Energy losses of superconducting power transmission cables in the grid

One of the obvious motives for development of superconducting power transmi ssion cables is reduction of transmission losses. Loss components in superc onducting cables as well as in conventional cables have been examined. Thes e losses are used for calculating the total energy lasses of conventional a s well as superconducting cables when they are placed in the electric power transmission network. It is concluded that high load connections are neces sary to obtain energy sating by the use of HTS cables. For selected high lo ad connections energy saving of 40% is expected. It is shown that the therm al insulation and cooling machine efficiency are the most important loss el ement in a superconducting cable system.