Inhaltszusammenfassung

The worldwide increasing amount of HVDC systems demands the implementation of cable systems. Especially, extruded HVDC cable systems and their prefabricated accessories are essential for a reliable energy transmission for the next decades. Those insulation systems require a deep understanding of the material behaviour and their interactions with system boundary conditions, such as temperature and electrical field strength. Especially, due to DC-specific effects, detailed investigations in ter...The worldwide increasing amount of HVDC systems demands the implementation of cable systems. Especially, extruded HVDC cable systems and their prefabricated accessories are essential for a reliable energy transmission for the next decades. Those insulation systems require a deep understanding of the material behaviour and their interactions with system boundary conditions, such as temperature and electrical field strength. Especially, due to DC-specific effects, detailed investigations in terms of electrical conductivity and space charge behaviour are important. Within this paper, a novel method for evaluating polymeric insulation interface configurations is described, considering the DC conductivity long-term behaviour. A general overview and evaluation of the long-term apparent DC conductivity is given, and an analytical mathematical description is presented. The impact of the individual material characteristics on the interface electric field distribution of a cable – joint configuration is investigated using a numerical field simulation. On the base of the obtained results, a generic relationship between interface electric field distribution and material-specific long-term behaviour of DC conductivity is concluded.» weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
4.42 - Elektrotechnik und Informationstechnik

DDC Sachgruppe:
Ingenieurwissenschaften