Single-Course English 5 ECTS

Transients in power systems

Overall Course Objectives

To give a solid background for understanding and calculation of the generation and characteristics of electrical transients in selected electric power systems.
Also knowledge will be achieved within component’s high frequent equivalents and the influence of transients on these components and on the grid performance.
The students will become familiar with PSCAD as numerical tool for time domain simulations and a number of other methods used in power engineering.

Learning Objectives

  • Calculate simple transients analytically and numerically
  • Establish broad band models for some common components
  • Evaluate a component’s electrical characteristics under transient voltages
  • Use PSCAD as numerical tool for time domain simulations
  • Distinguish between models with and without distributed parametres
  • Apply a number of electromagnetic principles to power components
  • Calculate over voltages under switching events and lightning exposure
  • Understand the basic principles of overvoltage protection

Course Content

A number of fundamental topics relevant for the power system and its components will be treated.
Transients occur under lightning and under switching processes in the grid, including closing and breaking actions.
Calculation of overvoltages requires application of high frequent component equivalents based on lumped circuits, as well as including transmission line models with distributed parameters.
In particular will be treated cables, breakers and transformers in different configurations. Also covered are calculation of overvoltages in overhead line systems under lightning.
The system’s response and resistance against these transients are investigated by means of insulation coordination.
The numerical tool mainly used is PSCAD.

Recommended prerequisites

31730/46700, 46700/31730 Electric Power Engineering, fundamentals

Teaching Method

Lectures and group work. A number of mandatory problems have to be solved incl. a larger simulation assignment by means of a numerical time domain tool. Approval of the solutions is required for passing the course.


See course in the course database.





13 weeks




DTU Lyngby Campus

Course code 46715
Course type Candidate
Semester start Week 35
Semester end Week 48
Days Thurs 13-17

7.500,00 DKK