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Reference Number NIA_ENWL014
Title Optimising Oil Regeneration for Transformers
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 (Chemistry) 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
Electricity North West Limited
Award Type Network Innovation Allowance
Funding Source ENA Smarter Networks
Start Date 01 February 2016
End Date 01 February 2022
Duration 72 months
Total Grant Value £1,500,000
Industrial Sectors Power
Region North West
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , Electricity North West Limited (100.000%)
Web Site
Objectives This project is split into three distinct phases: Phase 1 Research into and design / sourcing of an oil regeneration unit to carry out the oil regeneration at the 13 sites This phase to be completed by September 2016Phase 2 implement Oil regeneration at 13 midlife transformer sites and install condition monitoring equipment This phase to be completed by August 2017Phase 3 is the data analysis and optimisation of the oil regeneration practice This phase to be completed by February 2022. Specification and sourcing of oil regeneration unit capable of delivering the required oil quality in a controlled manner. Complete oil regeneration and condition monitoring equipment at 13 transformer sites at midlife Data acquisition, analysis and validation to identify the optimum point of oil regeneration in a transformer life cycle
Abstract As part of operating an efficient network Distribution Network Operators need to maximise the use of existing assets. This forms a key part of Electricity North West’s Innovation strategy for RIIO ED1. Electricity North West has proposed that approximately 50% of the 132kV and 33kV transformers due for renewal in the RIIO-ED1 period will now be refurbished and their oil regenerated to reduce their current Probability of Failure and extend asset life. This approach aims to maximise the life span of the transformers past their original design life thus deferring their replacement and also avoiding de-rating based on age. There is a need for further research and development to explore the maximum life of a transformer and understand the optimum point that oil regeneration can be applied in the life cycle of the transformer to take full advantage of the technique and maximise the life of the transformer. An optimal lifetime window for conducting oil regeneration exists according to theoretical analysis but the extent of this window could vary with ageing characteristics of the insulation, operational conditions of the transformer etc The project will build upon earlier First Tier research into oil regeneration towards the end of transformer life by further exploring oil regeneration in transformers at the various mid points of their nominal life to determine whether deploying the technique earlier will extend the transformer’s operable life further. The project will carry out field trials to identify the optimum point at which oil regeneration can be used in the life cycle of a transformer. To ensure a representative sample of the transformer population is analysed, a varying number of transformers with different manufacturing periods, designs and operating environments will be selected at near identical twin transformer sites. The oil will be regenerated on one of the twin transformers and both transformers shall be left to naturally age and be monitored over the projects duration to investigate the new expected lifespan of the midlife oil regenerated transformer compared to the untouched twin transformer. The results will inform the optimum intervention strategy which can then be utilised in future asset investment plans.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 17/09/18