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FEI3340 Fault Analysis and Protection Principles in Electric Power Systems 10.0 credits

Advanced studies in Power System Protection and Safety. Analysis of faults in balanced and unbalanced conditions is covered more thoroughly than in the corresponding second-cycle course, including students' own numerical implementations. Fundamental principles and blocks of protection systems are also studied in more depth, including use of established simulation programs and own implementations. Students further specialise in subareas of relevance to their research interests, with reading, project work and seminars; this specialised study is finished with a report, which is welcomed to be in the format of a paper in a conference or journal.

Course offering missing for current semester as well as for previous and coming semesters
Headings with content from the Course syllabus FEI3340 (Autumn 2019–) are denoted with an asterisk ( )

Content and learning outcomes

Course contents

Fault types. Analysis of balanced faults. Direct and symmetric-component analysis of unbalanced faults, and their relation and limitations. Core principles used for protection, including some signal-processing aspects. Future challenges, including consequences of increased renewable generation.

Intended learning outcomes

After taking this course the student should be able to demonstrate the ability to:

  • Describe analytically, and implement numerically, methods for circuit solution of faulted power systems. 
  • Implement in software a protection algorithm for sampled data. 
  • Contrast good and bad points of different protection principles for various applications.
  • Define and discuss ways in which changes in power systems, in particular the move towards a sustainable energy supply, affect the demands on protection systems now and in the future. 
  • Search, select, and critically evaluate suitable sources for obtaining new, detailed knowledge about a research topic within the course's scope. 
  • Present their new knowledge accessibly in oral and written form.

Course disposition

The first part has a common set of subjects for all students, based on lessons and assignments. The second part has specialisation based on self-study and seminars. 

The exact distribution of time may vary according to the Course-PM of each round:  indicatively,  lessons (16h), seminars (10h),  study and assignments in common parts of the course (80h), project work in the specialization (120h), and the remainder of time on revision for a written examination.

Literature and preparations

Specific prerequisites

Completed master-level education or equivalent. Students are typically expected to be doctoral students in subjects within the Electric Power area.

Recommended prerequisites

Courses or equivalent experience corresponding to EI2439 Power System Protection, particularly EG2100 Power System Analysis. Familiarity with power system components is helpful. Circuit solutions will required for ac and transient state, and matrix algebra will be used for numerical solutions of networks.


Nothing beyond availability of a computer.


Course material will be specified further for each round of the course. It is based on several books and many further resources of published articles and manuals and the course's own notes and assignments.

Examination and completion

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

Grading scale

P, F


  • EXA1 - Examination, 10.0 credits, grading scale: P, 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.

The common part of the course is examined based on several assignments and on a final written examination. The specialization is examined based on the final report and on the presentation and discussion at seminars. The subject of the specialization is defined by the student, and must be approved by the examiner before getting started.

Other requirements for final grade

All the four parts of examination must be approved in order to pass the course: assignments, written examination, presentations and final report.

Opportunity to complete the requirements via supplementary examination

No information inserted

Opportunity to raise an approved grade via renewed examination

No information inserted


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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 FEI3340

Offered by

EECS/Electromagnetic Engineering

Main field of study

This course does not belong to any Main field of study.

Education cycle

Third cycle

Add-on studies

No information inserted

Postgraduate course

Postgraduate courses at EECS/Electromagnetic Engineering