Abstract: A method for controlling a wind turbine system is provided. The wind turbine system includes a power conversion assembly for converting electrical power into a converted electrical power. The method includes monitoring a power extraction parameter, wherein the power extraction parameter is indicative of the power extracted by the wind turbine system from the wind prior to being converted in the power conversion assembly. The method further includes controlling one or more operational variables of the wind turbine system in response to monitoring the power extraction parameter.

Abstract: A method for controlling a wind turbine system is provided. The wind turbine system includes a power conversion assembly for converting electrical power into a converted electrical power. The method includes monitoring a power extraction parameter, wherein the power extraction parameter is indicative of the power extracted by the wind turbine system from the wind prior to being converted in the power conversion assembly. The method further includes controlling one or more operational variables of the wind turbine system in response to monitoring the power extraction parameter.

Abstract: A power supply device adapted for supplying electrical power to a load comprises a first electrical generator adapted for providing a first output current having a first phase angle; at least a second electrical generator adapted for providing a second output current having a second phase angle independent of the first phase angle; and a combination unit adapted for combining the first output current and the second output current to a combination current having reduced harmonics compared to the first and second output currents.

Abstract: According to the present disclosure, a cable drip loop securement system that during operation of a wind turbine, including a nacelle supported by a tower prevents knurl formations beyond a specified area of at least one cable that is routed from the nacelle into the tower is provided. The cable drip loop securement system includes a displaceable cable drip loop securement device that accommodates part of the at least one cable and a positioning element for connecting the cable loop securement device inside of the tower. The at least one cable can turn and eventually form knurls only above the cable loop securement device.

Abstract: According to the present disclosure, a cable drip loop securement system that during operation of a wind turbine, including a nacelle supported by a tower prevents knurl formations beyond a specified area of at least one cable that is routed from the nacelle into the tower is provided. The cable drip loop securement system includes a displaceable cable drip loop securement device that accommodates part of the at least one cable and a positioning element for connecting the cable loop securement device inside of the tower. The at least one cable can turn and eventually form knurls only above the cable loop securement device.

Abstract: A power supply device adapted for supplying electrical power to a load comprises a first electrical generator adapted for providing a first output current having a first phase angle; at least a second electrical generator adapted for providing a second output current having a second phase angle independent of the first phase angle; and a combination unit adapted for combining the first output current and the second output current to a combination current having reduced harmonics compared to the first and second output currents.

Abstract: A fault detection device adapted for detecting an electrical fault at a medium voltage switchgear having at least one power module is provided. The fault detection device includes at least one input current sensor adapted for measuring at least one input current of the at least one power module of the medium voltage switchgear and at least one output current sensor adapted for measuring at least one output current of the at least one power module of the medium voltage switchgear. A comparator is provided which is adapted for comparing the at least one output current with the at least one input current. A control unit is adapted for determining an electrical fault at the at least one power module of the medium voltage switchgear on the basis of the comparison.

Abstract: An integrated fault and personnel protection system and method for a multi-thread converter in a wind turbine power system is provided. The structure and method provide for system optimization, as well as, arc flash protection. Fault sensing with means of removing power applied to the converter minimizes the energy available to produce an arc flash event. Sensing and disconnects devices for the protections are provided close to the source of energy to protect more of the system. Converter controls detect, identify and isolate faults selecting the best combinations of the novel specific fault isolation devices. Components are distributed into separate physical to enhance protection.

Abstract: A method of providing power from a wind generator includes sending a request to supply power to an operator of a power distribution network; receiving an authorization to supply power from the power distribution network operator; and connecting the wind generator to the power distribution network in response to the authorization to supply power.

Abstract: An integrated fault and personnel protection system and method for a multi-thread converter in a wind turbine power system is provided. The structure and method provide for system optimization, as well as, arc flash protection. Fault sensing with means of removing power applied to the converter minimizes the energy available to produce an arc flash event. Sensing and disconnects devices for the protections are provided close to the source of energy to protect more of the system. Converter controls detect, identify and isolate faults selecting the best combinations of the novel specific fault isolation devices. Components are distributed into separate physical to enhance protection.

Abstract: The method for operating a frequency converter (26) of a generator (14) in particular of a wind energy turbine (10), in the event of a substantial grid voltage drop, wherein the frequency converter (26) comprises a generator-side power converter (32), to be connected to the generator (14), a grid-side power converter (28) to be connected to the voltage grid (18), and a DC link circuit (30) for connecting the generator-side power converter (32) to the grid-side power converter (28), comprises the step of generating the amount of reactive current to be supplied to the grid (18) by controlling the frequency converter (26).

Abstract: A wind turbine includes an asynchronous generator having a rotor and a stator, means for determining an actual torque-speed curve of the generator, means for determining an actual grid frequency, and means for determining a shifted torque-speed curve in response to the determined actual grid frequency if the determined actual grid frequency is higher than a predetermined upper frequency limit or lower than a predetermined lower frequency limit. The means for determining a shifted torque-speed curve is further adapted to determine the shifted torque-speed curve such that an increase in the rotor voltage of said generator rotor is counteracted when shifting the actual torque-speed curve to the shifted torque-speed curve. The wind turbine further includes means for shifting the actual torque-speed curve of the generator to the shifted torque-speed curve.

Abstract: A wind turbine includes an asynchronous generator having a rotor and a stator, means for determining an actual torque-speed curve of the generator, means for determining an actual grid frequency, and means for determining a shifted torque-speed curve in response to the determined actual grid frequency if the determined actual grid frequency is higher than a predetermined upper frequency limit or lower than a predetermined lower frequency limit. The means for determining a shifted torque-speed curve is further adapted to determine the shifted torque-speed curve such that an increase in the rotor voltage of said generator rotor is counteracted when shifting the actual torque-speed curve to the shifted torque-speed curve. The wind turbine further includes means for shifting the actual torque-speed curve of the generator to the shifted torque-speed curve.

Abstract: A wind turbine includes an asynchronous generator having a rotor and a stator, means for determining an actual torque-speed curve of the generator, means for determining an actual grid frequency, and means for determining a shifted torque-speed curve in response to the determined actual grid frequency if the determined actual grid frequency is higher than a predetermined upper frequency limit or lower than a predetermined lower frequency limit. The means for determining a shifted torque-speed curve is further adapted to determine the shifted torque-speed curve such that an increase in the rotor voltage of said generator rotor is counteracted when shifting the actual torque-speed curve to the shifted torque-speed curve. The wind turbine further includes means for shifting the actual torque-speed curve of the generator to the shifted torque-speed curve.

Abstract: The method for operating a frequency converter (26) of a generator (14) in particular of a wind energy turbine (10), in the event of a substantial grid voltage drop, wherein the frequency converter (26) comprises a generator-side power converter (32), to be connected to the generator (14), a grid-side power converter (28) to be connected to the voltage grid (18), and a DC link circuit (30) for connecting the generator-side power converter (32) to the grid-side power converter (28), comprises the step of generating the amount of reactive current to be supplied to the grid (18) by controlling the frequency converter (26).

Abstract: A wind turbine includes an asynchronous generator having a rotor and a stator, means for determining an actual torque-speed curve of the generator, means for determining an actual grid frequency, and means for determining a shifted torque-speed curve in response to the determined actual grid frequency if the determined actual grid frequency is higher than a predetermined upper frequency limit or lower than a predetermined lower frequency limit. The means for determining a shifted torque-speed curve is further adapted to determine the shifted torque-speed curve such that an increase in the rotor voltage of said generator rotor is counteracted when shifting the actual torque-speed curve to the shifted torque-speed curve. The wind turbine further includes means for shifting the actual torque-speed curve of the generator to the shifted torque-speed curve.