ABB DCS 500 - 12-Pulse Control Structure Integration

Chapter 3 -Functional Description
3 - 6 DCS 500 12-Pulse Planning and Start-Up
Control structure
The illustration below shows how the 12-pulse logic is integrated in
the standard software (current controller)
TORQUE/CURRENT LIMITER
CURRENT CONTROL
CURR REF IN LIM
CURRENT CONTROL
10403
[BLOCK]
REF TYPE SEL
403
404
405
401
402
ARM CURR REF SLOPE
CURR LIM N
CURR LIM P
ARM CURR PI KP
ARM CURR PI KI
ARM CONT CUR LIM
ARM ALPHA LIM MAX
407
C:
408
C:
409
C:
412
C:
406
ARM ALPHA LIM MIN
DXN
C:
414
C:
413
CURR DER IN LIM
10404
ARM DIR
10402
C:
C:
12305
12306
12307
12308
SP
TSYN
(To figure 4)
7
8
9
(To figure 4)
(To figure 4)
ARM_CUR_ACT
ARM ALPHA
10401
(To firing unit)
12301
12302
12303
12304
ARM L
ARM R
C:
411
C:
410
SIG11
12526
SIG12
12527
FIGURE 5(9)
0
1
2
13605
3604
[PP_CURR_SLAVE]
IREF1
1209
C:
OPER_SYS
[TORQ REF]
FLUX REF1
[CURR REF]
[CURR STEP]
FLUX_N