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A4305 - C4305 - HVDC TRANSMISSION

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A4305 - C4305 - HVDC TRANSMISSION Powered By Docstoc
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                                                                                     NR/R09
               Code No: A4305, A4902, A6402, A5603/ C4305, C6402, C5603
                     JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
                         M.Tech I Semester Supplementary Examinations September 2010
                                           HVDC TRANSMISSION
                       (COMMON TO POWER ELECTRONICS, ELECTRICAL POWER
                 ENGINEERING, POWER ENGINEERING AND ENERGY SYSTEMS, POWER
                                        SYSTEMS (HIGH VOLTAGE))
               Time: 3hours                                              Max.Marks:60
                                           Answer any five questions
                                        All questions carry equal marks
                                                      ---

               1.a)   Explain the merits of connecting HVAC system by HVDC tie lines?
                 b)   Explain about the modern trends in HVDC system.

               2.     Derive the expression for magnitude of direct current for six-pulse bridge


               3.
                      converter having the overlay angle less than 600.


                                                                                  L D
                      Discuss about the design of a single tuned filter for elimination of harmonics in


               4.
                      HVDC.



                                                                  O R
                      Discuss about the actual control characterstics of the converter.

               5.

               6.                                 W
                      Explain the interaction between HVAC and HVDC systems?



                                                U
                      Explain about MTDC links and systems?

               7.
                                    T
                      Discuss about transient over voltages in HVDC systems?


                                  N
                             J
               8.     Explain the over current protections in HVDC systems?

                                                    *****




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