ELEC3305  POWER & MACHINES

SECOND SEMESTER 2008

This outline is distributed in the lecture, but is also obtainable from the unit webpage:  http://student.ee.uwa.edu.au/units/elec3305/

Prerequisites: ELEC1302 Power and Machine Technologies  or  ELEC2302 Electromagnetics and Electromechanics

Objectives and Outcomes

Objectives:

To study the principles and performances of direct current (dc) machines and alternating current (ac) synchronous machines and to study the structure and analysis methods of power systems, the parameters and models of power transmission lines and the modes of power transmission line operation.

Generic Outcomes:

The unit is designed to teach the following generic attributes:

·         An ability to apply knowledge of basic science and engineering fundamentals

·         In-depth technical competence in at least one engineering discipline (rotating machines and power systems)

·         An ability to undertake problem identification, formulation and solution

·         An ability to adapt acquired knowledge to new situations

·         An expectation of the need to undertake lifelong learning, and capacity to do so

Technical Outcomes

The unit is designed to teach most of the following technical outcomes:

·         Understand the principles and characteristics of the operation of dc generators and motors, ac synchronous generators and motors.

·         Understand machine windings and master methods of machine analysis and performance evaluations.

·         Understand basic speed control of dc motors and applications of synchronous motors

·         Understand the structure of power systems.

·         Master the basic concepts of power transmission and techniques in power transmission analysis

·         Master the methods of evaluating power line parameters and the models of transmission lines.

·         Understand the different modes of operation of transmission lines in power systems

The formation of the outcomes given above can be traced through the lectures, worked examples, tutorials and laboratory classes of the unit.  The examples and tutorials will consolidate the technical materials learned and provide assistance to students to establish the skill of problem solving and to apply learned knowledge to different problems.  The laboratory sessions will provide students the opportunity to verify the knowledge learned in lectures and to expand it through the experiments.  This helps students to carry out investigations by themselves.  Collectively lectures, tutorials and laboratory sessions assist students to develop life-long learning skill.

Unit Content

This unit deals with the following topics:

1.      Review of Power and Power Quality Concepts (week one):

Active power, reactive power, apparent power, LR and CR loads, 3 phase circuits, wye and delta connections.

2.      Direct-current Machines (weeks two & three):

Magnetic field excitation, armature windings, torque relations, equivalent circuit, motor performance, armature reaction and commutation.

3.      Permanent Magnet Machines (week four):

Magnetic circuit, torque relations, motor performance, brushless dc and ac motors.

4.      Synchronous Machines (weeks five & six):

Equivalent circuit, steady-state performance, excitation control, steady-state operating limit, synchronous motor power factor, synchronous machine modelling, phase-variable model, direct- and quadrature-axis model, speed control.

5.      Power system structure (week seven):

Multi-voltage levels, transmission, sub-transmission and distribution systems

6.      Analysis techniques and power relationships (week eight):

Per-unit notation, loop and nodal analysis, power relationships for four-terminal network

7.      Transmission line models and modes of operation (weeks nine - eleven):

Lumped-parameter transmission line models, distributed-parameter model

8.      Transmission line parameter evaluations (weeks twelve & thirteen):

Parameter determination for multi-conductor line models, multi-conductor modelling, earth-path elimination, symmetrical components, sequence impedances and admittances

Instructional Contact

Contact Hours:

Lectures: 36 hrs           Monday:  10:00am to 10:45am 

                                  Tuesday:  11:00am to 11:45am

                                  Wednesday:  1:00pm to 1:45pm.

Tutorials: 12 hrs          

Labs: 4 x 3 hrs            Sign up for sessions and venues on OLCR.

See up-to-date times and venues for “ELEC3305 Power & Machines” at:  http://www.timetable.uwa.edu.au/

Lecturer and Tutorials on Rotating Machines: Dr. Herbert Iu

Email:  herbert@ee.uwa.edu.au                       Tel:  6488 7989

Unit Coordinator Lecturer and Tutorials on Power Systems: Associate Professor Tam Nguyen

Email:  tam@ee.uwa.edu.au                Tel:  6488 2559

Laboratory Demonstrators:

When emailing instructors, please indicate the unit code (ELEC3305) and your full name with your family name CAPITALIZED.

Study Materials

Required Textbooks (Lectures, Laboratories, Tutorials and Examinations will be based on the assumption that students have a copy of these materials, and any material distributed in the class or on the website):

Chapman, S.J.  Electric Machinery and Power System Fundamentals,  McGraw-Hill 2002

Lecture Notes on Rotating Machines (can be purchased at cost price from the School of Electrical and Electronic Engineering)

Lecture Notes on Power Systems (will be distributed in the lectures).

Textbook Chapters Covered:

Students are expected to have an understanding of the material in chapters 1, 2 and 3 prior to starting this unit.

In the first half of this unit (28-July to 05-September), we will cover the material in chapters 4, 5, 6,  and 8, and additional material included in the lecture notes and supplied by the lecturer.

In the second half of this unit (08-September to 31-October), we will cover the material in chapters 9, 10, and 11, and the lecturer will provide additional material.

Recommended Additional Reading:

Chapman, S.J.  Electric Machinery Fundamentals, 4^th Ed.  McGraw-Hill 2004 

Fitzgerald, A.E., Kingsley, Jr., C and Umans, S.D.  Electric Machinery, 5^th Ed.  McGraw-Hill 1990

Slemon G.R. and Straughem, A.  Electric Machines, Addison-Wesley 1980

Sarma, M.S.  Electric Machines, 2^nd Ed. West 1994

Slemon, G.R.  Electric Machines and Drives, Addison-Wesley 1992

Sen, P.C.  Principles of Electric Machines and Power Electronics, 2^nd Ed., Wiley 1997

Hanselman, D.  Brushless Permanent Magnet Motor Design 2nd Ed.  The Writer’s Collective, Rhode Island, USA 2003

Wildi, T. Electrical Machines, Drives and Power Systems, 5th Ed. Prentice Hall 2002

Glover, J.B. and Sarma, M.S.  Power System Analysis and Design, PWS Publishers, 2^nd Ed., 1994

Weedy, B.M. and Cory B.J.  Electric Power Systems, 4^th Ed., Wiley 1998

Grainger, J.J. and Stevenson, Jr, W.D.  Power System Analysis,  McGraw-Hill 1994

The following websites may have material to assist understanding of the unit:

Links from the textbook website:  http://www.mhhe.com/engcs/electrical/chapman/fundamentals/links.mhtml

Motor engineers:  http://www.achargreaves.com.au/

Brushless motors:  http://www.ecycle.com/motorgenerator/default.htm    http://www.goldenmotor.com/

Electric Drive Transportation Association:   http://www.electricdrive.org/

C.S.Indulkar webpage:  http://www.geocities.com/cindulkar/

Unit Assessment

Students can demonstrate their achievement of the generic attributes and learned skills as follows.

Assessment Percentages:

Laboratory participation                                  4%  (4 x 1%)

Machines Labs Report                                     15%

Power Labs Report                                          15%

Final Examination; Machines part                    33%

Final Examination; Power Systems part           33%

Each portion of the assessment as listed above (except lab participation) will be normalized individually so that the average falls between 65% and 70%.  Students may refer to the Faculty of Engineering, Computing and Mathematics policy on assessment which is available by flowing the link on the unit webpage.

Laboratories:

Attendance is compulsory, and each student must acquire experimental results (generally together with a partner) for credit in each lab.  Lab assessment may include pre-lab work or lab quizzes for assessment.  Each student must individually submit a formal written lab report on the machines labs, which will be due on Monday 22-September-2008 at 1pm.  Each student must individually submit a formal written lab report on the power labs which will be due on Friday 31 October 2008 at 4 pm.  The report format will be provided by the individual lecturers or the lab demonstrator.

Penalties:

Failure to attend a scheduled laboratory session will attract a mark of zero for that laboratory session.  Late submissions will be penalized by having 10% taken off for each period of 24 hours of part thereof by which they are overdue. 

Final Examination:

This will give students the opportunity to demonstrate their understanding and mastery of the course materials.  The Final Examination will be held during the normal University examination period.  Students are informed that only approved calculators will be permitted in examinations or tests in this unit, and that it would be advisable that the calculator have the capability to process complex numbers.

Tutorials:

Tutorial attendance will be taken.  A student’s attendance record at tutorials may be used to assist in the interpretation of assessment results, especially for borderline cases.

Warning on Plagiarism and Collusion:

The Faculty of Engineering, Computing and Mathematics policy on plagiarism and collusion will be followed, which is available by following the link on the unit webpage.  In cases where the lecturer believes that inappropriate plagiarism or collusion has occurred in a submission by a student, those determined to be responsible for the inappropriate plagiarism or collusion will receive a mark of zero for that portion of assessment for which the submission was made.  This does not preclude the implementation of any provisions of Faculty policies.

Appeals

Students should be aware of the Faculty of Engineering, Computing and Mathematics policy on appeals, which is available by following the link on the unit webpage. 

Supplementary assessment is not available in this unit except in the case of a bachelor’s pass degree student who has obtained a mark of 45 to 49 and is currently enrolled in this unit, and it is the only remaining unit that the student must pass in order to complete their course.

Faculty Policies

Unit marks may be scaled in line with the Faculty’s Policy on Assessment Practices and Procedures.

See Faculty Policy on Assessment Practices and Procedures at http://www.ecm.uwa.edu.au/for/students/assess

See the University Guidelines on Academic Misconduct at http://www.ecm.uwa.edu.au/for/students/plagiarism

See Faculty Policy on Appeals at http://www.ecm.uwa.edu.au/for/students/exams

See the Charter of Student Rights at http://www.secretariat.uwa.edu.au/home/policies/charter

The University of Western Australia

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