MODULE DETAILS

 

Module 21: Practical Power Distribution for Engineers and Technicians

 

Nominal duration: 4 weeks (48 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 module covers the ability to select, maintain, protect and analyse power distribution networks for industrial control applications.

 

PRE-REQUISITES MODULE, UNITS /

 

CO-REQUISITES

 

Module 20

 

ASSESSMENT STRATEGY

 

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

 

SUMMARY OF LEARNING OUTCOMES

 

1. Examine power distribution fundamentals

 

2. Perform short circuit current calculations

 

3. Select medium voltage switchgear

 

4. Select power cables

 

5. Examine and discuss the basics of power transformers

 

6. Examine compensation and power factor correction

 

7. Examine and explain correct earthing procedures

 

8. Perform distribution-related simulations

 

Learning Outcome 1

 

Examine power distribution fundamentals

 

Assessment Criteria

 

1.1

 

Outline the basic design considerations for power distribution networks

 

 

1.2

 

Outline methods of voltage improvement

 

 

1.3

 

Examine the equipment used in power networks

 

 

 

Learning Outcome 2

 

Perform short circuit current calculations

 

Assessment Criteria

 

2.1

 

Examine common fault current scenarios

 

 

2.2

 

Examine basic short-circuit current calculations

 

 

2.3

 

Outline the assumptions and restraints implicit in simplified fault current calculations

 

Learning Outcome 3

 

Select medium voltage switchgear

 

Assessment Criteria

 

3.1

 

Examine the fundamental switchgear parameters

 

 

3.2

 

Examine the operating characteristics of the following MV switchgear:

 

(a) Switches

 

(b) Isolators/disconnectors

 

(c) Circuit breakers

 

 

3.3

 

Compare the advantages and disadvantages of the following types of switchgear insulation:

 

(a) Oil

 

(b) Air break

 

(c) Sulphur-Hexaflouride (SF6) (d) Vacuum

 

 

3.4

 

Select appropriate switchgear for specific applications

 

 

3.5

 

Examine the basics of modern protection relays

 

Learning Outcome 4

 

Select power cables

 

Assessment Criteria

 

4.1

 

Examine the applications for different types of cable insulation

 

 

4.2

 

Select the most appropriate cable

 

 

4.3

 

Examine cable losses and voltage drop

 

 

4.4

 

Examine cable short-circuit and earth fault ratings

 

 

 

 

4.5

 

Examine environmental issues for cable installations

 

 

4.6

 

Examine issues related to: (a) Transportation

(b) Handling

 

(c) Installation of power cables

 

Learning Outcome 5

 

Examine and discuss the basics of power transformers

 

Assessment Criteria

 

5.1

 

Examine the methods of transformer winding connection

 

 

5.2

 

Examine the methods of earthing transformer neutrals

 

 

5.3

 

Compare the different methods of transformer cooling

 

 

5.4

 

Examine the types of transformer faults and their causes

 

 

5.5

 

Select the appropriate method of protecting the power transformer

 

Learning Outcome 6

 

Examine compensation and Power Factor Correction

 

Assessment Criteria

 

6.1

 

Examine the concept of Power Factor

 

 

6.2

 

Outline the causes and effects of low Power Factor

 

 

6.3

 

Compare the following methods used to improve

Power Factor:

 

(a) Shunt and series capacitors

 

(b) Shunt reactors

 

(c) Synchronous compensators

 

(d) Static VAR compensators

 

(e) Thyristor switched shunt capacitors

 

(f) Thyristor switched shunt reactors

 

 

 

 

6.4

 

Examine the practical consequences and economic benefits of PFC

 

Learning Outcome 7

 

Examine and explain correct earthing procedures

 

Assessment Criteria

 

7.1

 

Examine the overall philosophy of grounding/earthing of equipment and structures

 

 

7.2

 

Examine electrical safety earthing principles

 

 

7.3

 

Compare lightning and transient surge current mitigation techniques

 

 

7.4

 

Examine proper earthing of the power distribution network

 

 

7.5

 

Examine the effects of ground resistance of earthing systems

 

Learning Outcome 8

 

Perform distribution-related simulations

 

Assessment Criteria

 

8.1

 

Perform the following simulations: (a) Load flow studies

(b) Transformer and feeder cable sizing

 

(c) Fault current studies

 

(d) Motor starting current determination

 

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