Sistema IOT para supervisão e controle de inversores com aplicação em microrredes.

Abstract

The implementation of microgrids is an efficient alternative for increasing the reliability of electricity supply, considering that they are composed of distributed generation systems, energy storage, and loads, which can operate connected to the power grid or completely isolated. As a result, they are also considered sustainable since they utilize renewable sources, such as photovoltaic, wind, or biomass energy, and they have the advantage of faster implementation, in order to postpone or avoid investments in large generating plants. Moreover, for microgrids to operate properly, the implementation of tools for the supervision and control of their components is necessary. In this sense, this work presents the development of a low-cost system for the supervision and control of photovoltaic and hybrid inverters, aimed at application in microgrids. For this purpose, the implementation of a microcontroller system in an industrial network (Modbus) is proposed, in order to allow efficient communication between this device and the inverters of a microgrid installed at the Federal Institute of Goiás (IFG) – Itumbiara Campus. Thus, the data obtained from this communication are processed and sent to specific interfaces, via Modbus and MQTT networks, which in turn enable the supervision and control functionalities of these devices. In this case, through the use of these resources, it becomes possible to perform in the microgrid the limitation of active power, reactive control, and the dispatch of energy stored in batteries, contributing to applications involving the control of consumption and injection demands, power factor, and reliability in intermittent generation systems.