Space-based solar power is not a good method of transferring power, besides the debris issues that schiffern mentioned, it's incredibly inefficient.
Where on Earth do we beam power long distances in any other application? If it was a good idea we would be doing it instead of running power lines through complex terrain like over mountains.
The normal case of efficiency in power beaming is an efficiency of only around 40% (if that). At that point any gains you get from putting your solar panels in space are immediately lost in the transmission to the ground. At which point you've wasted a ton of money putting solar panels in space for no gain in energy as opposed to building them on the ground.
As far as I'm aware, any attempt at space-based power is some segment of scientists misleading politicians for funding grants. It doesn't make any technical sense.