Sistemas multiagentes aplicados a microrredes em corrente contínua com ênfase nas interfaces de comunicação em um ambiente de cossimulação

Abstract

This thesis presents an in-depth investigation and analysis of a multi-agent system designed to coordinate the operations of a direct current microgrid connected to the main grid, composed of various power converters and loads. The primary objective of this system is to increase the microgrid’s stability through the active management of the state of charge of the energy storage unit, in this case, a battery bank. The multi-agent system plays a critical role in providing real-time information to the rectifier/inverter, which provides the interconnection between the microgrid and the main grid, enabling precise control of the current injection into the direct current bus based on sensor data collected by the converters integrated into the microgrid. On the other hand, surplus generation from the microgrid is exported to the main grid. This thesis explores a simulated test scenario in a co-simulation environment. A technique is proposed that aims to adapt the agents’ update rate to the multi-agent system in order to mitigate interference caused by delays in the communication network. Two delay scenarios are simulated: 0.84 ms and 46.0 ms, at which point the agents begin updating the multi-agent system at rates of 65 Hz and 16 Hz, respectively. The simulated system produced satisfactory results, highlighting the effectiveness of the multi-agent system in improving operational stability, microgrid performance, and the proposed update rate adaptation technique. Scenarios are simulated in which the microgrid is connected to the main grid, as well as isolated. These successful tests pave the way for further research and development in this critical area of energy management and microgrid control. The analysis of data from the system’s operation is based on reports generated from a database that stores microgrid operational information, as well as data generated by the individual simulators that are part of the system.