The importance of electric power quality for distribution networks: basic terms and definitions, the importance and relevance, level of tolerance. The methods of measuring and monitoring parameters: advanced measurement systems. The application of systems for continuous monitoring of power quality parameters in distribution networks. Voltage variations in the steady state and flicker: definitions, sources and effects. Voltage sags: definitions, characteristics, causes, propagation, presentation, consequences and simulation. A comparison of performances. The sensitivity of the equipment to voltage sags. The assessment of financial losses. Harmonics: definitions, sources and effects. The methods of analysis. The propagation of harmonics: harmonic power flow calculation. The methods of mitigation. The design and calculation of the filter. The review of international regulations and standards. A part of the course is being realized through individual research study in the field of power quality in distribution networks. The research study includes the overview of bibliography, organization and performance of experiments and statistical data processing, numerical simulation, writing of papers closely related to scientific and educational area of the doctoral dissertation topic.