Minimization of the electricity bill of Brazilian consumers with PV system through the optimization of contracting demand and the orientation of photovoltaic panels

The objective of this paper is to carry out a study to reduce costs with the electric energy bill of the Federal Institute of Goiás - Campus Goiânia, with grid-connected PV system installed, by optimizing the contracting of active power demand and the orientation of the photovoltaic panels. The study is carried out through a case study and takes into account the effects of the Brazilian tariff structure, the local climatic conditions and the load curve profile of the consumer unit in question. The results have shown that, with the adoption of the blue tariff modality and using the optimized parameters, it is possible to reduce electricity costs in the analysed period by 12.68%. It is concluded that in order to obtain a greater economic benefit from the installation of a grid-connected PV system, one can not only focus on the maximization of energy production, it is necessary to take into account other factors such as the tariff structure, local climatic conditions and load curve.