Winds at higher altitudes become steadier, more persistent, and of higher velocity.  Energy can be captured from the wind by kites, kytoons, tethered gliders, tethered sailplanes, aerostats (spherical as well as shaped kytoons), bladed turbines, airfoils, airfoil matrices, balloons, parachutes, drogues, variable drogues, spiral airfoils, Darrieus turbines, Magnus-effect VAWT blimps, multiple-rotor complexes,etc. 

The mechanical energy may be converted to electricity. 

This project is a scale model of the original and produces much lower electricity than its original