Power System Protection

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  • Fees : 2900 $
  • Date 10 Feb 2019
  • Location Abu Dhabi, English


Modern Power System Protection




Electric power systems are designed to serve loads in a safe and reliable manner. One of the major considerations in the design of any power network is adequate control of short-circuits or “faults” as they are generally referred to. If faults are not controlled they can cause unnecessary loss of electricity service with all of its many ramifications and damage to equipment. Faults on system elements are removed from networks by means of equipment referred to as “Power System Protection”.

This course is designed to give delegates a broad understanding of the nature of power network faults and the principles of Protection System Protection, Design, Operation and Maintenance. 





On completion of the course the trainee(s) will be competent in:

  • The skills involved and the principles applied to modern power system protection
  • Interpreting system faults from protection system alarms and indications and determine the necessary corrective actions
  • Information and instruction in safe operating procedures in electrical protection schemes, including elements of maintenance of HV and LV protection relay systems. 



Who Should Attend?


Engineers and Technicians from Electrical Transmission and Distribution Utilities or Major Consumers with Power Distribution Networks, such as those for oil and gas production, who are directly involved in the design, specification, purchasing, maintenance or day to day Operation of System Protection.

It is also of great benefit to personnel who require a broad understanding of power system protection due to their employment in related activities, e.g. government agencies, loan agencies etc.

Design, Marketing and Project Management Personnel from manufacturers of power system protection equipment should also benefit greatly from the seminar.

Personnel should ideally have at least two years experience related to the electrical power industry.




  1. Introduction and General Philosophies





    1. Introduction
    2. Classification of Relays
    3. Protective Relaying Systems and Their Design
    4. Applying Protective Relays



  1. Relays and Application Data
  2. Circuit-Breaker Relays
  3. Comparison of Symbols


2. Technical Tools of the Relay Engineer: Phasors, Polarity, and Symmetrical Components

  1. Introduction
  2. Phasors
  3. Polarity in Relay Circuits
  4. Faults on Power System
  5. Symmetrical Components
  6. Symmetrical Components and Relaying


3. Instrument Transformers for Relaying

  1. Introduction
  2. Current Transformers
  3. Equivalent Circuit
  4. Estimation of Current Transformer Performance
  5. European Practice
  6. Direct Current Saturation
  7. Residual Flux
  8. MOCT
  9. Voltage Transformers and Coupling Capacitance Voltage Transformers
  10. Neutral Inversion


4Microprocessor Relaying Fundamentals

  1. Introduction
  2. Sampling Problems
  3. Aliasing
  4. How to Overcome Aliasing
  5. Choice of Measurement Principle
  6. Self-Testing


5. System Grounding and Protective Relaying

  1. Introduction
  2. Ungrounded Systems
  3. Reactance Grounding
  4. Resistance Grounding
  5. Sensitive Ground Relaying
  6. Ground Fault Protection for Three-Phase, Four-Wire Systems



6. Generator Protection

  1. Introduction
  2. Choice of Technology
  3. Phase Fault Detection
  4. Stator Ground Fault Protection
  5. Backup Protection
  6. Overload Protection
  7. Volts Per Hertz Protection
  8. Over speed Protection
  9. Loss-of-Excitation Protection
  10. Protection Against Generator Motoring
  11. Field Ground Detection
  12. Recommended Protection


7. Transformer and Reactor Protection

  1. Introduction
  2. Magnetizing Inrush
  3. Differential Relaying for Transformer Protection
  4. Sample Checks for Applying Transformer Differential Relays
  5. Typical Application of Transformer Protection
  6. Protection of Phase-Angle Regulations and Voltage Regulators
  7. Protection of Shunt Reactors


8. Station-Bus Protection

  1. Introduction
  2. The Linear Coupler Differential System
  3. Multi-restraint Differential System
  4. Bus Differential Relaying with Over current Relays
  5. High-Impedance Differential System
  6. Serving Example for the Kab Bus Protection
  7. Bus Differential Relaying with a Moderately High-Impedance Relay Type Rydss, Radss, or Reb-100
  8. Protecting a Bus that Includes a Transformer Bank
  9. Protecting a Double-Bus Single Breaker with Bus Tie Arrangement
  10. Other Bus Protective Schemes


9. Line and Circuit Protection

  1. Introduction
  2. Over-current Phase- and Ground-Fault Protection
9.3            Directional Over-current Phase- and Ground-Fault Protection
9.4            Distance Phase and Ground Protection
  1. Loop-System Protection
  2. Short-Line Protection
  3. Series-Capacitor Compensated-Line Protection
  4. Distribution Feeder Protection

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