Rajasthan Technical University 2009-8th Sem B.E : Electrical Engineering (B.Tech- ) EHV AC/DC Transmission - Question Paper
Rajasthan tech. University kota
Electrical Engineering (B.Tech. - semester 8)
EHV AC/DC Transmission
Paper I
8201
IV B.E. (VIII SEMESTER) (MAIN/BACK) EXAMINATION, 20W
(New Four Year Semester Scheme)
{Branch: Electrical Engineering]
Paper I
: Time Allowed : Three Hours Maximum Marks 80
(1) No supplementary answer-book will be given to any candidate. Hence the candidates should write the an;werprecisely in the Main answer-book only.
(2) All the parts of one question should be answered at one place in the answer-book One complete question should not be answered at different places in the answer-book.
A tlempt any five questions.
AH questions carry equal marks.
1. (a) What do you understand by hollow, ACSR and
bundle conductor? Explain in detail the reasons for adoption of bundle conductors in EHV lines. 8
(b) Derive the necessary relationship to show that the bulk power transmission over long distances is economical at EHV. 8
2. (a) Discuss the flat frequency control method foi
load frequency control in power systems. Why is it necessary to use very sensitive frequency controller in this type of control? 8
(b) What is the need of load frequency control in power system? How is the load frequency "control achieved? 8
3. (a) Describe various types of thyristorised static VAR
compensation with their merits and demerits. S
(b) Define the methods of voltage control. 8
4. (a) Discuss the tie line bias control method of load
frequency control in power system.
(b) Explain corona losses in EHV lines under bad weather conditions and its estimation. 8
5. (a) Describe the automatic generation control with
block diagram. 8
(b) For reactive power control in power system, describe a thyristor controlled reactor and fixed capacitor scheme with the help of circuit and control characteristics diagram. . 8
6. (a) Briefly explain the FACTS controller. 8
(b) Describe the effects of electrostatic fields of EHV lines. 8
7. (a) Describe the various equipments used in a
convertor station of HVDC system. 8
(b) Describe the HVDC link and convertor control characteristics. 8
8. Write short notes on any two:
(/) MTDC system
(ii) HVDC circuit breaker
(iii) Series compensation of transmission lines. 8 + 8
:,3oo
8201
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| Earning: Approval pending. |
