Overvoltages in Power Systems

Lecturer:

Tutor:

Supervisor:

Department of Electroenergetics

Synopsis:

The subject deals with main mechanisms of formation of overvoltages in power systems. It shows ways of protection against overvoltages and explains methods for measurement and calculation of overvoltages. It describes mechanism of lightning and ways of protection against lightning. Procedure of insulation co-ordination is described, as well as problems connected with electromagnetic compatibility in power systems.

Requirements:

Syllabus of lectures:

1.Types of overvoltages, electrical transients in circuits.

2.Switching overvoltages in AC networks.

3.Switching overvoltages in DC networks.

4.Resonance and ferroresonance.

5.Temporary overvoltages.

6.Traveling waves on transmission lines

7.Overvoltages caused by lightning

8.Protection of structures against lightning.

9.Protection against overvoltages.

10. Calculation of overvoltages.

11. Models of power system elements.

12. Measurement of overvoltages.

13. Insulation co-ordination.

14. Electromagnetic compatibility in power systems

Syllabus of tutorials:

1.Introduction to ATP-EMTP.

2.Modelling of transients in RLC-circuits.

3.Calculation of recovery voltages.

4.Overvoltages caused by interruption of currents.

5.Measurement of ferroresonance.

6.Preparation of a paper review.

7.Reflection of travelling waves - measurement.

8.Modelling of travelling waves reflection.

9.Modelling of overvoltages caused by lightning.

10. Calculation of protection devices efficiency.

11. Measurement on arresters.

12. Measurement of cable shielding efficiency.

13. Paper review.

14. Solved problems.

Study Objective:

Study materials:

Greenwood A.: Electrical Transients in Power Systems, John Willey & Sons,

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Elektroenergetika-inženýrský blok (compulsory course)
• Elektroenergetika-inženýrský blok (compulsory course)