Power Electronics

Course Description

Application of power electronics in sequence: production, transmission, distribution and consumption of electrical energy. Basic power electronic conversions: rectification, inversion, DCDC conversion, ACAC conversion. Modeling and simulation of power electronic systems. Power i control characteristics of power converters: efficiency, conversion efficiency, power factor. Application of power electronics in alternative electric energy sources. Energy saving and power quality, environment protection.

General Competencies

Deep understanding of the problems and solutions of power electronics, with applications to electric drives and power systems. Understanding of energy saving and improvement of power quality using power electronics.

Learning Outcomes

  1. analyze the operation of power electronic converters by conversion type
  2. analyze the negative effects of power electronic converters operation on the sources and loads
  3. compare the properties of different types of power electronic converters
  4. analyze the complex system of a power converters and it's basic components
  5. compare the features and performance characteristics of power semiconductor devices
  6. analyze basic power converter control laws

Forms of Teaching

Lectures

Lectures are organized through 2 teaching cycles. The first cycle consists of 7 weeks of classes and mid-term exam, a second cycle of 6 weeks of classes and final exam. Classes are conducted through a total of 15 weeks with a weekly load of 3 hours.

Exams

Examination consists of mid-term exam and final exam in which numerical problems are solved, and the writing of reports and seminars about laboratory exercises.

Seminars

During the semester, students prepare seminar work in which they show their theoretical knowledge, knowledge of modeling and simulation as well as knowledge of working in the lab.

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Seminar/Project 0 % 20 % 0 % 0 %
Mid Term Exam: Written 0 % 20 % 0 %
Final Exam: Written 0 % 40 %
Final Exam: Oral 20 %
Exam: Written 0 % 70 %
Exam: Oral 30 %

Week by Week Schedule

  1. The field of power electronics. Applications of power electronics and electric power and electric machinery.
  2. The fundamental power electronics valves, switches and passive components. Ideal, the idealized and realistic models.
  3. Topologies and functions of power electronic converters. The development of topologies and comparison of characteristics of electronic power converters. Principles of problem solving in power electronics.
  4. The basic power electronic circuits. Ideal rectifiers and phase controled rectifiers. Rectifier and inverter operation mode.
  5. Commutation. Commutation effects. Selected topics in rectifier circuits.
  6. DCDC converters without galvanic isolation. Main types; step-down, step-up and step up-down. Continuous and discontinuous operation mode. Control principles, voltage and current control mode.
  7. DCDC converters with galvanic isolation. The main types, direct and indirect DCDC converter with galvanic isolation. Continuous and discontinuous operation mode. Overview of other of DCDC converters types.
  8. Midterm exam
  9. Inversion and inverters. Autonomous, resonant and phase controled rectifiers as inverters.
  10. Single-phase and three-phase inverter circuits. Power switch control, modulation. Sinewave and vector modulations.
  11. ACAC converters. Direct and indirect. Cycloconverters and matrix converters. Indirect ACAC converters as the mostly used solutions for AC adjustable speed drives.
  12. Modern power electronic valves; IGBT and MOSFET, other important valves. Detailed overview of structures, properties and characteristics. Catalogue data of power electronic valves and modules. Interpretation and application of catalogue data.
  13. Power electronic valves protection. Snubber circuits, fuses and active protection. Driver circuits for SCRs and transistors. Power losses calculation, thermal management.
  14. Application of power electronics in the field of renewable energy sources. Power factor correction. Power flow control between DC and AC power source.
  15. Final exam

Study Programmes

University graduate
Electrical Engineering Systems and Technologies (profile)
Theoretical Course (1. semester)
Electrical Power Engineering (profile)
Specialization Course (1. semester) (3. semester)

Literature

J. Kassakian, M. Schlecht, G. Verghese (2000.), Osnove energetske elektronike I. dio (prijevod), Graphis
D. W. Hart (1997.), Introduction to Power Electronics, Prentice Hall
B. W. Williams (2006.), Principles and Elements of Power Electronics, B. W. Williams
N. Mohan, T. Undeland, W. Robins (2004.), Power Electronics: Converters, Applications and Design, Wiley
I. Flegar (2010.), Elektronički energetski pretvarači, Kigen

Associate Lecturers

General

ID 34575
  Winter semester
5 ECTS
L1 English Level
L1 e-Learning
45 Lectures
0 Exercises
0 Laboratory exercises
0 Project laboratory

Grading System

87,5 Excellent
75 Very Good
62,5 Good
50 Acceptable