Keywords:
critical microgrid, distributed generation, renewable energy
Abstract
The insertion of renewable sources in the electric power system (SEP) is in vogue, with the objective of meeting the demand for electric energy, mitigating environmental pollutants and achieving socioeconomic benefits. brought a new concept of electrical systems, the microgrids. A microgrid consists of the integration of distributed energy resources and loads, and can behave as a single controllable unit, being able to operate in the modes connected to the conventional grid or isolated from it. Mission-critical microgrids present themselves as an opportunity to add resilience and reliability to critical processes, that is, processes that are characterized by strict requirements for energy continuity, achieving a strategic connotation for different civil and military sectors. In this context, this article presents a review of the concepts, classifications, modes of operation and management of a microgrid with emphasis on critical microgrids. In addition, it presents typical cases focused on this application, including the conceptual scope of the power circuit and management logic of a microgrid under implementation in a Brazilian Launch Center, with an installed capacity of 3.125 MW of distributed generation.
