This document discusses questions pertaining to small signal stability analysis of a single machine connected to an infinite bus system. Some of the key topics covered include defining power system stability, classifying stability studies, explaining the swing equation terms, assumptions made in stability studies, defining an infinite bus, control schemes for stability, and factors that affect stability.

1. SMALL SIGNAL STABILITY ANALYSIS:
SINGLE - MACHINE INFINITE BUS SYSTEM
Viva Questions
1. Define power system stability.
2. What are the methods of maintaining stability?
3. How stability studies are classified, what are they?
4. What is steady state stability limit?
5. Define steady state stability.
6. What is stability study?
7. Given an expression for swing equation. Explain each term along with their
units.
8. What are the assumptions that are made in order to simplify the
computational task in stability studies?
9. How is the machine connected to infinite bus?
10. What is meant by an infinite bus?
11. Give the control schemes included in the stability control techniques.
12. What are various faults that increase severity of equal area criterion?
13. State the applications of the equal area criterion.
14. What are the essential factors affecting the stability?
15. Define Inertia constant (H) & Movement of inertia (M).
16. What are the machine problems seen in the stability study?
17. What is small disturbance? Give some example.
18. How to you classify steady state stability limit. Define them.
19. When is a power system said to be steady state stable?
20. What are the system design strategies aimed at lowering system reactance?