Aloise, DanielMarques, Adriana Cavalcante2017-04-062017-04-062016-06-27MARQUES, Adriana Cavalcante. Revisão de tarifa do sistema elétrico brasileiro com a aplicação do modelo de redes da análise envoltória de dados. 2016. 132f. Dissertação (Mestrado em Engenharia de Produção) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2016.https://repositorio.ufrn.br/jspui/handle/123456789/22572The Brazilian electricity sector has shown different changes, since unbundling of companies to the creation of the regulatory agency (Aneel - National Electric Energy Agency), responsible for the economic regulation of the transmission and distribution segments. However, Aneel applies charging policies separately between the segments that make up the electrical system, not considering the relationship in the supply chain. In this context, this paper aims to propose a new model of the Brazilian electric system efficiency analysis in order to make the best-adjusted tariff review with the system reality. The segments of the industry (generation, transmission and distribution) were founded through a set of recurring variables in the literature to portray the processes carried out in the electrical system at the national and international levels. The conceptual model includes initially 12 variables divided into three dimensions: cost, productivity and quality. The sample includes 94 companies, consisting of in 16 generation companies, 28 electricity transmission companies and 50 distribution companies. The Decision Making Units (DMU) were considered the paths from generation to distribution, so that the sample contains 362 DMUs in total. In conducting the research analysis, a model was developed to evaluate the electrical system using the data envelopment analysis (DEA) to quantitatively identify the network efficiency level. To be able to represent the complexity of the electrical system, a unique grouping model was proposed and analyzed by Network DEA's model (NDEA) in three stages, each one simulating a particular segment of the industry, in order to identify the impacts between the processes and the causes of inefficiency. These stages of the network were evaluated to verify the performance of the companies in each segment and validate the model of constant returns to scale, through the classic models CCR compared to the NDRS used by Aneel. From this comparison between the classic models, the use of constant returns to scale model for sector analysis was validated. The results of the NDEA model point to the adequacy of the proposed method by performing the electrical system aggregate analysis, by presenting more discriminatory results than classic models. Furthermore, none of the paths have efficient companies in all of its three stages. However, it was possible to identify which links those companies should focus their investments to achieve better performance and which networks are its benchmarks, contributing to the decision-making and the efficient planning of companies. Finally, we identified the exogenous factors that influence efficiency, such as geography and size, thereby making possible to obtain a more appropriate tariffing regarding the reality of the sector, benefiting consumers, companies and the government.Acesso AbertoAnálise envoltória de dadosSetor elétrico brasileiroTarifasEficiênciaAjustes de tarifasRevisão de tarifa do sistema elétrico brasileiro com a aplicação do modelo de redes da análise envoltória de dadosmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA DE PRODUCAO