GT-MKVI021 INTRODUCTION TO THE GAS TURBINE AND MARK VI.
Course description.
This course covers both the gas turbine and the Mark VI.
The first part of the program studies the main components of the gas turbine, their functions, and
the
correct operation of the unit under the control of a Mark VI.
The second part is dedicated to the Mark VI hardware, its I/O and the control program software.
During the first week, the student learns the turbine components, the procedures for the correct
starting,
loading and shutdown of the unit. It becomes familiar with the protection systems, the recognizing
of
symptoms for abnormal conditions, the diagnosis of combustion problems and the understanding
of the
temperature and pressure protection curves.
During the second week, the program treats the Mark VI hardware and software components.
The
student learns to analyze and diagnose panel internal failures, the assignment and connection of
I/O
signals, addition of new I/O and internal signals, the tracing of alarms from the screen to the point
of
origin and acquires the knowledge to make basic modifications in the control sequence and in the
HMI
operator screens.
Each class includes hands-on practices of laboratory.
The program is tailored to the number of students, the available time and customer requirements.
Duration: two weeks.
PROGRAM.
Day 1.
Gas turbine fundamentals.
Purpose of the gas turbine.
Turbine components.
Representative potency for a 7,000 HP turbine.
Impulsion nozzles.
Reaction buckets.
Potency Vs. inlet temperature.
Compressor stages.
Compressor rotor.
Variable Inlet Guide Vanes.
Compressor bleeding valves.
Day 2.
Turbine components.
Liquid fuel control valves.
Gas fuel control valves.
Anular combustion system.
Combustion liner.
Transition pieces.
Turbine rotor.
Turbine stages.
First stage cooling passages.
Diaphragm and 2nd. stage buckets.
Bearing lube oil distribution.
Day 3.
Thrust bearing.
Tilting pad bearing.
Flow divider.
Injectors fuel line.
Analysis of curves for speed, pressure and temperature of start, load and shutdown
stages.
Lube oil system.
Control Oil system.
Gas turbine auxiliary systems.
Dry Low Nox systems versions DLN-1, 2 and 2.6.
Day 4.
Introduction to the HMI.
ToolBox application.
Organization of turbine control files.
The Control Sequence. Basic elements and larger blocks.
Adding new control rungs.
Creation and modification of alarms and constants.
Tracing alarms from the screen to their correspondent field device.
Compilation and downloading to the panel.
Day 5.
Turbine trip sequence.
Exhaust RTD's. Assignation and selection.
Exhaust temperature calculation.
Combustion temperature algorithms.
Combustion problem diagnosis.
Vibration monitoring.
Servo/regulators.
Valves and IGV's calibration.
Day 6.
Gas turbine main control blocks. (1st. Part).
L14TV1 - SPEED LOGIC SENSING
FSRSUV1 - STARTUP FSR
FSRSDV1 - SHUTDOWN FSR
FSRMANV2 - MANUAL FUEL STROKE REFERENCE
SRNV2 - SPEED CONTROL FSR
FSRACCV1 - ACCELERATION CONTROL FUEL STROKE REF
FSRTV3 - TEMPERATURE CONTROL FUEL STROKE REF.
FSRV2 - FUEL STROKE REFERENCE
FSR1V1 - FUEL SPLITTER.
Day 7.
Gas turbine main control blocks. (2nd. Part).)
TTXMV4 - EXHAUST TEMPERATURE FEEDBACK AND PROTECTION
TTRXV5 - TEMP CONTROL REFERENCE
TTRXGVV5 - INLET GUIDE VANE TEMP CONTROL
CSRGVV2 - MODULATED INLET GUIDE VANE CONTROL
FQROUTV1 - LIQUID FUEL FLOW COMMAND.
FPRGV2 - GAS STOP/SPEED RATIO VALVE OUTPUT
L3GFLTV1 - GAS FUEL CONTROL FAULT
TTXSPV5 - COMBUSTION SPREAD MONITOR
L39VV5 - VIBRATION LEVEL DETECTION
L30WSAV1 – WHEELSPACE temeprature MONITOR
L60SYNC1 - GENERATOR SYNCH/MATCHING.
Day 8.
Main components of the Mark VI.
Processor boards. Analysis of functions and internal circuits.
<PDM> core. Power distribution.
Power supplies. Diagnostic of failures.
Signal classes. Correct connection and internal processing.
Signals configuration.
Different types of signal units.
Day 9.
Communication between the MKVI and other plant systems.
Internal communication between cores.
Loop tests of protection circuits.
Function and correct set of jumpers on each board.
Protection core <P> y turbine trip relays.
Synchronization. Verifications on hardware and software.
Common failures when synchronizing.
Day 10.
Password and different work levels on the <HMI>.
CimEdit. Types of objects on control screens.
Operator screen modifications.
Graphic creation and data collection.
Trip history set up.
ToolBox diagnostic tools.
General overview and delivery of diplomas.
