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Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Chapter 4
CGCM-DLR Unit Configuration
VAR Control
The VAR Control gains determine the response of the VAR control loop for the
voltage regulation function when in VAR mode. These settings can be adjusted
during system startup.
See
for more information on tuning the VAR control gains.
•
Integral Gain Ki - Sets the integral gain. Generally if the time to reach
steady state is too long, increase Ki. The tag
VAR_Ki
in the Unscheduled
Write table stores this parameter.
•
Overall Gain Kg - Sets the overall gain, which determines the characteristic
of the dynamic response to changes in VARs. If the transient response has
too much overshoot, decrease Kg. If the transient response is too slow, with
little or no overshoot, then increase Kg. The tag
VAR_Kg
in the
Unscheduled Write table stores this parameter.
Over-excitation Limiting
The OEL gains determine the response of the OEL control loop for the voltage
regulation function when OEL is active. These settings can be adjusted during
system startup.
See
for more information on tuning the OEL control gains.
•
Integral Gain Ki - Sets the integral gain. If the time to reach steady state is
too long, increase Ki. The tag
OEL_Ki
in the Unscheduled Write table
stores this parameter.
•
Overall Gain Kg - Sets the overall gain, which determines the characteristic
of the dynamic response when OEL is active. If the transient response has
too much overshoot, decrease Kg. If the transient response is too slow, with
little or no overshoot, then increase Kg. The tag
OEL_Kg
in the
Unscheduled Write table stores this parameter.
Under-excitation Limiting
The UEL gains determine the response of the UEL control loop for the voltage
regulation function when UEL is active. These settings can be adjusted during
system startup.
See
for more information on tuning the UEL control gains.
•
Integral Gain Ki - Sets the integral gain. If the time to reach steady state is
too long, increase Ki. The tag
UEL_Ki
in the Unscheduled Write table
stores this parameter.
•
Overall Gain Kg - Sets the overall gain, which determines the characteristic
of the dynamic response when UEL is active. If the transient response has
too much overshoot, decrease Kg. If the transient response is too slow, with
little or no overshoot, then increase Kg. The tag
UEL_Kg
in the
Unscheduled Write table stores this parameter.