Manual 02007
DSLC Digital Synchronizer and Load Control
Woodward
45
12. Open the isoch/droop switch in series with the CB Aux contact input to
terminal 47 of the DSLC control. If such a switch is not installed, temporarily
remove the connection to terminal 47 to select droop mode.
13. Turn the synchronizer mode switch to Run. The synchronizer should pull the
generator smoothly into phase lock and issue a breaker closure command.
Increase the engine speed setting slightly to add generator load.
14. Proceed to Final Synchronizer Setup.
Slip Frequency Synchronizer
Do the following steps to set up the synchronizer dynamics for use as a slip
frequency synchronizer. For phase matching synchronizing, see the procedure
above.
1. Complete the phase matching synchronizer setup before continuing.
2. Turn the synchronizer mode to Off. Set the Slip Frequency Ref set point to
the desired slip rate. Set engine speed slightly slow.
3. Turn the synchronizer mode to Check. The synchronizer should drive
engine speed so that phase rotation is smooth and at the correct rate as
indicated on a synchroscope or by observing the Slip Frequency set point
on Menu 7. If the synchronizer is too slow to react when switched from off to
check mode, increase Sync Gain by a factor of two. If the synchronizer
action is too aggressive when switched to check mode, reduce the Sync
Gain by a factor of two. Repeat until the synchronizer picks up correct
phase rotation at a satisfactory rate.
4. Observe the smoothness of phase rotation. If a slow hunt is observed, as
indicated by slowing and speeding up of the synchroscope during rotation,
increase Sync Stability by a factor of two and repeat step 4. If rapid changes
in slip frequency occur, decrease Sync Stability by a factor of two.
5. Repeat steps 3 and 4 with smaller adjustment steps until satisfactory
performance is obtained. Note that it may not be possible to remove all slow
hunting in slip frequency, and this will not adversely affect synchronization.
6. Verify synchronizer performance under all expected operating conditions,
such as synchronizing from higher or lower speeds.
7. If Voltage Matching or the VAR/PF Control is to be used, do the setup in the
Voltage Matching Adjustment section below.
8. If correct droop operation described above has been obtained, proceed to
step 9. Otherwise, verify correct droop operation described above.
9. Open the isoch/droop switch in series with the CB Aux contact input to
terminal 47 of the DSLC control. If such a switch is not installed, temporarily
remove the connection to terminal 47 to select droop mode.
10. Turn the synchronizer mode switch to Run. The synchronizer should pull the
generator smoothly into the correct slip rate and issue a breaker closure
command. If the synchronizer will not issue a closure command, verify that
the Max Slip Window and Max Phase Window set points are set correctly.
Wider window settings will decrease the time required to synchronize.