DECS-200 Human-Machine Interface 2-23
Screen: \SETPT\PREP_SET (2.2)
The present control mode operating setpoint is driven to the pre-position value when the unit receives a
pre-position command.
AVR MODE - the automatic voltage regulator setpoint pre-position value
FCR MODE - the field current regulator setpoint pre-position value
Var MODE - the var controller setpoint pre-position value
PF MODE - the power factor setpoint pre-position value
Loop Gains
Screen: \GAIN\REG_GAIN1 (3.1)
STAB RANGE - the index into the internally defined PID table. Table 2-7 lists the automatic pre-defined
stability gain settings for the exciter field and the 20 stability settings.
AVR/FCR Kp - proportional gain coefficient used in the AVR/FCR loop
AVR/FCR Ki - integral gain coefficient used in the AVR/FCR loop
AVR/FCR Kd - derivative gain coefficient used in the AVR/FCR loop
AVR/FCR Td - derivative time constant used in AVR/FCR loop
Table 2-7. Automatic Stability Range Gain Settings Index
Excitation
Mode Setting
Generator Open
Circuit Time
Constant (T’do)
Generator
Exciter Time
Constant
(Texc)
Kp Ki Kd
1 1.0 0.17 42.20 115.20 4.433
2 1.5 0.25 66.50 150.00 8.750
3 2.0 0.33 87.16 167.90 13.670
4 2.5 0.42 104.50 175.80 18.960
5 3.0 0.50 119.00 177.80 24.500
6 3.5 0.58 131.30 176.40 30.220
7 4.0 0.67 141.80 173.10 36.060
8 4.5 0.75 150.90 168.80 42.000
9 5.0 0.83 158.80 163.90 48.010
10 5.5 0.92 165.70 158.70 54.080
11 6.0 1.00 171.80 153.60 60.200
12 6.5 1.08 177.20 148.50 66.350
13 7.0 1.17 182.10 143.60 72.540
14 7.5 1.25 186.50 138.90 78.750
15 8.0 1.33 190.50 134.40 84.980
16 8.5 1.42 194.10 130.10 91.230
17 9.0 1.50 197.40 125.90 97.500
18 9.5 1.58 200.40 122.10 103.800
19 10.0 1.67 203.20 118.40 110.100
Exciter Field
20 10.5 1.75 205.70 114.80 116.400
Screen: \GAIN\REG GAIN2 (3.2)
AVR Kg - loop gain used in AVR mode
FCR Kg - loop gain used in FCR mode
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