University of Malta

Study-Unit Description
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TITLE Introduction to Electrical Energy System

LEVEL 01 - Year 1 in Modular Undergraduate Course


DEPARTMENT Industrial Electrical Power Conversion

DESCRIPTION This study-unit covers the following topics:

- Electrical Energy and its Generation: Introduction to Electric Power systems; Introduction to Maltese Power System; Electricity Demand; Generating Plants; Alternative Energy Generation.

- Three Phase Systems: Advantages of 3–phase systems; Three-wire and four-wire electrical systems with balanced and unbalanced loads; Electrical Power Measurement in 3–phase systems.

- The Synchronous Generator; Construction of 3–phase synchronous generators; Operation of the synchronous generator on the grid.

- Transmission and Distribution Media: Types of Overhead Lines; Short Line Model; Voltage Regulation; Types of Underground Cables; Approximate Cable Model; Ferranti Effect.

- Three phase transformer as a Power System component: Purpose of transformers in power systems, Simplified equivalent circuit including phasor diagram, Referral of parameters between sides, losses, open circuit and short circuit tests, Three phase connections and phase shifts, construction, Buckholtz relay, Voltage regulation.

Study-unit Aims:

To develop an understanding of Electrical Power Systems: Generation, Transmission and Distribution Systems.

Learning Outcomes:

1. Knowledge & Understanding:

By the end of the study-unit the student will be able to:
- Understand fundamental principles of generating plant.
- Explain how power measurement can be done in 3-wire and 4-wire 3-phase systems.
- Understand principle of operation of dc and ac generators.
- Describe construction of 3-phase synchronous generators and understand their operation with grid.
- Understand characteristics of overhead lines and underground cables and how these can be modelled.
- Explain the operation of a three phase transformer and its physical construction
- Model a transformer and explain the associated losses
- Describe the various configurations of three phase units and the corresponding phase shifts.

2. Skills:

By the end of the study-unit the student will be able to:
- Select most suitable type of generating plant to meet base and peak loads.
- Perform calculations relating to power measurements in 3-phase systems with balanced or unbalanced loads.
- Perform calculations relating to supply of real and reactive power to grid by 3-phase synchronous generators.
- Perform calculations based on basic models of power lines and cables and compute voltage regulation.
- Determine the performance of a transformer using the simplified transformer model.
- Choose the type, connection and phase shift of a three phase transformer for a given application
- Calculate the voltage regulation for different loads.

ADDITIONAL NOTES Pre-requisite Study-unit: EPC1101

STUDY-UNIT TYPE Lecture, Practicum & Tutorial

Assessment Component/s Resit Availability Weighting
Practical No 15%
Examination (2 Hours) Yes 85%

LECTURER/S John Licari
Reiko Raute

The University makes every effort to ensure that the published Courses Plans, Programmes of Study and Study-Unit information are complete and up-to-date at the time of publication. The University reserves the right to make changes in case errors are detected after publication.
The availability of optional units may be subject to timetabling constraints.
Units not attracting a sufficient number of registrations may be withdrawn without notice.
It should be noted that all the information in the study-unit description above applies to the academic year 2017/8, if study-unit is available during this academic year, and may be subject to change in subsequent years.

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