800 KV HVDC for Transmission of Large Amount of Power Over Very Long Distances

800 kV HVDC is economically attractive for bulk power transmission of 6000 MW and even 9000 MW per bipole over distances up to 3000 km. With the present progress of R&D converter equipment for 800 kV HVDC will be qualified within short. With proper separation and proper structure of the control and protection and auxiliary systems, the reliability and availability will be as good as, or even better than, for converters at lower voltages.