Desenvolvimento de um sistema auxiliar ativo para supressão de oscilações decorrentes da conexão de CPLs em microrredes CC

Abstract

The intensification of the researches to new renewable and sustainable ways to generates electrical energy between with the advances in power electronics contribute to improvement of the DC microgrids as well as the applications. However, several problems were surged that may compromise the performance and stability of the system, e.g., the connection of the constant power loads (CPLs) in DC microgrids, that causes a reduction in stability margin due the undesired oscillations in regulated DC bus. In this context the design of the auxiliary control loop that is based on the project of the power stabilizer system (PSS) - that is applied in synchronous machines connected in the infinity bus aiming to damper the electromechanical low damped modes - are proposed in this work to application in DC microgrids. However the auxiliary control loop is rewritten in the $\mathcal{H}_{\infty}$ optimization problem and developed in LMI format aiming to ensure the robust stability and performance of the system.