Abstract: A wind turbine includes a component arranged in the nacelle of the wind turbine, which component requires lubricating with a liquid lubricant. An automatic liquid lubricant changing arrangement includes a source of fresh liquid lubricant, a supply line for supplying fresh liquid lubricant from the source to the component, a waste liquid lubricant collecting unit for waste liquid lubricant, and a removal line for conveying waste liquid lubricant from the component to the waste liquid lubricant collecting unit. Moreover, a control device for such a wind turbine and a method of operating such a wind turbine are provided.

Abstract: A wind turbine including at least one component with a surface is provided. The surface is coated at least in part with a refractory layer, preferably a boron-based refractory layer. Further, a wind farm including such a wind turbine and a method are provided.

Abstract: A wind turbine with a drive train connecting a drive unit with a generator assembly is provided. The generator assembly includes a first generator with a first stator and a first rotor, the first rotor being directly connected to the drive train, and at least a second generator indirectly coupled to the drive train via a gear box. Further, a drive train assembly, a wind turbine nacelle system, a method for converting rotational energy into electrical energy, a method of building a nacelle and methods of re-equipping a wind turbine are provided.

Abstract: A wind turbine includes a component arranged in the nacelle of the wind turbine, which component requires lubricating with a liquid lubricant. An automatic liquid lubricant changing arrangement includes a source of fresh liquid lubricant, a supply line for supplying fresh liquid lubricant from the source to the component, a waste liquid lubricant collecting unit for waste liquid lubricant, and a removal line for conveying waste liquid lubricant from the component to the waste liquid lubricant collecting unit. Moreover, a control device for such a wind turbine and a method of operating such a wind turbine are provided.

Abstract: A wind turbine with a drive train connecting a drive unit with a generator assembly is provided. The generator assembly includes a first generator with a first stator and a first rotor, the first rotor being directly connected to the drive train, and at least a second generator indirectly coupled to the drive train via a gear box. Further, a drive train assembly, a wind turbine nacelle system, a method for converting rotational energy into electrical energy, a method of building a nacelle and methods of re-equipping a wind turbine are provided.

Abstract: A wind turbine including at least one component with a surface is provided. The surface is coated at least in part with a refractory layer, preferably a boron-based refractory layer. Further, a wind farm including such a wind turbine and a method are provided.

Abstract: A gear assembly is disclosed. The gear assemble includes a ring gear and at least one pinion gear. The ring gear includes a surface which is coated with an abrasion resistant coating and the surface of the at least one pinion gear has a lower hardness than the surface of the ring gear.

Abstract: A wind power plant is provided including at least one component with a surface. The surface is coated at least partially with a hard material layer, preferably a vanadium-based hard material layer. Further, a wind park and a method of improving a characteristic of a surface of a component of a wind power plant are provided.