MR ECOTAP VPD CONTROL PRO, Руководство по эксплуатации

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8 Operation
Maschinenfabrik Reinhausen GmbH 2018 100 5252433/02 EN ECOTAP
®
VPD
®
CONTROL PRO
Note that the following prerequisites must be met for the "circulating reactive
current minimization" parallel operation method:
▪ You have to use current transformers with the same rated values for all
transformers in parallel operation.
▪ If you wish to operate in parallel operation with existing devices, you have
to activate the Retrofit TAPCON® 2xx parameter.
For the circulating reactive current minimization parallel operation method
with CAN communication, you have to set the following parameters:
▪ Activate parallel operation
▪ Parallel operation method: Circulating reactive current
▪ CAN bus address
▪ Circulating reactive current sensitivity
▪ Circul. reactive current blocking limit
▪ Error if no communication present
▪ Behavior if no communication present
▪ Parallel operation error delay time
8.9.1.3 Circulating reactive current minimization without CAN bus
communication
With this method, you can operate several voltage regulators without a com-
munication connection (CAN bus) in parallel with circulating reactive current
minimization.
Desired cosφ
Desired cosφ
U, I, (cosφ)
T1: U, I, (cosφ) T2: U, I, (cosφ)
M AVR M AVR
T1 T2
Figure 67: Circulating reactive current minimization without CAN bus communication
The circulating reactive current is calculated using the desired power factor
parameter, the desired load stress type parameter, and the measured trans-
former current. An extra control deviation proportional to circulating reactive
current is added to the independently regulating voltage regulators as a cor-
rection for the control deviation determined on the basis of the measurement
voltage. This extra control deviation depends on how much the measured
power factor deviates from the desired power factor.