The purpose of this videotape is to present protection schemes that are used to assist in maintaining system stability. The concept of steady-state operation and dynamic response is demonstrated with particular reference to the power angle curve. The physical consequences of instability are also discussed. After study of this course and associated workbook, participants should be able to understand the following overall concepts and be able to apply them to their day-to-day work activities. They will also be able to answer related test questions on these subjects: Power transmission, Steady-state operation, Function of turbine governor and voltage regulator, Power transfer equation, Effect of change in V, XL and power angle, Critical power angle 90º, Dynamic response - rotor inertia, Power angle curve - equal area concept, Loss of transmission line, Effect of initial loading, Phase-to-phase faults, Automatic reclosing of transmission lines, Automatic reclosing of distribution lines, Limitations of automatic reclosing, Synchrocheck relays, Single pole tripping and reclosing, Instability out-of-step operation, Load swings, Voltage profile - effect on distance relays, Out-of-step relays, blocking and tripping, Load shedding, Frequency relays.
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=4.00
- Trainees will be able to explain the factors that determine the amount of power that can be transferred across a transmission circuit.
- Trainees will be able to explain the concept of stability limit as it applies to power transfer across a transmission line.
- Trainees will be able to describe the relationship between the energy input to the prime mover and the energy output from the generator.
- Trainees will be able to describe the events that take place in the short interval between the occurrence of a disturbance and the system settling down to a new steady-state condition.
- Trainees will be able to describe the main features and limiting factors of various reclosing schemes that are often employed on both transmission and distribution systems.
- Trainees will be able to describe the effect of instability on the power system.
- Trainees will be able to describe the various protection schemes that are installed on power systems to detect instabilities and provide remedial action.
SEGMENT A - PRIMARY DISTRIBUTION SYSTEMSEGMENT B - SUPPLY TO THE CUSTOMER SEGMENT C - CONTINUITY OF SERVICE
End of Course Instructions
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