NOTE:
If more than one binary input for MinRunPower activation is closed MinRunPower setpoint with higher
number is used (i.e. binary inputs with higher number have higher priority). When no binary input is closed,
then minimal running power is 0.
NOTE:
All banks cooperating together in Power management must have the same Minimal Running Power set
selected.
It is possible to use virtual shared peripheries for distribution of the binary signal activating LBI MinRun
Power 1,2 or 3 among controllers over the CAN bus.
1.4. Control Groups
The physical group of the banks (i.e. the site) can be separated into smaller logical groups, which can work
independently even if they are interconnected by the CAN2 bus. The logical groups are intended to reflect
the real topology of the site when the site is divided into smaller bank groups separated from each other by
bus-tie breakers. If the bus-tie breakers are closed the sub-groups have to work as one large group and if
the bus-tie breakers are open, the sub-groups have to work independently.
• The group which the particular controller belongs to is adjusted by the setpoint Pwr management:
Control group. If there is only one group in the site, adjust the setpoint to 1 (=COMMON).
• The information which groups are currently linked together is being distributed via the CAN. Each
controller can provide information about one BTB breaker. The breaker position is detected by the
input GroupLink (i.e. this input is to be connected to the breaker feedback).
• The two groups which are connected together by the BTB breaker mentioned above are adjusted by
setpoints Pwr management: GroupLinkLeft and Pwr management: GroupLinkRight.
NOTE:
The "group link" function is independent on the group, where the controller itself belongs to. The controller
can provide "group link" information about any two groups.
• If the "group link" is opened the two groups act as two separated groups. If it is closed the roups act
as one large group.
The picture below shows an example of a site with 4 gen-sets separated by a BTB breaker into two groups
of 2. The BTB position is detected by the controllers 2 and 3. The reason, why there are 2 controllers used
for detection of the BTB position, is to have a backup source of the group link information if the primary
source (controller) is switched off.
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