Recently, offshore wind farms have attracted more and more attention because of their greater energy capacity. To obtain the best performance from a wind farm, a technical and economic compromise between energy efficiency and overall investment must be established. The exploitation of this energy requires investments in the transmission of energy to the terrestrial network. Nevertheless, it is important to consider cheaper transmission solutions with less energy loss. There are two main technologies for alternative or continuous network transmission: HVAC and HVDC. In fact, HVAC is the most economic connection solution for short transmission distances and HVDC transmission method provides more advantages for distances exceed 100-150km.