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Chapter 5
CGCM-DLR Unit Startup
134
VAR Control
Perform this test with the generator operating in parallel with a large power
source that is maintaining constant voltage.
Follow these steps to test the VAR control operation.
1. Place the voltage control in Droop mode.
2. To produce a constant power of approximately 25% of rated output, adjust
the prime mover.
3. Verify that the VAR setpoint is adjusted to the produced VARs.
In the following step, be prepared to transfer back to AVR Droop mode if
the excitation increases or decreases suddenly.
4. Transfer to VAR Control mode.
5. Adjust the VARs to 30% of the rated VA value.
6. To determine performance during the following step, monitor the exciter
field current and metered VARs.
7. Perform a 5% step of the VAR setpoint and observe the response of the
automatic VAR control.
8. Adjust gains as required to achieve the desired result, and run the test
again.
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
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