Question

The steady state stability limit of a power system can be increased by

• A. Decreasing the excitation of a generator
• B. Increasing the reactance
• C. Reducing the reactance
• D. Using shunt reactors

Hint:

Lower reactance in transmission lines enhances steady-state stability.

Answer 1

The Correct Option is C

The steady state stability limit is directly related to power transfer capability. By reducing the reactance \( X \) of the system, the maximum power transfer increases: \[ P_{\text{max}} = \frac{EV}{X} \sin\delta \] Thus, reducing \( X \) improves the stability margin.