Manual 26086 EGCP-2 Engine Generator Control Package
Woodward 71
The EGCP-2 Control has four core modes of generator load control operation.
These four modes are:
• Droop
• Isochronous Load Sharing
• Base Load
• Process Control
The specific mode of generator control that the unit is in at any given time can be
monitored on the Control Overview Menu.
Here is a description of each of these load control modes, and the various
operating states that will put the EGCP-2 into each respective load control
operation.
Droop
Droop Load Control in the EGCP-2 uses the sensed KW on the generator to
provide negative feedback to the speed reference of the speed control governor
through the speed bias output. This will result in a decrease in generator
frequency as the load is increased while operating as a single unit on an isolated
bus. Increasing the Speed Raise input while operating in this manner will
increase the speed of the engine gradually, thereby increasing the frequency of
the generator set.
While operating in parallel with the mains, droop operation provides KW load
control of the generator through the speed raise and speed lower inputs to the
EGCP-2. Since the mains determine the frequency of the generator, changing
the speed reference while in parallel with the mains causes a change in KW.
Droop load control is typically only utilized during commissioning of the EGCP-2.
It allows complete manual control of the generator load while in parallel with the
mains.
The EGCP-2 can only be operated in droop if the configuration tuning menu
setpoint labeled “ Load Control” is changed to the “Droop” value, or if the unit is
operated with the Generator CB Aux input open while connected to a load, or to
the mains. No other operations, or software setpoints can change the droop load
control mode setting.
Figure 4-1. Droop Mode
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