Logic of the Master-Follower Method
[lo_parallel_voltage_contrl-master-follower, 1, en_US]
Figure 6-139
Logic of the Master-Follower Method
The Master-Follower method can be blocked using the automatic function in the systems control. The func-
tion is also blocked in case of a communication failure.
The Master device controls the voltage of the transformer. The Follower device updates its tap position
according to the Master device. When doing so, the maximum tap-position difference is taken into account. If
the tap-position difference is exceeded for a predefined time, an error is reported (
Error tap differ-
ence
). If the monitoring of a group detects that there is more than one Master device, this is reported and the
automatic operation is blocked.
Manual Operation Master-Follower
Changing the tap of the tap changer using the Master device leads to an adjustment of the taps by all Follower
devices within the group.
Control Functions
6.9 Voltage Controller
SIPROTEC 5, High-Voltage Bay Controller, Manual 471
C53000-G5040-C015-9, Edition 11.2017
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