National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Gas Distribution Networks
The breakdown pathways and kinetics of poly-dimethylsiloxane (PDMS)
insulating fluids are not fully understood, and the study and deeper
understanding of how these fluids behave under electrical stress may lead to
the identification of significant components which may be used to determine
the early determination of fault activity within silicone fluid filled terminations. It
is envisaged that with the chemistry fully understood, a much greater
appreciation of fault level and time to failure will be derived.
Furthermore, the identification of selective analytical markers of fault activity
will allow simple routine testing methods to be migrated to the contract oil
laboratory, enabling National Grid to look for fault symptoms in a similar way to
that already practiced for instrument transformers and bushings
To simulate, in the laboratory, the degradation processes seen in silicone oil
insulated cable sealing ends and to develop a sufficient understanding of these
processes to facilitate the analysis of samples taken from the field in order to
provide a measure of asset health.