Download GTU BE/B.Tech 2019 Summer 7th Sem New 2170906 Advanced Power Electronics Question Paper

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Subject Code: 2170906

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019

Subject Name: Advanced Power Electronics

Time: 02:30 PM TO 05:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. (a) Compare switching voltage regulator with linear voltage regulator. 03
2. (b) Explain half bridge converter. 04

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3. (c) Discuss operation of Buck converter in continuous and discontinuous mode. 07

Q.2

1. (a) Explain boost switching regulators. 03
2. (b) Explain fly back converter. 04
3. (c) Discuss operation of Push pull converter type switched mode dc power supply along with necessary waveforms. 07

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OR

1. (a) Explain zero current switching resonant converters. 07
2. (b) Explain different types of HVDC link. 03
3. (c) Give comparison of HVAC and HVDC transmission. 04

Q.3

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1. (a) Discuss the equipments required for HVDC systems. 07

OR

1. (a) What is the need of resonant converter? Give Classification of resonant converters 03
2. (b) Give comparison between ZCS and ZVS. 04
3. (c) Explain zero voltage switching resonant converter. 07

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Q.4

1. (a) What is the importance of reactive power compensation? 03
2. (b) Give comparison of SVC and STATCOM. 04
3. (c) Explain the working principle of FC-TCR. 07

OR

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1. (a) State the advantages of FACTS devices. 03
2. (b) State advantages and limitation of SSSC. 04
3. (c) Explain the working principle of TSC-TCR. 07

Q.5

1. (a) What is the difference between isolated and non-isolated dc power supply. 03

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2. (b) Discuss the principle of series compensation and state various methods for series compensation. 04
3. (c) Explain operating principal of STATCOM. 07

OR

1. (a) What is the application of Multipulse Converters? 03
2. (b) Explain operation of diode clamped multilevel inverter. 04

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3. (c) Draw the transformer connections for 18 pulse converter. Explain Y-Z2 transformer connection used for multipulse converter. 07

Total Marks: 70

Date: 10/05/2019