INITIAL work is underway to establish an electrical link between Anglesey and south east Wales.
A National Grid spokesperson confirmed that consultation work had begun on a proposed cable link between Wylfa and Pembroke.
"We are still very much in the early planning and research stage to establish what will be required."
The cable would be used top cope with demand from the Wylfa B nuclear power station, or other forms of energy generation, including wind turbines.
The spokesperson added: "We have to look at technical issues, environmental issues and the effect of work on the local community."
The National Grid expect work to be completed by 2017.
Ofgen recently gave the National Grid £1 million for a feasibility study on reinforcing existing systems across Wales.
The Snowdonia Society said earlier this month that cable should be laid under the sea.
A spokesperson said: "Currently there are over 4,375 miles of overhead electricity line in the UK supported by 22,000 pylons, some up to 170 feet high.
"This is despite the fact that Ofgem and the electricity companies have a legal duty to have ‘regard’ to our most important areas and landscapes in their work."
Anglesey MP Albert Owen said that he had discussed options, including under sea cabling, with the National Grid and project stakeholders.
He added: “Anglesey’s strategic location offers great potential to be a hub which fits in with the Energy Island concept.
“I welcome the positive move by National Grid to examine all options”
The consultation process on the plan runs until March.
For more information, visit www.nationalgrid.com.