The developer reduced the size of the wind farm after concerns were raised about the visual impact of the development from the coast.
The 1.2GW scheme could comprise up to 240 turbines, depending on the size of the turbines, the company said in a statement.
PINS has until 12 July to decide whether to accept the application.
Craig Harwood, project manager for Atlantic Array at RWE Npower, said that it had carried out ecological surveys both onshore and offshore.
"We have also carried out numerous consultation exercises and maintained ongoing dialogue with the local communities to listen to their feedback, all of which has fed into our final designs," he said.