61
Cheng Ting Hsu: Tornado type wind turbines. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, June 5, 1984: US04452562 (26 worldwide citation)

A tornado type wind turbine has a vertically disposed wind collecting tower with spaced apart inner and outer walls and a central bore. The upper end of the tower is open while the lower end of the structure is in communication with a wind intake chamber. An opening in the wind chamber is positioned ...


62
Luetze Hans Henning, Rieken Stefan, Meyer Dietmar: Wind farm and method for operating same. Gen Electric, October 13, 2004: EP1467463-A1 (26 worldwide citation)

A wind farm with at least two wind turbines (1, 2, 3, 4) connected to a power grid is provided, said wind farm further comprising a control unit (5) connected to said at least two wind turbines (1, 2, 3, 4), and a sensor unit (6) connected to said power grid and said control unit (5), wherein said s ...


63
Gregorio Rivas, Iker Garmendia, Josu Elorriaga, Jesus Mayor, Javier Perez Barbachano, David Sole, Jorge Acedo: Reactive power control for operating a wind farm. Ingeteam Energy, Sughrue Mion PLLC, May 12, 2009: US07531911 (25 worldwide citation)

A system and method of reactive power regulation in a wind farm having a plurality of wind turbines that provides optimum control of the reactive power compensation in the wind farm and is able to keep a reactive power reserve in order to support eventual grid contingencies.


64
Aloys Wobben: Method for operating a wind turbine. Seed IP Law Group PLLC, November 15, 2005: US06965174 (25 worldwide citation)

The present invention relates to a method for operating a wind turbine with an electrical generator, drivable by a rotor, for supplying electrical power to an electric grid, in particular to the loads connected thereto. The object of the present invention is to define a method for operating a wind t ...


65
Lorenzo Battisti: Anti-icing system for wind turbines. Cesari and McKenna, Patricia A Sheehan, December 29, 2009: US07637715 (25 worldwide citation)

A de-icing and anti-icing arrangement for a Wind Energy Converting System (WECS), a WECS comprising a de-icing and anti-icing arrangement and a method for preventing and eliminating ice accretion on the rotor blades of a WECS are provided. The WECS comprises a tower, a rotor having a plurality of bl ...


66
Letas Heinz Hermann, Limbeck Volker, Scheibe Klaus, Lehmann Eberhard, Wilmes Thomas, Venker Michael: Lightning protection system for wind turbines. Repower Systems, Stemmann Technik, August 31, 2005: EP1568883-A2 (25 worldwide citation)

The wind energy generator has a propeller (2) driven generator in a housing (4) that is mounted on a pillar (5). The system is protected against lightning strikes (1) by a conductor system (10,11,12) coupled to ground (7). The system uses a slip ring and brush to connect between rotary and stationar ...


67
Gaudencio A Labrador: Rein-deer kite and its control systems. July 25, 1995: US05435259 (25 worldwide citation)

What has been created is a new device that is used to take benefits from the energy of the high altitude winds for purposes of doing work and to produce usable and storable energy such as electricity, compressed air, etc., without using fuel. This device maybe in the form of an ordinary glider kite ...


68
Ralph A Morrill: Wind energy metering and recording systems. May 22, 1979: US04155252 (25 worldwide citation)

A system for detecting and metering wind energy and recording the total integrated energy or power levels over any desired period of time. The system emphasizes simplicity of design to achieve: a transducer sensitive to the presence of winds that embodies a means of generating a voltage which is a f ...


69
Aloys Wobben: Wind energy system with adjustment of the sound level. February 10, 2004: US06688841 (25 worldwide citation)

In a method for enabling a wind energy system to stay within noise immission limits, the rotational speed of the turbine rotor is reduced as soon as set values are reached in terms of sound level, wind speed, direction of the wind or time of the day. The second part of the inventive method consists ...


70
Shashikanth Suryanarayanan, Aaron Avagliano, Corneliu Barbu: Vibration damping method for variable speed wind turbines. General Electric Company, Fletcher Yoder, September 9, 2008: US07423352 (24 worldwide citation)

A vibration damping technique for a wind turbine system is described. The wind turbine system includes a vibration damper, which provides a variable signal to control torque produced by a generator of the wind turbine system. The variable signal is based on generator speed and has a first local peak ...