Subject Code:55011 L:4 T/P/D:0 Credits:4 Int. Marks:25 Ext. Marks:75 Total Marks:100
UNIT I: Transmission Line Parameters
Types of conductors - calculation of resistance for solid conductors - Calculation of inductance for single phaseand three phase, single and double circuit lines, concept of GMR & GMD, symmetrical and asymmetricalconductor configuration with and without transposition, Numerical Problems.Calculation of capacitance for 2 wire and 3 wire systems, effect of ground on capacitance, capacitancecalculations for symmetrical and asymmetrical single and three phase, single and double circuit lines, NumericalProblems
UNIT II: 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 Problems.Mathematical Solutions to estimate regulation and efficiency of all types of lines - Numerical Problems.
UNIT III: Performance of Long Transmission Lines
Long Transmission Line-Rigorous Solution, evaluation of A,B,C,D Constants, Interpretation of the Long LineEquations, Incident, Reflected and Refracted Waves -Surge Impedance and SIL of Long Lines, Wave Lengthand Velocity of Propagation of Waves - Representation of Long Lines - Equivalent-T and Equivalent Pie networkmodels (numerical problems).
UNIT IV: Power System Transients
Types of System Transients - Travelling or Propagation of Surges - Attenuation, Distortion, Reflection andRefraction Coefficients - Termination of lines with different types of conditions - Open Circuited Line, ShortCircuited Line, T-Junction, Lumped Reactive Junctions (Numerical Problems). Bewley’s Lattice Diagrams (for allthe cases mentioned with numerical examples).
UNIT V: 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, RadioInterference.
UNIT VI: 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
UNIT VII: 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.
UNIT VIII: Underground Cables
Types of Cables, Construction, Types of Insulating materials, Calculations of Insulation resistance and stress ininsulation, Numerical Problems.Capacitance of Single and 3-Core belted cables, Numerical Problems.Grading of Cables - Capacitance grading, Numerical Problems, Description of Inter-sheath grading.
TEXT BOOKS:
1. A Text Book on Power System Engineering by M.L.Soni, P.V.Gupta, U.S.Bhatnagar,
Electrical power systems - by C.L.Wadhwa, New Age International (P) Limited, Publishers,1998.
REFERENCE BOOKS:
1. Power system Analysis-by John J Grainger William D Stevenson, TMC Companies, 4th edition
edition2. Power System Analysis and Design by B.R.Gupta, Wheeler Publishing
3. Power System Analysis by Hadi Saadat – TMH Edition.
. Modern Power System Analysis by I.J.Nagaraj and D.P.Kothari, Tata McGraw Hill, 2