Siemens 6MD85, Manual

Page: 493 / 1256

On the secondary side, the increment ∆V
sec
is not linear. The largest ∆V
max,sec
in an increment results with the
increment to the highest stage (smallest ratio) and with maximum power-system voltage on the primary side.
[fobdnvrz-150816, 1, en_US]
If the control deviation and the bandwidth are thus correlated, this results in a minimal bandwidth that is to be
set:
[fospnvrz-150816, 1, en_US]
V
rated,sec
Secondary rated voltage of the transformer
V Primary tap voltage of the transformer of tap N
V Primary tap voltage of the transformer of tap N-1
V
max,prim
Maximum primary voltage of the transformer
V
max,sec
Maximum secondary voltage of the transformer
Parameter: T1 characteristic
•
Default setting
(_:114) T1 characteristic
=
Linear
Parameter: T1 delay
•
Default setting
(_:115) T1 delay
=
40 s
You can adjust the control action so that the smallest number of adjusting commands possible is necessary. To
do this, using
T1 characteristic
, you set the control response and, using
T1 delay
, you set a time
delay.
In the
Linear
setting (linear control response), the control response is independent of the voltage deviation.
A constant time delay applies here.
In the
Inverse
setting (inverse control response), the time delay is a function of the voltage deviation refer-
enced to
Target voltage 1
. The greater the control deviation, the faster the control response. The control
quality improves, but the switching frequency increases. The effective time delay results from:
[fovrzzet-211013, 2, en_US]
T
1
– Parameter
T1 delay
[fokonisk-211013, 2, en_US]
D = Control deviation
Control Functions
6.9 Voltage Controller
SIPROTEC 5, High-Voltage Bay Controller, Manual 493
C53000-G5040-C015-9, Edition 11.2017