IV B.Tech I Semester Supplimentary Examinations, May/Jun 2009 HVDC TRANSMISSION (Electrical & Electronic Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Discuss the reasons for the choice of HVDC transmission over HVAC transmission system. [16]
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2. For a 3-φ, 6 pulse Graetz’s circuit, draw the timining diagram considering overlap angle less than 600 and without overlap for the following: [16] (a) Voltage across load
(b) Voltage across any two pair of conduction values
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3. Draw and explain a block diagram of the Hierarchical levels of controls of HVDC transmission system. [16] 4. Write detailed notes on the following:
[8+8]
(a) Power control of HVDC converters
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(b) Starting and Stopping of DC link.
5. (a) Compare simultaneous and sequential methods of power flow analysis. (b) Draw the flow chart for AC/DC load flow. 6. (a) What are the basic principles of over current protection. (b) Discuss the various faults exist in converter station? Explain.
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7. What do you understand by characteristic harmonics in HVDC System? Using fourier analysis obtain equation for primary current of transformers connected to 12 pulse converter. [16]
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8. Derive an equation for harmonic voltage and current for single tuned filter and discuss the influence of network admittance on design aspects. [16] ?????
NR410205 IV B.Tech I Semester Supplimentary Examinations, May ...
(a) Power control of HVDC converters · (b) Starting and ... (b) Draw the flow chart for AC/DC load flow. ... (b) Discuss the various faults exist in converter station?
(b) Back to back DC link along with AC feeder. 2. Clearly explain the different converter configurations commonly employed for HVDC · converter and bring out ...
1. Discuss in detail about the advantages of Robotics over other form of Automation ... Consider the three-link articulated robot of figure 5. Derive the forward ...
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3. (a) Compute Discrete Fourier transform of the following finite length sequence ... (a) Explain how the analysis of discrete time invariant system can be obtained.
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1. (a) Explain under what conditions can Fick's first law be used to solve diffusion · problem. (b) In a diffusion anneal, to what level should the initial temperature ...
(b) Describe various types of heat exchangers based on temperature ... (c) Explain the mechanism of heat transfer by radiation. [5+6+5] ... (a) Thermal diffusivity.
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[8+8] · 7. (a) How will you prepare Thiophene? What are its chief uses? [5+3] · (b) What will happen when Quinoline and Isoquinoline are treated with alkaline.
(a) Give an overview of C++ class structure? (b) Compare the ... What is the difference between the C++ standard library, and the C++ standard · template library ...
NR. II B.Tech I Semester Supplimentary Examinations, May/Jun 2009 ... (b) The electric vector E of an electromagnetic wave in free space is given by the.
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III B.Tech I Semester Supplimentary Examinations, May/Jun 2009 · PETROCHEMICAL ENGINEERING · (Chemical Engineering) · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal marks · ***** · 1. Explain Refining of Crude p
[4x4=16] · (a) Scrotum · (b) Sex glands · (c) Fallopian tubes · (d) Seminiferous tubules. 7. What are Lymph Nodes? Discuss about the spleen with a neat structure.
i. an Induction Motor of 40 HP, with 0.8 p.f. and efficiency 0.85 · ii. a synchronous motor of 25 HP, with 0.9 p.f. leading and efficiency 0.9 · iii. Lighting load of 10 ...
4. (a) Use Warshall's algorithm to find the transitive closure of the relation [10+6] · R = {(1,2)(1,3)(1,4)(2,3)(2,4)(3,4)} · (b) Are the simple graphs with the following ...
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chimney attached to the boiler? Explain how will you estimate its concentration · in this flue gas? 5. Describe the removal of sulphurdioxide by dry process using ...
Explain the Remote procedure call in detail. 3. Explain distributed Deadlock Detection and prevention methods. 4. Explain the following processor Allocation ...
