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MANAKULA VINAYAGAR INSTITUTE OF TECHNOLOGY
EEE- POWER SYSTEM ANALYSIS- UNIVERSITY FAQ’s
2Marks:
Unit-4
1. What is the need of performing short circuit analysis in power system? Nov-15
2. How is an unsymmetrical fault different from symmetrical fault? Nov-15
3. Mention the objectives of short circuit studies
4. What is the significance of transient reactance in short circuit studies? April 15
5. Name any two methods of reducing short circuit current. Nov 14
6. Draw the connection of sequence networks for a L-L fault at the terminals of an unloaded
generator. Nov-14
7. Write the various types of series and shunt faults occurs in a power system? April-14
8. What is the significance of subtansient reactance in short circuit studies? April-14
9. How are faults classified?
10. How is line to line fault represented by sequential network? Nov 13
11. Define short circuit capacity and fault level.
12. What is bolted fault? Apr 13
13. List out the different types of unsymmetrical fault
14. Define short circuit capacity. Apr-13
Unit-5
1. Define critical clearing angle-nov15
2. Define voltage stability margin-nov15
3. Define Dynamic stability of a power system April 15
4. What are limitations of equal area criterion? April 15
5. In a 3 machine system having ratings G1, G2 and G3 and inertia constants M1, M2 and M3. What
is the inertia constant M and H of the equivalent system? Nov15
6. Define stability
7. What is meant by torque angle? April-14
8. What are the methods available to improve the transient stability limit of a power system?
April14
9. What are the factors influencing transient stability?
10. What are voltage sags? What are their causes? Nov13
11. Draw the capability curve of synchronous machine with hydrogen cooling.
12. What is meant by voltage stability margin? Apr13
13. Write the power angle equation of a two machine system. Apr13
11Marks:
Unit-4:
1. Derive the relationship for fault currents in terms of symmetrical components
when there is a double line to ground fault (or) Draw the sequence network
connection for DL-G fault at any point in power system. From that obtain an
expression for the fault current. Apr-14, 13, 12/Nov-14
2. Draw the sequence network connection for LG fault at any point in power
system. From that obtain an expression for the fault current. Nov-13
Unit-5:
1. Derive the swing equation of a synchronous machine swinging against an
infinite bus. Clearly state the assumption made in deducing the swing
equation. Apr-15, 13/Nov-15, 12
2. Describe the equal area criterion for transient stability analysis of a system.
Apr-15, 14/Nov-14.
3. Derive critical clearing angle and critical clearing time. Nov-12

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