Question

The stability of a system, when subjected to a disturbance, is assessable by which of the following methods?

1. Swing curve

2. Equal-area criterion

3. Power-angle diagram

4. Power-circle diagram

1. 1, 2 and 4 only
2. 1, 3 and 4 only
3. 2, 3 and 4 only
4. 1, 2 and 3 only

Answer 1

Correct Answer - Option 4 : 1, 2 and 3 only

The stability of a system when subjected to a disturbance can be estimated by using the solution of

1. Swing curve
2. Equal area criterion
3. Power angle diagram

On the other hand, a power circle diagram is used to find the rating of compensator but it won’t assess the stability of the system.

Hence statements 1, 2, 3 are correct and statements-4 is false