Siemens 6MD85, Manual

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Grid Coupling Transformer only:
Parameter: Number of target voltage
•
Default setting
(_:16351:164) Number of target voltage
=
1
With this parameter, you specify the number of available
target voltages
(
1 W1/2
to
4 W1/2
). You can
select a target voltage from the available ones using the function key, communication, or binary input.
Note:
Keep in mind that the parameter
Number of target voltage
cannot be influenced by way of the
settings group switching.
You can specify the
target voltages
(
1 W1/2
to
4 W1/2
) in primary, secondary, or in percent.
For the activation of the target voltage 1 to 4 via a binary input, you need a CFC chart.
Parameter: Target voltage 1 w1
•
Default setting
(_:16351:112) Target voltage 1 w1
=
110.000 V
Parameter: Target voltage 1 w2
•
Default setting
(_:16351:146) Target voltage 1 w2
=
110.000 V
Parameter: Target voltage 2 w1
•
Default setting
(_:16351:165) Target voltage 2 w1
=
110.000 V
Parameter: Target voltage 2 w2
•
Default setting
(_:16351:168) Target voltage 2 w2
=
110.000 V
Parameter: Target voltage 3 w1
•
Default setting
(_:16351:166) Target voltage 3 w1
=
110.000 V
Parameter: Target voltage 3 w2
•
Default setting
(_:16351:169) Target voltage 3 w2
=
110.000 V
Parameter: Target voltage 4 w1
•
Default setting
(_:16351:167) Target voltage 4 w1
=
110.000 V
Parameter: Target voltage 4 w2
•
Default setting
(_:16351:170) Target voltage 4 w2
=
110.000 V
Parameter: Bandwidth
•
Default setting
(_:113) Bandwidth
=
1.0 %
With the
Bandwidth
parameter, you specify the voltage range where no control action higher or lower is to
occur at the
Target voltage 1
. If the actual voltage is outside the bandwidth referenced to the
Target
voltage 1
, no correction takes place.
Calculation of the
Bandwidth
:
i
i
NOTE
When calculating the
Bandwidth
B, keep the maximum accepted voltage deviation in the electrical power
system and the tap voltage of the tap changer on the secondary side of the transformer in mind. Select the
bandwidths so that it is not passed through within an increment.
i i
NOTE
Instable Controlling (Hunting)
The tolerance band is defined by the double bandwidth. If you select the bandwidth – and thus the admis-
sible control deviation D – in such a way that the tolerance band is smaller than the step adjustment of the
transformer, then, with the next step adjustment operation, the voltage controller adjusts over the other
side of the band after exceeding the tolerance band. In this case, no stable controlling is possible. This
operation is also called
Hunting
. Keep also in mind that the load of the tap changer, that is the amount of
operated tap changes, increases with lower bandwidth.
Control Functions
6.9 Voltage Controller
492 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017