The general unearthing and sustaining of a refurbished HVDC system have always been a big concern to the involved parties. The HVDC conductions system has the benefit of conveying immense electric power over long distances with a minute quantity of voltage drop or electrical losses. This particular power system has thus become a standard option in the power industry about the transmission of power to long ranges. This paper seeks to examine specifics about HVDC, its devices, application and the study of the selected HVDC Applications.