# Electrical Power Networks and Devices

## Subject description

Development of electric power networks and general division of power networks. Complex quantities and systems of components. Mechanical parameters of overhead power lines, construction of lines, and electrical parameters of power lines.

Composition of high voltage power cables, construction of power cables, impedances of single-core and three-core cables. Loading criteria of power networks. Electrical parameters of two winding and three winding transformers, synchronous generators and asynchronous machines.

Types of power substations with different implementations of switchyards. High voltage switching technology – circuit breakers and other switching devices.

Classical power factor correction devices, passive filters and reactors. Modern compensation devices with power electronics modules.

Distributed power sources and active distribution networks.

## Objectives and competences

The student will acquire the knowledge of main elements and devices of electrical power networks and the basic knowledge of mathematical modelling and parameters of electrical power elements used in power systems analysis.

## Teaching and learning methods

Lectures, tutorials (auditory practice and laboratory work).

## Expected study results

After successful completion of the course, students should be able to:

– describe the power system structure and the functions of main power network elements,

– explain the approach to modelling of power system elements and devices,

– define the parameters of models of power system elements and devices,

– analyze system operation with the use of symmetrical components,

– develop a power system model,

– evaluate the adequacy of the power-system models based on the analyzed problem.

## Basic sources and literature

1. Papič I., Žunko P., Elektroenergetska tehnika I (Electric Power Engineering I), Založba FE in FRI, 2009.
2. Kiessling, F., Nefzger P., Nolasco J.F., Kaintzyk U., Overhead Power Lines: Planning, Design, Construction, Springer Verlag, 2003.
3. William H. Kersting, Distribution System Modeling and Analysis, CRC Press, 2002.
4. Ramasamy Natarajan, Power system capacitors, Taylor & Francis, 2005.

## Stay up to date

University of Ljubljana, Faculty of Electrical Engineering Tržaška cesta 25, 1000 Ljubljana