Power management status
Enabled The power management system is enabled when there is at least one
GENSET controller in AUTO mode, and where that genset is either
connected or ready to start. However, the power management system is
limited if there are not enough GENSET controllers in AUTO mode to
supply the load.
Partially
enabled
The power management system is partially enabled if all the GENSET
controllers are in SEMI mode. The controllers can share the load and
restore power after a blackout. However, there is no automatic genset start
or stop. The power management system does not include the available
power from connected GENSET controllers in SEMI mode in the available
power calculations.
Disabled The power management system is disabled if a controller for connected
equipment is under switchboard control. However, load sharing is still active
in those controllers that the power management system controls.
If there is a blackout, then the equipment under switchboard control is no
longer connected automatically. The power management system is then
fully enabled for the controllers under PMS control and manages the
blackout recovery.
Power availability
The controllers share information across the DEIF network, so that each controller can calculate the available power for the section.
The PMS power available calculation is used to determine when to start and stop gensets, and to respond appropriately to requests
from heavy consumers.
More information
See Power calculations for more information.
Efficient operation
The power management (that is, genset start, stop and load sharing) can be configured to maximise the system's fuel efficiency.
Multi-master control
The power management calculations are all done by each controller, for true multi-master control. This means that if a controller
fails, the system can continue to function (as far as possible).
The following sketch shows an example of the information flow for the load-dependent start function.
DESIGNER'S HANDBOOK 4189340911K UK Page 208 of 521
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