Análise dos impactos de diferentes modelagens da microgeração fotovoltaica nos estudos de planejamento de sistemas de energia elétrica de baixa tensão

Abstract

In recent years, many countries have invested and implemented initiatives to diversify their power plants to reduce the use of non-renewable energy sources. However, it is necessary to ensure that the insertion of renewable energies, such as distributed photovoltaic generation, does not compromise the operation of the electricity network. Thus, the way that the electrical systems’ planning studies consider this type of installation should be pertinent. In this context, the present thesis evaluates the impact of distributed photovoltaic microgeneration’ modelling on the studies of power flow regarding low voltage electrical networks and on the planning studies of electrical systems. Therefore, simulations of four scenarios, which assume different considerations in the modelling of distributed photovoltaic microgeneration, were carried out using computational tools as PowerFactory and PVSyst. The analysis shows that electrical quantities, such as the line charging, the electrical losses and the voltages vary for each studied scenario. The results show the relevance choosing the solar resource data and the load/generation dichotomy in the power flow results. Since these variations can influence planner decisions, the results of the analysis were compiled to generate a simple and useful procedure to assist in the preparation of the planning studies. Among the contributions of this dissertation, this proposed procedure excels due to its innovative character. Therefore, the importance of the modelling of distributed photovoltaic generation is evident in the studies of power flow and, consequently, in the power system analyses.