Three-Conductor Compressed Gas Cable Optimization

摘要

The research and development program is described for a three-conductor compressed gas-insulated transmission line (CGIT). This includes the design and optimization of the sheath, conductors, post and conical support insulators, and compressed gas insulation system. Calculations were made of the transient short circuit forces on the conductors and insulators. Two prototypes were made of a new design of 362 kV three-conductor system of buried rating 2000 A. The system was constructed by extruding the aluminum sheath in three segments, supporting the conductors on post insulators in each segment, and then welding the three segments together to form the completed CGIT section.