Components and Equipment of Electric Power Supply


Picture of Klein, Christopher © Copyright: Martin Braun


Christopher Klein

Team DC Systems


+49 241 80 97348



Dates and Infos


Description of the lecture

Prof. Schnettler holds this lecture (V2, Ü1) in cooperation with Prof. Hameyer from the Institute of Electrical Machines (IEM). The lecture is available only in German. It is primarily aimed at students in the Bachelor's degree courses in Electrical Engineering or Business Administration and Engineering EPE. It is offered in the winter semester.

Students are introduced to the structure and components of power systems based on fundamental physical principles of gas discharges and thermodynamics. In addition to energy conversion from renewable or conventional energy sources in power plants, electricity grids for energy transmission are a key component of electricity supply. These comprise lines (cables or overhead lines) and substations consisting of a number of different components such as transformers, switchgear or instrument transformers. High voltages (e.g. 380 kV) are used to transfer the high amounts of energy with as few losses as possible, which leads to high technical requirements for the various components during normal operation. In addition, disturbances such as lightning strikes can cause overvoltage and overcurrent, which must be contained by suitable components. In order to test the different components for compliance with these technical requirements under laboratory conditions, separate test systems must be used.

Course contents

The focus of the lectures is on:

  • Power transmission (overhead lines, cables)
  • Switchgear (switchgear, measuring transformers, surge arresters)
  • Test arrangements
  • Fundamentals of gas discharge
  • Power stations
  • Power generation from renewable sources (hydro and wind power)
  • Energy conversion (generators, motors, transformers)
  • Fundamentals of thermodynamics for different power plant types (nuclear, coal, gas or combined cycle power plants)


Participation in the modules SCH1, GET3 and GET4

Educational goals

After successful participation in the module course, students are able to understand and analyse the structure and operation of power system components as well as their significance and function in the overall system.


Written exam (90 minutes)


  • R. Flossdorf, G. Hilgarth, Elektrische Energieverteilung, Teubner Studienskripten
  • N.Mohan, Power Systems, MNPERE Minneapolis