Woodward DSLC, Installation And Operation Manual, Page: 63 / 114

Manual 02007 DSLC Digital Synchronizer and Load Control
Woodward 57
17. If it is desired that the high and low limit switches also activate the High Limit
and Low Limit relay driver outputs, set the Process Switches set point to
Enabled.
18. Verify dynamic performance is satisfactory under all expected operating
conditions, then press the “SAVE” key on the Hand Held Programmer to
save the dynamic and other modified settings.
19. Record all set points on Menu 3 in their respective locations in Appendix A.
This completes setup and adjustment of the DSLC Process Control function.
VAR/PF Control Adjustments
This section describes the setup and adjustment of the DSLC VAR/PF Control
function. The VAR/PF control input is the average of A, B, and C phase power
factors in PF control, and the sum of A, B, and C kVARs in VAR control. The
values of kVARs and average power factor are available on Menu 7.
NOTE
VAR/PF Control effectiveness depends on voltage regulator performance.
Adjustment of voltage through raise commands to a MOP will result in slow
reference tracking. It may also be necessary to adjust the voltage regulator
stability to achieve desired results. Consult the voltage regulator manual for
instructions.
1. Verify that the voltage matching adjustments above have been done.
2. Select Menu 4 and set VAR/PF Gain and VAR/PF Stability to their default
values.
3. Set Rated KVARs set point to the generator manufacturer's kVAR rating. If a
kVAR rating is not provided, set to 60% of the kVA rating.
4. Set KVAR Reference set point to desired kVAR load.
5. Set PF Reference to desired power factor.
6. Parallel the generator with the utility bus or an isolated bus capable of
absorbing unit load. Adjust load to approximately 50% of machine capacity.
7. Open both the Voltage Raise and Voltage Lower switch contacts by
selecting “Manual” position on the VAR/PF Control Mode switch. Select
Menu 4 and set VAR/PF Control Mode set point to PF Control.
8. Manually raise or lower the voltage to shift the power factor 0.1 to 0.2 away
from the PF Reference set point. Select the “Auto” position on the VAR/PF
Control Mode switch. The Power Factor Control should adjust the voltage
regulator to bring the power factor smoothly into control.
9. If the power factor is unstable, reduce VAR/PF Gain. If reducing VAR/PF
Gain increases instability, adjust VAR/PF Stability in the direction required to
achieve stability.