Apr 2013
Electricity Distribution
NaREC LV AVC feasibility Study
Apr 2013
Northern Powergrid
Chris Goodhand, Innovation Manager (01977 605641)
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Innovation Funding Incentive
LV & 11kV Networks
A feasibility study into novel on-load tap-changers for distribution transformers.
To assess likely technologies to provide on-load tap-changers for distribution (20kV, 11 kV or 6.6 kV to 400V) transformers, to inform future research work. Issues to be considered include:

  • Safety case

  • Ease of accommodation within standard buildings

  • Ease of retro-fit to existing units

  • Reliability

  • Energy loss in the unit and on the wider system

  • Reduced automatic tapping range (i.e. are there benefits in switching over something other than the ±5% range in 2.5% steps of conventional off-load tap-changers, either using larger steps or fewer of them)

  • Installation/maintenance cost

  • The potential impact of HD 472 (voltage harmonisation)

  • Control philosophies and implementation.