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EG2120 FACTS and HVDC in Electric Power Systems 7.5 credits

The course starts with a review of static and dynamic issues in power systems. Then FACTS and HVDC are presented and it is shown how these components may be a technical solution to the described issues. It will be discussed in the course how FACTS and HVDC are designed and also what functions they have. Basic mathematical models and control strategies are presented and used to analyze the impact of theses components on power system stability.

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Headings with content from the Course syllabus EG2120 (Spring 2022–) are denoted with an asterisk ( )

Content and learning outcomes

Course contents

FACTS (Flexible AC Transmission System) and HVDC (High Voltage Direct Current) transmission are power electronics-based devices whose functions are to enhance the capacity, security and flexibility of power transmission systems. Application of these components in power systems implies an enhancement of transient and voltage stability, increase of power oscillation damping (POD) and improvement of power flow under undisturbed or post-fault conditions. The course starts with a short review of some issues (or problems) that an electric power system may face. Next it is discussed how these components are designed and what their main properties are. The following lectures focus on the use of the FACTS and HVDC transmission as technical solution to the issues described earlier. Basic mathematical models and control strategies used to analyze the impact of these devices on power system stability are presented. Most part of the analysis is dedicated to POD which is the main topic of this course. Lectures for the use of the main features of the necessary software are scheduled.

Intended learning outcomes

After passing the course, the student shall be able to

  1. create basic mathematical models for controllable components (FACTS and HVDC) and based on these be able to carry out load flow analysis and stability analysis of electric power system and apply different control strategies for these controllable components
  2. present, analyse critically and explain simulation results about the effect of controllable components on power system stability and damping,.

Course disposition

No information inserted

Literature and preparations

Specific prerequisites

Completed courses corresponding to:

  • EG2110 Stability and control of electric power system
  • EJ2301 Power electronics.

Active participation in a course offering where the final examination is not yet reported in LADOK is considered equivalent to completion of the course.

Being registered for a course counts as active participation.

The term 'final examination' encompasses both the regular examination and the first re-examination.

Recommended prerequisites

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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, 7.5 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

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Opportunity to raise an approved grade via renewed examination

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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 EG2120

Offered by

Main field of study

Electrical Engineering

Education cycle

Second cycle

Add-on studies

No information inserted


Danilo Obradovic (

Supplementary information

The course responsible evaluates all applicants to the course. Please contact course responsible before admitting any student to the course.