Graduate study programme

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Power Transformers DEa1-04-17

ECTS 5 | P 30 | A 15 | L 15 | K 0 | ISVU 149732 177083 | Academic year: 2019./2020.

Course groups

Prikaži sve grupe na predmetu

Course lecturers



Explain the working principle of a power transformer and the basic principles of designing and selecting a power transformer. Explain the calculation and simulations of characteristic variables in stationary and transient states.

Conditions for enrollment

Requirements met for enrolling in the study programme

Course description

Working principles of power transformers, application of the electromagnetic theory, inductance and the dynamic inductance, flux linkage, energy of two magnetically coupled circuits, magnetic scalar and vector potential, magnetic dipole moment, Maxwell equations. The ideal and the perfect transformer, flux leakage, no-load current, harmonic analysis of no-load current. Iron core losses, initial magnetisation curve, hysteresis loop, remanent flux, saturation level, analysis of transformer energisation current. Copper losses, impedance voltage, Kapp regulation diagram, equivalent scheme and vector diagram of a power transformer in different operational states. Design types, vector groups, heat transfer, operational types, winding life cycle. Voltage regulation, parallel operation. Protection principle of a power transformer. Basic designing principles. High order harmonics, the third harmonic issue in dependence of a vector group and an iron core type.

Student requirements

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Monitoring of students

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Obligatory literature

1. 1 A. Dolenc Transformatori I i II dio Sveučilišna naklada, Zagreb, 1991

2. 2 James H. Harlow Electric Power Transformer Engineering - Third Edition CRC Press, Taylor & Francis Group, 2012.

Pretraži literaturu na:

Recommended additional literature

1. 1 H. Požar Visokonaponska rasklopna postrojenja Tehnička knjiga Zagreb, 1990

2. 2 B. Mitraković Transformatori Naučna knjiga, Beograd, 1985.

Course assessment

Conducting university questionnaires on teachers (student-teacher relationship, transparency of assessment criteria, motivation for teaching, teaching clarity, etc.). Conducting Faculty surveys on courses (upon passing the exam, student self-assessment of the adopted learning outcomes and student workload in relation to the number of ECTS credits allocated to activities and courses as a whole).

Overview of course assesment

Learning outcomes
Upon successful completion of the course, students will be able to:

1. describe the working principle (electromagnetic theory), design and operation types of power transformers

2. understand and apply an equivalent scheme and a vector diagram of a power transformer

3. understand and apply the basic principles of power transformer designing

4. make a calculation of power transformer nominal values, allowed heating and variables in different transient states

5. calculate and simulate variables in stationary and transient states using simulation interfaces

6. analyse transformer energisation, remanent flux, high order harmonics in dependence of an iron core type and a vector group

Aktivnosti studenta: Vidi tablicu aktivnosti