7.4.2 Load-dependent start configuration
This configuration defines when the power management system (PMS) automatically starts gensets. The PMS starts gensets when
the section load increases, for example, if the operator starts some equipment.
These parameters only apply to GENSET controllers in AUTO mode.
INFO
If the PMS available power is negative, the PMS starts another genset immediately, and does not wait for the load-
dependent start timer.
Parameters
Configure the parameters under
Configure > Parameters > Power management rules > Configuration # > Load-dependent
start/stop > Configuration
(where # is 1 to 8) to define the overall load-dependent start and stop configuration.
Parameter
Range
Default
Notes
Power
selection
•
Calculation in P
•
Calculation in S
Calculation in
P
•
Calculation in P
: The calculations are based on the active power (P).
•
Calculation in S
: The calculations are based on the apparent power (S).
Method
•
Power
•
Percent
Power
•
Power
: The calculations are based on the PMS available active power in
kW, or the PMS available apparent power in kVA.
•
Percent
: The calculations are based on the total consumed active (or
apparent) power as a percentage of PMS nominal active (or apparent)
power.
Note: The
Percent
method can be better if the genset sizes are very
different.
Configure the parameters under
Configure > Parameters > Power management rules > Configuration # > Load-dependent
start/stop > Start 1
(where # is 1 to 8) to define the first set of start parameters. By default, the PMS uses these parameters.
Parameter
Range
Default
Notes
Enable
Not enabled,
Enabled
Enabled
Not enabled
: The PMS ignores this set of parameters.
Enabled
: The PMS uses this set of parameters.
P available
limit
1 kW to 9 GW
100 kW
Calculation in P
and
Method
=
Power
must be selected, otherwise this parameter is
ignored.
If this amount of PMS power is not available for the delay period, the PMS starts the
next genset in the priority order.
S available
limit
1 kVA to 9 GVA
100 kVA
Calculation in S
and
Method
=
Power
must be selected, otherwise this parameter is
ignored.
If this amount of PMS apparent power is not available for the delay period, the PMS
starts the next genset in the priority order.
Load limit
1 to 100 %
90 %
Method
=
Percent
must be selected, otherwise this parameter is ignored.
The load percentage is the total power consumed, as a percentage of the PMS
nominal power. If the load percentage exceeds this parameter for the
Delay
period,
the PMS automatically starts and connects another genset.
If
Calculation in P
is selected, this limit is based on the percentage of active power.
DESIGNER'S HANDBOOK 4189340911K UK
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