Anna University Chennai 2007 M.E Power Electronics & Drives PS 1623 A - FLEXIBLE AC TRANSMISSION SYSTEMS - Question Paper

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M.E. DEGREE EXAMINATION, MAY/JUNE 2007.
Elective
Power Systems Engineering / Power Electronics and Drives / High Voltage Engineering
PS 1623 A - FLEXIBLE AC TRANSMISSION SYSTEMS
(Regulation 2005)
Time: 3 hours
Maximum: 100 marks

ans ALL ques..
PART A - (10 x two = 20 marks)

1. What is the necessity of compensation?
2. How is reactive power controlled in the electrical network?
3. Write the applications of SVC.
4. How is voltage instability identified in the power system?
5. What are the various kinds of modelling methods of FACTS devices?
6. How is system stability limit improved?
7. What are the advantages of FACTS controllers?
8. What is the role of de link in UPFC?
9. How is co-ordination of FACTS controllers carried out?
10. Write the significance of modulation index.



PART B - (5 x 16 = 80 marks)
11. (a) (i) discuss the objectives of FACTS controllers in the power system network. (8)

(ii) define the procedure to locate the FACTS devices in an electrical network. (8)

Or

(b) With a neat schematic diagram, discuss the different basic kinds of FACTS controllers in detail. (16.)

12. (a) (i) discuss about the performance of SVC in controlling voltage in a power system. (8)

(ii) elaborate the advantages of slope in the dynamic characteristics of SVC? (8)

Or

(b) Briefly define the way by which the transient stability is enhanced due to static var compensator.(16)

13. (a) With a neat block diagram, discuss the various modes of operation of TCSC. (16)

Or

(b) Enumerate the modelling ofTCSC to enhance the system stability. (16)

14. (a) (i) discuss the operation of STAT COM with an aid of block diagram.(8)

(ii) define the V-I characteristics of STATCOM. (8)

Or

(b) (i) discuss the modelling procedure ofUPFC for power flow studies. (10)

(ii) elaborate the different latest advancement in the UPFC design? (6)


15. (a) discuss the different control attributes for various FACTS controllers. (16)

Or

(b) define in detail the power flow control co-ordination of FACTS .. controllers using genetic algorithms.(16)

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Earning:   Approval pending.