General Electric Company

Stn Atlas Elektronik Gmbh

Dietmar Meyer

Stefan Rieken

Hans Henning Lütze

Helmut Grobecker

Willi Hornfeld

Hans Henning Luetze

A wind farm with at least two wind turbines () connected to a power grid is provided, said wind farm further comprising a control unit () connected to said at least two wind turbines (), and a sensor unit () connected to said power grid and said control unit (), wherein said sensor unit () is adapted to measure the grid frequency of said power grid and to transmit said measured grid frequency to said control unit (), and wherein said control unit () is adapted to control the output of real power of said wind farm according to said measured grid frequency. Furthermore, a method for operating a wind farm is proposed, said method comprising the steps of measuring the grid frequency with a sensor unit, transmitting said measured grid frequency to a centralized control unit, determining whether the measured grid frequency lies outside a predetermined range, and, if the measured grid frequency lies outside said predetermined range, selecting at least one out of the at least two wind turbines comprised in said wind farm by said centralized control unit and regulating the power output of said selected at least one wind turbine.

Wind farm and method for operating same

An apparatus for detecting leakages in structural members (8) is disclosed. The apparatus includes a device (2) for conveying gas through the structural member (8) to be investigated, a camera (14) having a narrow band filter characteristic matched to the spectral absorption of the gas and a device (16, 18) connected to the camera (14) for processing and displaying the recorded image of the structural member (8) to be investigated.

Apparatus for detecting leakages in structural members

Growing community of inventors

Bremen, Germany

Dietmar Meyer