ELE3341 - Electrical power systems and high voltage technic


Examination arrangement

Examination arrangement: Oral exam
Grade: Letter grades

Evaluation Weighting Duration Grade deviation Examination aids
Oral exam 100/100 30 minutes E

Course content

  • Calculations of design criterias for highvoltage insulation
  • Calculations of the electric field strength in various configurations
  • Calculations of Lightning overvoltages and Switching Overvoltages and knowledge about protection against these overvoltages.

Knowledge of the structure of the components of:

  • Distribution networks with distribution network station
  • Regional grid with transformer station
  • Main Grid with switchgear
  • Modeling of overhead lines
  • Calculations of: - Inductors for overhead lines
  • Capacitances of overhead lines and cables
  • Voltage and power loss in the wires
  • Phase Compensation
  • Radial networks using per.unit calculations
  • Be able to establish node-matrixes for power-flow calculations.

Learning outcome

After completing the course the student is meant to have:

  • the theoretical basis for calculating voltage stresses in electrical high voltage grid.
  • the theoretical basis for calculating voltage drop and losses in power grids.
  • the theoretical basis for designing measures to reduce voltage drop and network losses.

After the course the students should have knowledge about:

  • infrastructure, voltage levels and use of components and equipment for high voltage transmission and distribution in Norway.
  • material properties that are important for electrical stress of high voltage insulation and the most widely used insulation materials.
  • simplified theoretical models for calculating estimates of stresses of electrical equipment during normal operation, temporary overvoltages, atmospheric surges and switching surges in the grid.
  • simplified calculation of circuit parameters like resistance, inductance and capacitance for use in single-phase line models.
  • application of different line models due to the length of power lines.
  • application of models for transformers voltage fall and loss calculations.
  • the principles of load flow calculations in meshed networks.
  • what is meant by Norton_Raphson iteration and the priciples of how this is used in load flow calculations .


  • be able to learn and comply with the safety instructions for laboratory work.
  • be able to perform laboratory work.
  • communicate laboratory work in a technical report on a verifiable manner.
  • calculate the voltage drop and losses in radial networks.
  • calculate phase compensation to improve voltage drop and network losses.
  • apply per unit model when calculating voltage drop and network losses.
  • establish node-matrixes of meshed grids and apply Thevenin and Norton models.

General competence:

  • be able to discuss society issues due to electric power delivery.

Learning methods and activities

Web-based learning

There is no mandatory work, only recommendations as simulations and recommended tasks and exercises.

Further on evaluation

Re-sit of oral exam in February/Mars. Be aware that the final oral exam will be given autumn 2023.

Specific conditions

Admission to a programme of study is required:
Electrical Engineering (BIELEKTRO)
Engineering - Electrical (BIELE)
Engineering- Electric Power (BIELKR-F)
Power Engineering (VELKRAFT)

Course materials

Lasse Sivertsen Høyspenningssystemer ISBN 978-82-450-3353-3


Version: 1
Credits:  10.0 SP
Study level: Third-year courses, level III


Term no.: 1
Teaching semester:  AUTUMN 2022

Language of instruction: Norwegian

Location: Gjøvik

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

Department with academic responsibility
Department of electric energy


Examination arrangement: Oral exam

Term Status code Evaluation Weighting Examination aids Date Time Examination system Room *
Autumn ORD Oral exam 100/100 E 2022-12-01 09:00
Room Building Number of candidates
Spring UTS Oral exam 100/100 E 2023-03-16
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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