Objectives
• Understand the various types of fault currents• Determine the causes
Course Details
Objectives
• Understand the various types of fault currents • Determine the causes of overcurrent and short circuit current • Explain differences between power system faults • Analyse the common faults in a power system • Configure multifunction relays to protect the power system • Know protection simulation • Know the partial discharge analysis and detection as case study
Outline
Introduction to Fault Analysis • Source of fault current in an electrical installation • Common fault statistics of electrical equipment • Short-circuit rating of equipment • Selecting the correct switchgear rating for fault duties • Overview of per-unit system and one-line diagrams • Sources of impedance data for all items of plant
Power System Faults • Power system faults • Faults calculation and using software for verification • Partial discharge analysis • Cables subjected to short-circuit currents • Surge and lighting faults • Grounding system to increase power system reliabilities
Power Systems Faults due to Nonlinear Loads • Overview of symmetrical components and faults • Consideration of various fault types • Linear loads and nonlinear loads • Harmonic analysis • K factor in transformers • Power factor correction
Protection System • Short circuit current calculation • Protection relays according the IEC standards • High set, low set, and inverse -timed elements • Co-ordination with other devices and fuses • Auto-reclosing of feeder circuit breakers • Various types of overcurrent relays
Simulation, Computer Calculations and Analysis Techniques • Simulation for GE advanced relay (Practical Session) • Power system relays • ANSI code • Different method to reduce the faults in power system • Using software for fault calculation and analysis • Failure mode effective analysis FMEA explanation