Coordinación óptima de protecciones en alimentadores radiales con la presencia de generación distribuida

Abstract

Renewable energy sources market is growing, and distributed generation arises, whose application is focused mainly in electrical distribution systems. These additional sources provide great benefits to the network, but modify its traditional operation, especially for radial feeders. One of the consequences is the change in the levels of fault currents, because these sources contribute during an eventual short circuit, which requires an adequate reconfiguration of each of the protection devices installed in the system. This document analyzes a method of coordinating each of the protection elements, preserving, if possible, the entire initial network infrastructure, considering the constructive and operational restrictions of the relays, reclosers and fuses installed. The process is based on dividing the electric system into operating branches and, with a computational script, the time parameters that must be applied to each of the existing relays and reclosers are calculated. Finally, results obtained are analyzed to find the one that offers the best performance to guarantee adequate selectivity