Power Engineering 3 ENG3041

  • Academic Session: 2018-19
  • School: School of Engineering
  • Credits: 10
  • Level: Level 3 (SCQF level 9)
  • Typically Offered: Semester 2
  • Available to Visiting Students: Yes
  • Available to Erasmus Students: Yes

Short Description

Power Engineering 3 is an introduction to modern electrical power systems, investigating electrical power generation, transmission and loading. The course covers the basic theory of 3 phase transmission, transformers, induction machines and synchronous generators.


2 lectures per week

Requirements of Entry

Mandatory Entry Requirements


Recommended Entry Requirements


Excluded Courses





90% Examination

10% Laboratory report

Main Assessment In: April/May

Course Aims

The aim of this course is to introduce the basis of electrical power engineering in relation to energy generation, distribution and utilization and to the control of electrical power, including the main principles of power circuits, control techniques and major electric power equipment. The course can be taken as a foundation for all of the electrical power engineering options in fourth and fifth years, or as a "stand-alone" basic course in power engineering as part of any of the general electrical/electronic engineering degree courses.

Intended Learning Outcomes of Course

By the end of this course students will be able to:


Lectures 1 - 6: Single Phase & Three Phase Power Systems

■ demonstrate a basic knowledge of the history of electrical power engineering;

■ comprehend the basic components of an electrical power system;

■ define voltage and current phasor's for single phase networks including resistive, inductive and capacitive components;

■ calculate voltage and currents for single phase networks;

■ interpret the Power Triangle for single phase systems;

■ calculate real, apparent and reactive power in single phase systems;

■ comprehend 3 phase generation;

■ identify star and delta connected loads in 3 phase systems;

■ calculate phase and line voltages and currents for balanced 3 phase loads;

■ calculate real, apparent and reactive power in balanced 3 phase systems;

■ identify 3 and 2 wattmeter power measurements and comprehend when each should be used;

■ calculate voltage and current phasors in unbalanced 3 phase systems;

■ calculate real, apparent and reactive power in unbalanced 3 phase systems;


Lectures 7-10: Single Phase & Three Phase Transformers

■ identify the component parts of a single phase transformer;

■ state the voltage, current and power equations for an ideal single phase transformer;

■ investigate the non-ideal equivalent circuit for a single phase transformer;

■ determine the equivalent circuit parameters from test;

■ evaluate the performance of single phase transformers in terms of efficiency and regulation;

■ examine 3 phase transformer topologies;


Lectures 11-13: Three Phase Induction Motor

■ distinguish between different types of electric motors;

■ contrast between brushless and brushed motors in terms of construction and performance;

■ examine the construction and basic operation of a three phase induction motor;

■ derive the equivalent circuit for a three phase induction motor;

■ evaluate the torque v speed curve;

■ determine the equivalent circuit parameters from test;

■ calculate machine performance (torque, efficiency, power factor etc) from the equivalent circuit;


Lectures 14-16: Synchronous Generator

■ examine the physical construction of synchronous generators;

■ appraise the basic theory of operation;

■ derive the per phase equivalent circuit for the synchronous generator;

■ calculate output power based on equivalent circuit parameters;

■ examine the various modes of operation eg Over-Excited;

■ investigate Grid connected and Stand Alone modes;

■ interpret the Safe Operating Limits chart.


Minimum Requirement for Award of Credits

Students must attend the degree examination and submit at least 75% by weight of the other components of

the course's summative assessment.

Students must attend the timetabled laboratory classes.

Note that these are minimum requirements: good students will achieve far higher participation/submission

rates. Any student who misses an assessment or a significant number of classes because of illness or

other good cause should report this by completing a MyCampus absence report.