Allen-Bradley 1407-CGCM-DLR, User Manual, Page: 51 / 268

Rockwell Automation Publication 1407-UM002B-EN-P - February 2019 51
CGCM-DLR Unit Operation Chapter 3
Power Factor Regulation Mode (PF)
In PF mode, the CGCM-DLR unit controls field excitation current output to
maintain the commanded power factor setpoint. The CGCM-DLR unit uses the
measured generator voltages and currents to calculate power factor. The PF
feedback loop includes adjustable proportional and integral gains. To activate PF
mode:
•
The metering CTs and VTs must be properly connected and configured.
•
The PF mode gains must be set.
•
The desired power factor setpoint must be written to the PFSetpt tag.
•
Excitation enabled (tag SoftwareExcEn = 1).
•
Remote Excitation Enable On (discrete input).
•
The CGCM-DLR unit must be in AVR mode
(tag
AVR_FCR_Select
= 0).
•
Droop must be enabled (
V_DroopEn
tag = 1).
•
Droop must be selected (
Droop_CCC_Select
tag = 0).
•
Automatic reactive power control must be enabled (tag
PF_VAR_En
= 1).
•
Power factor control must be selected (tag
PF_VAR_Select
= 0).
Reactive Power Regulation Mode (VAR)
In VAR mode, the CGCM-DLR unit controls field excitation current output to
maintain the commanded reactive power setpoint. The CGCM-DLR unit uses
the measured generator voltages and currents to calculate reactive power. The
VAR feedback loop includes adjustable proportional and integral gains. To
activate VAR mode:
•
The metering CTs and VTs must be properly connected and configured.
•
The VAR mode gains must be set.
•
The desired reactive power setpoint must be written to the
VARSetpt
tag.
•
Excitation enabled (tag
SoftwareExcEn
= 1).
•
Remote Excitation Enable On (discrete input).
•
The CGCM-DLR unit must be in AVR mode
(tag
AVR_FCR_Select = 0).
•
Droop must be enabled ( V_DroopEn tag = 1).
•
Droop must be selected ( Droop_CCC_Select tag = 0).
•
Automatic reactive power control must be enabled (tag PF_VAR_En = 1).
•
VAR control must be selected (tag PF_VAR_Select = 1).