Estudo de capacidade de hospedagem de geração fotovoltaica na rede de média tensão do Campus do Pici

Abstract

The growth of distributed generation in Brazil and worldwide has provided technical, economic, and environmental benefits to energy utilities, consumers, and society in general. However, the expansion of Photovoltaic Distributed Generation is proportional to the negative impacts on the energy distribution network, including: voltage rise to prohibitive levels, increased losses in conductors, interference with protection coordination, and others. Due to these factors, studies are required to understand the impacts caused by the growth of Photovoltaic Distributed Generation on distribution systems. Knowledge about these effects on the distribution network brings significant benefits to energy utilities and consumers, as it ensures the quality of the electricity supply. The study of the hosting capacity of distribution networks, for example, allows the implementation of PV DGsystems in a planned manner, without negative impacts on the quality of energy supplied to consumers. The aim of this study is to present the results of the STUDY OF PHOTOVOLTAIC GENERATION HOSTING CAPACITY IN THE MEDIUM VOLTAGE NETWORK OF THE PICI CAMPUS, as well as to present the maximum hosting capacity for distributed generation for the three feeders of the Campus. The methodology for the development of this project includes modeling the Pici Campus network in the OpenDSS software, developing a Python algorithm capable of allocating PV DG systems to 30% of the buses on each of the three feeders of the campus network, and increasing the power of the PV DG systems until overvoltage violations occur at the buses or overloads in the conductors. The data obtained from the simulations of each feeder for the scenario of high load (weekday) and low load (Sunday) were then analyzed to verify the hosting capacity for different load levels. As an analysis criterion, it was defined that the hosting capacity of the feeders should be based on the levels of penetration of photovoltaic distributed generation for the light load scenario, as these do notresult in voltage violations or overloads in the conductors for both scenarios.Thus, the hosting capacity of the feeders was 4.63 MW for feeder 1, 4.75 MW for feeder 2, and 4.92 MW for feeder 3. Finally, it is concluded from the results obtained that thehosting capacity study is of fundamental importance to determine the safe level of PV DG integration and assess its impacts on energy distribution systems.