The invention relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF...

The arrangement has at least one first energy generator using a regenerative energy source, preferably a wind power system (10) with a generator, and a second generator (32) for coupling to an internal combustion engine (30). The revolution rate and blade ...

A radio base station for mobile cellular telephony comprising: - a radio transceiver system; - plants for generating electric energy from solar energy and wind energy; - a battery set comprising a plurality of cells, that cooperates with said plants for st...