The objective of this course is to discuss the characteristics of different types of faults, and their effects on the power system. Knowledge of this material is vital to understanding the protective schemes that are presented in future courses. After study of this module and the associated workbook, participants should be able to understand the following overall concepts and apply them to their day-to-day work activities. They will also be able to answer related test questions on these subjects: Effect of load impedance on current flow, Effect of short circuit impedance on fault current, Voltage drop through the system under fault conditions, Impedance phase angle, Safety grounding: the ground mat, Neutral grounding: generator or transformer, Delta system grounding transformer, Aerial ground wires on transmission lines, Limitation of ground fault current through impedance grounding, Ungrounded systems - Hazards and ground fault detection, Phasor diagrams for different types of faults, Resonance, Ferroresonance, Distortion of balanced conditions under the various types of faults, Transposition of balanced conditions at generator to unbalanced conditions at the fault, Production of positive, negative, and zero sequence components, Effect of negative and zero sequence components, Zero and negative sequence relays, Rules for study of symmetrical components.
If you are taking this course for NERC credit, the following credits will be reported.
NERC CE HOURS: CE HOURS = 4.00 OPS Topics=4.00 Standards=0.00 Simulation=0.00 EO=0.00
- Trainees will be able to describe the impact of circuit impedance on current flow under normal and fault conditions.
- Trainees will be able to describe resultant current paths for the most common type of faults.
- Trainees will be able to describe various methods of grounding used on power systems, including safety grounding.
- Trainees will be able to describe the effects of different types of grounding.
- Trainees will be able to describe phasor diagrams that represent different fault conditions that can occur on power systems.
- Trainees will be able to describe how voltage levels, current flows and phase angle displacements change under various fault conditions.
- Trainees will be able to describe differences in voltage and current conditions at the generator as compared to those at the fault location.
- Trainees will be able to explain symmetrical components; that is positive, negative and zero sequence components that can be used in phasor diagrams for fault analysis.
SEGMENT A - CONTROL PERFORMANCE StandardsEGMENT B - DISTURBANCE CONTROL StandardsEGMENT C - FREQUENCY RESPONSE StandardsEGMENT D - TIME CONTROL StandardsEGMENT E - AUTOMATIC GENERATION CONTROL StandardsEGMENT F - INADVERTENT INTERCHANGE STANDARD
End of Course Instructions
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