7/17/2019 UNIT I

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TAGORE ENGINEERING COLLEGERathanamangalam, Chennai-48

DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING

HIGH VOLTAGE DIRECT CURRENT TRANSMISSION

VIII SEM / IV YEAR

UNIT 1 QUESTION BANK

PART A

1.  State the reason for why DC power grid is not anticipated to replace the AC power grid? 

2.  What is the “Short Circuit Ratio”? What is it significance?

3.  Distinguish between AC and DC transmission Systems. 

4.  Mention any three applications of DC transmission systems. 

5.  What is the power ratings and transmission voltage of first DC link? In which year was this

scheme commissioned? 

6.  Draw the electrical equivalent of controlled light triggered Thyristor turn on. 

PART B

1.  With neat schematic diagrams discuss the DC transmission system in detail. (16) 

2.  Discuss the modern trends in DC transmission. Also describe the steps involved in planning

the HVDC transmission system? (16) 

3. 

What are the advantages and disadvantages of HVDC transmission? (10) 4.  Describe how the choice of voltage level plays a role in minimizing the total cost of long

distance bulk power transmission. (6) 

5.  State and explain the classification of HVC links. (8) 

6.  With neat sketch, explain the function of the main components associated with an HVDC

system. (8) 

7.  Give the comparison of AC and DC transmission based on economics of transmission and

reliability (8) 

8.  With neat diagram, explain the types of HVDC links. (8) 

9.  Mention the various components of a HVDC converter station and state the applications of

HVDC converters (8) 10. Explain the various considerations to be taken in to account in the planning for HVDC

transmission. (8)