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Which of the following is NOT a condition to be satisfied for the synchronisation of an alternator?
- a)Rating of the alternator must be the same as other alternators
- b)Phase of the alternator must be identical with the phase of busbar voltage
- c)Terminal voltage of the alternator must be same as busbar voltage
- d)Frequency of the alternator must be same as busbar voltage
Correct answer is option 'A'. Can you explain this answer?
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Which of the following is NOT a condition to be satisfied for the sync...
Synchronization of alternator means connecting an alternator into the grid in parallel with many other alternators, which is in a live system of constant voltage and constant frequency.
Before connecting an incoming alternator with an already operating alternator, the following conditions must be satisfied:
- Equal voltage: The terminal voltage of incoming alternator must be equal to the bus-bar voltage.
- Same frequency: The frequency of generated voltage must be equal to the frequency of the bus-bar voltage.
- Phase sequence: The phase sequence of the three phases of alternator must be similar to that of the grid or busbars.
- Phase angle: The phase angle between the generated voltage and the voltage of the grid must be zero.
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Which of the following is NOT a condition to be satisfied for the sync...
Introduction:
Synchronizing an alternator with a busbar is an essential step in connecting the alternator to a power system. It ensures that the alternator operates in synchronization with the rest of the system, maintaining a stable and reliable power supply. There are certain conditions that need to be satisfied for successful synchronization.
Condition for Synchronization:
When synchronizing an alternator with a busbar, the following conditions must be satisfied:
1. Phase Synchronization:
The phase of the alternator must be identical to the phase of the busbar voltage. This means that both the alternator and the busbar must have the same phase angle at the time of synchronization. If there is a phase difference, it can cause severe circulating currents and damage to the alternator and the power system.
2. Frequency Synchronization:
The frequency of the alternator must be the same as the busbar voltage. The alternator must generate power at the same frequency as the power system to ensure a smooth transfer of power. If there is a frequency difference, it can lead to instability and fluctuations in the power system.
3. Voltage Synchronization:
The terminal voltage of the alternator must be the same as the busbar voltage. This ensures that the voltage levels are matched, and there are no voltage imbalances during synchronization. If there is a voltage difference, it can result in excessive reactive power flow and affect the stability of the system.
4. Speed Synchronization:
The speed of the alternator must be close to the synchronous speed. Synchronous speed is the speed at which the rotating magnetic field of the alternator rotates. If the alternator speed is significantly different from the synchronous speed, it can cause torque and mechanical stresses on the system.
Explanation of the Correct Answer:
The correct answer is option A - "Rating of the alternator must be the same as other alternators." This condition is not necessary for synchronization. The rating of the alternator refers to its power capacity or the amount of power it can generate. While it is important to consider the rating when connecting multiple alternators to the power system, it is not a direct condition for synchronization. Synchronization mainly focuses on the phase, frequency, voltage, and speed of the alternator.
Conclusion:
Synchronizing an alternator with a busbar requires meeting specific conditions related to phase, frequency, voltage, and speed. While the rating of the alternator is important for overall power system design, it is not directly related to the synchronization process.
Synchronizing an alternator with a busbar is an essential step in connecting the alternator to a power system. It ensures that the alternator operates in synchronization with the rest of the system, maintaining a stable and reliable power supply. There are certain conditions that need to be satisfied for successful synchronization.
Condition for Synchronization:
When synchronizing an alternator with a busbar, the following conditions must be satisfied:
1. Phase Synchronization:
The phase of the alternator must be identical to the phase of the busbar voltage. This means that both the alternator and the busbar must have the same phase angle at the time of synchronization. If there is a phase difference, it can cause severe circulating currents and damage to the alternator and the power system.
2. Frequency Synchronization:
The frequency of the alternator must be the same as the busbar voltage. The alternator must generate power at the same frequency as the power system to ensure a smooth transfer of power. If there is a frequency difference, it can lead to instability and fluctuations in the power system.
3. Voltage Synchronization:
The terminal voltage of the alternator must be the same as the busbar voltage. This ensures that the voltage levels are matched, and there are no voltage imbalances during synchronization. If there is a voltage difference, it can result in excessive reactive power flow and affect the stability of the system.
4. Speed Synchronization:
The speed of the alternator must be close to the synchronous speed. Synchronous speed is the speed at which the rotating magnetic field of the alternator rotates. If the alternator speed is significantly different from the synchronous speed, it can cause torque and mechanical stresses on the system.
Explanation of the Correct Answer:
The correct answer is option A - "Rating of the alternator must be the same as other alternators." This condition is not necessary for synchronization. The rating of the alternator refers to its power capacity or the amount of power it can generate. While it is important to consider the rating when connecting multiple alternators to the power system, it is not a direct condition for synchronization. Synchronization mainly focuses on the phase, frequency, voltage, and speed of the alternator.
Conclusion:
Synchronizing an alternator with a busbar requires meeting specific conditions related to phase, frequency, voltage, and speed. While the rating of the alternator is important for overall power system design, it is not directly related to the synchronization process.
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Which of the following is NOT a condition to be satisfied for the synchronisation of an alternator?a)Rating of the alternator must be the same as other alternatorsb)Phase of the alternator must be identical with the phase of busbar voltagec)Terminal voltage of the alternator must be same as busbar voltaged)Frequency of the alternator must be same as busbar voltageCorrect answer is option 'A'. Can you explain this answer?
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