Generators and transformers

Higher education teachers: Miljavec Damijan
Credits: 6
Semester: winter
Subject code: 64218

Subject description


Completed all study obligations from lower study years.

Content (Syllabus outline):

  • The losses in the core, windings and additional losses in generators and transformers. Type of windings (Y, D, Z). Magnetization problems of generators and transformers. Dynamic analysis of short circuits in generators and transformers.
  • Inrush phenomenon of generators and transformers. Various types of cooling (ONAN, ONAF, OFAF ...). Attenuation of short circuits.
  • Basic tests of generators and transformers. Monitoring the aging of insulation in generators and transformers.
  • Operating conditions (isolated operation, operating on a rigid network, synchronous compensator). Oscillations in generators. Synchronous reactance. Transient reactance. Sub-transient reactance. “Per-unit” system. Generators and transformers presented by symmetrical components.

Objectives and competences:

Acquiring in-depth knowledge of different types of generators and transformers, their properties, design features and applicability.

Intended learning outcomes:

The emphasis is on applied knowledge and on understandings how to select right type of generator and transformer regarding their properties and field of use.

Learning and teaching methods:

Lectures, demonstrations, work with computer tools, laboratory work, coursework, project work.

Study materials


  1. Jereb Peter, Damijan Miljavec: Vezna teorija električnih strojev, Založba FE in FRI 2008
  2. Bharat Heavy Electricals Limited: Transformers, McGraw-Hill, 2005
  3. S.V. Kulkarni, S.A. Khaparde: Transformer Engineering, Marcel Dekker, Inc., 2004
  4. James H. Harlow: Electric Power Transformer Engineering, CRC Press, 2003
  5. Aa. Carlson, J. Fuhr, G. Schemel, F. Wegscheider: Testing of Power Transformers,
  6. Pro Print GmbH for ABB, Düsseldorf, 2003
  7. Ion Boldea Variable Speed Generators, Taylor & Francis, 12. dec. 2010.
  8. Juha Pyrhonen, Tapani Jokinen, Valeria Hrabovcova, Design of Rotating Electrical Machines, John Wiley & Sons, 2009.

Study in which the course is carried out

  • 1 year - 2nd cycle - Electrical Engineering - Electrical Power Engineering
  • 1 year - 2nd cycle - Electrical Engineering - Mechatronics