Basler BE2000E, Instruction Manual, Page: 61 / 82

9287500995 Rev B 53
Integral means that the BE2000E output is proportional to the amount of time that a change is observed.
Integral action eliminates offset. Derivative means that the BE2000E output is proportional to the required
rate of excitation change. Derivative action avoids excitation overshoot.
BESTCOMS-BE2000E automatically calculates PID values after the user selects the generator
frequency, generator time constant (T'do), and exciter time constant (Texc). With BESTCOMS-BE2000E
software, the user may generate new PID numbers, add to a PID list file, and update the AVR gain
settings.
The PID window (Figure 36) is accessed by clicking the PID button. The PID button can be clicked only
when the Stability Range setting of the Control Gain screen is set at a value of 21. (A setting of 21
enables the entry of custom stability settings through the PID window.) Then, when a field of the Control
Gain screen is changed or selected, the PID button changes from gray to yellow and the button can be
clicked to view the PID window. After the PID numbers are modified, calculated, and updated, the PID
window is closed by clicking the
Update Setting Screen button. The modified PID values are then shown
on the Control Gain screen.
Figure 36. PID Window
PID Calculation Based on Input Values
The available range for the exciter time constant depends on the value entered for the generator time
constant. (The default value for the exciter time constant is the generator time constant divided by 6.) The
generator time constant value selected must be in the range of 1.00 to 15.00 seconds and in 0.05
increments. When the generator time constant value is 1.00, the available exciter time constant range is
0.03 to 0.50 in 0.01 second increments. When the generator time constant value is 15.00, the available
exciter time constant range is 0.30 to 3.00 in 0.01 second increments.
For example, when T'do is set at 2.0 seconds, Texc is 0.33. After specifying the input values, a set of PID
parameters (output data) is generated automatically. If T'do is set at 5.00 seconds, then Texc is 0.83
seconds. The calculated KP is 155.47, KI is 138.72, KD is 48, and Kg is 1.
PID parameters can be directly removed from, added to, or modified in the PID List Data. PID parameters
may also be saved into a file (pidlist.dat).
BE2000E BESTCOMS
™
Software