUMENTATION
FOR
660 MW SUPERCRITICAL UNIT @ Tiroda
1/16/2012
1
Road Map

Instrumentation at Tiroda Power Plant

Feedwater Control

Automation technologies

IT Integration
INSTRUMENTATION @ TIRODA
Application of Technology
Technology
Application
SMART / HART
Transmitter / Positioners
IR sensors
Flame Scanner & CHP
Conveyor fire detection
Piezoelectric sensors
Compressor system
3D Imaging level meas
Bunker level Meas
CCTV
Flame Monitoring
Acoustics Sensor
BTLDS
Wireless Transmitter
Remote flow meas
MODBUS/OPC
Third Party Interface
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
Furnace TV :
-
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.
FEEDWATER CONTROL
The key differentiator between subcritical and supercritical…
Feed Water Control
Natural circulation boiler
•
m
Once-through boiler
Deg. of Super Heat
Steam flow
T
Ts-Tsat
T
P
T
Level
Feedwater
control
Eco
Eva
Eco
BCP
Feedwater
control
FW
008 406p
WW
FW
Feed Water Control
SUBCRITICAL (DRUM)
SUPERCRITICAL (ONCE-THRU)
Low Load
• Single Element Level Control
Wet Mode
• BCP in recirculation mode for Load < 30 %
Higher Load
• Three Element Level Control
• 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
To Superheater
To Superheater
Separator Tank – A
Separator Tank - B
From
Water Wall
O/L
From
Water Wall
O/L
Levelling Vessel
To Condensor
To SH Spray
To BCP
Feed Water Control
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

Levelling Vessel Level Control byFrom Separator-A
From Separator-B
Levelling Vessel
Drain CVs to
Condensor
CV to 1st stage DSH water
BCP
BCP Discharge
CV to Eco. I/L
Drain CVs to
OAC/Waste
Feed Water Control
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
control
Separator O/L Temperature Control
Separator O/L
Press
Separator O/L
Temperature - Ts
PV
Deg of SH + Tsat
X
0
12
19.5
Y
120
340
377
.
.
.
.
SP
F1(x)
PID
Feedwater Flow
PV
Desired FW Flow
Fuel Flow
Temp Correction
block
F2(x)
X
0
103
236
320
Y
0
663
1638
2285
.
.
.
.
SP
PID
TDBFP Master
Command
AUTOMATION TECHNOLOGIES
AUTOMATION TECHNOLOGIES
Conventional
Latest
• PLC
• Advanced PLCs
• DCS with local IO & limited
processing capabilities
• DCS with remote IO
• Speed limited to backplane
communication
• TCP/IP communication upto
1Gbps
• Server Based architecture
• Mesh Topology for reliable
network
• Statement based Logic
configuration
Capability **
• Graphical Drag and Drop
facility for logic configuration
** Used for Metal Temperature Thermocouples,
CWPH, CT, FOPH, Compressor system
MESH NETWORK
DCS DETAILS
Foxboro 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
BOILER MFT
• TRICONEX
• TRIPLE MODULAR REDUNDANT SYSTEM
• HARD WIRED BACKUP RELAY PANEL
• TUV SIL3 CERTIFIED
• PROGRAMMING SOFTWARE :
(Tristation 1131 Standard Programming)
Class (IEC61131-3 )
Benefits of Latest Technology
1. Availability of online dataa) For Operator
b) For Management at Tiroda
c) Corporate Office
d) Other OEMs for analysis purpose of their equipments
2. 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.
IT INTEGRATION
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
Thank You…!!

similar documents