Steady state stability of a power system is improved by

Electrical Engineering XYZ MCQs

Steady state stability of a power system is improved by:

1. Using double circuit line instead of single circuit line
2. Decreasing generator inertia
3. Single pole switching
4. All of the above

Correct answer: 1. Using double circuit line instead of single circuit line

Explanation:

1. Using double circuit line instead of single circuit line: This is correct. Steady state stability of a power system can be improved by using a double circuit line instead of a single circuit line. Double circuit lines provide better redundancy and reliability, which can enhance the overall stability of the power system.
2. Decreasing generator inertia: This is incorrect. Steady state stability is generally improved by increasing generator inertia. Higher inertia provides more kinetic energy storage in the rotating masses of the generators, which helps the system to withstand disturbances and maintain stability.
3. Single pole switching: This is incorrect. Single pole switching can introduce transients and disturbances in the power system, which can have a negative impact on steady state stability. It is usually recommended to perform switching operations involving multiple poles to minimize disruptions.

So, the correct answer is “Using double circuit line instead of single circuit line.”