MODULE DETAILS

Module 2:     Electrical Power Distribution

Nominal duration: 6 weeks (72 hours total time commitment)

This time commitment includes the preparation reading, attendance at each webinar (1 hour plus 15-30 minutes for discussion), and the time necessary to complete the assignments and further study.

MODULE PURPOSE

This is a practical module in power distribution, focusing on medium voltage (1kV-36kV) power considerations, switchgear, and network studies. It provides technical know-how in these areas that are typically not covered by university or college programs.

ASSESSMENT STRATEGY

To evaluate the achievement of the learning outcomes; written assignments, group projects and practical exercises are set.

SUMMARY OF LEARNING OUTCOMES

1.    Discuss the basic concepts of ac electrical power

2.    Examine and discuss the fundamentals of power distribution in the mining industry

3.    Discuss power transformers and power factor compensation in mining distribution systems

4.    Explain the construction and selection of cables and accessories used in the mining industry

5.    Examine the concepts and role of earthing in the mining industry

6.    Discuss the application of diesel engine generators for power supply in mines



Learning Outcome 1

Discuss the basic concepts of ac electrical power

Assessment Criteria

1.1

Examine the concepts of (a) single and 3 phase ac supply and (b) the star/delta connections used in 3 phase

1.2

Calculate (a) active power, (b) reactive power and (c) power factor and apply the concepts to power factor improvement

1.3

Explain (a) the meaning of power quality and (b) the adverse impact of transients, harmonics and other quality problems on the equipment


Learning Outcome 2

Examine and discuss the fundamentals of power distribution in the mining industry

Assessment Criteria

2.1

Examine the fundamental principles of power distribution

2.2

Describe the elements of a power distribution network

2.3

Discuss basic design considerations for power distribution networks including voltage selection

2.4

Describe the equipment used in modern power networks

2.5

Examine and discuss the application of software for system design, including short-circuit calculations


Learning Outcome 3

Discuss power transformers and power factor compensation in mining distribution systems

Assessment Criteria

3.1

Examine the ratings, design and selection of power transformers in mining applications

3.2

Describe (a) power factor compensation equipment and (b) solutions for transients and harmonic resonance caused by these equipment


Learning Outcome 4

Explain the construction and the selection of cables and accessories used in the mining industry

Assessment Criteria

4.1

Discuss (a) the construction of a typical MV or LV cable and (b) the functions of each component

4.2

Explain the principle involved in cable sizing

4.3

Examine (a) the special requirements of mining cables and (b) the design features addressing these requirements

4.4

Describe commonly used cable accessories including cable couplers for supply to mobile equipment

Learning Outcome 5

Examine the concepts and role of earthing in the mining industry

Assessment Criteria

5.1

Discuss (a) the need for earthing the supply systems and (b) the methods used

5.2

Explain (a) the concept of protective earthing and (b) its importance to safety

5.3

Examine (a) hazards posed by static electricity and (b) the role of bonding in controlling these hazards

5.4

Describe the role of earthing in lightning protection

5.5

Discuss the principle of earth resistivity and its application to earth electrodes

Learning Outcome 6

Discuss the application of diesel engine generators for power supply in mines

Assessment Criteria

6.1

Examine (a) the power supply alternatives for mines and (b) the use of on-site diesel engine generators

6.2

Describe the principle and construction of a typical diesel engine for power generation

6.3

Discuss the arrangement of a packaged DG set and the support facilities for its operation

Delivery mode

A combination of asynchronous and synchronous e-learning delivery comprising a judicious mix of interactive online web conferencing, simulation (virtual labs) software, remote online labs, online videos, PowerPoint slides, notes, reading and study materials (in PDF, HTML and Word format) accessed through the Moodle Learning Management System (LMS).

Software/Hardware Used

Software

  • Excel

Hardware

  •  N/A