Kósa, János ÁrpádYu, Yue Yue Jr2019-11-132019-11-132019-11-13http://hdl.handle.net/2437/276086In this thesis, I have worked on theoretical calculation for short circuit current and used Matlab program to examine the short circuit to ensure the right parameters that I chose as well. There is a given grid, I calculated the parameters for switch gears. Later the grid will develop. For this reason, I calculated the maximum opportunity of development of the grid without changing of air coils and examined more possibilities by using Matlab program.46enPower SystemMatlabDEENK Témalista::Műszaki tudományok::Villamosságtan