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WWW - Manaresults.Co - In: Answer Any FIVE Questions All Questions Carry Equal Marks

This document contains questions for an exam on high-voltage direct current (HVDC) transmission systems. It lists 8 questions, each with 2 parts, and instructs students to answer any 5 questions. The questions cover various topics related to HVDC systems including: types of HVDC links and their purpose; layout and components of typical HVDC transmission systems; rectifier and inverter operation; converter station components and converter transformer construction; firing angle schemes; harmonic voltage and current generation; DC power modulation; DC and AC circuit breakers; dominant harmonics in different converter types; multi-terminal HVDC system control; surge arrestor operation for overvoltage protection; over current protection principles; transient overvoltages due to DC disturbances;

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Manohar Potnuru
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75 views1 page

WWW - Manaresults.Co - In: Answer Any FIVE Questions All Questions Carry Equal Marks

This document contains questions for an exam on high-voltage direct current (HVDC) transmission systems. It lists 8 questions, each with 2 parts, and instructs students to answer any 5 questions. The questions cover various topics related to HVDC systems including: types of HVDC links and their purpose; layout and components of typical HVDC transmission systems; rectifier and inverter operation; converter station components and converter transformer construction; firing angle schemes; harmonic voltage and current generation; DC power modulation; DC and AC circuit breakers; dominant harmonics in different converter types; multi-terminal HVDC system control; surge arrestor operation for overvoltage protection; over current protection principles; transient overvoltages due to DC disturbances;

Uploaded by

Manohar Potnuru
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Code No: G5602/R13

M. Tech. I Semester Supplementary Examinations, January-2017


H.V.D.C. TRANSMISSION
(Common to HVE, HVPS, PS, PSC&A, EPE, EPS, PE, P&ID, PE&ED,
PE&D, EM&D, PE&PS and APS)
Time: 3 hours Max. Marks: 60
Answer any FIVE Questions
All Questions Carry Equal Marks

1. a Explain the types of HVDC links and its purpose with neat diagrams. 6M
b Draw the typical layout of HVDC transmission system and explain each part. 6M

2. Explain the individual characteristics of rectifier and inverter operation with neat 12 M
sketch.

3. a Draw the schematic diagram of a typical HVDC converter station with 2 six pulse 6M
converter units and explain the function of each component.
b Explain the constructional features of a converter transformer. 6M

4. a Explain in detail about equidistance firing angle scheme. Also list the draw backs of 6M
this scheme.
b What are the factors responsible for generation of harmonic voltage and current? 6M

5. a Explain the objective of DC power modulation in detail. 6M


b Discuss constructional difference of DC circuit breaker with AC circuit breaker. 6M

6. a Discuss the list of dominant harmonics present in the various types of HVDC 6M
converters.
b Discuss series-parallel multi-terminal HVDC system and its control. 6M

7. a Discuss the operation of surge arrestors for overvoltage protection of HVDC 6M


Systems.
b Explain the basic principles of over current protection. 6M

8. a Explain the nature of transient over voltages due to disturbances on DC side. 6M


b Write a short note on 6M
i. Over voltages on the HVDC system
ii. By-pass valve and its use.

*****

WWW.MANARESULTS.CO.IN
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