General Electric Company

Andreas Buecker

Henning Luetze

Robert William Delmerico

Till Hoffmann

Werner Gerhard Barton

Wilhelm Janssen

Christian Schram

Ralf Hagedorn

A wind turbine generator includes at least one rotating member, at least one stationary member, and a clearance gap control system. The stationary member is positioned such that a clearance gap is defined between a portion of the rotating member and a portion of the stationary member. The clearance gap is configured to facilitate transmitting a controllable magnetic flux therethrough. The control system includes at least one clearance gap measurement assembly, at least one power converter, and at least one controller. The controller is coupled in electronic data communication with the assembly and the converter and is configured to modulate a dimension of the gap by modulating the flux.

Method and apparatus for controlling rotary machines

The method for operating a frequency converter () of a generator () in particular of a wind energy turbine (), in the event of a substantial grid voltage drop, wherein the frequency converter () comprises a generator-side power converter (), to be connected to the generator (), a grid-side power converter () to be connected to the voltage grid (), and a DC link circuit () for connecting the generator-side power converter () to the grid-side power converter (), comprises the step of generating the amount of reactive current to be supplied to the grid () by controlling the frequency converter ().

Method for operating a frequency converter of a generator and wind energy turbine having a generator operated according to the method

A wind turbine. The wind turbine includes a blade pitch control system to vary a pitch of one or more blades and a turbine controller coupled with the blade pitch control system. A first power source is coupled with the turbine controller and with the blade pitch control system to provide power during a first mode of operation. Uninterruptible power supplies coupled to the turbine controller and with the blade pitch control system to provide power during a second mode of operation. The turbine controller detects a transition from the first mode of operation to the second mode of operation and causes the blade pitch control system to vary the pitch of the one or more blades in response to the transition.

Low voltage ride through for wind turbine generators

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Hasbergen, Germany

Andreas Buecker