Turbomachinery Package Specification

Titan 250 Generator Set

 

 

9.3.4Vibration Monitoring System

The system uses 1701 FieldMonitors and associated sensing devices from Bently Nevada. The capacity of each monitor is eight vibration channels plus a keyphasor input. The system is configurable from the control processor. It detects preprogrammed alarm and shutdown levels. See the specification tables for a list of monitored channels.

9.3.5Backup Shutdown System

The backup shutdown system shuts the package down in a safe and orderly manner without damage to the equipment in the event of a failure in the primary system. The control processor is monitored by both an internal watchdog circuit and by an external watchdog device. If either circuit detects a processor failure, the backup system takes control. It opens the generator circuit breaker, closes the fuel valves, and initiates a post lube cycle to protect the turbine bearings. Once a backup shutdown is initiated, operation can only be restored manually from the control panel after all faults have been cleared. The emergency stop push-button switches are wired to both the primary and backup systems.

9.3.6Fire and Gas System

Enclosed packages require fire and gas control protection. The Eagle Quantum Premier system from Det-Tronics detects gas and/or fire inside the enclosure based on inputs from gas, thermal, and optical flame detectors. If fire is detected, the system releases an extinguishing agent into the enclosure. If a fire or an unacceptable gas level is detected, the system instructs the Turbotronic control processor to initiate a package shutdown. The system is also wired directly to the backup shutdown system. See Enclosure Section 11 for a more complete description.

9.3.7Combination Generator Control Module

The combination generator control module (CGCM) provides voltage regulation, automatic breaker synchronization, excitation control, power metering, load sharing, and protective relay functions. For a more detailed description of the CGCM capabilities, refer to Section 10, Generator Control and Monitoring.

9.3.8Control System Power Supplies

The control system operates on 24 VDC power. The standard battery charge system provides 120 VDC power to the control system. The control system includes a 120 to 24 volt DC-to-DC converter to supply 24 VDC power to the control system. For a more detailed description of the battery charger system, refer to Section 14, Accessory Equipment.

9.4System Monitoring and Control Functions

The control system provides sequencing control during gas turbine startup, steady state operation, and shutdown. Protective functions are provided during all stages of operation.

9.4.1Starting and Loading

The Start command initiates the sequence. Prior to rotation, the lube oil pump undergoes a test cycle, the enclosure fans (if applicable) are started, and the fuel valves undergo a test cycle with fuel pressure verification.

The starter then rotates the gas turbine and the compressor develops airflow to purge any accumulated gas in the gas turbine, air inlet, and exhaust duct. The purge cycle is tailored to the exhaust duct volume.

When the engine has reached the required speed and temperature, a small amount of fuel is introduced into the combustor from the gas torch and ignited by the ignitor plug.

© 2008 Solar Turbines Incorporated. All rights reserved.

TPS250GS/908 - Preliminary

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