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RollNo. Totai No of Pages: tr8E4109

B. Tech. VIII Senn. (Main/Baek) Exam.o April, Z}lsElectrical Engineering

8EE1 EFIV ACiDC TransmissionComermom for SEEtr & BEX1

Time: 3 Hours Maximum Marks: 80

N{in. Passing Marks: 24Instructions to Candidates :

Attempt any five questions, selectirtg ane question from each unit. All questions,lrry equal yarks. Schematic eliagrams must be shown wherever necessat)). Anydata you.feel missing suitably be assumecr and stated clearfit.

units of quantities usedlcalculated nrust be stated clearLy.

Use of following supporting material is permitted during examination.

I. NIL 2.NIL

UNIT:J

Q.l (a) Describe the relative rnerirs of AC & DC

need of EHV transmission?

AE

Q.1 (a) Explain the properties of the bundled conductors"

lines effects human, anirnals and plants"

(b) Define & Explain:

(i) Geometric mean radios of bundle.

(ii) Corona effects.

modes of transmission. What is

FIow electrostatic field of EHV

(b) Describe the problems posed in Extra High Voltage (EHV) AC rransmission.

the

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UNIT - II

Q2 (a) Obtain the mathematical model of the speed governing system and turbine.

(b) Define the concept of load sharing between parallel operating generators.

OR

Q.2 (a) Describe the Automatic generation control along with the block diagram.

(b) Explain Flat Frequency, Flat Tie Line and Tie Line load bias control methods of

Load Frequency control. t8l

UNIT - III

Q.3 (a) Explain the various conventional methods of voltage control along with

advantages & disadvantages. t8l

(b) Explain voltage collapse problem in brief.

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OR

Q.3 (a) Describe thyristorised static VAR compensators-

in detail.

TCR, FC-TCR and TSC-TCR

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(b) Why thyristorised static VAR compensators are better to control Transient

stability, Dynamic stability & Power Oscillations developed in power system? [8]

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UNIT - IV

Q.4 (a) How FACTS controllers are useful to control

transmission line.

(b) Describe the various types of FACTS controllers.

Q.4 Describe in brief-

(?) srArcoM

(b) rcsc

(C) UPFC.

OR

(a) Describe types of HVDC links with the

applications of each of these links.

(b) Explain & draw the basic converters control

margin.

intE:rrelated parameters of

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OR

Q.s (a)

(b)

UNIT - VDiscuss the advantages & disadvantages of HVDC transmission.

Draw a simple scheme of HVDC converter station and describe briefly

components of the converter station.

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main

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Q.s help of diagrams. Discuss the

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characteristics for negative current

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