Análise probabilística da capacidade de hospedagem de geração fotovoltaica em uma rede de distribuição residencial utilizando inversores inteligentes

Abstract

The high penetration of photovoltaic generation in the grid can cause overvoltage at the connection point. In this context, control functions embedded in smart inverters, such as Volt-var and Volt-Watt controls, have emerged, as well as the possibility of using both functions combined in the Volt-var-Watt mode. This dissertation evaluates the potential of Volt-var and Volt-var-Watt controls in regulating voltage and increasing the hosting capacity of photovoltaic generation in a residential distribution network in Belém-PA, considering various penetration levels. For the study, probabilistic power flow is performed using Monte Carlo simulation through the COM interface of OpenDSS with MATLAB. Solar irradiance and load consumption profiles are probabilistically modeled using probability density functions based on real data. The results show that, without control, voltage violations occur from 50% of photovoltaic penetration. The Volt-var control increases the hosting capacity up to 70%. The combined Volt-var-Watt control eliminates the probability of overvoltage at high penetration levels and slightly reduces energy losses, significantly improving voltage quality in steady-state conditions.