Resources Contact Us Home
Operating method for a wind turbine with a supersynchronous cascade

Image Number 4 for United States Patent #7291937.

The invention relates to a wind energy system having a rotor that can be driven by the wind, preferably having one or more rotor blades that can be adjusted in angle, a generator directly or indirectly connected with the rotor, to generate electric energy, which is configured as an asynchronous generator having a super-synchronous converter cascade in the rotor circuit, for slip-variable generator operation, so that power output of the generator is possible at variable speeds of rotation of the rotor, and an operation guide system that is configured to regulate the speed of rotation of the rotor, within a predetermined wind speed range. To improve the energy yield, it is provided that the super-synchronous rectifier cascade is configured in the rotor circuit for feeding the slip power into the network. For this purpose, the super-synchronous converter cascade has a DC voltage intermediate circuit having a high-set element. These are configured to switch, as IGBT switches, with a 180 degree phase shift relative to the rotor voltage.Furthermore, the invention relates to a method for regulating the power output of the wind energy system, in that the slip is regulated, whereby the slip power is fed into the network.

  Recently Added Patents
Lighting elements
Sparse data compression
Synergistic preparations based on mixtures of glycerol ether with aromatic alcohol for controlling mycobacteria
Optimized delivery of web application code
Precision geolocation of moving or fixed transmitters using multiple observers
All-angle light emitting element having high heat dissipating efficiency
Method and apparatus for storing email messages
  Randomly Featured Patents
Method for reducing the latency during the transmission of information in a GPRS network
Ski braking device
Semiconductor device and method for fabricating the same
System for controlling the transmission ratio in an infinitely variable transmission
Method for texturing high temperature superconductors
Homologated protector modules for telephone connector blocks
Cellular phone
Light-transmitting electric conductor, method of manufacturing the same, destaticizing sheet, and electronic device
Cursor control--data entry device