Pennsylvania 2111 - Protection for System Stability

2111 - Protection for System Stability

85.00 85.00

  • Course Delivery: On Demand
  • Duration: 4 


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 90ยบ, 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


Course Objectives

Learning Objectives:
- 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.


Topics Covered






End of Course Instructions

Congratulations on completing the course! Your credits earned on completion of this program will be reported to within 30 days of completion. Once we report your completion at, you will receive a certificate of completion provided by RCEP on the email address you have provided at the time of enrollment. Please keep the certificate for your record. You may be required to submit this certificate to the state to record your PDH or present it in case if you are audited. If you have any questions or concerns please contact customer service at



After completing this course the final exam must be passed with a 70% or higher in order to receive certificate of completion.


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