There are power cables between RG Nordic and RG Continental Europe/RG Baltic/RG GB but to my knowledge they are all via high voltage DC - so not AC phase synced.
IMO Sweden and Norway need to separate domestic and export electricity prices so that they can come back to having cheap energy as a genuine advantage for its industry.
I think we're getting a bit off-topic here, but in a nutshell: The current government of Sweden wants to build new nuclear power plants to scale up the power supply for the future.
We (Norway) do have cables connecting us to UK and Europe. They've been a hot topic the last year with the high energy prices. We're making bank on selling our hydro power when gas got scarce. But that skyrocketed our own prices.
It's a difficult topic. It's probably a net win for Norway, as we can produce when price is high, and stop our hydro and import when prices are low. The problem is just that the benefit ends up making the government and the electric producers (again owned by government orgs mostly) rich, but us people have to pay more for our own energy use. So using that extra money earned to help the people is needed.
I would assume those cables aren't frequency synchronized however, they are either a HVDC cable or have DC interconnect somewhere so that the grids aren't frequency synced.
(Here's the complete picture regarding the grid:
https://en.wikipedia.org/wiki/Synchronous_grid_of_Continenta...)
There are power cables between RG Nordic and RG Continental Europe/RG Baltic/RG GB but to my knowledge they are all via high voltage DC - so not AC phase synced.