Subject description
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.
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. Shift transformers.
The subject is taught in programs
Objectives and competences
Acquiring in-depth knowledge of different types of generators and transformers, their properties, design features and applicability.
Teaching and learning methods
Lectures, demonstrations, work with computer tools, laboratory work, coursework, project work.
Expected study results
After successful completion of the course, students should be able to:
- present the problem of magnetization in generators and transformers,
- explain the transient phenomena in generators and transformers
- apply experiments of generators and transformers for their characterization,
- analyze short circuits within generators and transformers,
- illustrate generators and transformers with symmetric components.
- clarify the operating conditions of generators and transformers (island operation, operation on a rigid network, synchronous compensation).
Basic sources and literature
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JEREB, Peter, MILJAVEC, Damijan. Vezna teorija električnih strojev. 3. izd. Ljubljana: Fakulteta za elektrotehniko, 2024.
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Stephen L. Herman: Electrical Transformers and Rotating Machines, Delmar Cengage Learning; 4th Revised edition , Boston (MA) : Cengage Learning, cop. 2017
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Turowski, Janusz ; Turowski, Marek, Engineering electrodynamics : electric machine, transformer, and power equipment design, Boca Raton ; London ; New York : CRC Press/Taylor & Francis Group, cop. 2014
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Ion Boldea The electric generators handbook. Variable speed generators, Boca Raton ; London ; New York : Taylor & Francis, cop. 2006.
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Bharat Heavy Electricals Limited: Transformers, McGraw-Hill, 2005
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S.V. Kulkarni, S.A. Khaparde: Transformer Engineering, Marcel Dekker, Inc., 2004
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James H. Harlow: Electric Power Transformer Engineering, CRC Press, 2003
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Aa. Carlson, J. Fuhr, G. Schemel, F. Wegscheider: Testing of Power Transformers, Pro Print GmbH for ABB, Düsseldorf, 2003
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