ESTUDO DE CASO DE DIMENSIONAMENTO DE UM SISTEMA DE ATERRAMENTO PARA UMA USINA FOTOVOLTAICA DE MINIGERAÇÃO EM RIOLÂNDIA/SP

Abstract

With the need to apply new sources of renewable energy all over the world, photovoltaic solar energy emerges as one of the best options, especially in Brazil. This research aims to develop a case study for designing a grounding system in a photovoltaic plant (UFV) of minigeneration, aiming to detail all the procedures for simulation and analysis of results. The system will be simulated with the aid of the computational tool Tecat plus (version 6), and will have the purpose of maintaining the admissible touch and step voltages in the UFV region and with the greatest possible reduction of electrodes. The specific objectives are: to calculate the admissible step and touch voltages; sizing the cable and types of materials for connection; set up a proposal initially for the UFV network; make adjustments for the final configuration, making sure that all adopted parameters are admissible. With the results found, it can be said that the places where the touch potentials were above the admissible have nothing to be touched. Therefore, the presented geometry follows all safety requirements. With the new geometry presented, through simulation in the TecAt plus Software, a grounding resistance equal to 0.52 Ω was calculated. In the main equipment: Skid, control room and primary cabin, there is a high turnover of people and they must be analyzed more carefully.