Análise dos sistemas de aterramento em repetidoras no solo do Estado do Tocantins: um estudo de caso

Abstract

This research project aims to analyze the grounding systems in repeater stations (RS) of an electric utility company operating in the State of Tocantins. To this end, a comprehensive study on electrical grounding and RS was conducted. Subsequently, 36 RS were cataloged by collecting their operational information, such as location data, height, type of structure, grounding resistance, number of equipment, shielding format, and equipment failure data. Additionally, an analysis of the collected RS information and an investigation of the RS failure data were carried out using fault tree analysis (FTA). A failure profile was obtained, and a fault tree was constructed, allowing the determination of which components failed the most, the main associated factors, and the base, intermediate, and top events of the fault tree. Furthermore, based on the study conducted, technical recommendations were made regarding soil improvement, the grounding system, and standardization for collecting failure data. Finally, through this research, it is possible to understand the nature of the failures that occurred in the RS equipment related to the grounding systems, thus providing information that can assist in decision-making processes that may lead to reduced damage and costs, continuity in communications, and increased system reliability.