DUAL UNDERGROUND CABLE SYSTEM FOR TRANSMITTING ELECTRICAL POWER

摘要

A dual system for electric power transmission laid underground comprises two three-phase compressed gas insulated transmission lines operating electrically in parallel each which is designed in the form of three symmetrically spaced phase conductors enclosed within a pressurized gas-filled metallic tube which serves to dissipate the heat losses into the surrounding earth. The metallic tubes of the two three-phase transmission lines are interconnected by heat-conductive metallic plates distributed along the length of the conductor installation whereby in the event of failure of one of the transmission line, the load carried by the other system can be increased substantially during the period of failure through utilization of the metallic tube of the failed lines for dissipation of a portion of the heat losses of the other lines remaining in operation.