Calculation of ongoing ancillary costs

You should thoroughly reconsider your statement regarding baseload capability because it is completely wrong. A calm period at night and you are out. Baseload capability means being able to ramp energy demand up and down in certain output ranges at any time of day or night. Currently, this can only be reliably done with nuclear, coal, gas, hydro, partly pumped storage, and very limitedly with combustion power plants. But not with photovoltaics or wind energy without having previously stored the energy they generated somewhere in large quantities. There were model trials with using energy from wind turbines to operate pumped storage plants, but here too, limits were quickly reached.

And then there is the problem of bringing the electricity down south. Because there is simply much less wind there and the better solar quota only helps in summer.

For someone who supposedly works at an institute of the TUM, you have surprisingly little knowledge of storage solutions, power-to-gas, compressed air storage. And you have to actually catch that absolute calm at night in the North and Baltic Sea first. But sure. You just deal with shaft solutions and therefore only have a hammer. Every problem looks like a nail to you for which, of course, your hammer is the only solution. Known problem.

There are these things... wait... I think they're called masts. Thin things hang on them... wait... cables, exactly, they're called cables!
They transport electricity from A to B... sometimes even to C! I think it works quite well.