Kohler EKOZD Series Service page 229

System Power Factor Baseload Integral Gain
The System Power Factor Baseload Integral Gain
determines the contribution of the reactive power
control integral term to the voltage bias. The integral
term ramps at a rate directly related to the difference
between the reactive power target calculated from the
real power and the power factor target set by the
external voltage bias and the percent reactive loading of
this individual generator. The integral term ramps the
voltage bias up when the reactive power target is
greater than the generator reactive load.
Range: 0.01 – 100.00
Default: 1.00
System Power Factor Baseload Derivative Gain
The System Power Factor Baseload Derivative Gain
determines the contribution of the reactive power
control derivative term to the voltage bias. The
derivative term is directly related to the rate of change in
the difference between the reactive power target
calculated from the real power and the power factor
target set by the external voltage bias and the percent
reactive loading of this individual generator. The
derivative term increases the voltage bias when the
difference between the baseload setpoint and the
generator reactive load increases.
Range: 0.01 – 100.00
Default: 1.00
12.6.6 Generator Management
Generator Management provides logic to determine
how many generators are required to support the load
on the generator system and which generators are the
most desirable to run. If Generator Management is
disabled, all available generators will run as long as a
start signal is received.
Control Mode
The Control Mode parameter controls the Order
Selection Method for Generator Management. The
available Methods are:
Manual/Fixed
D
The Generator Start/Stop Order is manually
selected. In this mode, the user sets the order of each
generator at the
Management retains the order (there is no automatic
re-sort during operation).
TP-6953 7/19
controller and Generator
Note: All generators must have different orders. If
two or more generators have the same
order, Generator Management is disabled
(all available generators will run, but no fault
will be displayed on the controller). The
system will attempt to resolve order
conflicts, but this may require manual
intervention, especially if more than one
order is changed simultaneously (using
SiteTecht). If generators are added to or
subtracted from the paralleling system, the
system may see an order conflict—resulting
in a reassignment of the orders in the
system (the order for any generator could
change from the previous setting).
Manual mode can be used in a scenario where
certain generators are preferred to run more
frequently for any reason (such as position, sound
level, fuel efficiency, fuel type, etc.)
The need for manual mode should decrease as
additional automatic modes are added.
Runtime
D
The Generator Start/Stop Order
automatically by the controller based on the runtime
hours on each generator. In this mode, the generator
with the lowest runtime hours will be assigned the
lowest order (starting first, stopping last), with each
sequential order number
generators of increasing runtime hours. The intent is
to equalize runtime hours between the units.
If the generator system is supplying the load,
Generator Management implements a Runtime
Threshold to avoid starting and stopping generators
every 0.1 hours. The Runtime Threshold is added to
the runtime hours of generators that are not running
(for the purpose of comparison), preventing
excessively frequent starting and stopping of
generators.
If all the generators are running, the Order re-sorts
automatically any time the runtime hours of a higher
order generator drop below the hours on a lower order
generator. This will not typically occur while all
generators are running, as they will all be acquiring
runtime hours at the same rate.
If a generator starts because the load increases, the
Order may re-sort as soon as it connects to the
paralleling bus, hence the runtime hours will be
equalized before the difference reaches the threshold.
Runtime control mode is intended for application
where the generators require wear-leveling, such as
a prime-power application.
Section 12 Paralleling System Information
is selected
being assigned to
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