Coordenação e seletividade de uma entrada de serviço compartilhada atendida em tensão primária de distribuição

Abstract

Full operating electric systems are always subject to problems which may cause supply instability, variation in power quality, and even interruptions in supply. Such problems, technicaly named as outages, may occur in random spots in the electrical network. The protection systems aim at reducing the impacts caused by electrical system outages. For that, the protection system must be properly scaled and parametrized, according to the current technical norms. The fulfillment of the requirements described in the technical norms of the distribution companies ensures the possibility of connection of the respective consumer unit into its own electric system. Based on the technical norms’ requirements of Companhia Paranaense de Energia Elétrica (COPEL), the present work aims at elaborating, coordenating and selectivity of a service entry in primary voltage of distribution, consumer units supplied with low voltage and medium voltage, the unit supplied with medium voltage having a diesel generator set and photovoltaic distributed generation, using MATLAB and Excel as programming softwares for data input interfaces. The results have shown that the developed routine succeeds at performing the coordination and selectivity calculations to respective case study as well as similar scenarios. However it cannot attend any situation due to, mainly, the possible typologies which may be adopted by the system, electric tension levels and contracted demand. It was verified that both softwares, Excel and MATLAB, may operate together, since MATLAB has funtcions for importing Excel spreadsheets.