The Effect of HVAC-HVDC Line Separation in a Hybrid Corridor

Increasing difficulties in obtaining new rights-of-way (ROW) for transporting electric power over long distances call for the development of additional transmission options to maximize the power transfer capability of a corridor. One such option is the sharing of the same corridor by HVAC and HVDC transmission lines (hybrid corridors). The proximity between HVAC and HVDC conductors causes interactions between the two line types. These interactions can produce changes in the electrical and environmental performance of a hybrid corridor from what would be expected if the two lines were acting independently. This paper presents the results of a sensitivity analysis relating the corona and field effects to the variation of the physical parameters of hybrid corridors, with the primary focus being on the separation of the two line types.