Synchronization | Theory of Synchronizing | Synchronizing Examples | Generator Synchronization
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Synchronizing & Synchronizing Equipment :
Synchronizing & Synchronizing Equipment : Theory of Synchronizing: When closing a circuit breaker between two energized parts of the power system, it is crucial to match voltages on both sides of the circuit breaker before closing. If this matching or "synchronizing" process is not done correctly, a power system disturbance will result and equipment (including generators) can be damaged. In order to synchronize properly, three different aspects of the voltage across the circuit breaker must be closely monitored. The three aspects of the voltage are called the synchronizing variables and are:
1. The Voltage Magnitudes
2. The Frequency of the Voltages
3. The Phase Angle Difference Between the Voltages
Voltage Magnitude Synchronizing Variable: If the voltage magnitudes are not closely matched, a sudden rise in Mvar flow will appear across the circuit breaker as it is closed. For example, if a 345 kV circuit breaker were closed with a 20 kV difference in voltage across the open circuit breaker, a large Mvar flow would suddenly occur upon closing. The allowable voltage magnitude differences across the open circuit breaker are system specific. However, for general guidance, a difference of a few percent is unlikely to cause any serious problem.
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1. The Voltage Magnitudes
2. The Frequency of the Voltages
3. The Phase Angle Difference Between the Voltages
Voltage Magnitude Synchronizing Variable: If the voltage magnitudes are not closely matched, a sudden rise in Mvar flow will appear across the circuit breaker as it is closed. For example, if a 345 kV circuit breaker were closed with a 20 kV difference in voltage across the open circuit breaker, a large Mvar flow would suddenly occur upon closing. The allowable voltage magnitude differences across the open circuit breaker are system specific. However, for general guidance, a difference of a few percent is unlikely to cause any serious problem.
#Synchronizing
#TheoryOfSynchronizing
#SynchronizingExamples
@powersystemsoperation
@powersystemoperation
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