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EPEG 315

EPEG 315                POWER SYSTEMS I                        3 Credits

Objective: To impart a broad overview of the design and implementation of modern power systems.


Introduction to Power Systems: Historical developments, basic structure. Power generation: thermal, hydro & nuclear power plants. Non-conventional futuristic energy sources. Energy storage and conservation facilities. Different types of supply systems, Comparison of conductor costs in various systems; problems

Series impedance of transmission lines: Line parameters, resistance, inductance, definition of induction, inductance of a conductor due to internal flux, inductance due to external flux linkages, inductance of a single phase two wire line, flux linkages of one conductor in a group, composite conductors, inductance of 3-Φ lines with equilateral spacing, unsymmetrical spacing, bundled conductors, parallel circuit 3-Φ lines, problems

Capacitance of transmission lines: Capacitance of a two wire line, system of conductors, capacitance of a 3-Φ line with equilateral spacing, unsymmetrical spacing, earth effects on line , bundled conductors capacitance, problems

Per unit representation: Introduction , advantages, one line diagram, impedance diagram, problems

Transmission line: Short and medium transmission line, phasor diagram, Pi and T equivalents, general constants, transmission efficiency, long transmission line, interpretation of the equations, the equivalent circuit of a long line, power flow through a transmission line , problems

Distribution System: Voltage level, radial and loop system, ac & dc distribution systems, comparison of different types of system and their advantages & disadvantages.

Overhead Line Insulators: Types of insulators, potential distribution over a string of suspension insulators, methods of equalizing potentials, problems

Mechanical Design of Transmission Lines: The catenary curve, sag tension calculations, support at different levels, stringing chart, sag template, equivalent span, stringing of conductors, vibration and vibration dampers, problems

Corona: Critical disruptive voltage, corona loss, line design based on corona, disadvantages of corona, radio interface, inductive interfaces between power and communication lines

Insulated cables: The insulation, EHV cables, grading of cables, insulation resistance of cables, capacitance of single core cable, current rating of cable, overhead lines vs underground cables, types of cables

HVDC transmission: Advantage of HVDC, mono-bi-homo polar dc links, reactive Var requirements of HVDC converters, equivalent circuit of HVDC transmission line

Introduction of Different Types of Power Plants: MHD, wind, solar, biomass, schematic diagram of hydro power plant, hydro power plant essentials, advantages and disadvantages, nuclear power plant, gas turbine power plant, generating plants, plant installation, combined working of different plants, parallel operation, load duration curve, load allocation, control of plant, general economic problems, general terminology, depreciation, energy rates, tariffs, problems

Circuit Breakers: Types, basic principle of operation


  1. William D. Stevenson, Jr., Elements of Power System Analysis
  2. Ashfaq Husain, Electrical Power System
  3. C.L. Wadhwa, Electrical Power System
  4. V.K.Mehta, Electrical Power System

Course of Study

Course of Study

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