Metodologia para de desenvolvimento de projeto de subestação 69kv- 13,8kv em unidade consumidora de ensino superior

Abstract

The present work presents a methodology for the development of a consumer substation project at the Federal University of Santa Maria (UFSM), in which a feasibility analysis is carried out for the migration of the tariff subgroup of the current contract, A4, to the subgroup A3, both in the captive market. The methodology applied involved the collection of measured active power demand data and the consumption of electricity from February 2022 to February 2023, based on energy bills provided by the local Pro-Rectory of Infrastructure (PROINFRA). The data were compiled in an electronic spreadsheet program, enabling the generation of graphs and tables, and the simulation of the energy bill considering that the UFSM headquarters campus had a contract in force in subgroup A3 and blue hourly-seasonal alternative modality, in the market captive. The case study found that from a normative and, especially, financial point of view, there is full viability for migration. The expected savings in the selected period would be R$ 3,235,648.0 per year. The potential savings verified can be summarized in the signing of a new supply contract and demand a large financial contribution, to enable the construction of a private substation that allows the supply voltage to be in high voltage, equal to 69 kV that in 4 years the investment is paid, from generating savings for the university that is destined to analyze the study of the equipment and the electromechanical project of the 69/13.8 kV, 15 MVA aerial step-down substation, on the Santa Maria Campus of the Federal University of Santa Maria, following substation standards. All these sub-processes are described, a proposal for an electromechanical arrangement is presented for the substation on the Campus of Santa Maria with a line input of 69 kV, single bars in AT and MV, initial power of 15 MVA, with the possibility of expansion and three MT feeders. A descriptive memorial of the electromechanical project is also prepared, with the technical specification of the equipment to be acquired and a budget of the total cost of the substation. Its main constituent equipment is presented, as well as its characteristics to be specified at the time of purchase. The implementation process of a substation is subdivided into subprocesses ranging from planning to energization