Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 94)

94 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 4 CGCM Unit Configuration
• Power Factor Traverse Rate - Sets tag PF_Traverse_Rate in the
Configuration table. This parameter determines the time measured in
seconds for the PF setpoint to move from 0.50 lagging to 0.50 leading or
vice versa. It determines how fast the regulator changes the power factor
setpoint from the tracking value to the operating setpoint when the
Regulator Operating mode changes to PF.
• VAR Control Traverse Rate - Sets tag VAR_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 KVA. It
determines how fast the regulator changes the VAR setpoint from the
tracking value to the operating setpoint when the Regulator Operating
mode changes to VAR.
• Manual Control (FCR) Traverse Rate - Sets tag FCR_Traverse_Rate in
the Configuration table. This parameter determines the time measured in
seconds for the setpoint to move from zero to the rated exciter current. It
determines how fast the regulator changes the field current setpoint from
the tracking value to the operating setpoint when the Regulator Operating
mode changes to FCR.
The following diagram shows the function of internal tracking and traverse rates
on a switch from VAR to PF operating modes.
Figure 40 - Internal Tracking and Traverse Rates
VAR Mode PF Mode
Excitation Current
VARs
Power Factor
Generator Voltage
PF Mode Setpoint
PF Mode Internal
Tracking Setpoint =
Measured PF
PF Mode Traverse Rate
Determines Transition to New
Mode's Operating Point
VAR Internal
Tracking Setpoint
FCR Internal
Tracking Setpoint
PF is New
Process Variable
VARs are Old Process
Variable