Controller Adjustment (Serial / Sequential Mode) - ABB DCS 600 MultiDrive Series Manual

Chapter 4 – Twelve–Pulse Serial / Sequential Configurations with DCS 600
Sequential mode
Controller ad-
justment (se-
rial / sequential
mode)
4 - 6
II F2
The sequential mode will be activated if parameter
settings for 12 – pulse serial operation
selected. The data transmission in the 12 – pulse link is equal to
the serial mode.
SEQUENTIAL 
0:

MODE

(47.01)
1:
Autotuning has not yet been implemented in 12 – pulse mode. It is
proposed to determine the controller values using a unit in normal
(6 – pulse) operation; in this case the output voltage will only be
half of that value available in 12 – pulse serial mode. The values
determined must then be appropriately corrected in 12 – pulse
mode:
•
It can be assumed, that the values for P-gain
and Discontinuous Current Limit
(43.03)
proximately halved.
•
The values for parameters ARM L
have to be halved, since the measured voltage values have
been halved at the moment of measurement.
Extra commutation reserve (parameter DXN
This parameter is effective only, if current feedback is also
present. If settings are made here, the current feedback
has to be present both at the 12 – pulse master and the
12 – pulse slave unit.
(15.16) = [3]
Both converters are
NORMAL
controlled with an equal
firing angle
Sequential control of the
SEQUENTIAL
firing angles; only one unit
changes its firing angle,
while the firing angle of the
other unit is at minimum or
maximum value.
(41.11)
DCS 600 Manual for 12 – Pulse Operation
within the
(47.01)
or (
15.16) = [4]
, I-gain
(43.02)
will be ap-
(43.06)
and ARM R
(41.12)
):
(42.03)
is