Energy regulator Ofgem signalled it was likely to approve up to £7.6bn of infrastructure investment to connect new Scottish wind farms and other renewable power generators to the UK grid.
Ofgem said on Monday it had fast-tracked proposals for infrastructure spending by energy companies ScottishPower and SSE (Frankfurt: A0RFBG - news) and expected to make a final decision in April, following a consultation.
The investment will be paid for through energy bills and is likely to add 35p to a typical household bill each year from 2013 to 2021.
Ofgem said the proposals would "deliver essential upgrades to Scotland's transmission network at the lowest cost to consumers".
The proposed spending would "replace ageing infrastructure" and also "greatly assist connections to renewable generators", Ofgem said.
It estimated that more than 1,500 jobs would be created as a result of the investment.