This menu contains the adjustments of the synchronizer.
Figure 3-11: ToolKit – synchronizer
PID Frequency Control
ID Parameter CL Setting range Default Description
4539 Frequency
synchronizer proportional gain
2 0.01 to 100.00 0.80 Frequency sync gain determines how fast the synchronizer re- sponds to an error in speed or phase. Adjust gain to provide sta- ble control during synchronizing. Lower value to slow response.
4540 Frequency
synchronizer integral gain
2 0.00 to 20.00 0.50 Frequency sync integral gain compensates for delay in the syn- chronizer control loop. Prevents low frequency hunting and damp- ing (overshoot or undershoot). Lower value to slow response. 5505 Phase
matching gain
2 1 to 99 5 The Phase matching gain increases or decreases the influence of the phase angle deviation to the frequency control. Prevents fre- quency hunting and damping (overshoot or undershoot) when the synchronizer is enabled with phase matching function.
5506 Phase
matching df-start
2 0.02 to 0.25 Hz 0.05 Hz Phase matching is started if the frequency difference between the systems to be synchronized is below the configured value.
5707 Phase
matching CB dwell time
2 0 to 60.0 s 0.5 s Dwell Time: This is the minimum time that the system A voltage, frequency and phase angle must be within the configured limits before the breaker will be closed. Set to lower time for quicker
ID Parameter CL Setting range Default Description
5517 Start
frequency control delay
1 0 to 999 s 1 s The frequency controller is enabled after the configured time for this parameter expires.
PID Voltage Control
ID Parameter CL Setting range Default Description
5610 Voltage
synchronizer proportional gain
2 0.01 to 100.00 1.00 Voltage sync gain determines how fast the synchronizer responds to a voltage deviation. Adjust gain to provide stable control during synchronizing. Lower value to slow response.
5611 Voltage
synchronizer integral gain
2 0.01 to 100.00 0.50 Voltage sync integral gain compensates for delay in the synchro- nizer voltage control loop. Prevents low voltage hunting and damping (overshoot or undershoot) when the synchronizer is enabled. Lower value to slow response.
Synchronizer Control
ID Parameter CL Setting range Default Description
5730 Synchroniza- tion CB 2 Slip frequency./. Phase matching Slip frequency
Slip frequency: The frequency controller adjusts the frequency in
a way, that the frequency of the variable system is marginal greater than the fixed system. When the synchronizing conditions are reached, a close command will be issued. The slipping fre- quency depends on the setting of Slip frequency setpoint offset (parameter 5502).
Phase matching: The frequency controller adjusts the phase an-
gle of the system B to that of the system A. 4712 Slip
frequency setpoint offset
2 -0.50 to 0.50 Hz 0.10 Hz This value is the offset for the synchronization to the variable sys- tem to the fixed system. With this offset, the unit synchronizes with a positive or negative 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. If this parameter is configured to -0.10 Hz and the busbar/mains frequency is 60.00 Hz, the synchronization setpoint is 59.90 Hz. 5701 Positive
frequency differential CB
2 0.02 to 0.49 Hz 0.18 Hz The prerequisite for a close command being issued for the CB is that the differential frequency is below the configured differential frequency. This value specifies the upper frequency (positive val- ue corresponds to positive slip > system B frequency is higher than system A frequency).
5702 Negative
frequency differential CB
2 -0.49 to 0.00 Hz -0.10 Hz The prerequisite for a close command being issued for the CB is that the differential frequency is above the configured differential frequency. This value specifies the lower frequency limit (negative value corresponds to negative slip > system B frequency is less than system A frequency).
5703 Max. positive
phase window CB
2 0.0 to 60.0 ° 5.0 ° The prerequisite for a close command being issued for the CB is that the leading phase angle between system B and system A is below the configured maximum permissible angle.
5704 Max. nega-
tive phase window CB
2 -60.0 to 0.0 ° -5.0 ° The prerequisite for a close command being issued for the CB is that the lagging phase angle between system B and system A 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
ID Parameter CL Setting range Default Description
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 system A and system B voltage does not exceed the value configured here and the system A/B 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)
NOTE: In Menu 5 you find more settings related to the dead bus- bar closure.
5820 Deadbus
detection max. volt.
2 0 to 30 % 10 % Adjustable voltage in percentage of system A or B rated voltage for deadbus detection.
5705 Breaker
delay
2 40 to 300 ms 80 ms The inherent closing time of the CB 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.
3417 CB 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.
3421 CB 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 "CB fail to open" alarm is issued. This timer initiates as soon as the "Open breaker" sequence begins. 7514 Auto
resynchroni- zation
2 Disabled / Enabled
Enabled Enables or disables the synchronizer function after achieving syn- chronization. Synchronization is assumed to have been achieved if one Reclose delay time interval passes with the “CB Aux” con- tact closed.
Disabled: If this setpoint is set to disabled, the synchronizer is set
to auto-off mode after synchronizing. Has no effect on the control.
Enabled: If the “CB Aux” contact opens and an operating mode is
selected (Run, Check, or Permissive), the synchronizer will auto- matically restart in the selected operating mode. On restart, the synch timeout timer and close attempts count are reset to their specified values.
3419 CB
maximum closing attempts
2 1 to 10 5 The maximum number of breaker closing attempts if the Reclose
limit alarm (parameter 7556) is “Enabled”. If “Disabled” this para-
meter is disregarded. See chapter 4, “Synchronizer Description”, for close command information.
4534 Reclose
delay
2 1 to 1000 s 2 s Is the number of seconds between attempts to close the circuit breaker. If the “CB Aux” contact remains closed for one reclose delay interval, synchronization is assumed to have occurred. If the “CB Aux” contact opens during the reclose delay interval, it is considered a failed closed attempt. The MSLC-2 control will re- main in the selected operating mode (run, check, or permissive) during the reclose delay interval.
7556 Reclose
limit alarm
2 Disabled / Enabled
Enabled Enables or disables the alarm generated when reaching the max- imum close attempts.
7557 Synchronizer
timeout alarm
2 Disabled / Enabled
Disabled This setting enables or disables the alarm generated by exceed- ing the synch timeout interval without achieving synchronization.
ID Parameter CL Setting range Default Description 5503 Freq. control setpoint ramp 2 0.10 to 60.00 Hz/s
2.50 Hz/s The slope of the ramp is used to alter the rate at which the con- troller modifies the setpoint value. The greater the value, the faster the change.