Nordex Energy Gmbh

Nordex Energy Se & Co. Kg

Woodward Kempen Gmbh

Ingenieurbuero Hoffmann Gmbh

Ingenieurbüro Hoffmann Gmbh

Nils Hoffmann

Christian Wessels

Nils-Hendric Schall

Andreas Genius

This disclosure is directed to a method for operating a wind turbine which includes a speed-variable drive system. The system includes an electrical machine and a pulsewidth modulation-controlled converter. The speed-variable drive system is connected to an electrical grid. In the event of a transient grid fault, a frequency of the pulsewidth modulation is determined in response to a current in an electrical circuit connected to the converter.

Method for operating a wind turbine and wind turbine

A method for operating a wind turbine configured to supply electrical power to an electrical power supply network via a converter comprises measuring a phase angle and measuring a voltage of the electrical power supply network. A value of at least one parameter for a phase locked loop is determined depending on the measured voltage. The phase locked loop is used to determine a corrected phase angle depending on the measured phase angle and the voltage of the electrical power supply network. The corrected phase angle is input into the converter.

Method for operating a wind turbine

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Halle/Saale, Germany

Nils Hoffmann