Rockwell Automation 1407-CGCM Combination Generator Control Module User Manual
Page 93
Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
93
CGCM Unit Configuration Chapter 4
Increasing the internal tracking rate makes the tracking function less responsive to
changes in the regulator output by reducing the slope of the tracking function.
Increasing the tracking delay offsets the tracking response to the right in the
figure. In the example above, if the internal tracking delay were reduced, it is likely
that the FCR mode setpoint has started at full regulator output, and recovery to
the desired operation has been delayed.
Redundant Tracking
• Redundant Tracking Rate - This setting adjusts the rate at which the
tracking function of the redundant CGCM unit matches its regulator
operating point to that of the active CGCM unit. This sets the value of the
RedndtTrackRate
tag in the Configuration table, expressed in seconds per
full-scale excursion of the regulator output from zero to the rated
generator field current.
• Redundant Tracking Delay - This setting adjusts the delay in the
redundant tracking function. This sets the value of the
RedndtTrackDelay
tag in the Configuration table, expressed in seconds.
Its purpose is to reduce the likelihood that the short-term response of the
active CGCM unit’s Regulating mode to an upset will be transferred to the
back-up CGCM unit when it becomes primary.
The redundant tracking function performs in a similar fashion to the internal
tracking example above. Increasing the redundant tracking rate makes the
tracking function less responsive to changes in the regulator output by reducing
the slope of the tracking function. Increasing the tracking delay offsets the
tracking response to the right in the figure.
Traverse Rates
These parameters adjust how fast the regulator changes its operating point from
one setpoint, the tracking value, to another when changing regulator operating
modes. In general, the lower the rate, the faster the regulator operating point
changes. A value of 200 puts the regulator in Hold mode and prevents the field
current from changing when the Regulator Operating mode is changed.
Please refer to
for more information.
• AVR Control Traverse Rate – Sets tag AVR_Traverse_Rate in the
Configuration table. This parameter determines the time measured in
seconds for the setpoint to move from zero to the rated generator voltage.
It determines how fast the regulator changes the voltage setpoint from the
tracking value to the operating setpoint when the Regulator Operating
mode changes to AVR.
TIP
Redundant tracking is enabled whenever two CGCM units are configured
in a Redundant mode and both are operational. Redundant tracking
parameters have no effect on a CGCM that is not part of a redundant
pair.