High Voltage AC (HVAC) and High Voltage DC (HVDC) Transmission Topologies of Offshore Wind Power and Reliability Analysis

High Voltage AC (HVAC) is the standard transmission system for short distances, while High Voltage DC (HVDC) is a popular solution for the long-distance transmission of offshore wind power generation. An HVDC transmission system has an increased commercial cost due to the addition of power converter stations; therefore, the efficient design of offshore wind power transmission systems and their reliability are critical for the smooth operation of the transmission grid and improved cost-effectiveness. In this paper, the simplified topologies of offshore HVAC and HVDC transmission systems have been studied and compared based on their reliability using fault tree analysis (FTA).