# Power Systems II Syllabus for JNTU

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY,
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.
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.