Siemens 6MD85, Manual

Page: 468 / 1256

changed using the control
Parallel group
. Thus, you assign the device to a parallel-control group. You can
do this from
remote
or
locally
on the device. If
No mode
is set for the parallel operation, no group assign-
ment takes place.
Parallel-Control Detection via Topology
In addition, you have the option to detect the group assignment in parallel operation based on the position of
the disconnectors and circuit breakers. To report its status, every disconnector and circuit breaker is equipped
with a circuit-breaker auxiliary contact. These binary signals can be processed in a CFC chart and can be
adapted dynamically to the status of the system.
The signals
Parallel group
,
Remote parallel mode
, and
Parallel mode active
are transmitted
via the GOOSE communication between the other transformers in the group.
[lo_proxy-logic-part_03, 1, en_US]
Figure 6-134 Logic of the Blocking of Automatic Operation in the ParallelProxy
1) Only applies to the Master-Follower method
The signals
automatic operation
,
automatic-block. local
,
Health
, and
Remote parallel
mode
are transmitted via the GOOSE communication between the other transformers in the group.
If the other voltage controllers in the group are set to the mode
No mode
or if the communication is
disturbed, the automatic operation is blocked. The blocking is reported. If a fault in the tap position is detected
via the difference in the tap positions of the transformers, the indication
Error tap difference
is issued.
Control Functions
6.9 Voltage Controller
468 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017