Subject description
The course focuses on the analysis of phenomena in electricity networks that affect the quality of electricity supply.
General overview of power quality, basic concepts and definitions, basic voltage quality parameters, overview of standards. Voltage quality measurements.
Harmonic distortion of voltage. Sources, propagation and consequences of harmonic distortion, compensation of harmonic distortion. Network modelling for harmonic propagation analysis, resonance phenomenon in power networks.
Voltage flicker. Sources, propagation and consequences of flicker, flicker compensation techniques. Network modelling for flicker propagation analysis.
Voltage sags and interruptions. Power outage indicators. Voltage sags, voltage unbalance, overvoltage.
Modern compensation devices. Topologies and mathematical model of voltage source converter.
Economic cost assessment for improving the quality of electricity supply.
The subject is taught in programs
Objectives and competences
The student will acquire the knowledge of basic power quality terms and supply voltage characteristics and will also improve their knowledge of measurement performance, analysis of measurement results of power quality parameters, and possible measures to improve power quality.
Teaching and learning methods
Predavanja, avditorne vaje, laboratorijske vaje. Del pedagoškega procesa bo izveden s pomočjo IKT tehnologij in možnosti, ki jih ponujajo.
Expected study results
After successful completion of the course, students should be able to:
- explain the importance of power quality for the operation of power networks and customer supply,
- distinguish between the main parameters of voltage quality and compensation methods,
- analyze simple cases of harmonic distortion and flicker spreading,
- use the knowledge for practical application of measurements and power quality analysis,
- make the connection between the quality of supply, compensation planning and consequences of poor quality of supply,
- use the knowledge of measurement procedure and analysis of measurement results in the frame of other measurements.
Basic sources and literature
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Dougan, R.C., McGranaghan, M.F., Wayne Beaty, H., Electrical Power Systems Quality, McGraw-Hill, 1996.
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Bollen, M.H.J., Understanding Power Quality Problems – Voltage Sags and Interruptions, IEEE, 2000.
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Arrillaga, J., Smith, B.C., Watson, N.R., Wood, A.R., Power System Harmonic Analysis, Wiley, 2000.
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University of Ljubljana, Faculty of Electrical Engineering Tržaška cesta 25, 1000 Ljubljana