The power is included in the PMS power calculations as follows:
•
GENSET controller :
◦
The controller is in AUTO mode.
◦
The genset is running.
◦
The generator breaker is closed (that is, the genset is connected).
•
EMERGENCY genset controller :
◦
The controller is in AUTO mode.
◦
The genset is running.
◦
The generator breaker and tie breaker are closed (that is, the genset is connected to the section).
•
SHAFT generator controller:
◦
The controller is under PMS control
◦
The breaker is closed.
◦
Note: Power take home (PTH) is a load, and not included in the PMS power.
•
SHORE connection controller:
◦
The controller is under PMS control
◦
The breaker is closed.
◦
Note: Ship-to-ship is a load, and not included in the PMS power.
Connected power
The connected power shows the overall supply and load situation for the section, without being restricted by the PMS state of the
power sources. It includes all the sources that are connected to the section (that is, breaker closed and supplying power).
INFO
The power from controllers under switchboard control is included in the connected power.
Nominal power
The nominal power (also called
P nom.
) is the power that the connected sources can supply.
For PMS power, the nominal power is the sum of the nominal power for the connected gensets in AUTO mode (and, if applicable, a
shaft generator or shore connection under PMS control).
For connected power, the nominal power is the sum of the nominal power for the connected sources:
Nominal power = Σ Nominal power of connected sources
Consumed power
The consumed power (also called
P used
) is produced by the gensets (and, if applicable, also the shaft generator and shore
connection). The controllers can therefore use the sources' AC measurements to calculate the consumed power.
INFO
The consumed power calculations assume that no unknown power sources are connected to the busbar.
The consumed power is also the sum of the power consumed by all of the loads in the system, for example, motors, pumps and
lighting.
For PMS power, the consumed power is the sum of the power produced by the connected generators in AUTO mode (and, if
applicable, a shaft generator or shore connection under PMS control).
For connected power, the consumed power is the sum of the power produced by the connected sources.
Consumed power = Σ Power from sources
DESIGNER'S HANDBOOK 4189340911K UK
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