By the end of this programme, participants will:
- Learn how to collect and organize data and information necessary for power system fault analysis.
- Understand analytical techniques for studying power systems under various fault conditions.
- Gain knowledge of fault types, their effects, and the calculations involved in short, medium, and long-duration fault phenomena.
- Evaluate the design and functionality of protective equipment in power systems.
- Explore modern software-based methods for analyzing complex commercial and industrial power systems under fault conditions.
- Develop skills to diagnose and troubleshoot electrical faults in power systems.
DAY 1
Introduction to Fault Analysis
- Introductions
- Goals – discussion
- Source of fault current
- Fault statistics
- Basic assumptions
- Short-circuit rating of equipment
- Selecting the correct switchgear rating for fault duties
- Overview of per-unit system
- One-line diagrams
- Sources of impedance data for all items of plant
- Tutorial to demonstrate preparation of a system for study
- Introduction to the engineering software used throughout the course to make complex and repetitive calculations as accurate as possible
DAY 2
Three-Phase Short-Circuit Currents
- Review – summary – discussion
- Manual calculation of three-phase short-circuits current
- Circuit reduction techniques
- Industrial systems
- Electricity supply systems
- Tutorial – based on attendees’ plant
- Cables subjected to short-circuit currents
- Compliance with regulations
DAY 3
Unsymmetrical Fault Conditions
- Review – summary – discussion
- Overview of symmetrical components
- Consideration of various fault types
- Sequence networks
- Consideration of phase shift in two-winding transformers
- Consideration of earth impedance
- Consideration of three-winding transformers
DAY 4
Representation of Unsymmetrical Faults in Power Systems
- Review – summary – discussion
- Fault diagrams
- Interconnected sequence networks
- Special considerations with reference to limitation of earth fault current
- Demonstration examples based on industrial power systems
DAY 5
Computer Based Calculation of Faults
- Review – summary – discussion
- Introduction to a scaled down industrial programme capable to model complex power systems under fault conditions
- Use of the software program in practical studies (checking manual calculations)
- Industrial standards
- Case studies of faults in a high voltage network
- Case study of faults in a low voltage network
