Projeto Executivo de SPDA de uma Subestação Distribuidora de Energia Elétrica Após Unificação e Modernização

Abstract

This work presents a case study in electrical power substations. It will be analyzed whether the Lightning Protection System (LPS) of a specific sector of the substation meets the requirements of the NBR 5419 (2015) and IEEE Std 998 (2012) standards, after the unification and modernization of two substations. For this analysis, a review of standards, literature, and specific websites is conducted, covering the following concepts: atmospheric discharges, elements of an LPS, risk analysis, and calculation methodologies for sizing. In the sizing of the capture subsystem, it was observed that NBR 5419 provides a comprehensive methodology for risk assessment and sizing. Regarding the IEEE standard, it was found that the rolling sphere method is efficient in protecting structures with complex shapes. In the verification of the analyzed LPS, it is concluded that the sector was fully protected without modification according to NBR 5419, but modifications were required to comply with the IEEE standard.