Download GTU BE/B.Tech 2018 Winter 8th Sem Old 180907 Advanced Power Electronics Ii Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (OLD) EXAMINATION — WINTER 2018

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Subject Code: 180907 Date: 29/11/2018
Subject Name: Advanced Power Electronics -11
Time: 02:30 PM TO 05:00 PM Total Marks: 70

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 (a) State the types of HVDC system and explain each in brief 07
(b) Discuss the merits of HVDC transmission line over HVAC transmission line. 07

Q.2 (a) Explain the 3-@ six pulse controlled converter with necessary waveforms and derivation. 07

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(b) Explain the equivalent circuit diagram of HVDC system with derivation. 07
OR
(b) Explain the operation of HVDC-VSC. 07

Q.3 (a) Explain the effect of source impedance on the working of six pulse controlled converter with necessary waveforms and derivation. 07
(b) Explain Inverter Extinction Angle control. 07

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OR
Q.3 (a) Explain the necessity of compounding both converter & inverter stations with constant current control. 07
(b) Discuss power reversal characteristic of HVDC link. 07

Q.4 (a) Discuss the advantages of FACTS in brief. 07
(b) Explain working of TCR with static characteristics. 07

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OR
Q.4 (a) Compare the technical performance of Different SVC’s 07
(b) Explain midpoint compensation with necessary derivation. 07

Q.5 (a) Explain mechanical switched capacitor thyristor controlled reactor. 07
(b) Explain thyristor controlled transformer compensator. 07

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OR
Q.5 (a) Explain the working of synchronous condenser. 07
(b) Explain the working of UPFC. 07