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• Proportional Gain Kp - Sets the proportional gain, which determines the
characteristic of the dynamic response to changes in generator voltage. If
the transient response has too much overshoot, decrease Kp. If the
transient response is too slow, with little or no overshoot, then increase Kp.
The tag AVR_FCR_Kp in the Unscheduled Write table stores this
parameter.
• Integral Gain Ki – Sets the integral gain. If the time to reach steady state is
too long, increase Ki. The tag AVR_FCR_Ki in the Unscheduled Write
table stores this parameter.
• Derivative Gain Kd – Sets the derivative gain. To improve the transient
response to a step change, increase Kd. If there is too much jitter in the
steady-state voltage, decrease Kd. The tag AVR_FCR_Kd in the
Unscheduled Write table stores this parameter.
• Time Constant Td - The filtering time constant, Td, is used to remove the
noise effect on the numerical differentiation. The tag AVR_FCR_Td in
the Unscheduled Write table stores this parameter, expressed in seconds.
• FCR Overall Gain Kg - Sets the overall gain of the voltage regulator in
FCR mode. It determines the characteristic of the dynamic response to a
change in the CGCM-DLR unit output current. The tag FCR_Kg in the
Unscheduled Write table stores this parameter.
• AVR Overall Gain Kg – Sets the overall gain of the voltage regulator in
AVR mode. It determines the characteristic of the dynamic response to a
change in the voltage of the generator. The tag AVR_Kg in the
Unscheduled Write table stores this parameter.
• Voltage Matching Gain – This parameter is not used. Set to zero. The tag
V_Match_Gain in the Unscheduled Write table stores this parameter.
Power Factor Control
The Power Factor Control gains determine the response of the power factor
control loop for the voltage regulation function when in PF mode. These settings
can be adjusted during system startup.
See
Chapter 5
for more information on tuning the power factor control gains.
• Integral Gain Ki - Sets the integral gain. Generally if the time to reach
steady state is too long, increase Ki. The tag PF_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 power factor. 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 PF_Kg in
the Unscheduled Write table stores this parameter.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
CGCM-DLR Unit Configuration
Chapter 4
101
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