Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 4th Sem New 2142404 Basic Power Systems Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code:2142404 Date:22/11/2018
Subject Name:Basic Power Systems
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 (a) What is a power generating station? 03
(b) List the advantages and disadvantages of Thermal power station. 04
(c) Draw schematic arrangement of nuclear power plant and list out its main components 07
Q.2 (a) Discuss disadvantage of low power factor. 03
(b) What is the use of power factor? Why do we need to improve it? 04
(c) Discuss the advantages and disadvantages of (i) pin-type insulator (ii) suspension
type insulators.
07
OR
(c) Explain the Nominal ? method used for the solution of medium transmission line. 07
Q.3 (a) Explain proximity effect in ac supply system. 03
(b) What do you understand by skin effect? Why it is absent in DC system? 04
(c) Derive the equation of an inductance of a conductor and loop inductance for single-
phase two wire line.
07
OR
Q.3 (a) What do you understand by long transmission line? 03
(b) What is Corona effect? Which factor affecting its? 04
(c) List the methods for solution of medium transmission lines. Explain nominal T
method.
07
Q.4 (a) Enlist various methods to improving string efficiency. 03
(b) Explain types of DC links in brief. 04
(c)
What is transposition? Discuss the importance of transposition in transmission line.
07
OR
Q.4 (a) Explain voltage transformer earthing. 03
(b) What are the merits of HVDC transmission? 04
(c) Enlist the basic equipment used in HVDC transmission. Explain the operation of
Converters in HVDC transmission system.
07
Q.5 (a) Draw the Bus-bar arrangements in sub-station. 03
(b) Define the grounding and explain solid grounding with diagram. 04
(c) Explain the bundled conductors in EHV transmission lines with its merits. 07
OR
Q.5 (a) Explain the Ferranti effect with necessary diagram 03
(b) Enlist the five equipment along with its symbols used in Sub-stations. 04
(c) Give the Classification of Sub-station. Explain comparison between indoor and
outdoor substation.
07
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This post was last modified on 20 February 2020