Impact of connection point of alternative energy sources to the size of short circuit current in the distribution network

Nowadays it is effort to use as much as possible renewable (alternative) sources of electricity based on the sun radiation (biomass, hydro, wind or solar power). These plants are environmentally friendly and do not pollute the environment as much as it was in traditional coal power plants. These sources are at present in a large number were connected to the existing distribution network. Due to the increase of these sources in distribution networks is necessary to examine their impact on the overall operation of the network as in normal operation as well as a fault condition. The aim of this paper is to point out of impact location of connection newly built alternative energy sources, especially biomass power plants (BPP) to the size of short-circuit current during fault in the distribution network. This paper describes possible connection of these sources into power system, short theoretical knowledge for short circuit calculation in distribution network and simulation in program Matlab / Simulink