Close
Forgotten Password?
Login?
Register Me
Home
About
Contact
More
More
Network Operators
Funding Timeline
LCNI Presentations
Annual Innovation Summary
Funding Documents
Document Templates
Events
Login
Home
About
Contact
Network Operators
Funding Timeline
LCNI Presentations
Annual Innovation Summary
Funding Documents
Document Templates
Events
Project Details
R
eport
pt
P
rint
rn
D
ownload
/L
Save
Share
Share
Facebook
Twitter
Google
Electricity Transmission
Project Details
Documents
Ideas for future projects?
Sep 2013
Electricity Transmission
Cables with Long Electrical Sections
Reference:
Status:
Live
Start Date:
Sep 2013
End Date:
Unknown
Funding Licencee(s):
National Grid Electricity System Operator
Contact:
National Grid TO Innovation Team
Click here to send a question to the contact.
Funding Mechanism
Innovation Funding Incentive
Research Area:
None
Core Technology(ies):
Gas Distribution Networks
Estimated Expenditure:
£342,000.00
Introduction:
In 2000 – 2002 midlife refurbishments were carried out on several cable circuits, mainly within London. As part of these refurbishment works the old link boxes were to be removed and new above ground pillars were fitted. At this time system studies were carried out and it was found that the length of major electrical sections could be extended, therefore reducing the number of link pillars that were required, eliminating the need for extra easements to be obtained and reducing ongoing maintenance requirements. However it has been found that circuits where the length of the electrical sections has been extended are suffering from multiple failures of the SVLs fitted to the cable bonding system. These SVLs are generally installed in public places and are critical to the circuit operation. As a result of this multiple circuits have been placed on enhanced maintenance regimes. These regimes require a major maintenance to be carried on the affected circuits annually opposed to being carried out every 3 years. Long electrical sections are also of interest as several new cable circuits are proposing to be installed with long electrical sections.
Objectives:
This project will provide National Grid with:
An understanding of the steady state and transient performance of cables with long electrical sections
An awareness of the failure mechanisms and life limiting factors of cable sheath voltage limiters (SVLs)
Recommendations for the future of operation and maintenance of cables with long electrical sections.
Related Links
National Grid Innovation Page on Sep 02, 2013
http://www.nationalgrid.com/corporate/About+us/innovation
National Grid Innovation Funding Incentive and Annual Report(s) on Sep 02, 2013
http://www.nationalgrid.com/uk/Electricity/Info/IFI/