Code No: C4902
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
M.Tech I - Semester Supplementary Examinations, October 2010
(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.
Define overlap in HVDC converter and derive an expression for DC current
magnitude without overlap.
Explain about Voltage Dependent Current Order Limit (VDCOL) control.
Explain how reactive power requirement with increase in firing angle in a
Describe the working principle of a High Voltage DC circuit breaker.
Discuss the basic concepts of High Voltage DC circuit interruption.
What are the important characteristics of DC Circuit breaker?
What are the effects of proximity of AC and DC transmission lines?