Exam Details
| Subject | Power System | |
| 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 | December, 2016 | |
| City, State | new delhi, |
Question Paper
What is per unit (p.u.) system? Discuss the procedure to convert the actual values into per unit values with the help of suitable example.
The line currents in a 3-phase supply to an unbalanced load are Ia= 10 j20,Ib =12 j10 and Ic j5 amperes. The phase sequence is abc. Determine the sequence components of the currents.
What are the various unsymmetrical faults? Derive the expression of -single line to ground. fault through Zf on phase of unloaded generator.
A three-phase generator rated at 11 kV, 20 MVA has a solidly grounded neutral. Its positive, negative and zero sequence reactances are 25% and 15% respectively.
Determine the value of reactance that should be placed in the generator neutral such that the current for single line to ground fault does not exceed the rated current.
What value of the resistance in the neutral will serve the same purpose?
3. Explain the Newton-Raphson Algorithm for load flow solution.
Derive the Swing equation. Why is the Swing equation so important in the study of transient stability?
A30MVA, 15 kV, 4-pole, 50 Hz turbo-alternator has an inertia constant of 10 kW-sec/kVA.
Compute the kinetic energy stored by the rotor at synchronous speed.
If the input power and Qutput power are 25 MW and 20 MW respectively, find the acceleration in deg/sec^2.
5. Discuss the phenomenon of travelling wave over a transmission line. Establish the relation between the voltage and current waves travelling over the transmission line and for their velocity of propagation. Also derive an expression for the velocity of propagation for overhead line.
6. Discuss the purpose of load flow studies of a power system. Also classify the buses for load flow analysis.
Discuss the various methods for transient stability improvements.
7. Write short notes on any two of the following:
Computer Method for Short Circuit Calculations
Nodal Admittance Matrix
Decoupled and Fast Decoupled Method of Load Flow Analysis
The line currents in a 3-phase supply to an unbalanced load are Ia= 10 j20,Ib =12 j10 and Ic j5 amperes. The phase sequence is abc. Determine the sequence components of the currents.
What are the various unsymmetrical faults? Derive the expression of -single line to ground. fault through Zf on phase of unloaded generator.
A three-phase generator rated at 11 kV, 20 MVA has a solidly grounded neutral. Its positive, negative and zero sequence reactances are 25% and 15% respectively.
Determine the value of reactance that should be placed in the generator neutral such that the current for single line to ground fault does not exceed the rated current.
What value of the resistance in the neutral will serve the same purpose?
3. Explain the Newton-Raphson Algorithm for load flow solution.
Derive the Swing equation. Why is the Swing equation so important in the study of transient stability?
A30MVA, 15 kV, 4-pole, 50 Hz turbo-alternator has an inertia constant of 10 kW-sec/kVA.
Compute the kinetic energy stored by the rotor at synchronous speed.
If the input power and Qutput power are 25 MW and 20 MW respectively, find the acceleration in deg/sec^2.
5. Discuss the phenomenon of travelling wave over a transmission line. Establish the relation between the voltage and current waves travelling over the transmission line and for their velocity of propagation. Also derive an expression for the velocity of propagation for overhead line.
6. Discuss the purpose of load flow studies of a power system. Also classify the buses for load flow analysis.
Discuss the various methods for transient stability improvements.
7. Write short notes on any two of the following:
Computer Method for Short Circuit Calculations
Nodal Admittance Matrix
Decoupled and Fast Decoupled Method of Load Flow Analysis
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
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- School of Continuing Education (SOCE)
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- School of Foreign Languages (SOFL)
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- School of Humanities (SOH)
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- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
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- School of Performing Arts and Visual Arts(SOPVA)
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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