Estudo de viabilidade técnico-econômico da qualidade de fornecimento de energia elétrica para a vila de Jericoacoara

Abstract

The constant growth in electricity consumption demands a continued maintenance and sometimes the need for an expansion in the electric power distribution network to ensure a safe, a reliable and a quality supply. The Vila de Jericoacoara, a tourist attraction of unmistakable natural beauty, located on the Costa do Sol of Ceará, attracts around 600 thousand tourists per year and a great volume of new enterprises. The village is surrounded by the National Park (Parna) of Jericoacoara, protected by federal law, and as such, some environmental protections are imposed on the village's governance, for example, there is no public lighting and the electricity grid is underground. The village of Jericoacoara is served by a single feeder in 13.8 kV from the substation of the city of Cruz, a city of the region, and on reaching the village, the feeder is divided into two underground circuits to supply its consumers through 13 downstream substations of 13.8 kV-380/220 V. The demographic explosion has caused a disorderly growth, not being different for the electric network that serves the town and region. This work aims to evaluate the current conditions of the distribution network in medium and low voltage, showing its operational limitations, and to propose three possible alternative solutions. The proposed alternatives are: i) the construction of a high voltage substation (69kV-13.8kV) in the village; ii) the expansion of the Cruz substation installing another feeder; iii) alternative ii associated to the displacement of some large strategic customers to medium voltage. All the alternatives consider the modernization of the electric network in its different voltage levels. Finally, the technical, economic and environmental aspects of the alternatives are presented. The Windmil software was used for the technical evaluation of each alternative. Also, all of them indicated technical feasibility, being the first one, the one with the highest cost and the one presenting biggest barriers by the environmental agencies, and the third one, the one with a lower cost involved. A concessionaire in charge of the Vila de Jericoacoara power grid has made an effort to improve the network and is in the process of development, a solution very similar, technically, to alternative iii), launched this year, to be implemented by the end of 2018.