US 2017/0373533 A1 · METHOD FOR OPERATING A WIND FARM

Abstract

A method for operating a plurality of wind energy installations configured for supplying electric power to an electrical supply system, that each have an aerodynamic rotor with rotor blades and an electrical generator and also operating equipment, is disclosed. The wind energy installations are operated while they are not connected to the electrical supply system, where at least one of the wind energy installations produces electric power and inputs the electric power into a local DC voltage system that connects the wind energy installations if the at least one of the wind energy installations currently produces more power than needed for supplying its own operating equipment. Additionally or alternatively, the operating equipment is supplied totally or in part with power from the local DC voltage system if the at least one of the wind energy installations currently produces less power than needed for supplying its operating equipment.

Claims21

Dependent claims

A method for operating a plurality of wind turbines, respectively having an aerodynamic rotor with rotor blades, an electrical generator and operating devices, for feeding electrical power into an electrical supply grid, the method comprising:

operating the plurality of wind turbines while the plurality of wind turbines are not connected to the electrical supply grid;
generating, by at least one wind turbine of the plurality of wind turbines, electrical power;
in the event, the at least one wind turbine is generating more electrical power than needed for supplying the at least one wind turbine's own operating devices, feeding the electrical power into a local DC voltage system coupled to the wind turbines;
and
in the event, the at least one wind turbine is generating less electrical power than needed for supplying the at least one wind turbine's operating devices, supplying the operating devices entirely or partially with energy from the local DC voltage system.

2 more elements

A method for operating a wind turbine including a rotor with adjustable rotor blades, the method comprising:

configuring the wind turbine for operating in light wind, with wind speeds above a cut-in wind speed and below a rated wind speed, in a part-load operating mode, in which the wind turbine generates sufficient power for operating operating devices of the wind turbine and in which the rotor blades are set with a part-load angle;
configuring the wind turbine for operating in an idling mode, in which the rotor blades are positioned in relation to wind at a starting angle that is closer to a feathered position angle than the part-load angle, and at which the rotor can start up in light wind below the cut-in wind speed;
and
continuing to operate the wind turbine in the idling mode and with the starting angle even if the wind turbine, due to prevailing wind conditions, generates less power than needed for operating the operating devices.

1 more element

Dependencies are inferred from the claim text.

Method for operating a wind farm

Life of this patent

Method for operating a wind farm

Life of this patent

Abstract

Claims21