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www.jntuworld.com NR Code No: A4902 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD M.Tech I Semester Examinations, October/November-2011 HVDC TRANSMISSION (ELECTRICAL POWER ENGINEERING) Time: 3hours Max. Marks: 60 Answer any five questions All questions carry equal marks --- 1. a. Compare EHVAC and HVDC transmission b. Explain the advantages and disadvantages of HVDC Transmission.  2. a. Explain the analysis of Graetz circuit without overlap. b. Explain the Characteristics of twelve pulse converter.  D 3. Draw the schematic diagram of a typical HVDC Converter station and explain its major components. L  4. a. Explain the various types of DC and AC filters. b. Explain the converter bridge characteristics. 5. Explain the following. a. Individual phase control O R  b. Equidistant pulse control c. Equidistant Firing angle. U W 6. Explain the various types of MTDC Systems.   N T 7. a. Explain the Converter faults. J b. Explain the protection against over currents.  8. a. Explain the over voltages in a converter station. b. Write short notes on surge arresters.  ****** www.jntuworld.com
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