Manutenção de linhas de transmissão: metodologia multicritério para priorização da correção de defeitos em linhas de transmissão

Abstract

In the electrical sector, interruptions in the transmission system due to unforeseen disconnections generate great inconveniences for utilities and society, in addition to high financial losses. Therefore, it´s established the need for the public electricity transmission service to be carried out with excellence and associated with high levels of availability of the assets. It´s confirmed that a great part of the unavailability of the transmission systems occurs in the transmission lines, which have a big variety and quantity of defects that need to be corrected before they evolve to failures. Thus, it is necessary to establish the criteria for prioritization of defect correction, in a scenario where, normally, the available resources are not sufficient to perform all necessary maintenance activities. The problem of prioritization of defects to be corrected in transmission lines was not observed in other studies, but it´s verified that the Multiple-criteria Decision Analysis methods (MCDA) are adequate tools for this development. This work is about establishing a methodology to prioritize the defects that must be corrected in transmission lines of a transmission concessionaire, through the MCDA Analytic Hierarchy Process (AHP). It takes into account the technical characteristics of the defects and their potential to cause a failure, in addition to the systemic importance of transmission lines and the regulatory impact of their unavailability. A useful tool for management of maintenance teams has been developed, which systematizes and facilitates the correct allocation of resources that are limited, objectively providing the sequence of defects that must be corrected by maintenance teams.