1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-IV EXAMINATION WINTER 2018
Subject Code:X40903 Date: 28/11/2018
Subject Name: Power System Analysis and Simulation
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain construction of synchronous machine
07

Obtain the expression of power in a three phase system in terms of symmetrical components
07
Q.2

State and explain the advantages of per unit system used for a power system
07

Derive expression of ABCD parameters for medium transmission line using T
method.
07
OR

Explain reactive compensation of transmission line
07
Q.3

Draw the waveform for fault current for a 3-phase fault on alternator terminals. Explain the sub-transient, transient and steady state reactance
07

Explain bus impedance matrix method
07
OR
Q.3

Write a short note on the selection of circuit breaker
07

Mention the steps to find the fault current with LLG fault in a power system
07
Q.4

What are the various methods of neutral grounding? Explain Resonant grounding
07

Explain critical disruptive voltage and radio interference due to corona
07
OR
Q.4

What do you mean by corona. Derive the equation of corona loss in power
transmission line
07

Write a brief note on capacitance switching.
07
Q.5

Explain travelling waves of a transmission line
07

Explain the zero sequence impedance of transformer for various connections
07
OR
Q.5

Discuss the factors affecting the corona loss
07

Explain resistance grounding
07