Fuzzy Output Feedback Control for Interleaved Floating Dual Boost Converter (IFDBC) Interfacing DC Microgrid with Constant Power Load

Abstract

The present investigation aimed to develop a novel fuzzy output feedback control strategy for interleaved floating dual boost converters (IFDBC) interfaced DC microgrid with a constant power load. In this study, a hybrid fuzzy controller in tandem with a non-linear observer was proposed to mitigate the adverse effects of constant power loads on the system's stability, thereby ensuring large-signal stability and reducing voltage undershoot and overshoot. Furthermore, the proposed controller was designed to enhance the system's response speed and robustness against various disturbances. The primary focus of this study was the simulation of the proposed IFDBC converter fed by a constant current source, which is representative of a constant power load. The results demonstrate that the overall performance of the system exhibits satisfactory behavior against gradually applied changes and disturbances, with reliable outcomes. Moreover, the proposed structure is not only suitable for high-power loads, but also applicable for loads with low and limited power that are highly sensitive to voltage fluctuations, where even small changes in voltage can significantly impact their performance.