Software para realização de estudos de proteção e seletividade para entradas de serviço

Abstract

The present work aims to develop software to aid in the design of service entry electrical projects served in primary distribution voltage linked to the energy distribution concessionaire of Paraná (COPEL). The methodology consisted of creating an interface for inserting data from the equipment present at the service entrance and from the impedance chart of the concessionaire ­ up to the point of delivery. As a result, the software provides the symmetrical and asymmetrical short­circuit values at the connection points with the electrical network, also at the input and output of one (or more) power transformers and at the connection with the mini­generator typified in this study. The results obtained for the fault currents will be stored in PDF files and can be used by the designer for the dimensioning of the electrical installation. The protection coordinate charts can be performed interactively, so that the protection curves of the equipment can be configured by the trial method until the protection adjustment curves are ordered so that the choice of protection equipment can be correctly performed. The software results were validated with the Power World and ETAP (Electrical Transient Analyzer) programs. The conclusion was that the developed software presents the results in a valid way and the values can be used by the designer so that it is possible to configure the equipment in order to guarantee the coordination and selectivity of the project. As future work, it is suggested to expand the geographic region of service.