Flexible ac transmission systems FACTSs and voltage source converters, with smart dynamic controllers, are emerging as a stabilization and power filtering equipment to improve the power quality. Also, distributed FACTSs play an important role in impr
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R09
Code: 9A02702
B.Tech IV Year I Semester (R09) Supplementary Examinations, May 2013 FUNDAMENTAL OF HVDC & FACTS DEVICES (Electrical and Electronics Engineering) Time: 3 hours
Max Marks: 70 Answer any FIVE questions questions All questions carry carry equal marks marks ****
1.
(a) (b)
With neat sketches explain the different kinds of D.C links available. What are the demerits of of HVDC power transmission? transmission ?
2.
(a) (b)
Discuss about pulse frequency control scheme. With the help of a block block diagram explain explain the hierarchical hierarchical control structure structure for a D.C link.
3.
(a) (b)
What are the various types of filters that are are employed employed in in HVDC converter station? Discuss them in detail. What are the adverse affects of harmonics produced by the HVDC converters? converter s?
4.
(a) (b)
Explain the sequential method for AC-DC power flow. Draw the flow chart for AC/DC AC/DC load flow.
5.
(a) (b)
Explain power flow in parallel paths. What are the basic types of of FACTS controllers controller s explain each?
6.
(a) (b)
What are objectives of shunt compensation? compensation? Explain. Explain TCR and TSR
7.
8.
Explain the following: (a) TCSC (b) SSSC (a) (b)
Explain operating principle of UPFC. Explain control structure of UPFC.
