Scottish Power has submitted proposals for a £3 billion investment to energy industry regulator Ofgem.
The plans form the basis to help the company meet its aims to increase the sustainability of its energy production.
With Scotland aiming to satisfy its entire electricity demand from renewable sources by 2020, the move is considered to be an important step to making this a reality.
First minister Alex Salmond has said he “warmly welcomed” the initiative, hailed as providing hundreds of new job opportunities and assisting the move to a low carbon future.
If accepted, the plan will cover a 10 year period and result in major upgrades of the Scottish Power distribution network.
As part of this, approximately 5GW of renewable energy will be produced.