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EI2439 Power System Protection 6.0 credits

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Choose semester and course offering to see information from the correct course syllabus and course offering.

Headings with content from the Course syllabus EI2439 (Autumn 2021–) are denoted with an asterisk ( )

Content and learning outcomes

Course contents

  • consequences of faults in components of electric power systems
  • electric hazards to people and property
  • overcurrent protection in low-voltage systems
  • electric shock protection 
  • instrument transformers and other sensors
  • different generations of protection relays
  • system earthing and earth-faults in medium voltage distribution networks
  • protection principles in distribution networks including time and overcurrent 
  • protection of transmission lines: differences from distribution 
  • differential protection and distance protection 
  • transformer faults and protection schemes
  • generators and motors 
  • new challenges: sustainable development, new types of generator, DC-networks, higher speed, new algorithms, more communication

Intended learning outcomes

After passing the course, the student shall be able to

  • give an account of basic concepts in power system protection
  • solve standard problems from the major part of the course content.

To obtain higher grades, the student shall be able to

  • with progression in both completeness and width, make clear and justified assessments and calculations from all parts of the course content including problems that require synthesis from different parts of the course content and qualifying courses.

Course disposition

No information inserted

Literature and preparations

Specific prerequisites

Knowledge in power system components and substation design, 6 higher education credits, equivalent to completed course EI2436.

Knowledge in analysis of electric power system, 6 higher education credits, equivalent to completed course EG2100. 

Active participation in a course offering where the final examination is not yet reported in LADOK is considered equivalent to completion of the course. Registering for a course is counted as active participation. The term 'final examination' encompasses both the regular examination and the first re-examination.

Recommended prerequisites

Also recommended is the course EH2741 Communication and Control in Electric Power Systems.

The course is not suitable for students who have not already studied at master's level in electric power engineering.


No information inserted


No information inserted

Examination and completion

If the course is discontinued, students may request to be examined during the following two academic years.

Grading scale

A, B, C, D, E, FX, F


  • PRO1 - Project Work, 3.0 credits, grading scale: P, F
  • TEN1 - Written Examination, 3.0 credits, grading scale: A, B, C, D, E, FX, F
Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

Opportunity to complete the requirements via supplementary examination

No information inserted

Opportunity to raise an approved grade via renewed examination

No information inserted


Ethical approach

  • All members of a group are responsible for the group's work.
  • In any assessment, every student shall honestly disclose any help received and sources used.
  • In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.

Further information

Course web

Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.

Course web EI2439

Offered by

Main field of study

Electrical Engineering

Education cycle

Second cycle

Add-on studies

EH2745, Computer Applications in Power Systems

EG2110, Power System Stability and Control

Master's thesis project.


Nathaniel Taylor

Supplementary information

In this course, the EECS code of honor applies, see: