Overvoltage in Power Systems

Lecturer:

Tutor:

Supervisor:

Department of Electroenergetics

Synopsis:

The subject surveys the problem of overvoltages in electrical power transmission and distribution. It deals with particular types of overvoltages, with the reason of their occurrence and measurement. Students gain knowledge of modelling of electromagnetic transients by the program ATP EMTP, they practice the ways of overvoltage calculation, measurement and analysis.

Requirements:

Syllabus of lectures:

1. Quality parameters of electric power, types of overvoltages

2. Electromagnetic transients in power systems, their calculation and analysis

3. Switching overvoltages in AC and DC power systems

4. Temporary overvoltages

5. Overvoltages caused by resonance and ferroresonance

6. Travelling waves on transmission lines

7. Lightning discharge, probability of its occurrence, parameters

8. Overvoltages caused by lightning

9. Protection of buildings against lightning

10. Protection against overvoltages

11. Measurement of overvoltages in power systems

12. Insulation coordination

13. Electromagnetic compatibility in power systems

14. Evaluation of power quality from the viewpoint of overvoltage occurrence

Syllabus of tutorials:

1. Introduction to the operation of the program ATP EMTP

2. Solution of electromagnetic transients by ATP EMTP

3. Analysis of recorded voltage courses

4. Measurement of ferroresonance

5. Measurement of travelling waves on a line

6. Modelling of travelling waves on a line

7. Switching overvoltages - modelling

8. Influence of the switching station configuration on the magnitude of overvoltages

9. Measurement of arresters exposed to the testing atmospheric impulse

10. Modelling of arrester operation during the lightning stroke to a transmission line

11. Preparation of the individual project - based on technical literature

12. Immunity EMC test by the current impulse

13. Evaluation of the electrical power quality - processing of recorded data

14. Project presentation

Study Objective:

Study materials:

1. Greenwood A.: Electrical Transients in Power Systems. John Wiley & Sons, Inc., New York, 1991

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: