Private wire systems are localised electricity grids connected to the local distribution networks but linked to privately-owned central plant which produces electricity.
This enables them to operate a stand-alone supply in the event of the national grid failing, providing localised energy security.
The business case for private wire supply is driven by the fact that off-grid generation generally avoids network charges and statutory costs.
[1] Ofgem's "Significant Code Review" in the UK, launched in August 2017,[2] includes private wire supplies within its scope.
This article about electric power is a stub.