Download JNTU (NR) M.TECH 2-Semester ADVANCED POWER SYSTEM PROTECTION March–2009 Exam Question Paper | Indian Shout

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Download JNTU (NR) M.TECH 2-Semester ADVANCED POWER SYSTEM PROTECTION March–2009 Exam Question Paper

Code No. B0702
JAWAHARLAL NEHRU TECHNOLOGY UNIVERSITY, HYDERABAD
M .Tech. II Semester Supplementary Examinations, March – 2009
ADVANCED POWER SYSTEM PROTECTION
(Common to Electrical Power Systems, Electrical Power Engineering
and Power Engineering & Energy Systems)
Time: 3 hours        Max. Marks.60
Answer any Five questions
All questions carry equal marks

1.  What is the role of instrument transformers in power system protection? Explain.

2.  With neat circuit diagram explain the principle of operation of inverse definite
time static over current relay.

3.a)  Explain the duality between comparators.
b)  Explain  the  procedure  of  realizing  characteristics of mho relay using static
comparator.

4.a]  What is the effect of arc resistance on the performance of distance relays? Which
relay is least effected.
b]  How elliptical relay characteristics are realized using static circuits?

5.a]  Explain phase fault compensation for current distance measurement.
b]  Explain how measuring units are reduced using Delta – Why switching scheme.

6.  Draw practical scheme based on circulating current principle for wire pilot
protection and explain its operation.

7.  Explain differential equation technique, digital relaying algorithm.

8.  Draw the block diagram of microprocessor based offset mho relay, Explain its
operation with help of block diagram.

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