Exam Details
| Subject | Power System - I | |
| Paper | ||
| Exam / Course | B.Tech. VIEP- Electrical Engineering III (BTCSVI/BTECVI/BTELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
Give the comparison between DC and AC systems of transmission and distribution.
What are the advantages and disadvantages of HVDC transmission as compared to the usual 3-phase AC transmission
What do you mean by string efficiency How can it be improved?
What is corona loss? Explain briefly the factors which affect corona loss.
Explain briefly the 'skin effect' in a transmission line. On what factors does it depend?
Derive the formula of capacitance of a 2-wire line, having radius of conductor and distance between them as
Explain the classification of transmission lines based on their length of transmission. Also explain the Ferranti effect with a phasor diagram.
Explain the various methods of grading of cables.
Discuss how transposition helps in equalising the capacitances in an unsymmetrically spaced 3-phase overhead transmission line.
A single phase, 230 50 Hz, line for street light purposes runs using 7/2.11 conductor over a length of 3·2 km. The conductor spacing is 0·6 km. Determine the resistance, inductance and impedance of the line per km. The resistance per conductor is 1·4 ohm at 20°C.
In a 3-phase transmission line, the three conductors are placed at the corners of a triangle of sides 1·5 m,3 m and 2·6 m respectively. If the diameter of each conductor is 1·4 cm and the conductors are regularly transposed, calculate the inductance/phase/km length of the line.
Explain the physical significance of the generalised ABCD constants of a transmission line. State the units of these constants. Determine these constants for a medium transmission line with nominal T-configuration.
7. Write short notes on any two of the following:
Types of insulators used for transmission lines
Variation of sag with load and temperature
Modified Kelvin's law for feeder conductor size
What are the advantages and disadvantages of HVDC transmission as compared to the usual 3-phase AC transmission
What do you mean by string efficiency How can it be improved?
What is corona loss? Explain briefly the factors which affect corona loss.
Explain briefly the 'skin effect' in a transmission line. On what factors does it depend?
Derive the formula of capacitance of a 2-wire line, having radius of conductor and distance between them as
Explain the classification of transmission lines based on their length of transmission. Also explain the Ferranti effect with a phasor diagram.
Explain the various methods of grading of cables.
Discuss how transposition helps in equalising the capacitances in an unsymmetrically spaced 3-phase overhead transmission line.
A single phase, 230 50 Hz, line for street light purposes runs using 7/2.11 conductor over a length of 3·2 km. The conductor spacing is 0·6 km. Determine the resistance, inductance and impedance of the line per km. The resistance per conductor is 1·4 ohm at 20°C.
In a 3-phase transmission line, the three conductors are placed at the corners of a triangle of sides 1·5 m,3 m and 2·6 m respectively. If the diameter of each conductor is 1·4 cm and the conductors are regularly transposed, calculate the inductance/phase/km length of the line.
Explain the physical significance of the generalised ABCD constants of a transmission line. State the units of these constants. Determine these constants for a medium transmission line with nominal T-configuration.
7. Write short notes on any two of the following:
Types of insulators used for transmission lines
Variation of sag with load and temperature
Modified Kelvin's law for feeder conductor size
Other Question Papers
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Subjects
- Active Filter Design
- Advanced Control System
- Advanced Power Electronics
- Applied Electromagnetics
- Basics Of Electrical Engineering
- Computer Process Control
- Control System
- Digital Electronics
- Electric Energy Utilization
- Electrical And Electronics Engineering Materials
- Electrical Instrumentation
- Electrical Machine - I
- Electrical Machines - Ii
- Electrical Machines And Electronics
- Electrical Measurements And Measuring Instruments
- Electro Mechanical Energy Conversion - I
- Electro-Mechanical Energy Conversion - Ii
- Electro-Mechanical Energy Conversion-Iii
- Electromagnetic Theory
- Energy Auditing And Analysis
- High Voltage Engineering
- Industrial Drives
- Micro Controllers
- Microprocessor And Applications
- Network Theory
- Power Quality Issues And Remedial Measures
- Power System
- Power System - I
- Stochastic Control Systems
- Switchgear And Protection