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Setting and Simulation of Overcurrent Relays Using PowerFactory software

Introduction :
Power system consists typically of generators, transformers, transmission lines, ‎busbars, and utility equipment. All of these can be represented by equivalent circuits. ‎They consist of current carrying parts and insulating parts. Insulation provides ‎separation and it is the weakest link. About 80 % of the electrical faults occur due to ‎failure of insulation system.‎ The capital investment involved in a power system is so great that proper precautions ‎must be taken to ensure that the equipment not only operates as efficient as possible ‎but also protected from accidents.‎ Faults in power systems may be caused by physical accidents, weather conditions, or ‎aging of the insulation, etc. If a fault occurs the enormous energy of the power system ‎may cause extensive damage to equipment, severe drop in voltage and loss of lives. ‎Hence, the power system must be protected against such faults. This is carried out by ‎equipment known collectively as protection system. ‎

The main objective of this course is to introduce to the participants the components of a ‎protection system, different types of protection relays and how these relays can be set ‎to protect different parts of the power system.‎ The different schemes of power system protection will all be covered including overcurrent, directional, differential, and distance protection schemes.

Course Objectives :
Providing the participants ‎ with skills to perform fault analysis of power system networks.‎ Enabling participants to understand the basic components of a protection system.‎ Introducing to participants ‎ the principle of operation of different types of relays.‎ Providing the participants with the skills ‎necessary ‎ to carry out relay co-ordination analysis for variety of protection schemes.‎ Enabling the participants to design protection schemes to be applied for certain components of power system. ‎ Enabling participants to appreciate the modern advances in protection systems. Introducing to participants the new role of microprocessor relays in power system automation.‎ Acquainting the participants with tools to enable them to use power system analysis softwares.

Who Should Attend :
The short course is targeted at senior electrical engineers, and practicing electrical engineers who are involved in the area of electrical power system protection or its relevant disciplines. However, the course should also be of interest to other electrical engineers who wish to develop their knowledge on power system protection and its principles. The course is also important for academic instructors and trainers who are involved in teaching power system protection. Additionally, the course is very well designed to suit also consultants who are involved in carrying out protection grading studies for small or large power systems.

Course Modules and Topics :
This is a basic skeleton of the course contents. Participants will be given detailed notes and will be trained on using DIgSILENT PowerFactory in modelling and simulation of protection devices.
Module 1: Introduction and Background.
This module contains Components of Power System, System Running Condition, Aim of Protection, Fault Statistics, Protection Zones, Requirements of a Good Relay, Protection System Components, Time of Action, Calculation of Fault Currents, Modelling of Power System During Faults, and Power System Grounding. This module contains more than 6 examples and exercises.

Module 2: Protection System Components.
This module contains Protection Transformers, Current Transformers, Current Transformer Errors, Methods of Assessment of Current Transformer Errors, Voltage Transformers, Capacitor Voltage Transformers, Fuses, High Rupturing Capacity (HRC) Fuse, Fusing Factor, Circuit Breakers, AC Circuit Breakers, Air Circuit Breakers, SF6 Circuit Breakers, Oil Circuit Breakers, Vacuum Circuit Breakers, DC Circuit Breaking, DC Commutation Methods, DC Circuit Breakers, and Future Trend of Circuit Breakers. This module contains more than 10 examples and exercises.

Module 3: Protection Relays‎.
This module contains Classification of Protection Relays, Electromagnetic Relays, Static Relays, Digital Relays, Numerical Relays, Applications of Relays, Single Quantity Relays, Two Input Relays, Differential Relays, Ratio or Percentage Differential Relays, Percentage Differential Relay, and Impedance or Distance Relays.

Module 4: Protection Schemes.
This module contains Over Current Protection, Protection Grading, Directional Over Current Protection, Over Current Earth Fault Protection, Differential Protection, Distance Protection, Zones of Protection and Time Grading, Types of Distance Relays, and Fault Resistance. This module contains more than 5 examples and exercises.

Module 5: Protection of Transmission Lines.
This module contains Over Current Protection, Overcurrent Earth Fault Protection, Distance Protection, and Pilot Protection. This module contains more than 6 examples and exercises.

Module 6: Protection of Plants.
This module contains Generator Protection including Differential Protection, Overcurrent and Earth Fault Protection, Negative Phase Sequence Protection, Turn To Turn Stator Protection, Loss of Excitation Protection, Reverse Power Protection, Over Frequency and Under Frequency Protection, Over Voltage Protection, Thermal Protection, and Over Speed Protection. Transformer Protection including Over Current Protection, Differential Protection, Buchholz Relay, Coolant Level Protection, and Over Temperature Protection. Motor Protection including Mechanical Overloading Protection, Short Circuit Protection, Earth Faults Protection, Stalling Protection, Single Phasing Protection, Winding Temperature Protection, and Under Voltage Protection. Cable Protection. This module contains more than 6 examples and exercises.

Computer Applications :
DIgSILENT Power Factory simulation and analysis software will be used extensively during the course. This software is the leading high-end tool for applications in generation, transmission, distribution and industrial systems. It integrates smoothly into any GIS, DMS or EMS supporting open system standards and enables the user to carry out balanced and unbalanced power flow. It has many features including fault analysis, harmonics, frequency scans, stability, EMT simulations, protection simulation and co-ordination, reliability, Maintenance Schedules, static and dynamic voltage stability, power dispatch, state estimation, optimal capacitor placement, cable sizing, built-in automation interface, interfaces for GIS and SCADA integration, and PSS/E compatibility. Trainees will have hands on experience with the software and will be solving exercises using PowerFactory. All protection schemes including Overcurrent, Directional, Differential, and Distance protection schemes will be modelled and simulated using the software.

Course Instructor :
Graduated with First Class Honours B.Eng. degree in Electrical and Electronic Engineering from University of Manchester, UK in 1994. He received his MBA degree from Edinburgh Business School, UK, in 1998. He then completed his M.Sc. in Electrical Power Engineering from University of Manchester Institute for Science and Technology (UMIST), UK in 1999. He completed his Ph.D. degree in Electrical Engineering from University of Manchester, UK in 2001. He worked for 12 years in oil and gas industry in major companies including Petroleum Development Oman and Shell UK as Senior Project Manager. He then joined Sultan Qaboos University in August 2002 as faculty member in the Department of Electrical and Computer Engineering. In addition to his academic duties, in the department, he was appointed as the Assistant Dean for Industrial Training and Alumni in the College of Engineering in 2006. In 2010 he was appointed as the Dean of Oman Maritime College. He has founded a number of successful companies to serve the needs of power system in Oman and the GCC region. He is currently the chairman of Albanah Group of Companies delivering a wide range of products and services including power system simulation softwares, hardwares, consultancies and technical and managerial training. His areas of interest include Power System Modelling and Simulation, Power System Protection, High Voltage Engineering, Privatization of Electrical Supply Industry, and Project Management. He has extensive experience in delivering training courses to senior managers and experienced engineers in public and privates sectors' organisations in the areas of Project Management, Power System Protection, and Power System Economics.

Dates and Venue :
The course duration is one week. Dates will announced.
If a client needs the course in-house then arrangements can be made with administration.
Dates will then be mutually agreed.

There are limited seats and attendants will be served on first come first served basis.
All registration details and fees are clearly given in the registration form.
The form can be downloaded from attachments of the links below.
For any query, please do not hesitate to contact us by email.

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