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چکیده
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Nowadays, the use of renewable energy sources has gained more attention due to their lower pollution and cost compared to traditional fossil fuel generators. Microgrid (MG) structures are used for better management of these resources. This article focuses on power control in three-terminal AC/DC hybrid MGs. For this purpose, a network backup converter is used to improve power sharing and reduce power quality disturbances. The components of the MG include distributed generation units, AC loads, DC loads, energy storage system (battery), and parallel connecting converters. In the studied topology of AC/DC hybrid MG in this article, there are two main converters: a grid-forming converter that acts as an intermediary converter and is used to control the MG voltage, and a VSC converter that is located between the DC link (including the DC MG and battery) and the AC MG. In this article, a control system is implemented for a hybrid MG and simulations are performed in MATLAB software for four different scenarios related to active and reactive power of the MG and loads. Simulation results show that the energy management system and power control in the AC/DC hybrid MG have reduced harmonics and improved system reliability in the MG.
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