Sep 2018
Electricity Transmission
SMART GEO GRID
NIA_NGTO027
Complete
Sep 2018
Dec 2018
National Grid Electricity Transmission
Judith Robinson
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Network Innovation Allowance
ET - Network improvements and system operability
Asset Management
£55,095.00
The material surrounding buried electrical cable is required to dissipate heat at a sufficiently high rate to prevent thermal overloading. In design, conservatism can be applied to attempt to prevent critical situations from arising. For example, the cable spacing can be chosen with an appropriate factor of safety. However, soils are highly complex materials, possessing material properties that are not constant but rather vary temporally and spatially, sometimes by several orders of magnitude. Envisaging and accounting for all eventualities is a highly challenging and potentially costly task. As an example, both the thermal and electrical resistivities of soils are highly dependent on water content; in the event that a soil mass dries out, both its thermal and electrical resistivities will rise considerably, limiting its capability to dissipate heat and electricity.

This project has the following objectives:

  1. Develop numerical models of the soil condition and link this to the thermal loading of underground cables.
  2. Validate the models with experimental results from an equivalent laboratory setup.
  3. Train software to provide predictions of the soil condition; allowing a forecast to be made.
  4. Develop a costed proposal for deploying this technology in the GB network.
The project has the following objectives:
  1. Develop numerical models of the soil condition and link this to the thermal loading of underground cables.
  2. Validate the models with experimental results from an equivalent laboratory setup.
  3. Train software to provide predictions of the soil condition; allowing a forecast to be made.
  4. Develop a costed proposal for deploying this technology in the GB network.