Gib Bogle wrote:

Faster than the wind, downwind? I don't think so. As the relative
velocity goes to zero, so does the extractable power. With a big, high
kite you could go faster than the wind at ground (or water) level.

Google have been sponsoring development of one effort

http://www.fasterthanthewind.org/

or search for other DWFTTW projects, less useful if you want to go in a
different direction to the wind ...