Podcast
Questions and Answers
What is the consequence of loss of synchronism in a power system?
What is the consequence of loss of synchronism in a power system?
- Increased power transfer between machines
- No net power transfer between machines (correct)
- Improved stability of the system
- Reduced mechanical torque on the generators
What is required for interconnected generators to remain in synchronism?
What is required for interconnected generators to remain in synchronism?
- Exact same rotor speeds (correct)
- Fluctuating voltage angles
- Varying voltage magnitudes
- Different rotor speeds
When is a power system transiently unstable?
When is a power system transiently unstable?
- When all generators are operating at maximum capacity
- Following a disturbance where generators lose synchronism (correct)
- During normal operation
- During the steady-state condition
What does the classical generator model treat the generator as?
What does the classical generator model treat the generator as?
What does the mechanical input torque (Tm) depend on in a generator's mechanical model?
What does the mechanical input torque (Tm) depend on in a generator's mechanical model?
What is the consequence of loss of synchronism in a power system?
What is the consequence of loss of synchronism in a power system?
What is the mechanical input torque (Tm) dependent on in a generator's mechanical model?
What is the mechanical input torque (Tm) dependent on in a generator's mechanical model?
Which model treats the generator as a voltage source behind the direct-axis transient reactance with fixed voltage magnitude and changing angle according to mechanical dynamics?
Which model treats the generator as a voltage source behind the direct-axis transient reactance with fixed voltage magnitude and changing angle according to mechanical dynamics?
When is a power system said to be transiently unstable?
When is a power system said to be transiently unstable?
What does ac stability consider in an ac grid with one ac generator and one load?
What does ac stability consider in an ac grid with one ac generator and one load?
Flashcards
Loss of Synchronism Consequence
Loss of Synchronism Consequence
Generators are no longer synchronized, resulting in no net power transfer between machines.
Synchronism Requirement
Synchronism Requirement
Generators must maintain the exact same rotor speeds to stay in synchronism.
Transient Instability
Transient Instability
A power system is transiently unstable when generators lose synchronism after a disturbance.
Classical Generator Model
Classical Generator Model
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Torque Dependence
Torque Dependence
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Generator Model
Generator Model
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AC Stability
AC Stability
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