Program for calculation parameters of power systems during Short-circuit

摘要

This paper discusses about program created to solve a short - circuit ratios in the Power System according to Standard IEC 60909. One of the main subject is describing short-circuit current in system with currents without attenuation alternating component and short-circuit current in system with currents with attenuation alternating component. It solves short-circuit ratios in complex network with the possibility to observe a partial results. This article also brings to public a comparison of results taken from sample examples solved by the program which gives the relevant outputs. Such program outputs are needed for design and optimal set up of protective devices in the Power System.