OT2106A Electronic Engine Governor Speed Controller
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When the generator parallel with unlimited network, the network frequency does not change. In order to
keep the operating stability, speed droop mode must be used. Turn the speed droop potentiometer in the middle
position, parallel generators with the network, and increase the speed trim potentiometer (or rated speed
potentiometer) until the engine meets the required load capacity.
If speed droop control is excessive, the engine will run overspeed when suddenly unloading, meanwhile,
it may also lead to engine response lag respect to the load; If speed droop control is too small, the engine may
be unstable, similar to improper adjustment of gain and stability potentiometers.
For an isolated power generators, usually setting the speed droop rate to a specific value is necessary, to
prevent excessive overspeed when the load changes.
4.4 General Operation
1. closed normal shutdown switch, disconnect the rated speed switch;
2. If the drag speed is less than the minimum control speed, close the overspeed protection switch,
otherwise cut off the switch;
3. Set the speed trim potentiometer in the middle position (when commissioning);
4. Close the power switch to power up the speed controller and actuator;
5. Drag the engine and start;
6. Run the engine into idle state, cut off the overspeed protection switch, wait for the cooling water,
lubricating oil reach the required temperature;
7. Close the rated speed switch, the engine accelerates to the rated speed;
8.If running stand-alone, close load switch in groups and load;
If
paralleling
with others, adjust the speed trim potentiometer, synchronize with other generators,
parallel
and share the load;
If
paralleling
with network, adjust the speed trim potentiometer, s synchronize with network,
parallel
and
share the load;
9. Turn speed trim potentiometer counterclockwise or cut off load switch one by one until load is empty,
off network;
10. Disconnect the rated speed switch so that the engine runs to idle state;
11. Shutdown: stop oil supply or stop gas supply or cutoff shutdown switch;
12. Turn off the power switch, turn off the power.
五、
Principle
The engine control system is made up of speed sensor which was connected to the engine flywheel
housing and the actuator which was used to control on oil supply, etc. All of device together complete the
precise control of the engine speed. Speed control system structure is shown in figure 5-1.
