All major GB electricity utilities have fluid filled cable circuits on their distribution networks. These are mostly of the low pressure fluid filled type, typically designed to operate at 1 - 4 bar pressure with short term peaking pressures up to 6 bar. Over time these cables may begin to leak cable fluid and subsequently the cable pressure may drop and the cable insulation system (fluid impregnated paper or paper-polypropylene laminate) may eventually fail. In some cases the leaks may cause environmental contamination that is of concern to the network operator, and to the public.
The project seeks to exploit new developments in self-repairing polymers, resins and reactive chemical technologies for fluid systems, potentially capable of providing a repair function for a variety of cable sheath defects and damage types that may occur.
Timescales: 03/2016 - 06/2017