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Reference Number NIA_UKPN0010
Title Vertical Transition Straight Joints Innovative Inspection
Status Completed
Energy Categories OTHER POWER and STORAGE TECHNOLOGIES(Electricity transmission and distribution) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 50%;
ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 50%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
UK Power Networks
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 September 2015
End Date 01 July 2017
Duration 22 months
Total Grant Value £899,396
Industrial Sectors Power
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , UK Power Networks (100.000%)
Web Site
Objectives The aim of the project is to successfully develop an innovative product that can monitor the health of HV cable joints and identify those at higher risk of failure for their controlled replacement, avoiding their catastrophic failure and related collateral damage which is currently a safety hazard to our staff and members of the public. The success of the project will be judged against the four objectives described below: Successful collection of PD data capture from a number of sites with HV cable joints Analysis of PD captured data to define the bandwidth at which HV cable joints are at higher risk of failure Retrieval of HV cable joint(s) where PD readings are deemed to be defective for forensic analysis in the laboratory Development of a new product ("Canary") that can be used for monitoring the health of HV cable joints and cable pits to detect those with high partial discharge for their controlled replacement
Abstract Until 1996, joints were installed inside the sub-station in a vertical position adjacent to the switchgear. UK Power Networks have approximately 4,000 sites in the London Power Networks (LPN) area that contain these Vertical Transition Straight joints (VTSJs); there are generally 2 per site. The problem is that there is no established mobile or remote method to detect and identify pre-fault or fault conditions of these VTSJs on 11kV cable joints. Hence, it is necessary to develop a device and method that is both mobile and remote to monitor the health of HV cable joints and detect failure modes at which HV cable joints, specifically VTSJs, disrupt so those at higher risk of failure can be identified for controlled planned replacements to be arranged. This would also support the management of failure occurrences and collateral damage inside the substation that poses a safety hazard to the public and members of staff. Investigation and trial of the existing mobile PD technology (the PD Hawk device was proven on a different asset group in the IFI project "Cable Pit Mitigation Strategy") will be used to detect the presence of partial discharge in VTSJs to potentially identify pre-fault or fault conditions. Partial Discharge (PD) readings on existing VTSJs will be captured through undertaking site inspections at substation sites within the LPN area of UK Power Networks using the PD Hawk device. If and when a defective joint(s) is found, the joint sample will be retrieved for forensic analysis in the laboratory at EA Technology. Following the PD data capturing exercise and laboratory analysis of joint sample(s) retrieved, a new product "Canary" will be developed which will specify a bandwidth of partial discharge at which joints are likely to fail. The Canary is planned to be a mobile device that can be fixed at site for a chosen period, therefore an enhancement to the existing handheld PD Hawk device that is used at a given time of day at the point of inspection. This will provide the ability to monitor PD readings overtime which may lead to improved detection of PD failure modes and subsequently improved identification of sites at higher risk of failure for controlled replacement.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 17/12/18