Mar 2013
Electricity Transmission
Control of Cable Tunnel Ventilation (CCTV)
Live
Mar 2013
Unknown
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
None
Asset Management
£39,000.00
NGs cable tunnel network is a vital component of the power transmission grid within the London area, with the length of cable installed in tunnels scheduled to increase significantly in the coming decades. In order to achieve the required circuit ratings for tunnel cable installations, a degree of forced cooling is necessary. Typically this is achieved through the installation of large ventilation fans to force air through the tunnel network, removing heat generated by the operation of the cable system. Where high circuit ratings are required, very large fans may be specified to provide the appropriate flow rate of cooling air through the tunnel. The maximum emergency rating of the cable circuit can be achieved through operating the fans on a 100% duty cycle, however the costs of such operation (in terms of the electrical power utilised) represent a significant contribution to the operating costs associated with the tunnel. This project will investigate the feasibility of advanced ventilation control schemes which will be designed to ensure the minimisation of ventilation running costs while maintaining a high emergency rating on the cable circuits installed in the tunnel.

The following Work Packages will be undertaken:

  • Data Aquisition

  • Data Analysis

  • Control System Design

  • Control System Simulation

  • Reporting.
The aim of this project is provide a proposed advanced ventilation control strategy for force ventilated cable tunnels which will ensure the minimisation of ventilation running costs while maintaining a high emergency rating for the installed cable systems.