Exam Details
| Subject | power system generation | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | May, 2018 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No:
Question Paper Code: A3210
VARDHAMAN COLLEGE OF ENGINEERING
(AUTONOMOUS) B. Tech IV Semester Regular Examinations, May 2018
(Regulations: VCE-R15) POWER SYSTEM GENERATION
(Electrical and Electronics Engineering) Date: 25 May, 2018 FN
Time: 3 hours
Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1.
With a neat schematic, explain the structure of a power system with a single line diagram.
8M
If the catchment area of a reservoir is 200Km2 and annual rainfall is 1000mm, find the available continuous power in KW for which the station having effective head of 200m. Yield factor to allow run off and loss by evaporation is 50%. Efficiency of the plant is 80%. Explain the formula used.
7M
2.
Explain how a pumped storage results in overall economy in an interconnected system.
7M
Explain the various aspects of combined operation of power stations. Also define base loads and peak loads.
8M
Unit II
3.
With a block diagram, explain coal handling in a thermal power plant.
9M
A thermal power plant spends Rs.25lakh in one year as coal consumption. The coal has heating value of 5000kcal/kg and costs Rs.500 per ton. If the thermal efficiency is 35% and the electrical efficiency is find the average load on the power plant.
6M
4.
Describe the schematic arrangement of a thermal power station. Briefly explain the functions of each.
9M
What are the functions of economizer and super heater in a thermal power plant?
6M
Unit III
5.
Discuss some of the safety measures incorporated in nuclear power plants.
6M
Explain the functions of each of the following:
i. Control rod
ii. Moderator
iii. Reflector
iv. Biological shield
9M
6.
Briefly discuss on nuclear materials used in nuclear power plant.
9M
What are the advantages of a gas turbine plant over a steam power plant?
6M
Unit IV
7.
With neat sketches, explain the different arrangements of bus bars.
7M
What are the rules to be followed to select an ideal location for a distribution substation?
8M
8.
What are the different classes of substations?
7M
Draw and briefly explain the double breaker scheme in substation.
8M
Cont…2
2
Unit V
9. Define the following:
i. Diversity factor
ii. Load factor
iii. Plant capacity factor
iv. Plant use factor
v. Plant utilization factor
vi. Loss factor
8M
A generating station has connected load of 450MW and a maximum demand of 250MW,
units generated being 6 kWh per annum. Calculate the demand factor and load
factor.
7M
10. What is the need for power factor improvement? Explain briefly. 5M
Load factor is 35% and the monthly consumption is 504kWh. If the rate of electricity is
Rs.180 per kW of maximum demand plus Rs.2.00 per kWh, find:
i. The monthly bill and the average cost per kWh
ii. The overall cost per kWh if the consumption is increased by 20% with the same load
factor
10M
Question Paper Code: A3210
VARDHAMAN COLLEGE OF ENGINEERING
(AUTONOMOUS) B. Tech IV Semester Regular Examinations, May 2018
(Regulations: VCE-R15) POWER SYSTEM GENERATION
(Electrical and Electronics Engineering) Date: 25 May, 2018 FN
Time: 3 hours
Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1.
With a neat schematic, explain the structure of a power system with a single line diagram.
8M
If the catchment area of a reservoir is 200Km2 and annual rainfall is 1000mm, find the available continuous power in KW for which the station having effective head of 200m. Yield factor to allow run off and loss by evaporation is 50%. Efficiency of the plant is 80%. Explain the formula used.
7M
2.
Explain how a pumped storage results in overall economy in an interconnected system.
7M
Explain the various aspects of combined operation of power stations. Also define base loads and peak loads.
8M
Unit II
3.
With a block diagram, explain coal handling in a thermal power plant.
9M
A thermal power plant spends Rs.25lakh in one year as coal consumption. The coal has heating value of 5000kcal/kg and costs Rs.500 per ton. If the thermal efficiency is 35% and the electrical efficiency is find the average load on the power plant.
6M
4.
Describe the schematic arrangement of a thermal power station. Briefly explain the functions of each.
9M
What are the functions of economizer and super heater in a thermal power plant?
6M
Unit III
5.
Discuss some of the safety measures incorporated in nuclear power plants.
6M
Explain the functions of each of the following:
i. Control rod
ii. Moderator
iii. Reflector
iv. Biological shield
9M
6.
Briefly discuss on nuclear materials used in nuclear power plant.
9M
What are the advantages of a gas turbine plant over a steam power plant?
6M
Unit IV
7.
With neat sketches, explain the different arrangements of bus bars.
7M
What are the rules to be followed to select an ideal location for a distribution substation?
8M
8.
What are the different classes of substations?
7M
Draw and briefly explain the double breaker scheme in substation.
8M
Cont…2
2
Unit V
9. Define the following:
i. Diversity factor
ii. Load factor
iii. Plant capacity factor
iv. Plant use factor
v. Plant utilization factor
vi. Loss factor
8M
A generating station has connected load of 450MW and a maximum demand of 250MW,
units generated being 6 kWh per annum. Calculate the demand factor and load
factor.
7M
10. What is the need for power factor improvement? Explain briefly. 5M
Load factor is 35% and the monthly consumption is 504kWh. If the rate of electricity is
Rs.180 per kW of maximum demand plus Rs.2.00 per kWh, find:
i. The monthly bill and the average cost per kWh
ii. The overall cost per kWh if the consumption is increased by 20% with the same load
factor
10M
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