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

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Subject Code: 180907

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

1. Attempt all questions.

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

1. (a) Discuss following methods in brief: (1) Automatic Generation Control (AGC), (ii) phase shifting transformers, (iii) excitation control and (iv) transformer tap changer control [07]
2. (b) Explain load compensation and system compensation with circuit and phasor diagram. [07]

1. (a) State the types of HVDC systems and explain each in brief. [07]

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2. (b) Compare technical performance of different SVCs. [07]

OR

1. (a) Determine per unit voltage at midpoint of a symmetrical line as a function of the power flow P on it. [07]
2. (b) Explain the working of TSC-TCR compensator with circuit & operating characteristic. [07]

1. (a) Explain single phase TCR. Derive the expression of the fundamental component of current flowing through TCR. [07]

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2. (b) Explain the characteristics of FC-TCR with and without coupling transformer. [07]

OR

1. (a) 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]
2. (b) Discuss inverter extinction angle control (EAG) in brief. [07]

1. (a) Explain constant B control and constant y control strategy. [07]

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2. (b) Discuss power reversal Characteristic of DC link and also Discuss Correction to inverter characteristics. [07]

OR

1. (a) Compare EHV AC with HVDC transmission with reference to Economics of Transmission, Technical performance. [07]
2. (b) Derive expressions for output DC voltage, PIV and PPR (peak to peak ripple) for a 12-pulse converter. [07]

1. (a) Explain 6-pulse inverter operation with overlap. Explain it with waveform only. [07]

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2. (b) Explain the components of VSC converter. [07]

OR

1. (a) Write a short note on 12-pulse bridge converters. [07]

Date: 17/05/2019
Total Marks: 70

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