Figure. 5.5.7 - 180. Simplified presentation of synchronizer operation
The synchronizing function uses voltage signals from each side of the circuit breaker to be closed.
• The amplitude difference between the two voltages is used to send "Increase" and "Decrease"
commands to the generator’s voltage regulator. The pulse length for these commands can be
set, and it is automatically adjusted depending on the difference between the two measured
signals.
• The frequency difference between the two voltages (the slip frequency) is used to send
"Increase" and "Decrease" commands to the turbine’s speed governor. The pulse length for
these commands can be adjusted individually to take into account turbine governors with
different speeds. The pulse length is automatically adjusted depending on the difference
between the two measured signals.
• Settings can be adjusted to only allow positive slip to avoid reverse power at synchronizing.
• When the amplitude, the speed, and the phase-angle between the two voltages match (within
pre-set limits), a "Close" command signal is sent to the generator's circuit breaker.
Pre-closing time can be used to allow for delay time in a circuit breaker and any auxiliary relays. The
pre-closing angle is adjusted automatically depending on the slip frequency.
The outputs of the function are the following signals:
• Voltage Magnitude Difference Ok
• Voltage Frequency Difference Ok
• Voltage Angle Difference Ok
• Blocked
• Running
• Increase Voltage
• Decrease Voltage
• Increase Frequency
• Decrease Frequency
• Breaker Close Pulse
• Long Sync Time
• Nets Standstill
• Nets Departing
• Nets Enclosing
The inputs for the function are the following:
Genera
Generattor Commander
or Commander
Instruction manual
Version: 2.07
342
© Arcteq Relays Ltd
IM00001
Содержание Generator Commander
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