RTU 2016 Question Paper Semester VIII Electrical and Electronics Engineering EHV ACDC Transmission

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.-. B.Tech. vIII Semester (Main) Examination, April 2016
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' Electrical and Electronics Engineering
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€ SEX1 A EI{V AC/DC Transmission
Common with 8EE1A

Time : 3 Hours Maximum Marks
Min. Passing Marks

Instructions to Candidates
Attempt any live questions, selepting one question from each
unit' All questions
c:arry- equit- morks. (Schrematic diagrams must be shown
wherever necessary'
Any data you feel missing suitably be assumed'and stated clearly'
units of quantities used/calculated must be stated clearly

Unit - I

Explain^the technical and economical reasons for adopting
EHV transmission
1. a)
.yrt.rn for transfer of'bulk power over long distance
line? Write is the
b) What is meant by power handling capacity of a transmission
loss in the
equation from power handling *pudity und p.t""ntage transfer
iii. *plaiir t o* tt . high6r transmission voltageJare importani for bulk(8)
;;;;;t;;I;i*""
"rO

OR
transmission'
1. a) Give the reasons in detail for using bundled conductor inEHVAC
Briefly explain th;;;p..tr"t ofi"nOled conductor (8)

b) Describe the effect of electrostatic field on

i) Humans

ii) Animals
(8)
iii) Plants

(1) IContd...
8E 8041 /zore

Unit - il
2. a) Two gene.utor rut.d 250MW and 500MW are operatingin para1lef . The d..9p
chara"cteristics of the governors are 4olo and 5olo respectively. Hoy would a
load of 750 MW be shired between them? What will be the system frequency?
Take nominal frequency is 60Hz (8)

b) Explainthe automatic generation control along with the block diagram (8)
OR
2- a) Explainthe flat frequency, flattie line and tie line,loadbias control method of
load frequency oontrol (8)

b) Draw schematic diagram of a speed governing system to control the real'
power flow in po*eisystem and-explain in brief (8)
'Unit - III

3. a) What do you mean by reactive power? Give various sources of reactive
power (8)

b) What are the tlpes of tap changing transformer? Describe their funotion to
control the votlage (8)

OR
3. a) What do you.mean by shunt compensation? How it is different from series
compensition. (8)

b) Write short notes on
1) FC-TCR
ii) Boostertransformer (8)

Unit - IV
4. a) Explain the working of IIPFC used for power system (8)

b) Explain how the STIIICOM is used.as a FACT controller (8)

OR
4. a) Explain ffies of FACTS controllers (8)

b) Explain briefl y how voltage control and reactive power control can be achieved
using a TCSC-TCR (8)

8E 8041 (2)

Unit - V
with the use of
s. a) What is ground return? What are the problems associated (8)
ground as the ,"t,rri-
"",4t'"tot
b) Explain in detaits the different types of DC link1 (8)

OR

5. a) Discuss the advantages and disadvantages of HVDc
Uansmission (8)
for HVDC
b) with a neat schematic diagram st13 ttre various apparatus lequired
station and explain purpose of each

aE en/l (3)