University of Mumbai 2007-8th Sem B.E Electrical and Electronics Engineering HVDC Transmission Old - Question Paper
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Con. 2903-07. [OLD COURSE] //-oe % i6 ND-69
(3 Hours) [Total Marksj
N.B. (1) Question No.1 is compulsory.
(2) Attempt any four questions from the remaining 6lx questions.
(3) Assume suitable data if required.
(4) All main questions carry equal marks of 20; The marks for sub-questions are also equally distributed. (10)
I * Explain the various types of HVDC transmission systems. Discuss the advantages of using HVDC systems for transmission over HVAC.
2. Explain the three phase bridge type converter in detail complete with waveforms and figures.
3. Explain the characteristics of the controlling the converter. Discuss the power flow when control biasing is not proper.
4. a) Discuss the various protection systems used in the HVDC system.
b) Write the generation of harmonics in the HVDC systems and its mitigation.
5. Discuss the various types of commutation circuits used in the converter systems.
6. a) Discuss the ac/dc power flow.
b) Describe the firing control systems in HVDC systems.
7. Describe the various components of HVDC systems.
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