Yesterday we released the video (two years to day the we started BR no less!) on how the upcoming Powerlines system will work!
This is one of the many systems (see Angular Destruction) we get to focus this year now with the proper multiplayer foundation going into place and the ship systems having our undivided attention.
NOTE that before any of the new ship systems are integrated, we'll be releasing our upcoming Sandbox update that rebuilds BR's foundation from the ground-up for multiplayer.
If you've got any questions on power lines that were not answered by the video, fire away in the forums and we'll answer what we can!