Power plant control

1. CLOSE LOOP CONTROL SYSTEM
AND
STATION C&I DDCMIS

2. DDCMIS SYSTEM

Process I/O Level
Process Control Level
Management Level
DRIVES
MEASU
RING
INSTRU
MENTS
OTHER
PROCESS

3. INSRUMENTATION IN POWER PLANT
• Temperature - T/C & RTD
• Pressure
• Level - DP / Displacement / Hydra Step Drum Level Indicator
• Flow - DP / Annubar / Mag-flow
• Turbine Supervisory - Vibration/ Expansion/ Axial Shift/ Eccentricity
• Steam & Water Analysers - Conductivity/ pH/ DO2/ Silica
• Gas Analysers - O2/ CO2/ CO (in Flue Gas)
Pollution Monitor
H2 Purity (in Generator)

4. INSTRUMENTS TO DDCMIS
Control Network
(INFI-NET)
Harmony
Consoles
H-Net
Bridge
Controller
Bridge
Controller PBAs
Harmony
IOR
Gateway S800 I/O
Cluster
Modem
Optical
ModulebusModulebus
Repeater
M1
M2
X1
X2
Chan A
Chan B
B
B
A
A
M1
M2
BA
S800 I/O
Cluster
Modem
Harmony
Engineering
Tools

5. DDCMIS OPTIONS

6. PLANT TO MANAGEMENT
CONNECTIVITY

7. DDCMIS OPTIONS

8. CONTROL SYSTEM
Introduction
System – An interconnection of elements and devices for a desired purpose.
Control System – An interconnection of components forming a system configuration
that will provide a desired response.
Process – The device, plant, or system
under control. The input and output
relationship represents the cause-and-
effect relationship of the process.

9. Introduction
Multivariable Control System
Open-Loop Control Systems
utilize a controller or control
actuator to obtain the desired
response.
Closed-Loop Control Systems
utilizes feedback to compare
the actual output to the
desired output response.

10. EXAMPLE:- PROCESS CONTROL
Water-level float regulator

11. Examples of Modern Control Systems

12. Examples of Modern Control Systems

97. POWER PLANT PROCESS CONTROL
COORINATED MASTER CONTROL
AIR AND FUEL FLOW CONTROL
DRUM LEVEL/FEED WATER CONTROL
SH/RH TEMPERATURE CONTROL
FURNACE DRAFT CONTROL
HEATER LEVEL CONTROL
MILL AIR AND TEMPERATURE CONTROL
PA HEADER PRESSURE CONTROL

99. THANK YOU