Power System Transients

How can we check upon the transient stability of a power system?

• By checking variation in load angle

• By checking variation of real power with load angle

• Checking variation in load angle and real power

• Checking variation in load angle or real power

How can we improve the steady state stability of the synchronous generator for a better performance?

• Increasing the excitation

• Increasing reactance

• Decreasing moment of inertia

• Increasing moment of inertia

The measure to improve the transient stability of the power system during the unbalanced or unsymmetrical fault can be taken as ________

• Single pole switching of CB

• Excitation control

• Phase shifting transformer

• Increasing turbine valve opening

Use of high speed circuit breaker will actually increase the system stability.

• False

• True

What does the steady state stability of a power system signify?

• Maintaining the rated voltage

• Maintaining rated frequency

• Maintaining a synchronism between machines and tie-lines

• All of the mentioned

Which one of the following device is used for improving the power factor of the system:

• Synchronous Phase Modifier

• Shunt Reactor

• Series Reactor

• Asynchronous Generator

Filters are used to reduce which of the following:

• Voltage distortion

• Voltage sag

• Harmonics

• All the options are correct

Which of the following contribute to the low voltage and poor power factor:

• Reactive Power

• Load imbalance

• Harmonics

• All the options are correct

Most of the power quality problems are related to grounding and neutral size issues

• True

• False

Total Harmonic Distortion (THD) is defined as the ratio of the Actual Fundamental to RMS harmonic content:

• True

• False