Woodward DSLC-2 - Woodward

Manual 37443A DSLC-2 - Digital Synchronizer and Load Control
© Woodward Page 63/226
Synchronizer Control
ID
Parameter
CL
Setting range
Default
Description
5729
Synchroniza-
tion GCB
2 Slip frequency./.
Phase matching
Phase
matching
Slip frequency: The synchronizer adjusts the generator frequen-
cy to a point greater than the busbar. The slip frequency is deter-
mined by the setting of Slip frequency setpoint offset (parameter
5502). The generator will always close to the bus at a higher fre-
quency, eliminating the possibility of reverse power.
Phase matching: The frequency controller adjusts the phase an-
gle of the generator to that of the busbar.
5502
Slip
frequency
setpoint
offset
2
0.00 to 0.50 Hz
0.10 Hz
The offset for the synchronization to the busbar. With this offset,
the unit synchronizes with a positive slip.
Example:
If this parameter is configured to 0.10 Hz and the busbar/mains
frequency is 60.00 Hz, the synchronization setpoint is 60.10 Hz.
5701
Positive
frequency
differential
GCB
2 0.02 to 0.49 Hz 0.18 Hz The prerequisite for a close command being issued for the GCB is
that the differential frequency is below the configured differential
frequency. This value specifies the upper frequency (positive val-
ue corresponds to positive slip > generator frequency is higher
than the busbar frequency).
5702
Negative
frequency
differential
GCB
2
-0.49 to 0.00 Hz
-0.10 Hz
The prerequisite for a close command being issued for the GCB is
that the differential frequency is above the configured differential
frequency. This value specifies the lower frequency limit (negative
value corresponds to negative slip > generator frequency is less
than the busbar frequency).
5703
Max. positive
phase
window GCB
2
0.0 to 60.0 °
7.0 °
The prerequisite for a close command being issued for the GCB is
that the leading phase angle between generator and busbar is be-
low the configured maximum permissible angle.
5704
Max. nega-
tive phase
window GCB
2
-60.0 to 0.0 °
-7.0 °
The prerequisite for a close command being issued for the GCB is
that the lagging phase angle between generator and busbar is
above the configured minimum permissible angle.
7513
Voltage
matching
2 Disabled /
Enabled
Enabled Enables or disables the synchronizer voltage matching function.
Independent on this setting the voltage control is still executed but
the synchronizer does not care about the voltage matching.
4541
Voltage
window
2
0.50 to 10.00 %
0.50 %
The maximum permissible voltage differential for closing the
breaker is configured here. If the difference between generator
and busbar voltage does not exceed the value configured here
and the generator- and busbar voltages are within the according
operating voltage windows, the "Command: Breaker Close" may
be issued.
NOTE: When Voltage matching (parameter 7513) is “Disabled”,
the voltage window is set to the maximum value of 10 %.
7555
Dead bus
closure
2
Disabled /
Enabled
Enabled
Enables or disables the synchronizer's automatic deadbus detec-
tion and breaker closure functions. When enabled, the synchro-
nizer will insure a breaker closure signal when a dead-bus is de-
tected. (This incorporates the dead busbar closure negotiation to
potential other DSLC-2 or MSLC-2 devices)
5820
Deadbus
detection
max. volt.
2 0 to 30 % 10 % Adjustable voltage in percentage of busbar rated voltage for
deadbus detection.
5705
Breaker
delay
2
40 to 300 ms
80 ms
The inherent closing time of the GCB corresponds to the lead-time
of the close command. The close command will be issued inde-
pendent of the differential frequency at the entered time before the
synchronous point.
3416
GCB close
hold time
2
0.10 to 0.50 s
0.50 s
The time of the pulse output may be adjusted to the breaker being
closed.
3420
GCB open
monitoring
2
0.10 to 5.00 s
2.00 s
If the "Reply: Breaker Open" is not detected as energized once
this timer expires, a "GCB fail to open" alarm is issued. This timer
initiates as soon as the "Open breaker" sequence begins.