Woodward easYgen-3000XT Series, Руководство пользователя, Страница: 397 / 1205

If one genset is supplying the load in parallel with the mains and the generator load
exceeds the MOP minimum load threshold (parameter
╚═▷ 5767 ) minus the hysteresis
(parameter ╚═▷ 5769 ), the genset will be stopped.
The hysteresis is intended to prevent frequent starting and stopping of gensets in case of
small load variations.
• P
MN setpoint
– P
MN real
+ P
GN real active
< P
MOP minimum
– P
hysteresis MOP
•
4.4.5.5.3 Generator Selection
General notes
If a genset is to be started, the genset with the highest priority configured will be started.
If a genset is to be stopped, the genset with the lowest priority configured will be
stopped.
If all gensets have the same priority, the next genset is selected according to the size of
engine, i.e. the genset combination, which allows an optimum efficiency will be used.
If all gensets have the same rated load or this parameter is disabled, the remaining hours
until the next maintenance are considered. If these are also the same, the genset with
the lowest generator number will be started first or stopped last.
Priority order:
• 1. Priority (parameter ╚═▷ 5751 ) •
• 2. Efficiency (size of engines) (parameter ╚═▷ 5754 ) •
• 3. Service hours (parameter ╚═▷ 5755 ) •
• 4. Generator (device) number (parameter ╚═▷ 1702 ) •
The load-dependent start/stop function requires the following conditions have been met:
• The control has been placed in AUTOMATIC operating mode •
• A start request (Start req. in AUTO, Emergency run) is active •
• All LDSS parameters are configured identically for all members at the load share line •
( ╚═▷ “4.5.6.16 Multi-Unit Parameter Alignment” )
• The mains interchange load control (import/export power) has been enabled or the •
gensets are in islanded operation
• The conditions of the LogicsManager function "Load-dependent start/stop" have •
been fulfilled
ID Parameter CL Setting range
[Default]
Description
12930 LD start stop
(Load-dependent start
stop)
2 Determined by LogicsManager
86.86
[(0 & 1) & 1]
= 11915
Once the conditions of the
LogicsManager have been fulfilled,
the load-dependent start/stop
function is enabled.
Notes
397 easYgen-3000XT Series B37574
4 Configuration
4.4.5.5.3 Generator Selection
Released