Course Description

3021 - Electric Energy Systems

Course Code:	3021
Course Title	Electric Energy Systems
Academic Year:	2006
Semester:	2
Lecturer:	Dr Rastko Zivanovic
E-mail Address:	rastko@eleceng.adelaide.edu.au

Aims: This course provides a broad introduction to the area of electric energy systems including power circuit analysis techniques, energy conversion principles, common electrical machines and electric power systems principles.

Outcomes: After passing this subject, students should be familiar with how electrical energy is generated, transmitted and utilized and have an understanding of the general principles of transformers, DC and AC machines, and electric power systems.

Previous Studies: This course follows on from the first year course, Electrical Engineering I and the second year courses Engineering Electromagnetics and Electronics II.

Assumed Knowledge:

complex number representation and arithmetic,
basic DC and sinusoidal steady-state AC electrical circuit analysis: eg. Ohm’s law, Kirchhoff’s Voltage Law, Kirchhoff’s Current Law, phasor representation of sinusoidal AC signals, series and parallel impedances, Thevenin's theorem (Electrical Engineering I, Electronics II),
concept of complex, real and reactive power, power triangle (Electrical Engineering I),
basic properties of magnetic materials, Ampere's law, Faraday's Law, concepts for DC machines and transformers (Engineering Electromagnetics).

Further Studies:

Power Electronics and Motor Drives,
Power Quality and Condition Monitoring.

Delivery Methods:

Lecture/Tutorial: 2 lectures per week / 2 consultation hours per week / 4 tutorials in total.

Experiments: four laboratory experiments (AC circuits, transformers, induction machine, synchronous machine) which are run as part of the third-year experimental course but contribute to the assessment of this course.

Course Website: via myUNI and eleceng web page
Copies of the lecture notes and other materials will be posted on this site.

Assessment (provisional): The assessment will consist of three components :
Examination (55%). 2 hours, closed book.
Quizzes (20%). Two quizzes (40 mins long each) held during the semester.

Experiments (25%). Four experiments.

A minimum mark of 45% in the exam is required to pass the course, even if your total mark for the course exceeds 45%. Thus if your exam mark is less than 45% then the maximum mark you can receive for the course is 44F.

Reference Books

T. Wildi; “Electrical Machines, Drives, and Power Systems”, Prentice Hall, 3rd, 4th, 5th or 6th editions. Available in the Barr Smith Library.
P.C. Sen: "Electric Machines and Power Electronics Principles", Wiley.
B.M. Weedy and B.J. Corey: "Electric Power Systems", Wiley.

Practice Problems: A set of practice problems will be made available. These problems are divided into sections which match the lecture material. It is expected that you keep up with these problems in step with the lectures.

Tutorials: There will be four tutorials during the semester; these will be based on selected practice problems.

COURSE OUTLINE: ELECTRIC ENERGY SYSTEMS

1. Electrical Energy Systems

Overview of electric energy systems: electric generation (conventional, renewable), conversion, energy storage, power transmission, loads, electric motors, applications.

Electric propulsion systems: pure electric and hybrids; electric bicycles, cars, trains, ships, planes, space travel.

Energy economics: kWhr, energy costs, payback period, running costs.

Electric generation principles: thermal, solar, wind, hydropower.

Electrical safety: electric shock, basic precautions, earthed vs. doubly insulated, fuses, circuit breakers, RCBs.

2. AC Power Circuit Analysis

DC circuit analysis: revision of principles, real power flow, DC power source (maximum power).

AC circuit analysis: revision of principles, complex power (real, reactive, apparent power), real and reactive power flow, power-factor correction, equivalent series and parallel RL circuits.

Instantaneous power waveforms: real and reactive power.

Three-phase AC circuit analysis: balanced systems, power flow, phase sequence, star/delta, three-phase terminology, single-phase equivalent circuit, power measurement, losses and efficiency.

3. Electromagnetics for Power Applications

Magnetostatics: magnetic circuits, mmf, flux, reluctance, magnetic flux density, magnetic field intensity, permeability, Ampere’s law, concepts of leakage, fringing and saturation.

Electromagnetics: flux-linkage, inductance, Faraday’s law, induced voltage, magnetic energy and force.

Magnetic materials: saturation, BH loops, iron loss (eddy-current, hysteresis), permanent magnets.

Transformers: ideal transformers, back-emf equation, practical transformers (construction, equivalent circuit, analysis).

4. Electrical Machines

Energy conversion principles: induced voltage, magnetic force, stored energy, representation of energy transformation using voltage sources.

DC machines: applications, construction, principles, equivalent circuits, performance prediction

Rotating magnetic fields: synchronous speed, poles, induced voltage equation

Induction machines: applications, construction, principles, equivalent circuits, performance prediction

Synchronous machines: applications, construction, principles, equivalent circuits, performance prediction

Variable-speed drives concepts (inverters, operating range, voltage-frequency control).

5. Introduction to Electric Power Systems

Per-unit analysis: principles, base quantities, conversion, analysis.

Transmission lines: physical construction, transposition, modelling, nominal pi equivalent circuit, surge impedance loading, use of multiple phase conductors.

Power system control: real and reactive power flow for lossless inductive line, reactive power control (effect on voltage, generators, synchronous compensators, static compensators), real power control (effect on frequency, generators).

Power quality concepts: problems (failure, power-factor, harmonics, EMI) and solutions.

Graduate Attributes

GA1 An advanced level of knowledge and understanding of the theory and practice of Electrical and Electronic, Computer Systems or IT&T Engineering and the fundamentals of science and mathematics that underpin these disciplines.

GA3 The ability to apply knowledge in a systematic and creative fashion to the solution of practical problems.

GA4 A commitment to the ethical practice of engineering and the ability to practice in a responsible manner that is sensitive to social, cultural, global, legal, professional and environmental issues.

GA6 An ability to work effectively both independently and cooperatively as a leader, manager or team member with multi-disciplinary or multi-cultural teams.

GA7 An ability to identify, formalise, model and analyse problems.

GA8 The capacities to design, optimise, implement, test and evaluate solutions.

GA9 An ability to plan, manage and implement solutions that balance considerations of economy, quality, timeliness and reliability as well as social, legal and environmental issues.

GA10 Personal attributes including: perseverance in the face of difficulties; initiative in identifying problems or opportunities; resourcefulness in seeking solutions; and a capacity for critical thought.

GA11 Skills in the use of advanced technology, including an ability to build software to study and solve a range of problems.

GA13 An ability to utilise a systems approach to design and operational performance.

GA14 Understanding of the principles of sustainable design and development.

These programs also foster the graduate attributes of the University of Adelaide and the Institution of Engineers Australia. These should be read in conjunction with the list above.