MR ECOTAP VPD CONTROL PRO, Руководство по эксплуатации, Страница: 75 / 192

8 Operation
Maschinenfabrik Reinhausen GmbH 2018 75 5252433/02 EN ECOTAP
®
VPD
®
CONTROL PRO
TDSC Pmax/Pmin
You can use these parameters to set the maximum and minimum active
power value at which the maximum and minimum active power-dependent
desired value is to be used for regulation.
1. Go to Settings > Parameters > Control > TDSC Pmax/Pmin .
2. Enter active power for maximum/minimum desired value.
3. Press the Accept button to save the modified parameter.
8.4.2 Bandwidth
You can use this parameter to set the maximum permissible deviation in
measured voltage U
actual
from the desired value U
desired
. The following section
describes how you determine and set the bandwidth.
Determining bandwidth
In order to set the correct value, the transformer's step voltage and nominal
voltage must be known. Note that a large bandwidth will result in a large
control deviation.
The bandwidth must always be greater than the following value:
Figure 56: Calculation of minimum bandwidth
U
n-1
Step voltage of tap position n-1
U
n
Step voltage of tap position n
U
nom
Nominal voltage
The following transformer values are used to determine the minimum band-
width:
Nominal voltage U
nom
= 11,000 V
Step voltage in tap position 4 U
Step4
= 11,275 V
Step voltage in tap position 5 U
Step5
= 11,000 V