Rwe Piller Gmbh

Reinhard Engelhardt

Norbert Ueffing

Hilmar Darrelmann

Uwe Schrader-Hausmann

Armin Klauenberg

Stephan Leschke

Bernd Rosebrock

Detlev Seidel

To the end of providing a constant AC voltage to a variable load () which is arranged remote of a voltage source (), a voltage drop over an electrical supply line () which connects the load to the voltage source () is compensated for by a compensation AC voltage which, if added to the constant AC voltage, results into the output AC voltage Uof the voltage source () and the value of which is varied depending on the absolute value of the alternating current (I) conducted to the load () and on the phase angle phi between the output AC voltage Uof the voltage source () and the alternating current (I).

Method of providing a constant AC voltage to a remote variable load

A wind power station comprises a wind rotor; a transmission mechanically coupled to the wind rotor; an asynchronous generator having a generator rotor mechanically coupled to the transmission, and a generator stator electrically coupled to a power grid; and a protection unit protecting the generator and the transmission against accidental breakdowns of an alternating voltage provided by the power grid. The Protection unit includes at least one choke electrically arranged between the power grid and the generator stator, and a synchronous electrical machine electrically coupled to the choke.

Protection for wind power station

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Duderstadt, Germany

Reinhard Engelhardt