Visvesvaraya Technological University (VTU) 2006 B.E Electrical and Electronics Engineering 5th SEM / ELECTRICAL POWER GENERATION - Question Paper

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NEW SCHEME

Reg. No.

Fifth Semester B.E. Degree Examination, January/February 2006

9    

Electrical & Electronics Engineering

Electrical Power Generation

(Max.Marks : 100

Note: 7. Answer any FNE full questions.

2. Missing data may be suitably assumed.

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1.    (a) With neat diagrams explain the following w.r.t hydel power plant

I) Penstock    ii) Surge tank

iii) Water jet mechanism iv) Tail race.

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(8 Marks)

(b)    -With a neat sketch explain the function of a governor used to control the speed

of a hydraulic turb'ne.    (6 Marks)

(c)    With a neat sketch explain the function of pumped storage plant. Discuss how such a plant will meet the peak load requirement.    (6 Marks)

2.    (a) With neat sketches explain the function of any two types of coal handling system.

(8 Marks)

(b)    With a neat sketch explain the condenser used in the thermal power plant. Discuss on electrostatic precipitator.    <6 Marks)

(c)    With a neat sketch explain any one method of ash handling system. (6 Marks)

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3.    (a) With a neat schematic diagram explain the functioning of pressurized water reactor.

Also indicate diagrammaticaily the pressurized water reactor with water as coolant and moderator.    <8 Marks)

(b)    With a schematic diagram explain the LMFBR. Differentiate between fast breeder reactor and thermcl reactor.    (6 Marks)

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(c)    Discuss on the following :

i)    Harmful effects of nuclear reactor    -

,

ii)    Disposal of nuclear wastes.    - (6 Marks)

4.    (a) Explain the alternator excitation system showing the generator control loops and

the functional diagrcm of excitation system.    (8 Marks)

<b) With a neat diagram explain a simple gas turbine. Discuss the advantages of the same over stearn power plant.    (8 Marks)

(c) Highlight main features of the combined-cycle power plants.    (4 Marks)

Contd.... 2

Page No... 2

5. (a) Define the following with Illustration :

I) Demand factor

ii)    Plant use factor

iii)    Plant capacity factor."

(b) The load is kW on a substation is as follows:

Time	Load in kW	Time	Load in kW
12.0 AM to 1 AM	1200	12 PM to 4 PM	1100
1 AM to 3 AM	1000	4 PM to 8 PM	1800
3 AM to 5 AM	900	8 PM to 10 PM	1000
5 AM to 7 AM	1400	10 PM to 12 AM	600
7 AM to 9 AM	1000		1
9 AM to 12 PM	800

Assume the connected load to be 5200 kW

Draw the load curve and load duration curve. Deiermine :

i)    Maximum demand

ii)    Demand factor Iii) Load factor.

(c) Discuss the base load and peak load power plants.

6.    (a) WncT do you understand by electrical tariff? Discuss on two part tariff, three part

tariff and power factor tariff.    (8 Marks)

(b)    What are the causes of low power factor? Explain the methods of improving power factor.    (4 Marks)

(c)    Load factor of a consumer is 35% and monthly consumption is 504 kWhr. If the rate of electricity is Rs.180 per kW of maximum demand plus Rs.2.00 per kWhr, find

i)    the monthly bill and average cost per kWhr.

ii)    The overall cost per kWhr if the consumption is increased by 20% with same LF

iii)    Overall cost per kWhr if consumption remains same but LF is increased to 40%

(8 Marks)

7.    (a) It is desired to improve the power factor from cos 61 to cos 62 keeping the kW of

the system at a constant value of PKW. Derive an expression for the rating of the caoacitor.    (8 Marks)

(b) Discuss the importance of grounding system in electrical systems. With neat sketches explain

i)    Resistance grounding

ii)    Reactance grounding. .

(c) With a neat sketch explain an ungrounded system.

Contd.... 3

Attachment: visvesvaraya-technological-university--vtu--2006-b-e-electrical-and-electronics-engineering-41891-1.jpg visvesvaraya-technological-university--vtu--2006-b-e-electrical-and-electronics-engineering-41891-2.jpg

Earning:   Approval pending.