104
9440300990 Rev J
Stability Tuning
DECS-250
Caution
PID values calculated by the Auto Tuning function are to be
implemented only after their suitability for the application has been
verified by the user. Incorrect PID numbers can result in poor system
performance or equipment damage.
Figure 100. Auto Tuning Window
A
PID Design Mode:
Set to either Pole Zero Cancellation or Pole Placement.
B
Power Input Mode:
Set to either PMG External or Shunt.
C
Start Auto Tune Button:
Begins the auto tuning process.
D
Save PID Gains Button:
Saves the calculated PID gains.
The File menu contains options for importing, exporting, and printing a graph (.gph) file.
FCR and FVR Modes
BESTCOMSPlus Navigation Path:
Settings Explorer, Operating Settings, Gain, FCR/FVR
HMI Navigation Path:
Settings, Operating Settings, Gains, FCR Gains or FVR Gains
Stability tuning can be tailored for optimum performance when operating in field current regulation or field
voltage regulation mode. BESTCOMS
Plus
FCR stability settings and FVR stability settings are illustrated
in Figure 101.
FCR Mode Stability Settings
The DECS-250 bases its field current output upon the following settings.
The proportional gain (K
p
)
A
is multiplied by the error between the field current setpoint and the actual field
current value. Decreasing K
p
reduces overshoot in the transient response. Increasing K
p
speeds the
transient response.
The integral gain (K
i
)
B
is multiplied by the integral of the error between the current setpoint and the actual
field current value. Increasing Ki reduces the time to reach a steady state.
Содержание DECS-250
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Страница 20: ...4 9440300990 Rev J Introduction DECS 250 ...
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Страница 32: ...16 9440300990 Rev J Voltage and Current Sensing DECS 250 ...
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Страница 108: ...92 9440300990 Rev J Power System Stabilizer DECS 250 Figure 85 PSS Function Blocks and Software Switches ...
Страница 114: ...98 9440300990 Rev J Power System Stabilizer DECS 250 Figure 96 PSS Parameter Settings ...
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Страница 126: ...110 9440300990 Rev J Mounting DECS 250 Figure 103 Overall and Projection Mounting Dimensions ...
Страница 127: ...9440300990 Rev J 111 DECS 250 Mounting Figure 104 DECS 250 Escutcheon Plate Dimensions ...
Страница 128: ...112 9440300990 Rev J Mounting DECS 250 Figure 105 Panel Cutting and Drilling Dimensions for DECS 250 Panel Mounting ...
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Страница 316: ...300 9440300990 Rev J Specifications DECS 250 ...
Страница 334: ...318 9440300990 Rev J Analog Expansion Module DECS 250 ...
Страница 341: ...9440300990 Rev J 325 DECS 250 Contact Expansion Module Figure 188 CEM 2020 Input Contact and Output Contact Terminals ...
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