When harbour operation is active, the emergency genset is always first in the priority order. The power management system sends a
start command to the emergency genset, if it is not running when harbour operation starts. The other gensets may be stopped, but
the emergency genset keeps running to supply the busbar.
More information
See
EMERGENCY genset controller
,
Other EMERGENCY genset controller functions
for more information about the
test function and harbour operation.
7.1.9 Managing missing controllers
For various reasons, communication may be lost with one or more of the controllers in the section. To protect the section, by default
the power management system (PMS) automatically changes the remaining controllers to switchboard control. However, parameters
are available so that you can configure a different response if one or more controllers are missing. You can also set the minimum
number of missing controllers before the mode is changed under
Configure > Parameters > System > Monitoring > Missing
controllers
.
CAUTION
If controllers are missing, then the PMS cannot know their operating information, including the breaker positions. Evaluate
the risks before configuring these parameters
Parameters
Configure the parameters under
Configure > Parameters > System > Monitoring
.
Parameter
Range
Default
Notes
Mode while
controller
missing
•
Switchboard control
•
No mode change
Switchboard
control
If the minimum number of controllers are missing:
•
Switchboard control
: The PMS changes the mode of the
remaining controllers to switchboard control.
•
No mode change
: The PMS changes the mode of the remaining
controllers to the mode specified in
PMS mode while controller
missing
.
PMS mode
while controller
missing
•
No mode change
•
SEMI mode
•
AUTO mode
No mode
change
If the minimum number of controllers are missing, and
Switchboard
control
is not specified in
Mode while controller missing
:
•
No mode change
: The PMS does not change the mode of the
remaining controllers.
•
SEMI mode
: The PMS changes the remaining controllers to
SEMI mode.
•
AUTO mode
: The PMS changes the remaining controllers to
AUTO mode.
7.2 Connected, consumed and available power
7.2.1 Power calculations
The controllers continuously calculate the
nominal
,
consumed
and
available power
for each section. The power management
system (PMS) uses these values.
The controller uses two sets of power calculations:
•
PMS power
: The power sources that are under PMS control and available for automatic power management functions in the
section.
•
Connected power
: All the power sources in the section.
PMS power
PMS power is used for the power management calculations. PMS power only includes the power supplied by sources under PMS
control.
DESIGNER'S HANDBOOK 4189340911K UK
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