Transient stability of the generator is dependent on (a) generator reactance; lower reactance decreases peak power and increases initial rotor angle. (b) how heavily the generator is loaded. (c) generator inertia; higher the inertia, slower the rate of the change of angle. (d) generator output during fault Which of the above is incorrect?
Transient stability of the generator is dependent on (a) generator reactance; lower reactance decreases peak power and increases initial rotor angle. (b) how heavily the generator is loaded. (c) generator inertia; higher the inertia, slower the rate of the change of angle. (d) generator output during fault Which of the above is incorrect? Correct Answer a
Transient stability:
- The ability of a synchronous power system to return to a stable condition and maintain its synchronism after a large disturbance is called Transient stability.
- The large disturbance may be switching ON and OFF of circuit elements, or clearing of faults, etc.
- Transient stability in the power system is done over a minimum period equal to the time required for one swing.
- If the system is found to be stable during this first swing, its assumed that the disturbance will reduce in the subsequent swings, and the system will be stable.
- The transient stability of the power system is determined by using the swing equation.
It is dependent on
- how heavily the generator is loaded.
- generator inertia; higher the inertia, slower the rate of the change of angle.
- generator output during fault
The methods normally used to increase the transient stability are
- Higher system voltage
- Use of parallel lines to reduce the series reactance
- Use of high-speed circuit breakers and auto-reclosing breakers
- Fast excitation system
- High speed governors
- Single pole circuit breakers
- Dynamic resistance switching
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Feb 20, 2025