نتایج جستجو برای: dc microgrids
تعداد نتایج: 58452 فیلتر نتایج به سال:
This work analyzes interlinking converter control in hybrid AC/DC microgrids. The paper addresses the state-of-the-art general microgrid structure. key power electronics topologies are used as bidirectional interface converters AC and DC parts. Different structures of microgrids categorized, followed by classification main functions, their strategies, techniques a summary positive negative aspe...
The significant benefits of DC microgrids have instigated extensive efforts to be an alternative network as compared conventional AC power networks. Although their deployment is ever-growing, multiple challenges still occurred for the protection efficiently design, control, and operate system islanded mode grid-tied mode. Therefore, there are research activities underway tackle these issues. ch...
This paper provides an overview of modern feedback control methods for the voltage regulation in DC/DC converters DC microgrids. Control objectives and practical restrictions are defined used as indicators analysis performance assessment methods. After presenting concept each method, advantages limitations converter applications discussed. The main conclusions this can be recommendations select...
The electricity market and environmental concerns, with wide utilization of renewable sources, have improved the diffusion of distributed generation units changing the operations of distribution grids from passive networks to microgrids. A microgrid includes a cluster of electrical loads, energy storage devices and microsources, which provide both power and heat to their local area. A microgrid...
DC microgrids have advantages over AC in terms of system efficiency, cost, and size. However, a well-designed overcurrent protection approach for remains challenge. Recognizing this, this paper presents novel differential evolution (DE) based framework microgrids. First, simplified microgrid model is adopted to provide the analytical basis DE algorithm. The does not sacrifice performance criter...
The dc microgrid should remain connected to the ac utility grid support stability during faults. However, bidirectional power flow between and will cause either high-voltage or low-voltage faults at bus. It is difficult control a large number of heterogeneous sources bus ride through fault, as well exporting reactive current grid. This article proposes chopperless fault ride-through strategy fo...
• Considering robust desired performance and stability for the islanded DC microgrids. Preserving robustness under several uncertainty sources, by modeling all uncertainties as a new polytope. Optimal designing local voltage controllers which results in optimal performance. Modeling interaction terms between DGs disturbance input to achieve decentralized structure. The scalability of design pro...
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