Proposta de instalação de cabo de guarda para mitigação dos disparos na linha de alta tensão de 110 kV da CL9 (SE-Chicumbane – SE-Lindela)

Abstract

This report was based on the professional internship at EDM – Southern Transmission Directorate. The project consists of dimensioning the OPGW guard cable in a 110 kV high voltage transmission line designated CL9, which connects the Chicumbane substation to the Lindela substation, in the southern region of Mozambique, where the previously installed cable is corroded due to adverse temperature conditions. The corroded cable of the line was made of steel with an aluminum core, but this project uses the OPGW, a cable that has several advantages, such as better mechanical resistance, greater resistance to corrosion, less weight compared to the steel cable with an aluminum core, and has two functions (guard cable and information transmission), since it has a fiber optic core. However, a theoretical basis is initially presented regarding high voltage transmission lines, followed by a descriptive and justification report for the project, i.e., mechanical calculations for the OPGW cable are carried out. These calculations allow us to know the maximum and minimum tensions to be applied to the cable, assess the stability of the respective supports that will support the guard cable and finally an approach is made to the impacts that this type of project has on the environment in which they are inserted, as well as prevention and minimization measures.(TRADUÇÃO NOSSA)