ANÁLISE DO FUNCIONAMENTO DA PROTEÇÃO EM LINHA DE TRANSMISSÃO DE 230 kV: ESTUDO DO RELÉ DE RELIGAMENTO AUTOMÁTICO APÓS CURTO CIRCUITO BIFÁSICO

Abstract

The protection of transmission lines is essential to ensure the continuity and reliability of electricity supply, minimizing interruptions and economic losses. Therefore, this study aims to analyze the performance of protections in a 230 kV Basic Grid transmission line, part of the National Interconnected System, with an emphasis on the operation of the automatic reclosing relay under two-phase short-circuit conditions. The research, based on the Network Procedures of the National System Operator (ONS), addresses Submodule 2.11, which establishes technical criteria to ensure the safety and efficiency of the Electric Power System (SEP). The study analyzes operational data collected before, during, and after disturbances at two substations, assessing the compliance of the systems with the minimum protection requirements and identifying factors impacting performance, such as response time and system stability post-failure. The results confirm that the analyzed protections operate within the parameters established by the ONS, while highlighting the need for improvements in the automatic reclosing system to minimize the impact of faults and maximize network reliability. Practical contributions include suggestions for performance optimization and continuity of energy supply.