Ofgem will be consulting on proposals to approve three new electricity interconnectors.
These could be built by 2020 and provide around 3.4GW of electricity capacity.
Two of the interconnectors (FAB Link and IFA2) would connect Britain’s electricity system with France and one (Viking Link) with Denmark.
More electricity interconnection could lower bills for UK consumers by creating access to cheaper generation and further boost Britain’s energy supply.
The three interconnectors are estimated to provide around £8bn of benefits to British consumers over 25 years.
Ofgem is consulting on not progressing the application for an interconnector between the UK and Ireland (Greenlink), as proposals did not demonstrate enough value.
Senior partner for electricity transmission Martin Crouch said: “Ofgem is helping to deliver greater interconnection. These three interconnectors would further boost Britain’s energy security and reduce pressure on bills. To date, under our cap and floor regime, we are looking at adding around 5GW to Britain’s energy supply.”