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AssigneeREpower Systems AG
InventorsJens Fortmann, Heinz-Hermann Letas
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A wind turbine with a rotor and a generator driven by, the rotor generates electrical power and delivers it to a power system. A control unit controlling the operation of the plant includes a reactive-power control module. The control unit includes also a determining device for a safe minimum active power. Furthermore, and a limiting device for the reactive-power control module, wherein the reactive power is limited to such a measure that the safe minimum active power is still available, taking into consideration the available power. As a result, the total current generated, apart from the active current required for the safe operation of the plant, can be fed into the power system as reactive current as backup in the case of a voltage drop.
A wind turbine with a rotor, a generator driven by it, which generates electrical power and delivers it to a power system, and a control unit which controls the operation of the wind turbine and has a reactive-power control module, wherein the control unit has a determining device for a safe minimum active power and a limiting device is provided which is connected to the determining device and to the reactive-power control module and interacts in such a manner that, at the most, as much reactive power is generated that the safe minimum active power is still available.
A method for controlling the operation of a wind turbine on a power system with a generator, wherein reactive power or reactive current, respectively, is fed into the power system in dependence on a voltage drop in the power system, including determining of a safe minimum active power required for safe continued operation and limiting the reactive power to such a value that at least the safe minimum active power is still generated.
Dependencies are inferred from the claim text.