Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2170906 Advanced Power Electronics Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2170906 Date:19/01/2021
Subject Name:Advanced Power Electronics
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
(a) Give comparison between continuous conduction node and discontinuous 03
conduction mode.
(b) Draw only the circuit diagram of flyback, forward, half bridge and full 04
bridge converter.
(c) Derive output equation for the buck-boost converter with necessary 07
waveform.
Q.2
(a) Explain the use of transformer in switch mode power supplies.
03
(b) Classify the resonant converter.
04
(c) Explain the operation of two transistor forward converter with circuit 07
diagram, waveform and required equation.
Q.3
(a) Why resonant converter is needed?
03
(b) What are the advantages of cascaded H bridge multi-level inverter over 04
other two topologies?
(c) Explain the operation of zero voltage switching resonant converter with 07
circuit diagram, waveform and required equation.
Q.4
(a) Why multi pulse converter is better than conventional converter?
03
(b) Give comparison between ZVS and ZCS.
04
(c) Draw the circuit diagram of 5 level diode clamped multi level inverter and 07
explain the operation with switching table.
Q.5
(a) Give technical comparison between buck converter and boost converter.
03
(b) Explain the working of Fixed Capacitor Thyristor-Controlled Reactor (FC- 04
TCR). Draw neat diagrams.
(c) Draw the circuit diagram of 5 level cascaded H-bridge multi-level inverter 07
and explain the operation with switching table.
Q.6
(a) Compare SVC and STATCOM.
03
(b) Draw block diagram of HVDC transmission system. Mention equipment 04
required for HVDC system.
(c) Explain the operation of six pulse diode rectifier with resistive load with 07
necessary diagram and waveform.
Q.7
(a) Give classification and applications of phase shifting transformer.
03
(b) What is series compensation? Discuss working of Thyristor controlled 04
series capacitor (TCSC).
(c) Explain operating principle of Unified power flow controller (UPFC).
07
1
Q.8
(a) Explain different types of HVDC link.
03
(b) State advantages and limitation of SSSC.
04
(c) Explain in brief about FACTS.
07
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This post was last modified on 04 March 2021