When it comes to the wind industry and the electricity grid, so far it's not really a problem because wind production is way too small in comparison to hydro power in Sweden. So it's not a problem to balance.
There is electricity quality as well, so there is a lot of research in developing smart electricity grids. This is basically done because we want to be able to get more wind power into the system because the wind power is much more difficult to regulate due to the quality of the electricity. The smart electricity grid is one of the reasons. So it's new technology, yes.
The second question I didn't get, actually.