Patent ID: 7298055
Filing Date: 2007-11-20
Classification: F03D,H02J,Y02E

Abstract:
1. A wind turbine for connection to a power grid, the wind turbine comprising: a rotatable shaft; blades attached to said rotatable shaft; a nacelle; a generator connected to said rotatable shaft and located inside said nacelle; a high voltage transformer which is located inside said nacelle and is connected to said generator and to said power grid; an enclosure located below said nacelle; and a low voltage power supply disposed n said enclosure and connected to said nacelle to provide low voltage power to said nacelle, said low voltage power supply comprising a low voltage transformer connected both to said high voltage transformer and to said power grid, a first fault protection element connected between said high voltage transformer and said low voltage transformer, a first current interrupting element connected between said first fault protection element and said high voltage transformer, and a second fault protection element connected between the power grid and the first fault protection element.