Docstoc

HVDC TRANSMISSION

Document Sample
HVDC TRANSMISSION Powered By Docstoc
					www.jntuworld.com




               Code No: C4902
                                                                                            R09
                 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
                       M.Tech I - Semester Supplementary Examinations, October 2010
                                          HVDC TRANSMISSION
                                  (ELECTRICAL POWER ENGINEERING)
                 Time: 3hours                                              Max.Marks:60
                                         Answer any five questions
                                      All questions carry equal marks
                                                     ---

               1.     Discuss the advantages of HVDC transmission. Under what circumstances
                      HVDC transmission is preferred?

               2.a)   Discuss the principles of HVDC transmission with the help of a block diagram.
                 b)   Briefly explain about various types of HVDC links, terminal equipments and
                      components of HVDC transmission system.

               3.

                                                                               L D
                      Define overlap in HVDC converter and derive an expression for DC current
                      magnitude without overlap.

               4.

               5.
                                                                    R
                      Explain about Voltage Dependent Current Order Limit (VDCOL) control.


                                                                  O
                      Explain how reactive power requirement with increase in firing angle in a


               6.
                      converter.



                                               U W
                      Describe the working principle of a High Voltage DC circuit breaker.

               7.a)
                 b)
                                    T
                      Discuss the basic concepts of High Voltage DC circuit interruption.


                                  N
                      What are the important characteristics of DC Circuit breaker?

               8.
                             J
                      What are the effects of proximity of AC and DC transmission lines?


                                                      ---o0o---




                                                www.jntuworld.com

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:5/28/2013
language:Unknown
pages:1