Page 80 - Engine IQflip'21
P. 80
Load sharing – why?
In island mode, the genset/module is the only power source In island mode both active and reactive power need
for the connected consumer. The genset is controlled to keep to be shared between the gensets.
the speed to a set value (50Hz = 1500/1000 rpm, 60Hz = 1800,
1500 (with gearbox) or 900 rpm) delivering power at the • Reactive power is typically shared via voltage droop
frequency required by the consumers.
• Active power is typically shared via electronic
When two or more units are providing power to the local voltage sharing signals
consumers, it is absolutely important that both engines
turn at the exact same speed. For stable operation with all units providing the same power
Think of it like two cyclists on a tandem bike, if one slows down output, INNIO Jenbacher uses and active load sharing line
in pedaling, the other one has to pedal much harder to keep based
the speed at the same level. on an mA signal exchange.
The same holds true for two engines in parallel, Other manufacturer use different means of load sharing
if one turns faster, it would take load from the one that turns (e.g. voltage signal, signals via bus connection), if no
slower until it goes in overload and eventually would shut electronic signal is exchanged, then the load sharing can be
down. done
via the so called „speed droop mode“ in which the engine
speed set point is set dependent of the active load
(e.g. idle mode = 1560rpm, full load = 1500 rpm).
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