# Power Systems II Syllabus for JNTU

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY,

KAKINADA

III Year B.Tech EEE I-Sem T P C

4+1* 0 4

POWER SYSTEMS-II

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.

UNIT-I 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.

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

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).

UNIT – IV 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).

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, Radio

Interference.

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 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.

Page 46 of 85 2007-08

TEXT BOOKS:

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.

REFERENCE BOOKS:

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.