Interferências eletromagnéticas por descargas atmosféricas em redes de distribuição blindadas (RDI) que utilizam equipamentos não blindados

Abstract

The current needs of the electrical system requirements are associated with greater reliability, security and system performance. In this context, the application of isolated distribution networks in densely urbanized areas is becoming increasingly common. In this new demand, an important barrier technology to be overcome concerning the use of equipment unshielded system isolated in medium voltage to enable maneuvering and de-energizing system for intervention in case of maintenance. Thus it is important to evaluate the electromagnetic interference by lightning armored distribution networks that use unshielded equipment, specifically the disconnect switch single fase, taking into account these surges that can cause breaks in the insulation equipment and therefore accidental shutdown of the electrical system. The methodology of work was based on review of the configurations of interest in medium voltage networks and the study of induced stress results presented in papers [Silveira 2006, Silveira, Silveira 2007 and 2010]. Based on this research, we attempted to trace sensitivity analyzes focused on the problem investigated. Conclusively the results allow the awareness to take measures to protect against surges on unshielded structures. This paper links the concepts and research findings for application in systems still poorly studied.