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Posted By: Sriram Member Level: Diamond Posted Date: 18 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech HVDC TRANSMISSION Question paper
Code No: NR410205 NR
IV B.Tech I Semester Supplementary Examinations, November 2006
HVDC TRANSMISSION
(Electrical & Electronic Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) What are the different applications of D.C. transmission system? Explain
them in detail. [8]
(b) With neat sketches explain the different kinds of D.C. links available. [8]
2. Obtain the ratings of valves and transformer of a Graetz’s circuit in HVDC transmission.
[16]
3. Explain the basic principles of DC link control characteristics. [16]
4. Explain in detail, the concept of reactive power requirement in HVDC converters.
[16]
5. Obtain the mathematical model of a d.c. network and d.c. converter, including
converter controller. [16]
6. (a) What are the basic principles of over current protection. [8]
(b) Discuss the various faults exist in converter station? Explain. [8]
7. What is the reason for using star-star and star-delta transformer configurations for
12 pulse converter. Derive an equation for primary current using fourier analysis.
[16]
8. What are the various types of filters that are employed in HVDC converter station?
Discuss them in detail. [16]
1 of 1
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