Análise da influência da geração distribuída fotovoltaica na proteção de sistemas de distribuição de energia elétrica

Abstract

Protection systems are fundamental elements in the conception of any electrical project. In the area of power system distribution, they are responsible for ensuring the service quality and supply reliability. Thus, overcurrent relays in conjunction with circuit breakers are basic elements used in several protection schemes. In recent years, a significant increase of the distributed generation has occurred in Brazil and, as a result, several studies have emerged with the objective of verifying the impacts of this technology on an electric power system. In this way, this work has as main objective the analysis of the influence of distributed photovoltaic generation in the optimal overcurrent relays coordination (phase time unit). For this, two very powerful tools were used, OpenDSS connected with the Python 3 programming language. The circuit utilized as a case study was the IEEE 13 buses, and the algorithm developed in this research used depth-first search techniques for automatic definition of relay pairs, as well as using metaheuristic tools for coordinating the protective devices. The data obtained were satisfactory, since the parameters to guarantee the coordination suffered variations when comparing the circuit without and with distributed generation. In addition, the depth-first search algorithm developed throughout the work proved to be very promising, allowing the analysis of different types of electrical systems modeled in OpenDSS.