METODOLOGIA PARA ANÁLISE DA COORDENAÇÃO E SELETIVIDADE DA PROTEÇÃO DE SISTEMAS DE DISTRIBUIÇÃO RURAL

Abstract

This work deals with improving the quality of power supply acting following RDR (rural distribution networks), proposing the development project model in RDR. The project has an implementation of selectivity and coordination of long transient protection and short-lived in rural distribution systems and consequently the reduction of corrective maintenance, working on the improvement of energy supply. The change consists of the fusible link component presentation, with technology similar to smart grid devices recloser to replace the equipment currently used in RDR selectivity and protection and their actions within the SEP. It presents the ways of structuring the RDR and the rules governing this tracking customer ND 2.2 CEMIG, NBR 14039: 2005 and BT - NBR 5410: 2004 and IEEE 242, which consists in choosing and parameter setting of the devices protection (fusible link). For the demonstration of the proposed device it was made a formulation for analysis of coordination and selectivity of the proposed device using the supercoord V2 software, with the ability to parameterize and display adjustment limit in recloses devices as model proposed in this work. What led the feasibility work and the choice of model protection equipment (fuse link) and model differential in comparison to current market models. We approach to modeling: fusible link device with recloses in protecting rural transmission networks where the same proof for his performance curve is an innovative equipment and demonstrates its superiority in solving problems currently presented in the distribution system. His performance had a way of reducing the so-called rural areas and a better quality in the continuous power supply in rural areasThe results are presented as coordenograma rises, which demonstrates the device superior to currently used. Curve graphs show agility in response to its actions and response to transient short and long term, in addition to being safe and isolate the network if the problem persists.The work demonstrates that an effective system of protection is required and is scaling properly, in order to quality, safety, reliability, speed, sensitivity to outbreaks and that there is always coordination between selectivity.