CAT Titan 250 - Manual (Page 41)

Turbomachinery Package Specification Titan 250 Generator Set
10 Generator Control and Monitoring
10.1 General Description
For generator control and monitoring, the Turbotronic 4 control system incorporates a
Rockwell Automation/Allen-Bradley combination generator control module (CGCM). The
CGCM provides generator control, protection, and monitoring. Three excitation control
modes are available:
• Automatic voltage regulation (AVR) - A constant generator output voltage is
maintained
• Power factor (PF) control - A constant power factor is maintained when operating
in parallel with a large power source
• Reactive power control - A constant reactive load is maintained when operating
in parallel with a large power source
The following excitation control features are available:
• Under frequency limiting
• Over and under excitation limiting
• Reactive droop compensation
• Cross-current compensation
• Line-drop compensation
Protection features for the driver and driven equipment include:
• Field current limit
• Generator overcurrent
• Generator overvoltage
• Generator undervoltage
• Loss of excitation current
• Loss of operating power
• Loss of sensing
• Over excitation voltage
• Overfrequency
• Underfrequency
• Phase rotation error
• Reverse power
• Reverse volt amp reactive (VAR)
• Exciter (rotating) diode monitor
The protection features provided typically do not meet the requirements of power utility
companies for the general protection of power distribution systems. This can only be
done through the use of appropriately certified protective relay components with settings
approved by qualified personnel based on a comprehensive analysis of the complete
system.
© 2008 Solar Turbines Incorporated. All rights reserved. TPS250GS/908 - Preliminary
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