Investigations on high gain converter topologies for wind energy connected dc microgrid

Abstract

The operation of the electrical grid has been advancing in recent times owing to the extensive development of renewable energy sources and the associated power electronic systems, digitalisation of the circuits, and other sophisticated features. All these growths have led to modern electrical systems based on Direct Current (DC). DC power systems are emerging as a promising alternative in many applications, which include distributed energy sources like solar, wind, Energy Storage Systems (ESS), smart buildings, distribution networks, remote telecom systems, and the presently growing transport electrification like Electric Vehicles (EVs). newlineDC microgrids powered by renewable sources are gaining prominence owning to their high efficiency reliability, and adaptability when compared with the traditional AC electric grid. Moreover, conventional AC systems need synchronisation and control of harmonics, reactive power, and frequency. DC distribution provides a high voltage at reduced current, losses, cable costs, and improved efficiency. So renewable sources such as wind turbines, solar, fuel cells, and micro-hydro systems provide the distributed generation systems with variable low voltage (12 48 V) levels that can be integrated with higher voltage (300 400 V) levels of microgrids as the data center industries aim to standardise their system at 400V. Moreover, from the renewable distributed generation system, excess energy is stored either in batteries or injected into the primary grid. newline newline