Desenvolvimento de estratégias de controle secundário de tensão em sistemas elétricos de potencia com a presença de recursos energéticos distribuídos

Abstract

The energy transition and the need for a safe and reliable power electrical system are essential for social and economic development. The electric power sector faces constant challenges to adapt to new technologies and integrate diversified energy sources, mainly due to environmental, economic, and social issues. In this context, microgrids emerge as a promising solution, allowing for the integration of multiple distributed energy generation resources and the possibility of operating either connected to or isolated from the main grid. This work focuses on modeling and analyzing the behavior of microgrids, highlighting coordinated voltage control and the incorporation of droop-controlled inverters. The proposed methodology utilizes the Full Newton Method to solve the power flow, aiming to calculate the reference voltage of the controllers and emulate the operation of the inverters. The study also covers different operating configurations of the converters, along with the secondary voltage control scheme. Tests were conducted in a 38-bus microgridconnected to the grid, with the algorithms validated using ANAREDE software, widely used in the electric sector for steady-state analysis. The results indicated the behavior of the system given the proposed converter operating configurations and the ability of the secondary voltage control to regulate the voltage profile, confirming the effectiveness of the proposed methodology.