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Performance evaluation and failure mode analysis of a long-term ageing test on HV submarine cables with tree-retardant XLPE insulation and factory joints

Abstract

The use of TR-XLPE for the insulation of a wet design
submarine cable has been a widely adopted design,
however CIGRE TB 722 requires a long-term ageing test
to qualify wet design insulation.
Currently very few information is available in the literature
regarding the long-term performance of cable systems
combining factory joints and wet design.
This paper presents the results of a wet ageing test
preformed according to the recommendations of CIGRE TB
722 at 500 Hz in salt water (Regime B). The acceptance
criteria were met, no breakdown during the water ageing
occurred. In the final AC breakdown test, three samples out
of six experienced a breakdown of the insulation above the
set target, the remaining reached the testing equipment
working limits.
KEYWORDS
Wet ageing; CIGRE TB 722;TR-XLPE wet cable; inter array
cable; factory joints.

Category

Academic chapter

Language

English

Author(s)

  • Francesco Caslini
  • Marco Canova
  • Enrico Cazzulo
  • Francesco Piotti
  • Alessandro Trolli
  • Hallvard Faremo

Affiliation

  • SINTEF Energy Research / Elkraftteknologi
  • Italy

Year

2023

Publisher

SEE

Book

Jicable'23 - 11th International Conference on Power Insulated Cables, Lyon - France 18-22 June 2023 : proceedings

ISBN

9782959042409

View this publication at Norwegian Research Information Repository