TET4180 - Electric Power System Stability


Examination arrangement

Examination arrangement: Portfolio assessment
Grade: Letters

Evaluation form Weighting Duration Examination aids Grade deviation
Written examination 80/100 4 hours D
Work 20/100

Course content

The course aims to give basic knowledge about the dynamic mechanisms and stability problems in electric power systems, including physical phenomena, modelling and control and methods and tools for dynamic simulations.

A group project work running through most of the semester is a major part of the home work. MATLAB and SIMPOW are used as tools for modelling and simulation of various aspects of power system stability phenomena. The project is being graded and is given 25% weight at the final exam.

Learning outcome

After completing this course the candidate should be able to:
- understand methods for dynamic power system analysis, including steady state and transient stability.
- understand the modelling of synchronous machines for dynamic analysis (in steady state operation and during grid faults).
- understand power-frequency control and voltage control using detailed models of turbines, generators and network. Emphasis on modelling of synchronous machines with excitation systems and hydro turbines including penstock and hydraulic system.
- understand the principles for primary control, including modelling of turbine governors and voltage controllers.
- understand the principles for secondary control, including setpoint control of active power and voltage, active reserves and load following control.
- basic understanding of modelling and dynamic analysis of large power systems, in particular power system damping issues involving modal analysis.
- know the basic construction and application of FACTS components.

After completing this course the candidate should be able to:
- analyse the stability of simple power systems using linear analysis methods and the equal area method.
- apply computer simulation tools for dynamic analysis of large power systems.
- establish the differential equations describing simple one machine infinite bus systems and perform detailed analyses of such systems.
- use control engineering methods for design and tuning of turbine governors and voltage controllers.
- perform analysis related to frequency control and reserve requirements in a synchronously interconnected power grid.

Learning methods and activities

Lectures. Compulsory exercises and computer simulations. Compulsory project work. The final evaluation will be based on a written examination (counting 80%) and a project (counting 20%) based on % fulfillment. Final grading will be from A to F. The course is given in English. If there is a re-sit examination, the examination form may change from written to oral.

Compulsory assignments

  • Exercises

Specific conditions

Exam registration requires that class registration is approved in the same semester. Compulsory activities from previous semester may be approved by the department.

Course materials

Book: Power System Dynamics and Stability, J Machowski; J Bialek, J Bumby, John Wiley & Sons, ISBN:0470725583, 2nd edition. Lecture notes. Written assignments and computer programs.

Credit reductions

Course code Reduction From To
SIE1060 7.5



Examination arrangement: Portfolio assessment

Term Evaluation form Weighting Examination aids Date Time Room *
Spring Work 20/100
Spring Written examination 80/100 D 2017-06-08 09:00 R D1-102 Datasal
Summer Work 20/100
Summer Written examination 80/100 D
* 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.