I had never heard of transmission lines being used for such a purpose before.
https://www.pacificorp.com/transmission/transmission-projects/energy-gateway/gateway-west.html#:~:text=The%20Gateway%20West%20project%20is,of%20two%20major%20line%20segments.
This one is for the power from several wind farms in Wyoming and Idaho now. They have also enhanced transmission lines already in use, upgraded. Many small substations are also built near the wind farms.
