Download GTU BE/B.Tech 2019 Summer 8th Sem Old 180907 Advanced Power Electronics Ii Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem Old 180907 Advanced Power Electronics Ii Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 180907 Date: 17/05/2019

Subject Name:Advanced Power Electronics -II

Time: 10:30 AM TO 01:00 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) Discuss following methods in brief:
(i)Automatic Generation Control (AGC), (ii) phase shifting transformers, (iii)
excitation control and (iv) transformer tap changer control
07
(b)
Explain load compensation and system compensation with circuit and phasor diagram.
07

Q.2 (a) State the types of HVDC systems and explain each in brief. 07
(b) Compare technical performance of different SVCs. 07
OR
(b) Determine per unit voltage at midpoint of a symmetrical line as a function of the
power flow P on it.
07

Q.3 (a) Explain the working of TSC-TCR compensator with circuit & operating
characteristic.
07
(b) Explain single phase TCR. Derive the expression of the fundamental component
of current flowing through TCR.
07
OR
Q.3 (a) Explain the characteristics of FC-TCR with and without coupling transformer. 07
(b) Write a short note on effect on Power transfer capacity using shunt compensation
and also derive expression for incremental VAR rating of a series capacitor.
07

Q.4 (a) Discuss inverter extinction angle control (EAG) in brief. 07
(b) Explain constant ? control and constant ? control strategy. 07
OR
Q.4 (a) Discuss power reversal Characteristic of DC link and also Discuss Correction to
inverter characteristics.
07
(b) Compare EHV AC with HVDC transmission with reference to Economics of
Transmission, Technical performance.
07

Q.5 (a) Derive expressions for output DC voltage, PIV and PPR (peak to peak ripple) for
a 12-pulse converter.
07
(b)
Explain 6-pulse inverter operation with overlap. Explain it with waveform only.
07
OR

Q.5 (a) Explain the components of VSC converter. 07
(b) Write a short note on 12-pulse bridge converters. 07

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