Course Description

With the ever-increasing need to dispatch electric energy to growing loads, existing distribution systems grow and expand. As well, new networks are constructed in the new developing residential, industrial and agricultural areas. Thus, large investments are spent to construct a distribution system, such that in typical power systems, 40% of the investments are spent in the distribution system which is double the investment in the transmission system (20%) and as much as the investment in the generation plants (40%). In addition, the consumers are now progressively interested in power quality and an uninterrupted supply, i.e. a reliable distribution system is required.

Therefore, system engineers in the Power Utilities progressively give every care to the distribution system operation, testing and protection.

Course Goal:

To enhance the delegate knowledge, skills, and abilities necessary for properly and efficiently operating and protecting a power system, with the objective of keeping the system almost free from supply disturbances and system troubles.

Course Objectives:

By the end of this course the participant will be able to:

1. Understand electric power distribution systems.
2. Set principles common to all types of distribution systems.
3. Classify distribution systems according
4. Be familiar with principle of operation, construction and performance indices of main components of distribution systems:
5. Be familiar with protective equipment of distribution systems.
6. Be familiar with procedures of distribution system protection
7. Be familiar with testing procedures of different components of distribution systems.
8. Be familiar with common failures of main components of distribution systems.

Course Outline:

• General Introduction to Electric Power Distribution Systems.
• Design Principles Common to all types of Distribution Systems.
• Classification of Distribution Systems According to:

• 1. Voltage Level.
  2. Configuration.
  3. Degree of Automation.
  4. Required degree of Supply Continuity.

• Principle of Operation, Construction and Performance Indices of main Components of Distribution Systems:

• 1. Distribution Substation.
  2. Primary Distribution Systems (Overhead and/or Underground): Supply Feeders, Distribution Centers (Distributors), Distribution Feeders and Laterals.
  3. Distribution Transformers.
  4. Secondary Distribution Systems: Main and Sub-main Distribution Switchboards, Distribution Networks

• Protective Equipment of Distribution Systems:

• 1.  Protective Relays.
  2. Automatic Circuit Breakers.
  3. Fuses.
  4. Load-Break Switches and Ring-main Units.

• Distribution System Protection:

• 1. Distribution Substation Protection.
  2. Primary Distribution System Protection.
  3. Secondary Distribution System Protection.
  4. Coordination of Protective Systems of Primary and Secondary Distribution Systems.

• Supervision, Tele-metering and Tele-control in Distribution Systems.
• Testing Procedures of Different Components of Distribution Systems.
• Common Failures of Main Components of Distribution Systems.
• Fault Location on Overhead and Underground Feeders and Distributors.
• Conclusion

Who Can Benefit?

In general, electrical power engineers, supervisors and qualified distribution system technicians can take part in this course.