Hierarquização de alimentadores para fins de manutenção utilizando análise multicriterial

Abstract

The system of distribution of the power utility started to face new challenges with the regulations of the Brazilian electric sector through the National Electric Energy Agency (ANEEL). The agency, through resolutions and normative started to supervise the service offered by power utility to consumers. In face of this supervision of the distribution system has to be monitored and how is the biggest responsible for interruption of supply of energy to consumers, it has become important for investment as well directed searching for a reliable service. Constant interruptions and of great duration has passed to be penalized by ANEEL. Whereas the penalties imposed, utilities need to invest in preventive maintenance of its distribution system, appearing then a problem of difficult solution: the problem of operational planning, which in most cases, aims to minimize the sum of the costs. The programming and implementation of maintenance activities is one of the main issues involved. Where to perform the maintenance investing the limited resources available so as to improve the quality of energy supplied to the customer is the proposal of this work. Will be given a ranking showing which feeders among the studied are most recommended to perform maintenance actions, considering criteria for quantitative nature. It is a problem of aiding decision-making involving multicriterial analysis. For the solution will be used the AHP, Analytic Hierarchy Process, proposed by Thomas l. Saaty. In application of the method you will use the data of four rural distribution feeders, in the Energy Cooperative and Rural Development COPREL LTDA (COPREL); all of the same substation, located in the municipality of Cruz Alta, Rio Grande do Sul. The proposed algorithm allows taking into account several operational characteristics of the system and provides the possibility of using the expert opinion of the company. These experts are the own officials, technicians and engineers responsible and who have sufficient experience to contribute in the process of solving problems. This work explores two ways of obtaining the ranking of feeders. The first exploited is the exact calculation of eigenvalues of matrices and vectors and autos logo the following is the approximate method, allowing a comparison between the two possibilities for calculation. The chosen methodology exposes the feeders ordered by importance according to the criteria set by the company. These feeders listed according to the order of importance are where should primarily occur on maintenance activities. It is noteworthy that the ranking obtained prioritizes the feeders where should be carried out the maintenance activities.