Electric Generation & Economics BTEE-502 5th Sem B.Tech EE PTU Nov 2016 Paper
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Roll No. ______________
Total No. of Questions : 09
Total No. of Pages : 02
B.Tech.(EE) (2011 Onwards) / (EE) PTU
B.Tech. (Electrical & Electronics) (2011 & 2012 Batch) (Sem.–5)
ELECTRIC GENERATION AND ECONOMICS
Subject Code : BTEE-502 Paper ID : [ A2108]
Time : 3 Hrs. Max. Marks : 60
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions
Electric Generation & Economics BTEE-502 5th Sem B.Tech EE PTU Nov 2016 Paper
SECTION-A
Q1. Write Short Notes on :
1. What are the functions of Central Electricity authority?
2. What is diversity factor? How it is important?
3. What are the effects of low power factor?
4. What is necessity of long term load forecasting?
5. Which type of plant has highest capital cost and why?
6. Compare shunt capacitors and synchronous condensers.
7. What is difference between present worth and capitalised cost?
8. What is equal incremental cost criterion?
9. For which type of countries is hydro-thermal economical?
10. Between which quantities are mass curve and load curve plotted?
SECTION-B
Q2. Attempt any FOUR questions. 5×4=20
2. Write a descriptive note on organization of power sector in India.
3. A 400 V, 3-phase installation draws a current of 50A at 0.8 power factor lagging under full load conditions. It is desired to install a synchronous motor to raise the full load overall power factor to 0.95 lagging. The synchronous motor will drive a 25hp (metric) load at an efficiency of 0.9. Find the kVA and power factor of synchronous motor.
4. Discuss straight line and fixed percentage methods of depreciation.
5. What do you mean by economic comparison of alternators?
6. The load curve of an electrical system is shown below and is linear with the following values at different times of the day. The load is in MW. First row is showing time and second load is showing load.
12 mid night | 5am | 9am | 6pm | 8pm | 10pm | 12 mid night |
50 | 50 | 100 | 100 | 150 | 80 | 50 |
Plot chronological load curve, load duration curve and mass curve for the above mentioned data. Find the energy required by system in one day and calculate the system daily load factor
SECTION-C
Q3. Attempt any TWO questions. 2×10=20
7. Discuss the benefits of cogeneration.
8. a) Write short descriptive note on aquatic impacts.
b) Discuss the iterative procedure to solve the co-ordination techniques.
9.The fuel inputs F1 and F2 in kCal/hour for units 1 and 2 are given by : F1 = (2P1 + 0.005P12 + 20)104
F2 = (1.5P2 + 0.01P22 + 30)104
where P1 and P2 are outputs in MW.
1.Plot the variation of input with output for the two units as the load varies from 20 MW to 100 MW in each case.
ii. Find heat rate in k Cal/MW-hour for each unit and plot it against
iii. If the fuel cost is 1 per 10,000 kCal, calculate incremental fuel cost in Rs. Per MW-hr for each unit and plot it against output.
Functions of Central Electricity authority.
Diversity factor and it is important.
Effects of low power factor.
Necessity of long term load forecasting.
Explain Which type of plant has highest capital cost and why.
Compare shunt capacitors and synchronous condensers.
Difference between present worth and capitalised cost.
Equal incremental cost criterion.
Which type of countries is hydro-thermal economical.
Sol.Between which quantities are mass curve and load curve plotted
Electric Generation & Economics 5th Sem B.Tech EE PTU Nov 2016 Paper
Descriptive note on organization of power sector in India.
400 V, 3-phase installation draws a current of 50A at 0.8 power factor lagging under full load conditions. It is desired to install a synchronous motor to raise the full load overall power factor to 0.95 lagging. The synchronous motor will drive a 25hp (metric) load at an efficiency of 0.9. Find the kVA and power factor of synchronous motor.
Explain straight line and fixed percentage methods of depreciation.
Economic comparison of alternators.
Load curve of an electrical system is shown below and is linear with the following values at different times of the day. The load is in MW. First row is showing time and second load is showing load.
Electric Generation & Economics 5th Sem B.Tech EE PTU Nov 2016 Paper
Benefits of cogeneration.
Short note on aquatic impacts.
Iterative procedure to solve the co-ordination techniques.
Fuel inputs F1 and F2 in kCal/hour for units 1 and 2 are given by : F1 = (2P1 + 0.005P12 + 20)10 F2 = (1.5P2 + 0.01P22 + 30)104 where P1 and P2 are outputs in MW.
Variation of input with output for the two units as the load varies from 20 MW to 100 MW in each case.
Calculate heat rate in k Cal/MW-hour for each unit and plot it against Output.
If the fuel cost is 1 per 10,000 kCal, calculate incremental fuel cost in Rs. Per MW-hr for each unit and plot it against output.
Electric Generation & Economics 5th Sem B.Tech EE PTU Nov 2016 Paper
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