Transient Effects in Electrical Systems
| Type of study | Follow-up Master |
|---|---|
| Language of instruction | English |
| Code | 410-4115/02 |
| Abbreviation | PJES |
| Course title | Transient Effects in Electrical Systems |
| Credits | 8 |
| Coordinating department | Department of Electrical Power Engineering |
| Course coordinator | Ing. Petr Moldřík, Ph.D. |
Subject syllabus
Lectures:
- Definition and classification of transients.
- Electromagnetic transients in power systems.
- Three-phase short circuit fed by an ideal source.
- Three-phase short circuit of a synchronous machine.
- Three-phase short circuit at the terminals (near) an asynchronous motor.
- Characteristic values of short circuit current in a general network.
- Parameters of power system elements in symmetrical component systems.
- Unsymmetrical operating states of a power system.
- Notes on practical calculation of short circuit currents.
- Calculation of short circuit currents in complex power systems.
- Dimensioning of electrical equipment according to the effects of short circuit currents.
- Earth faults in power systems (in isolated and compensated medium-voltage power grids).
- Transient overvoltages at (intermittent) earth faults.
- Electromechanical transients in power systems.
- The essence of electromechanical transients.
- Static stability (stability of small oscillations) of a simple system alternator - power grid with constant voltage and frequency.
- Dynamic stability (transient stability) of a simple system - rule of areas, oscillation curve.
- Stability of a complex power system.
- Asynchronous operation of a power system.
- Means for improving the stability of a power system
Exercises:
- Introduction, safety training, conditions for obtaining credit.
- Analysis of circuits using the symmetrical components method.
- Short circuits: Calculations of short circuit currents according to ČSN EN 60909-0 (Short circuit currents in 3-phase AC systems).
- Short circuits: Calculations of symmetrical short circuits and asymmetrical short circuits.
- Short circuits: Influence of asynchronous motors on short circuit ratios.
- Short circuits: Checking equipment for the effects of short circuit currents.
- Short circuits: Dimensioning of equipment for thermal and dynamic effects of short circuit currents.
- Earth faults in MV power grids: Calculation of ratios during earth faults.
- Earth faults in MV power grids: Setting/tuning of the compensating coil (quenching choke).
- Power system stability: Calculation of static stability (stability of small oscillations).
- Power system stability: Calculation of dynamic stability (transient stability).
- Assignment and development of an independent semester project.
- Credit test.
Laboratory measurements:
- Measurement of short-circuit currents using DC physical model.
- Measurement of Earth fault using AC physical model.
Projects:
- Calculation of short circuit ratios (a/symmetrical short circuit currents) in the electrical distribution network.
- Definition and classification of transients.
- Electromagnetic transients in power systems.
- Three-phase short circuit fed by an ideal source.
- Three-phase short circuit of a synchronous machine.
- Three-phase short circuit at the terminals (near) an asynchronous motor.
- Characteristic values of short circuit current in a general network.
- Parameters of power system elements in symmetrical component systems.
- Unsymmetrical operating states of a power system.
- Notes on practical calculation of short circuit currents.
- Calculation of short circuit currents in complex power systems.
- Dimensioning of electrical equipment according to the effects of short circuit currents.
- Earth faults in power systems (in isolated and compensated medium-voltage power grids).
- Transient overvoltages at (intermittent) earth faults.
- Electromechanical transients in power systems.
- The essence of electromechanical transients.
- Static stability (stability of small oscillations) of a simple system alternator - power grid with constant voltage and frequency.
- Dynamic stability (transient stability) of a simple system - rule of areas, oscillation curve.
- Stability of a complex power system.
- Asynchronous operation of a power system.
- Means for improving the stability of a power system
Exercises:
- Introduction, safety training, conditions for obtaining credit.
- Analysis of circuits using the symmetrical components method.
- Short circuits: Calculations of short circuit currents according to ČSN EN 60909-0 (Short circuit currents in 3-phase AC systems).
- Short circuits: Calculations of symmetrical short circuits and asymmetrical short circuits.
- Short circuits: Influence of asynchronous motors on short circuit ratios.
- Short circuits: Checking equipment for the effects of short circuit currents.
- Short circuits: Dimensioning of equipment for thermal and dynamic effects of short circuit currents.
- Earth faults in MV power grids: Calculation of ratios during earth faults.
- Earth faults in MV power grids: Setting/tuning of the compensating coil (quenching choke).
- Power system stability: Calculation of static stability (stability of small oscillations).
- Power system stability: Calculation of dynamic stability (transient stability).
- Assignment and development of an independent semester project.
- Credit test.
Laboratory measurements:
- Measurement of short-circuit currents using DC physical model.
- Measurement of Earth fault using AC physical model.
Projects:
- Calculation of short circuit ratios (a/symmetrical short circuit currents) in the electrical distribution network.
E-learning
Materials are available at https://lms.vsb.cz/?lang=en.
Literature
1. Anderson, P. M.: Analysis of Faulted Power Systems. IEEE Press Power Systems Engineering Series, 1995, ISBN: 0-7803-1145-0 .
2. Machowski, J., Bialek, J.W., Bumby, J.R.: Power system dynamics and stability. Wiley, 1997.
3. Anderson, P.M., Fouad, A.A.: Power system control and stability. Iowa, 1977.
2. Machowski, J., Bialek, J.W., Bumby, J.R.: Power system dynamics and stability. Wiley, 1997.
3. Anderson, P.M., Fouad, A.A.: Power system control and stability. Iowa, 1977.