Download GTU B.Tech 2020 Winter 7th Sem 2170906 Advanced Power Electronics Question Paper

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Enrolment No.

Subject Code: 2170906

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE- SEMESTER-VII (NEW) EXAMINATION — WINTER 2020

Subject Name: Advanced Power Electronics

Time: 10:30 AM TO 12:30 PM

Instructions:

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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

1. Give comparison between continuous conduction mode and discontinuous conduction mode. (03)

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2. Draw only the circuit diagram of flyback, forward, half bridge and full bridge converter. (04)
3. Derive output equation for the buck-boost converter with necessary waveform. (07)

Q.2

1. Explain the use of transformer in switch mode power supplies. (03)
2. Classify the resonant converter. (04)

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3. Explain the operation of two transistor forward converter with circuit diagram, waveform and required equation. (07)

Q.3

1. Why resonant converter is needed? (03)
2. What are the advantages of cascaded H bridge multi-level inverter over other two topologies? (04)
3. Explain the operation of zero voltage switching resonant converter with circuit diagram, waveform and required equation. (07)

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Q.4

1. Why multi pulse converter is better than conventional converter? (03)
2. Give comparison between ZVS and ZCS. (04)
3. Draw the circuit diagram of 5 level diode clamped multi level inverter and explain the operation with switching table. (07)

Q.5

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1. Give technical comparison between buck converter and boost converter. (03)
2. Explain the working of Fixed Capacitor Thyristor-Controlled Reactor (FC-TCR). Draw neat diagrams. (04)
3. Draw the circuit diagram of 5 level cascaded H-bridge multi-level inverter and explain the operation with switching table. (07)

Q.6

1. Compare SVC and STATCOM. (03)

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2. Draw block diagram of HVDC transmission system. Mention equipment required for HVDC system. (04)
3. Explain the operation of six pulse diode rectifier with resistive load with necessary diagram and waveform. (07)

Q.7

1. Give classification and applications of phase shifting transformer. (03)
2. What is series compensation? Discuss working of Thyristor controlled series capacitor (TCSC). (04)

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3. Explain operating principle of Unified power flow controller (UPFC). (07)

Q.8

1. Explain different types of HVDC link. (03)
2. State advantages and limitation of SSSC. (04)
3. Explain in brief about FACTS. (07)

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Date: 19/01/2021

Total Marks: 56

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