Prysmian Group reports that it has achieved two record-breaking power transmission milestones with the announcement that it has successfully developed and tested its new 700 kV MI-PPL (mass impregnated type) and 600 kV extruded (XLPE type) cable systems for high voltage direct current applications.
"It is the first time in the cable industry that voltages at these high levels have been achieved", stated Massimo Battaini, senior vp Energy Projects at Prysmian Group. "These are also the first developments in cable technology that enable HVDC power transmission systems beyond 3 GW per cable bipole, and as such are capable of more than double the power transmission capability of DC cable systems currently in service".
These achievements, says Prysmian, prove the robustness and reliability of both XLPE and mass impregnated PPL technologies for HVDC applications to the highest voltage levels.
These voltage upgrades allow an increase in the power transmission capability by up to 15% beyond that currently achievable by 525 kV XLPE technology and high performance PPL 600 kV technology.
Prysmian says that it has achieved these new operating voltages by exploiting more fully the properties of the materials it uses and developing appropriate manufacturing processes that can meet exacting technological standards during production, resulting in complete systems of cable and accessories with the best dielectric properties.
