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Wednesday, February 23, 2011

Educational videos of Power Systems-II

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By Prof.D.P.Kothari, Centre for Energy Studies, IIT Delhi.


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Objective :
This course is an extension of Power systems-I course. It deals with basic theory of transmission lines
modeling and their performance analysis. Also this course gives emphasis on mechanical design of
transmission lines, cables and insulators.

Transmission Line Parameters
Types of conductors - calculation of resistance for solid conductors - Calculation of inductance for single
phase and three phase, single and double circuit lines, concept of GMR & GMD, symmetrical and
asymmetrical conductor configuration with and without transposition, Numerical Problems.
Calculation of capacitance for 2 wire and 3 wire systems, effect of ground on capacitance, capacitance
calculations for symmetrical and asymmetrical single and three phase, single and double circuit lines,
Numerical Problems.

Performance of Short and Medium Length Transmission Lines
Classification of Transmission Lines - Short, medium and long line and their model representations -
Nominal-T, Nominal-Pie and A, B, C, D Constants for symmetrical & Asymmetrical Networks, Numerical
Mathematical Solutions to estimate regulation and efficiency of all types of lines - Numerical Problems.

Performance of Long Transmission Lines
Long Transmission Line-Rigorous Solution, evaluation of A,B,C,D Constants, Interpretation of the Long
Line Equations, Incident, Reflected and Refracted Waves -Surge Impedance and SIL of Long Lines,
Wave Length and Velocity of Propagation of Waves - Representation of Long Lines - Equivalent-T and
Equivalent Pie network models (numerical problems).

Power System Transients
Types of System Transients - Travelling or Propagation of Surges - Attenuation, Distortion, Reflection and
Refraction Coefficients - Termination of lines with different types of conditions - Open Circuited Line, Short
Circuited Line, T-Junction, Lumped Reactive Junctions (Numerical Problems). Bewley’s Lattice Diagrams
(for all the cases mentioned with numerical examples).

Various Factors Governing the Performance of Transmission line
Skin and Proximity effects - Description and effect on Resistance of Solid Conductors -
Ferranti effect - Charging Current - Effect on Regulation of the Transmission Line, Shunt Compensation.
Corona - Description of the phenomenon, factors affecting corona, critical voltages and power loss, Radio

Overhead Line Insulators
Types of Insulators, String efficiency and Methods for improvement, Numerical Problems - voltage
distribution, calculation of string efficiency, Capacitance grading and Static Shielding.

Sag and Tension Calculations
Sag and Tension Calculations with equal and unequal heights of towers, Effect of Wind and Ice on weight
of Conductor, Numerical Problems - Stringing chart and sag template and its applications.

Underground Cables
Types of Cables, Construction, Types of Insulating materials, Calculations of Insulation resistance and
stress in insulation, Numerical Problems.
Capacitance of Single and 3-Core belted cables, Numerical Problems.
Grading of Cables - Capacitance grading, Numerical Problems, Description of Inter-sheath grading.

1. A Text Book on Power System Engineering by M.L.Soni, P.V.Gupta, U.S.Bhatnagar,
A.Chakrabarthy, Dhanpat Rai & Co Pvt. Ltd.
2. Electrical power systems - by C.L.Wadhwa, New Age International (P) Limited, Publishers,1998.

1. Power system Analysis-by John J Grainger William D Stevenson, TMC Companies, 4th edition
2. Power System Analysis and Design by B.R.Gupta, Wheeler Publishing.
3. Power System Analysis by Hadi Saadat – TMH Edition..
4. Modern Power System Analysis by I.J.Nagaraj and D.P.Kothari, Tata McGraw Hill, 2nd Edition.
Educational videos of Power Systems-II Reviewed by creativeworld9 on 10:15 AM Rating: 5 Download/Source url : By Prof.D.P.Kothari, Centre for Ener...


  1. Can I find videos unit wise????


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