The marine tidal energy is a promising renewableenergy source as it presents many advantages compared to otherrenewables, such as long-term predictability and high powerpotential. Thanks to its advantages, numerous projects havestarted all around the world in order to exploit this source, butonly few projects have reached the stage of grid connectionbecause of the harsh marine environment characteristics. On thesubject of this new emerging area of research, this paper reviewsthe marine tidal

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... er extraction systems fundamentals startingfrom the energy resource to the power electronic devices used forgrid connection, and reports some main projects in the world andrecent works in this scope. Also, the problems related to themarine environment have been highlighted