Calculation of power supply for electric railway distribution system

In paper are described three algorithms used in traction calculation (simulator of train movement, forming of electric power network and power flow calculation). These algorithms are implemented in the method for simulation of electric railway system, so it is possible to create simulation for various types of locomotives, which are present in Croatian Railways, and for various conditions on railway track sections. Algorithms are developed in C++ program environment. Graphical descriptions of results are shown in the end.