Gain Tab

Use this tab to enter the PID and gain values.

Parameters

Power Factor Control

Integral Gain Ki

This value allows you to adjust the integral gain of the power factor controller and determines the characteristic of the dynamic response to a change in the power factor setting. Valid values range from 0.0 (default) to 1000.0.

Overall Gain Kg

This value allows you to adjust the coarse loop gain, which converts per unit gains to system gains, and overall gain of the power factor controller. This value also determines the characteristic of the dynamic response to a change in the power factor of the generator. Valid values range from 0.0 (default) to 1000.0.

VAR Control

Integral Gain Ki

This value allows you to adjust the integral gain of the Var controller, and determines the characteristic of the dynamic response to a change in the Var setting. Valid values range from 0.0 (default) to 1000.0.

Overall Gain Kg

This value allows you to adjust the coarse loop, which converts per unit gains to system gains, gain, and overall gain of the power factor controller. This value also determines the characteristic of the dynamic response to a change in the vars of the generator. Valid values range from 0.0 (default) to 1000.0.

Over-Excitation Limiting

Integral Gain Ki

This value allows you to adjust the integral of the overexcitation limiter, and determines the characteristic of the dynamic response to an overexcitation event. Valid values range from 0.0 (default) to 1000.0.

Overall Gain Kg

This value allows you to adjust the proportional gain of the overexcitation limiter, and determines the response of the limiter to an overexcitation event. Valid values range from 0.0 (default) to 1000.0.

Under-Excitation Limiting

Integral Gain Ki

This value allows you to adjust the integral of the underexcitation limiter, and determines the characteristic of the dynamic response to an underexcitation event. Valid values range from 0.0 (default) to 1000.0.

Overall Gain Kg

This value allows you to adjust the proportional gain of the underexcitation limiter, and determines the response of the limiter to an underexcitation event. Increasing this value increases the speed of the response of the limiter. Valid values range from 0.0 (default) to 1000.0.

AVR/FCR Control

Proportional Gain Kp

This value allows you to adjust the proportional gain of the AVR, and determines the characteristic of the dynamic response to changes in generator voltage. Generally, if the transient response has too much overshoot, you should reduce the Kp value. If the transient response is too slow, with little or no overshoot, you should increase Kp. Valid values range from 0.0 (default) to 1000.0.

Integral Gain Ki

If the time to reach steady state is too long, you should increase the Ki value. Valid values range from 0.0 (default) to 1000.0.

Derivative Gain Kd

If the transient response has too much ringing, you should increase the Kd value. Valid values range from 0.0 (default) to 1000.0.

Time Constant Td

This value, the filtering time constant, is used to remove the noise effect on the numerical differentiation. Valid values range from 0.0 (default) to 1000.0.

FCR Overall Gain Kg

This value allows you to adjust the coarse loop gain and overall gain of the FCR operating mode, and determines the characteristic of the dynamic response to a change in the voltage of the generator. Valid values range from 0.0 (default) to 1000.0.

AVR Overall Gain Kg

This value allows you to adjust coarse loop gain and overall gain of the AVR operating mode, and determines the characteristic of the dynamic response to a change in the voltage of the generator. Valid values range from 0.0 (default) to 1000.0.

Voltage Matching Gain

If the time to match the generator voltage to bus voltage is too long, you should increase this value. Adjusting this value may also have an impact on the voltage matching accuracy, and may change the rate at which bus voltage is reached. Valid values range from 0.0 (default) to 1000.0.

AVR/FCR Auxiliary Gain

This value allows you to adjust the overall gain of the auxiliary input's control on the AVR/FCR operating mode. The units for this value are percent of nominal per volt. Valid values range from -99.0 to 99.0; the default value is 0.0. Setting this value to 1.0 results in the controlled parameter being changed by one percent of the nominal value for each volt applied to the auxiliary input.

PF/VAR Auxiliary Gain

This value allows you to adjust the overall gain of the auxiliary input's control on the Var/PF operating modes. The units for the var controller are percent of nominal per volt. Valid values range from -99.0 to 99.0; the default value is 0.0. Setting this value to 1.0 results in the controlled parameter being changed by one percent of the nominal value for each volt applied to the auxiliary input. Setting this value to 5.0 results in the regulated PF being changed by 0.05 for each volt applied to the auxiliary input.

Cross Current Gain

This value allows you to adjust the gain of the cross current input. The actual value measured by the cross current input is multiplied by the value you enter here. This value can be used to improve the var sharing between machines connected in cross current. Valid values range from -30.0 to 30.0; the default value is 1.0.

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