Course content

Analysis of disturbances as current and voltage transients in electrical networks. Description and calculation of travelling waves on lossless electrical conductors along with measuring techniques related to fast voltage variations. Ligthning overvoltages in high and low voltage systems, lightning protection and lightning induced overvoltages. Switching overvoltages and temporary overvoltages. Establishing ideal computational models valid for the voltage and frequency ranges represented by the overvoltages. Impact of grounding conditions and grounding resistance. Description of different types of overvoltage protection in both high and low voltage systems with a focus on metal oxide arresters. Overview on dimensioning and location of protection in the system to avoid damage to equipment.

Learning outcome

The course gives an introduction to generation and distribution of overvoltages and protection against these. Analytical formulations in simplified configurations enable the students to later on use computer programs with a critical effectiveness.

Learning methods and activities

Lectures. Compulsory exercises, computer exercise, laboratory experiments. If there is a re-sit examination, the examination form may change from written to oral.

Compulsory assignments

• Laboratory work with report
• Computer exercise with report
• Exercises

Recommended previous knowledge

TET4100 Circuit Analysis or equivalent.

Course materials

Printed compendium.

Credit reductions