Course Overview

This introductory course will cover the basic concepts involved in power transmission and distribution systems: Components of power systems; Transmission line as a component of power system; Line conductors; Line parameters and their calculations; Performance of transmission lines; Traveling waves on the transmission lines, Power limits of transmission systems, Voltage Control, Interference of power with communication lines

O.H.T.L An overhead power line is an electric power transmission line suspended by towers or utility poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric energy. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics.

Course Objectives

Upon completion of this course, students will:

• Gain a broad overview of electric power systems including generation, transmission, and distribution.

• Become familiar with the basic operation, behavior, and modeling of transmission lines.

• Determine conductor sag, tension, and mechanical forces on overhead structures

• Describe performance and economic factors relevant to the specification of wood, steel, and concrete poles and structural components

• Determine insulation levels and select insulators, lightning arresters, grounding, and other

• components coordinated to provide acceptable lightning performance

Who Should Attend

This course will be very beneficial for Electrical Technicians and individuals working in the areas of Design, Construction, Operation, Maintenance, or Safety of Electrical Overhead Distribution Lines in a Power Utility Companies, including Engineers, Designers, Contractors, Inspectors, and Safety Personnel.

Course Content

Module (01) Introduction to Power System Engineering

1.1 Overview of Generation; Transmission & Distribution of Electrical Power

1.2 Layout of Transmission & Distribution System

1.3 Choice of System Voltage & Frequency; Comparison between AC and DC Power Systems

1.4 System units and parameter

Module (02) Balanced 3-Phase Voltages

2.1 Basic Three-Phase Circuit Connections 

 2.2 Basic Three-Phase Relationships

2.3 Active power, reactive power, and apparent power in a 3-phase system

2.4 Advantages of three-phase systems 

2.5 Unbalanced Three-Phase Systems

Module (03) Inductance of Overhead Transmission Lines

3.1 Transmission Line Conductors

3.2 Inductance of a conductor due to internal and external flux linkages

3.3 Inductance of single phase transmission line

3.4 Flux linkages of a conductor in a group of conductors

3.5 Inductance of composite conductor 

3.6 Three phase conductor with equilateral and unequilateral spacing with the concept of transposition

3.7 Inductance of double circuit transmission line

3.8 Inductance of bundled conductor transmission line.

Module (04) Capacitance of Overhead Transmission Lines 

4.1 Capacitance of single phase transmission line; 

4.2 Capacitance of composite conductor; 

4.3 Three phase conductor with equilateral and unequilateral spacing with the concept of transposition

4.4 Capacitance of double circuit transmission line

4.5 Capacitance of bundled conductor transmission line

4.6 Capacitance of single and three phase transmission line taking into account the effect of ground

Module (05) Transmission Line Analysis

5.1 Parameters of Transmission Line

5.2 Classification of Transmission Lines

5.3 Modeling and analysis of short, medium and long transmission lines

5.4 Generalized circuit constants

5.5 Concept of SIL and propagation constant

Module (06) Traveling Waves on Transmission Lines 

6.1 Transient analysis of a transmission line

6.2 Reflection & refraction at the junction of two lines

6.3 Reflection at the short and open circuit end of line

6.4 Bewley lattice diagram.

Module (07) T.L Accessories and Function & Protection Philosophy 

7.1 Protection philosophy used to protect the power station system. 

7.2 Types of insulators and string efficiency. 

7.3 Types of accessories and function. 

7.4 Overhead TL, Underground TL. 

7.5 Transmission line types. 

7.6 Smith chart and solving microwave problems by using this chart.

Module (08) Overhead T.L Maintenance 

8.1 Power plant maintenance (preventive maintenance) 

8.2 Power factor, How to improve the power factor 

8.3 Why we are using high voltage in transmission line instead of high Current

8.4 Mechanism of heat flow in cable 

8.5 DC and AC distribution 

8.6 Lock out and Tag out procedure during the maintenance

Module (09) Overhead T.L Maintenance Washing Procedures 

9.1 Solving of TL problems, Earthing system 

9.2 Live line insulator washing procedures for MV and HV power line 

9.3 SCADA system to monitor 

9.4 Distribution plant, Voltage drop 

9.5 Reducing the power consumption 

9.6 Daily and weekly check should be done in our systems 

9.7 Difference between turbines and generators 

9.8 What is the newest technology in power transmission system?