This project will carry out analysis on all, 33kV, 66kV and 132kV solid cables within UK Power Networks’ DNOs and create a HI model for all solids cables operating at, 33kV, 66kV and 132kV.
What is the project about?
This project will carry out analysis on all, 33kV, 66kV and 132kV solid cables within UK Power Networks’ DNOs and create a HI model for all solids cables operating at, 33kV, 66kV and 132kV.
How we’re doing it
The project will review fault history of solid cables to identify how prioritisation of investment can be made to reduce CIs and CMLs. It is planned this will be carried out by:
Collation of all recorded faults on the network
Extraction of all data on cables (GIS, asset registers, cable loading history)
Analysis of faults against cable type (construction type, location, voltage, age, type of lay, historic loading)
Identification of factors that affect the likelihood of failure of solid cable
Following analysis of historic faults and identification of solid cable failure factors
Development of model to input all current data on cables (construction type, location, voltage, age, etc.) to calculate prioritisation of replacement for cables.
The above analysis will be based on faults at EHV voltages, to enable sufficient data to be collected for statistical analysis.
What we’re learning
Learning that will be shared with other DNOs is expected to include:
An improved understanding of causes of failure of solid cables;
A method by which other DNOs prioritise replacement of solid cables; and
A method to reduce CI and CMLs that is cost beneficial to DNOs and customers.
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