PART-A
1. Define per unit value of an electrical quantity and write the equation for base impedance for a three phase power system.(MAY/JUNE ’16)
2. Write the equation for per unit impedance if change of base occurs. (MAY/JUNE ’16)
3. Draw the impedance diagram for the given single line representation of the power system. (MAY/JUNE ’14)
4. What are the types of load modeling? (MAY/JUNE ’14)
5. What are the functions of modern power system? (NOV/DEC ’13)
6. Name the diagonal and off-diagonal elements of bus impedance matrix. (NOV/DEC ’13)
7. What is meant by percentage reactance? (MAY/JUNE’13)
8. Draw the equivalent circuit of a 3 winding transformer. (MAY/JUNE ’13)(NOV/DEC ’12)
9. What are the components of power system? (MAY/JUNE’12)
10. If the reactance in ohms is 15 Q, find the p.u. value for a base of 15 kVA and 10 kV. (MAY/JUNE’12)
11. What do you mean by transient and steady state condition? (NOV/DEC ’12)
12. What is a single line diagram? (NOV/DEC ’11)
13. How are the loads represented in reactance of impedance diagram? (NOV/DEC ’11)
14. Draw a simple per-phase model for a cylindrical rotor synchronous machine. (APRIL/MAY’11)
15. What are the advantages of per unit system? (APRIL/MAY’11 )