Uma Avaliação em Série-Temporal Quase-Estática da Capacidade de Hospedagem de Geração FV em Redes de Distribuição

Abstract

The increasing penetration of photovoltaic (PV) generation in Brazilian distribution networks has brought a set of operational, safety, and compliance challenges. In this scenario, maximum hosting capacity (MHC) assessment studies are necessary to evaluate the impacts of these systems on the operational states of electrical networks. Currently, there is a growing interest in this topic in the scientific literature, however, given the complexities and intermittencies involved, the subject still lacks lessons learned and definitions of best practices. This article aims to evaluate MHC in distribution networks through quasi-static time-series simulations and heuristic methods, so that the Volt/VAr control parameterizations for each hosting condition can be readjusted. A concept of PV generation center (PVGC) is adopted. A realistic case study is carried out on a 70-bus system, evaluating the network state at 10-minute intervals throughout a day, in two distinct scenarios: (i) with a PVGC closer to the primary substation, and (ii) with a PVGC farther away. The results show that there is a more pronounced increase in voltages and ohmic losses when the generation center is closer to the primary substation. Additionally, it was observed that MHC may be restricted more by branch loading limits than voltage limits, being 45% lower when the PVGC is close to the substation and 60% lower when it is far away.