PRODUCT BULLETIN: 04005
ROLLS-ROYCE AVON® GAS TURBINE GENERATOR DRIVE
APPLICATION CONTROL PACKAGE
MAY 2012
THERMOCOUPLES
NHP
1
NHP
2
NHP
3 GENERATOR
NST STARTER
PCD
THERMOCOUPLES AUTO
F SYNC WT
E (BP EGT)
IGV RAM E
D
B
HYDRAULIC A
POWER C
UNIT SERVO K
VALVE
SERVO
CONTROLLER
I/E
BYPASS
VALVE
GAS LIQUID
FUEL FUEL
SPEED STOP GAS FUEL STOP
FUEL
RATIO VALVE CONTROL VALVE
PUMP
VALVE FUEL VALVE
FLOW
DIVIDER
4-20 mA 4-20 mA
FUEL PRESSURE INPUT LIQUID FUEL FLOW INPUT
4-20 mA 4-20 mA
SRV OUTPUT LCV VALVE OUTPUT
4-20 mA
GCV OUTPUT BP EGT THERMOCOUPLE
4-20 mA INPUTS
INLET GUIDE VANE OUTPUT
4-20 mA RAISE
PCD INPUT
FREQUENCY SYNCHRONIZING INPUT
NST INPUT LOWER
FREQUENCY
4-20 mA
WATTS INPUT
FREQUENCY SPEED INPUTS
2oo3 VOTE EGT THERMOCOUPLE mV
FREQUENCY INPUTS
APPLICATION CONTROL PACKAGE OPTIONAL
MMI
DCS/SCADA TO PLANT INFORMATION SYSTEM COMM PORT
PLC INTEGRATED CONTROL SYSTEM
Simplified schematic showing a Petrotech Rolls-Royce Avon® gas turbine generator drive application control
package integrated into an advanced PLC-based control system. Shown with dual fuel system.
PRODUCT BULLETIN 04005 - ROLLS-ROYCE AVON® GAS TURBINE GENERATOR DRIVE APPLICATION CONTROL PACKAGE - Page 2
APPLICATION SCOPE OF SUPPLY
The Rolls-Royce Avon gas turbine generator set application control
®
The application control package for the Rolls Royce Avon® gas
package replaces older mechanical/hydraulic/electronic/pneumatic turbine generator drive system, includes:
gas turbine fuel regulators with a modern, reliable application
Analog inputs, 4-20 mA:
control package which runs on an open architecture advanced
PLC-based system. The control package for the gas turbine • Watts (load control).
provides on-line dual fuel control, speed ratio control, and inlet • Compressor discharge pressure (PCD).
guide vane control based on temperature. • Fuel interstage pressure.
Analog inputs, frequency:
ADVANTAGES
• Three (3) redundant NHP.
• Hardware independent system: • One (1) starter speed.
Application control package’s portability allows customer choice of
PLC platform, reducing need for additional spare parts and training Analog inputs, mV:
expenses. Available PLCs include General Electric 90-70 and 90-30, • EGT (up to 18 thermocouples).
Siemens/TI, Modicon Quantum, and Allen-Bradley. Analog outputs, 4-20 mA:
• Fault tolerant: • Speed ratio valve position setpoint.
Control package is available on fault tolerant controllers for critical • Fuel control valve position setpoint.
control applications. • Inlet guide vane position setpoint (if applicable).
• Simplified interface to DCS or SCADA: Operating states:
Communication tasks are handled with a separate, dedicated module • Firing.
in the PLC, increasing data rate and simplifying network installation.
• Warm-up.
• Improved fuel regulation: • Accelerate.
Fast loop sampling rate, combined with modern digital control
• Load.
techniques, improves steady-state setpoint control, and reduces
overshoot during transients, allowing full load rejection without • Upset.
driving the unit into overspeed. Status, alarms, and shutdowns:
• Improved start-up reliability: • Fault .
Special “lean lightoff” procedure ignites all burners with essentially • NHP overspeed alarm.
100% reliability, and with greatly reduced thermal stress. • NHP underspeed alarm.
• Improved exhaust temperature monitoring and control: • NHP overspeed shutdown.
Advanced statistical algorithms detect turbine hot/cold spots and • Redundant NHP overspeed shutdown.
automatically reject failed thermocouples. • rNHP alarm.
• Fail-safe features: • High blade path EGT alarm.
Redundant overspeeds; open/short monitoring of mA and • High blade path EGT shutdown.
thermocouples; readback monitoring of outputs, and special self- • Low blade path EGT shutdown.
check features improve safety.
• High EGT alarm.
• Non-proprietary interfaces: • High EGT shutdown.
Simple 4-20 mA, RTD, thermocouple, and dry contact I/O allow
• Low EGT shutdown.
simple interface to existing sequence/protection logic unit, making
low-cost partial upgrades practical, and system troubleshooting • Rejected thermocouple.
simple. • Too few thermocouples shutdown.
• Improved operator information with optional MMI: • rT alarm.
Optional Man-Machine Interface MS Windows-based graphic • rT shutdown.
operator interface displays system status, trending and data logging, • Thermocouple spread alarm.
which can be used as part of a preventive maintenance program. • Thermocouple spread shutdown.
• Turbine maximum limit.
• Turbine minimum limit.
• NHP speed #1.
• NHP speed #2.
• NHP speed #3.
• NHP speed #4.
• NHP speed #5.
• EGT switch #1.
• Blade path EGT switch #1.
• Bolt test.
• Manual.
PRODUCT BULLETIN 04005 - ROLLS-ROYCE AVON® GAS TURBINE GENERATOR DRIVE APPLICATION CONTROL PACKAGE - Page 3
SCOPE OF SUPPLY - Continued OPTIONS FOR COMPLETE CONTROL SYSTEM
• Starter overspeed. UPGRADE
• Starter zero speed. • Gas turbine sequencing and protection discrete logic.
• High firing fuel pressure shutdown. • Generator sequencing and protection discrete logic.
• PCD bias active. • Communication interface to DCS or SCADA.
• Flow following error. • PLC hardware.
• Transmitter failure alarms. • Man machine interface unit with WonderWare InTouch® licensed
• Transmitter failure shutdowns. software package.
• Output failure shutdowns. • Complete custom engineered control panel, factory tested and ready
to install.
• Control mode.
• Fuel valve system upgrade.
Controllers/special features: • Inlet guide vanes actuator system upgrade or retrofit.
• Start-up controller for fuel valve.
• Thermocouple upgrade.
• NHP controller for fuel valve.
• Flame sensor upgrade.
• NHP acceleration controller for fuel valve.
• Vibration system upgrade.
• EGT controller for fuel valve.
• Installation and commissioning.
• EGT rate of rise controller for fuel valve.
• Training.
• Blade path EGT controller.
• Blade path EGT/PCD schedule.
• EGT controller for inlet guide vanes (if applicable).
• Combustion monitoring system.
Ramps:
• Firing (lean lightoff) ramp.
• Start-up ramp.
• Loading ramp.
• Cooldown ramp.
Does not include:
• PLC hardware.
• Gas turbine sequencing and protection discrete logic.
• Generator sequencing and protection discrete logic.
• Synchronizing and regulation equipment.
• End elements.
Petrotech, Inc. Phone: (504) 620-6600
151 Brookhollow Esplanade Fax: (504) 620-6601
New Orleans, Louisiana 70123 Email: info@petrotechinc.com
USA Website: www.petrotechinc.com
This document is a Petrotech, Inc. copyrighted intellectual property and may be changed at any time without notice.
