ET8101 - Computation of Transient Overvoltages in Electrical Power Systems


Examination arrangement

Examination arrangement: Oral examination
Grade: Passed/Failed

Evaluation form Weighting Duration Examination aids Grade deviation
Oral examination 100/100 D

Course content

The course presents methods for accurate calculation of transients in electrical power systems. Main content:
- Summary of types of transients.
- Modelling of components with focus on overhead lines, cables and transformers, but also machines and circuit breakers are covered.
- Analysis of travelling wave problems. Formulation and solutions in time and frequency domain when losses and distortion is taken into account. Fourier transforms, modal analysis, and vector fitting.
- Description and analysis of ferroresonance and inrush currents in transformers.

Learning outcome

After completing the course, the student shall:
- understand the principles for accurate calculation of overvoltages in power systems
- understand the feasibility of models for various phenomena
- have achieved a detailed understanding in methods for advanced modeling of transmission lines and transformers valid under stationary and transient conditions

After completing the course, the student shall be able to:
- carry out transient calculations in EMTP programs
- evaluate the validity of models for various transient phenomena

Learning methods and activities

Colloquiums and lectures.
Calculation and computer excercises.
Laboratory exercises.
The course is given every second year, next time fall 2020.

Required previous knowledge

Basic course in overvoltages or insulation coordination.

Course materials

Power System Transients - Parameter determination, Ed. Juan A. Martinez-Velasco, CRC Press 2010.

More on the course



Version: 1
Credits:  7.5 SP
Study level: Doctoral degree level


Term no.: 1
Teaching semester:  SPRING 2021

No.of lecture hours: 2
Lab hours: 4
No.of specialization hours: 6

Language of instruction: English, Norwegian

Location: Trondheim

Subject area(s)
  • Electrical Power Engineering
Contact information
Course coordinator:

Department with academic responsibility
Department of Electric Power Engineering



Examination arrangement: Oral examination

Term Status code Evaluation form Weighting Examination aids Date Time Digital exam Room *
Autumn ORD Oral examination 100/100 D
Room Building Number of candidates
Spring ORD Oral examination 100/100 D
Room Building Number of candidates
  • * The location (room) for a written examination is published 3 days before examination date. If more than one room is listed, you will find your room at Studentweb.

For more information regarding registration for examination and examination procedures, see "Innsida - Exams"

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