1 Semester

66 hours

Hawthorn, Sarawak

HET225 Electrical Machines

Nil

Credit Points: 12.5 Credit Points

Related Course/s:

A unit of study in the Bachelor of Engineering (Electrical and Electronic Engineering) and Bachelor of Engineering (Electrical and Electronic Engineering)/ Bachelor of Commerce. 

Aims & Objectives:

To introduce students to the fundamentals of Power Systems modelling and analysis.

Teaching Methods:

Lectures (42 hours), tutorials (12 hours) and laboratory work (12 hours)

Assessment:

Assignments (10%), Labs (20%), Tests and Examination (70%)

Generic Skills Outcomes:

• Ability to apply knowledge of basic science and engineering fundamentals
• Ability to communicate effectively, not only with engineers but also with the community at large
• Ability to undertake problem identification, formulation and solution
• Ability to utilize a systems approach to design and operational performance
• Ability to function effectively as an individual and in a multi-disciplinary and multi-cultural teams, with the capacity to be a leader or manager as well as an effective team member
• Understanding of the social, cultural, global and environmental responsibilities of the professional engineer, and the need for sustainable development
• Understanding of the principles of sustainable design and development.
• Understanding of professional and ethical responsibilities and commitment to them
• Expectation of the need to undertake lifelong learning, and capacity to do so

Content:

Revision of Power Concepts

• Active, Reactive and Apparent Power. * Complex Power
• Three-Phase Power Systems. * Star-Delta and delta-star transformations.

Electrical Energy Supply Systems

• Transformer impedance referral
• Per-Unit quantities.
• Introduction to one-line diagrams and impedance diagrams
• Autotransformers.

Transmission Line Modelling

• Transmission line series components 
• Transmission line shunt components
• Transmission line current and voltage relationships
• Increasing-accuracy mathematical models for the Transmission line.

Synchronous Machine

• Construction and principles of operation
• Speed of rotation of mmf pattern and relationship with number of poles and supply frequency
• Equivalent circuit, phasor diagram and internal generated voltage
• Power angle relationship and active power flow
• Motor and generator modes of operation
• Synchronizing to infinite busbar

Three Phase Transformers

• Three-phase transformer connections
• Transformation phase shifts
• Clock-hour figures relationship to phase shift

• Models of power system components
• One-Line diagrams
• Impedance diagrams from one-line diagrams

Loadflow Solutions (time permitting)

• Loadflow data
• Gauss-Siedel method of solution
• Newton-Raphson method of solution
• Outputs obtained from a loadflow study

Textbooks:

Recommended Reading: