Offwind capacity_factor too high

[lindnemi]

In the latest 3H run (Elec scenario) we get the following trajectory for the CF:

offwind-dc	0.34726276283057	0.507773415011066	0.518321418111682	0.518621713244829	0.511528488497239	0.511420904408977

That's still on the high side. I wonder why we see the jump between 2020 and 2025.

Relatedly, there is still PyPSA/pypsa-de#15. It has been mostly adressed by #171 but the scaling for the wake effects remains active and leads to an underestimation of the required grid capacity.

So:

• High Priority: Find out why capacity factors are high in 2025-2045
• Low Priority: Fix capacity_factor too high for offwind pypsa-de#15 to get correct maximum power output

[lindnemi]

Tom said we can live with being on the high side of CFs with 0.51. The jump from 2020 to 2025 is still strange, but probably a minor issue

[lindnemi]

Closing as duplicate of PyPSA/pypsa-de#15