Advantages of Using MatLab Simulink in Laboratory Lessons on Operating Conditions of Overhead Power Lines

The electrical power transmission is realised in most of the cases by overhead power lines long of hundred of kilometres and operating at different high voltage levels. The load of these overhead power lines is widely varying depending both on the evolution of consumers (the consumers load curve) and on the operating conditions of the power system elements. For experimental analysis of the operating conditions of transmission overhead power lines, the equivalent diagram П, T or Γ, generally symmetrical, are used. The paper presents the particular operating conditions of the overhead power lines: no load and short circuit, which are important in practice, because to their associated phenomena. A 400 kV overhead power line is modelled using MatLab Simulink and the above-mentioned operating conditions are analyzed. The presented model is used in teaching activity during the power grids laboratory lessons for power engineering students of our university. The paper includes the conclusions related to the studies and the detailed results.