Wind turbine system, wind turbine comprising wind turbine system, and method for said wind turbine

Abstract

The invention relates to a wind turbine system for a wind turbine, comprising a control device and an energy supply unit with an energy store, which is configured to detect a normal operating mode, in which the wind turbine is connected to an electrical network, and a disconnected state, in which the energy store is connected to the electrical network, of the wind turbine, and an electrical network connection, in which the energy store is connected to the electrical network. The wind turbine is separated from the electrical network, and the control device is connected to a wind sensor for detecting a wind parameter and comprises an azimuth angle control device for setting an azimuth angle of the wind turbine as a function of the wind parameter. The energy supply unit also has a monitoring device which is supplied with energy from the energy store in the separated state and which is connected to the wind sensor or another wind sensor in the separated state, and the energy supply unit is configured to supply energy to the energy store in the separated state. In the separated state, the control device is disconnected from the energy supply or the control device is supplied with energy depending on a wind parameter detected by means of the monitoring device. The invention further relates to a wind turbine and to a method for operating a wind turbine.

Description

Technical Field

[0001] The invention relates to the field of wind power plants. Wind power plants are well known and are used to convert wind kinetic energy into electrical energy. To this end, the wind power plant comprises a rotor with a plurality of rotor blades. The wind exerts a force on the rotor blades of the wind power plant so as to set the rotor in a rotational motion. A generator is coupled to the rotor, which is driven by the rotational motion of the rotor to provide electrical energy for feeding into a power grid, for example a supply grid. Background Art

[0002] For feeding, the wind energy device is connected to the power grid accordingly, wherein when the wind energy device cannot obtain electrical energy from the wind, energy from the power grid can also be supplied to the components to maintain the reliable operation of the wind energy device. This situation exists, for example, in the case of very low wind speeds. In addition, the following situation is also known, in which the wind energy device does not generate electrical energy despite sufficient wind speed due to power reduction or power throttling preset by the power grid operator, for example. In this case, energy from the power grid is also supplied to the components of the wind energy device. For example, a continuous supply of components is required so that the rotation angle of the rotor blades around their longitudinal axis or the orientation of the rotor, i.e. the azimuth angle, can be continuously matched to the changing wind conditions by means of an azimuth drive. Therefore, when the wind direction and / or wind speed changes, the load caused by the force generated by the wind on the wind energy device can be reduced, or the load can be kept within specific limits.

[0003] In order to ensure such setting feasibility of the wind energy installation by means of a control device even in a disconnected state of the wind energy installation which is not connected to the grid, various solutions are known. In particular, in a disconnected state, which is caused, for example, by the wind energy installation not yet being connected to the grid after being set up, a generator with an internal combustion engine is often used, for example. Such a generator is installed, for example, in the area of ​​the wind energy installation and supplies the wind energy installation with energy continuously or as required for setting. It is also known to provide a battery which supplies the wind energy installation with energy as required in order to bridge a disconnected state caused, for example, by a brief grid failure.

[0004] Known solutions generally provide for feeding energy into the wind energy installation in the area of ​​the grid connection, so that the energy supply unit of the wind energy installation only needs to be provided with a changeover switch, which in a first switch position supplies the components of the wind energy installation with energy from the grid and in a second switch position supplies the components of the wind energy installation with energy from an energy storage device or a generator.

[0005] It is thus possible to provide an energy supply to a wind power installation in the disconnected state and to retrofit wind power installations which have hitherto not been energy-supplied without a grid connection.

[0006] However, the energy requirement of the wind power installation in the disconnected state results in a time-limited reliable operating duration, in particular when using energy stores. Therefore, only by using energy stores with very high capacities can the duration of the disconnected state be extended. Summary of the invention

[0007] The object of the present invention is therefore to solve the problems of the prior art. In particular, a possibility should be found to extend the time period during which reliable operation of a wind power plant can be maintained in the disconnected state. In any case, the object of the present invention is to find an alternative to the solutions known from the prior art.

[0008] The present invention therefore proposes a wind energy installation system.

[0009] Accordingly, the present invention relates to a wind power plant system for a wind power plant, the wind power plant system having a control device for controlling the wind power plant and an energy supply unit. The energy supply unit includes an energy storage device. In addition, the wind power plant system includes a grid connection for connecting to a power grid. The energy supply unit is configured to identify a normal operating mode of the wind power plant and a disconnected state of the wind power plant. In normal operating mode, the wind power plant is connected to the power grid. In the disconnected state, the wind power plant is disconnected from the power grid. Accordingly, in normal operating mode, energy can be extracted from the power grid via the grid connection. The disconnected state includes the separation of the wind power plant from the power grid, wherein this separation also includes that the energy of the wind power plant cannot be extracted from the power grid, i.e., there is still a physical connection.

[0010] Furthermore, the control device is connected to a wind sensor for detecting wind parameters. The control device comprises an azimuth angle control device for setting the azimuth angle of the wind energy device according to the wind parameters. The wind parameters include, for example, the wind speed detected by the wind sensor or an average value of the wind speed derived from the time variation curve of the wind speed, for example, a 10-minute average value. The wind speed is specified, for example, in km / h or m / s. Furthermore, the wind parameters include, for example, the wind direction, which is specified, for example, as an angle in degrees. An angle of 0° corresponds, for example, to the wind direction when the wind hits the wind energy device from the north sky direction. An angle of 90° corresponds to the wind direction when the wind hits the wind energy device from the east sky direction.

[0011] Furthermore, the energy supply unit comprises a monitoring device. The monitoring device is supplied with energy from the energy storage device in the disconnected state. The monitoring device is connected to a wind sensor connected to the control device and / or another wind sensor for detecting wind parameters, and is configured to detect wind parameters also in the disconnected state. Furthermore, the energy supply unit is configured to disconnect the control device from the energy supply in the disconnected state, or to supply the control device with energy from the energy storage device, depending on the wind parameters detected by means of the monitoring device.

[0012] Accordingly, the energy supply unit is preferably configured to supply the control device with energy from the grid in the normal operating mode. However, if the energy supply unit detects a disconnected state, in the disconnected state, although energy from the energy storage device is supplied to the monitoring device, the control device is disconnected from the energy supply. However, if necessary, the control device can also be supplied with energy from the energy storage device. For this purpose, the wind parameters are monitored with a wind sensor and a monitoring device, and the energy supply unit is used to decide, based on the wind parameters, whether the control device is disconnected from the energy supply or whether energy from the energy storage device is supplied to the control device.

[0013] Thus, even if the wind energy installation is not connected to the grid, reliable operation of the wind energy installation is ensured. According to the invention, the control device of the wind energy installation for general control tasks, in particular for obtaining a reliable state of the wind energy installation even in the disconnected state, is supplied with energy from the energy storage device. However, the supply is only carried out when necessary. If the wind energy installation does not need to be regulated in order to ensure a reliable state, the energy supply to the control device is interrupted. The monitoring tasks of the control device, for example for detecting the load situation, are then assumed by the monitoring device.

[0014] By switching off the control device, energy can be saved, so that the wind power plant can achieve a longer period of reliable state in the disconnected state compared to wind power plants known from the prior art with the same capacity of the energy storage device of the wind power plant system according to the invention. The invention is based on the recognition that a monitoring device with an isolated functional range limited to the control device requires less energy.

[0015] According to a first embodiment, the energy supply unit is configured to keep the control device without energy supply in the separated state when the wind parameter representing the wind speed is below at least one predefined threshold value or when the wind parameter representing the wind direction is within a predefined maximum wind direction range. In addition, the energy supply unit is configured to switch on the energy supply of the control device when the wind parameter representing the wind speed is above a threshold value and when the wind parameter representing the wind direction is outside a predefined maximum wind direction range.

[0016] Accordingly, the control device remains without energy supply in the separated state, i.e., remains in a state in which no energy is supplied to the control device, as long as the wind speed or wind direction of the wind moves within a predefined limit value. Preferably, the control device remains without energy supply as long as the wind speed represented by the wind parameter representing the wind speed remains below a predefined threshold value, while changes in wind direction have no effect. Therefore, even if the wind parameter representing the wind direction is outside the predefined maximum wind direction range, but the wind speed remains below the threshold value, the control device accordingly preferably remains without energy supply. Correspondingly, if only the wind speed is above the threshold value, but the wind direction is within the maximum wind direction range, the control device remains without energy supply.

[0017] The energy supply to the control device is therefore preferably switched on only when the wind parameter representing the wind speed is above a threshold value and the wind parameter representing the wind direction is outside a predefined maximum wind direction range. Thus, a change in wind direction does not automatically cause energy to be supplied to the control device as long as the wind speed remains below the threshold value or vice versa.

[0018] Here, the embodiment is based on the recognition that in the disconnected state, the wind energy device is always placed in a state in which the rotor blades are oriented so that the wind hitting the rotor head-on exerts as little force on the rotor as possible. Therefore, when the wind speed changes, it is not necessary to adjust the rotor blades around their longitudinal axis. However, if the wind direction changes, then at higher wind speeds it is necessary to track the pod, i.e. to reset the azimuth angle. For this case, energy is supplied to the control device in order to adjust the azimuth angle by means of the azimuth angle control device. It has been recognized that the azimuth angle must be adjusted only when a change in wind direction occurs at high wind speeds. Therefore, the setting process in the disconnected state and thus the energy to be consumed are further reduced.

[0019] According to another embodiment, the energy supply unit is configured to disconnect the control device, which is supplied with energy from the energy storage device, from the energy supply in the separated state when the wind parameter representing the wind direction is within a minimum wind direction range or when the wind parameter representing the wind speed is below at least one predefined threshold value or another predefined threshold value. Thus, if the wind speed drops below the predefined threshold value or another threshold value, the energy supply to the control device is interrupted. If the wind direction is within a predefined minimum wind direction range, the energy supply to the control device is also switched off.

[0020] According to another embodiment, the monitoring device is configured to adjust the maximum wind direction range and / or the minimum wind direction range according to the current azimuth orientation of the wind energy installation. Thus, according to the current azimuth orientation, the minimum wind direction range or the maximum wind direction range is determined by means of the monitoring device.

[0021] For example, the minimum wind direction range is always determined as an angle range between two angles, which correspond to the current angle range plus a value on the one hand and to the current angle range minus the value on the other hand. Similarly, a maximum wind direction range is also determined, wherein the value of the maximum wind direction range can be different from the value used to determine the minimum wind direction range. If based on a wind direction of, for example, 90°, where 0° and 360° would correspond to a wind direction from the north, the maximum wind direction range would correspond, for example, to wind directions that hit the wind energy installation at an angle between 80° and 100°. In contrast, the minimum wind direction range would, for example, include wind directions with angles of 85° to 95°.

[0022] According to another embodiment, the maximum wind direction range includes an angle range that is larger than the minimum wind direction range. The maximum wind direction range preferably corresponds to an angle range between -5° or less, preferably -8° or less, and +5° or more, preferably +8° or more, relative to the current azimuth angle. Thus, if the current azimuth angle corresponds to, for example, a 90° angle, the maximum wind direction range corresponds to, for example, a range of 85° to 95° or preferably 82° to 98°. The minimum wind direction range also corresponds to an angle range between -5° or more, corresponding to the current azimuth angle, and +5° or less, corresponding to the current azimuth angle.

[0023] Two different wind direction ranges are provided, namely a maximum direction range and a minimum wind direction range, wherein the minimum wind direction range is smaller than the maximum wind direction range, for avoiding switching back and forth between supplying energy to the control device and disconnecting the control device from the energy supply when the wind direction changes in the marginal range of the wind direction range. Therefore, preferably, in the case where the energy supply unit recognizes that the wind speed is greater than a threshold value and the wind direction is outside the maximum wind direction range, energy is supplied to the control device in a separated state in order to adjust the azimuth orientation. The control device is disconnected from the energy supply again only when the current wind direction is within the minimum wind direction range. Therefore, a slight change in wind direction does not ensure that the maximum wind direction range is exceeded, so that the control device needs to be re-energized.

[0024] According to a further embodiment, the control device is configured to change the azimuth angle of the wind power installation by means of the azimuth angle control device in the disconnected state during the energy supply by the energy supply unit.

[0025] According to another embodiment, the wind energy device system includes a DC voltage intermediate circuit. The energy supply unit is configured in a separated state to separate or connect the energy storage device from the DC voltage intermediate circuit according to wind parameters. The separation and connection are preferably performed by means of a DC voltage converter. The separation is used to disconnect the DC voltage intermediate circuit from the voltage. The connection is used to supply energy to the DC voltage intermediate circuit from the energy storage device. In addition, the energy supply unit is configured to extract energy from the DC voltage intermediate circuit in a normal operating mode for charging the energy storage device. Therefore, the DC voltage intermediate circuit is used to provide a constant voltage from the energy storage device in a manner that is independent of the charge state of the energy storage device and to charge the energy storage device. Therefore, a constant supply voltage for powering the components of the wind energy device is provided via the DC voltage intermediate circuit.

[0026] According to another embodiment, the energy supply unit is configured in normal operating mode to connect the DC voltage intermediate circuit to the grid via the rectifier circuit and the transformer. Thus, the same DC voltage intermediate circuit can be used on the one hand to supply the components with energy from the energy store and on the other hand to supply energy from the grid. Thus, it is not necessary to couple and disconnect different components to the energy store in a separate state and to couple and disconnect them to the grid in normal operating mode, so that interconnecting the components for energy supply with low complexity is possible.

[0027] According to another embodiment, the control device and a plurality of azimuth drives are connected to a DC voltage intermediate circuit for energy supply. Each azimuth drive comprises at least one inverter and at least one azimuth motor. Each inverter is configured to supply the azimuth motor with energy from the DC voltage intermediate circuit. The inverters are controlled in particular by means of an azimuth control device of the control device. Thus, by separating the energy storage device from the DC voltage intermediate circuit in dependence on the wind parameters in the separated state, it is possible to simultaneously disconnect the control device and the azimuth drive from the energy supply.

[0028] Furthermore, the invention relates to a wind power installation having a wind power installation system according to one of the above-described embodiments.

[0029] Furthermore, the invention relates to a method for operating a wind power installation having a wind power installation system according to one of the above-described embodiments.

[0030] According to a first embodiment, an energy supply unit of a wind power installation system is used to detect whether the wind power installation is in normal operating mode or in a disconnected state. In addition, wind parameters in normal operating mode are detected by means of a control device connected to a wind sensor. Based on the wind parameters, the azimuth angle of the wind power installation is set based on the wind parameters in normal operating mode by means of a control device and an azimuth angle control device of the control device.

[0031] Furthermore, a wind parameter is detected in the disconnected state of the wind energy installation by means of a monitoring device connected to the wind sensor or another wind sensor. The energy supply unit is further configured to disconnect the control device from the energy supply or to supply the control device with energy from the energy storage device in the disconnected state as a function of the wind parameter detected by means of the monitoring device. In contrast, in the disconnected state, the monitoring device is continuously supplied with energy from the energy storage device, i.e. also when the control device is disconnected from the energy supply. During control in a manner disconnected from the energy supply, i.e. when the control device is switched off, the wind parameter is only detected by the monitoring device, since the control device has no energy for operation.

[0032] According to one embodiment, the control device is kept without energy supply in the separated state when the wind parameter representing the wind speed is below at least one predefined threshold value or when the wind parameter representing the wind direction is within a predefined maximum wind direction range. The energy supply of the control device is switched on when the wind parameter representing the wind speed is above the threshold value and the wind parameter representing the wind direction is outside the predefined maximum wind direction range.

[0033] According to another embodiment, the control device supplied with energy from the energy storage device is disconnected from the energy supply by means of the energy supply unit in the disconnected state when the wind parameter representing the wind direction is within a minimum wind direction range and / or when the wind parameter representing the wind speed is below a predefined threshold value.

[0034] According to a further embodiment, the maximum wind direction range and / or the minimum wind direction range is adjusted by means of the monitoring device as a function of the current azimuth orientation of the wind power installation, wherein the maximum wind direction range preferably has a greater angular range than the minimum wind direction range. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Further embodiments are derived from the exemplary embodiments described in detail in the drawings. Here, it is shown:

[0036] Figure 1 A wind energy installation is shown,

[0037] Figure 2 An embodiment of a wind energy installation system is shown.

[0038] Figure 3 The schematic diagram shows a top view of a wind power installation, and

[0039] Figure 4 An embodiment of the method is shown. DETAILED DESCRIPTION

[0040] Figure 1 The schematic diagram of a wind power plant 100 according to the invention is shown. The wind power plant 100 has a tower 102 and a nacelle 104 on the tower 102. An aerodynamic rotor 106 is arranged on the nacelle 104, which has three rotor blades 108 and a fairing 110. The aerodynamic rotor 106 is set into rotational motion by the wind during operation of the wind power plant 100, thereby also rotating an electric rotor or a rotating part of a wind power plant generator, which is directly or indirectly coupled to the aerodynamic rotor 106. The electric wind power plant generator is arranged in the nacelle 104 and generates electrical energy. The pitch angle of the rotor blades 108 can be changed by a pitch motor at the rotor blade root of the corresponding rotor blade 108.

[0041] Figure 2A wind power installation system 10 for a wind power installation 100 according to one exemplary embodiment is shown. The wind power installation system 10 comprises a control device 12, which comprises an azimuth control device 14, in order to control a plurality of azimuth drives 16 of the wind power installation 100, in order to thereby change the azimuth angle of the wind power installation 100. For this purpose, the control device 12 is connected to a wind sensor 15.

[0042] Each of the azimuth drives 16 comprises at least one inverter 18 and an azimuth motor 20, wherein the inverter 18 is connected to a DC voltage intermediate circuit 22 in order to supply the associated azimuth motor 20 with energy from the DC voltage intermediate circuit 22. The inverter 18 is correspondingly controlled by the azimuth control device 14. The control device 12 is also connected to the DC voltage intermediate circuit 22 in order to extract energy from the DC voltage intermediate circuit 22 for operating the control device 12.

[0043] In order to provide energy in the DC voltage intermediate circuit 22, in normal operation mode, the wind energy installation system 10 is connected to the grid 24 via the grid connection 25. Therefore, energy is provided from the grid 24 with the supply voltage in the DC voltage intermediate circuit 22. For this purpose, the voltage is converted by means of a transformer 26, and the energy is fed into the DC voltage intermediate circuit 22 via a rectifier circuit 28. The energy supply unit 30 detects via a voltage measuring device 32 whether the supply voltage can be provided for the DC voltage intermediate circuit 22 via the grid 24, and the energy supply unit 30 controls the rectifier circuit 28 accordingly. In the case where no voltage is provided by the grid 24, this is detected by means of the voltage measuring device 32 and a disconnected state is identified. In the disconnected state, the energy supply unit 30 is configured to control the DC voltage converter 34 so that energy is fed into the DC voltage intermediate circuit 22 from the energy storage device 36.

[0044] The wind energy installation system 10 further comprises a monitoring device 38, which is connected to the wind sensor 15 and to a further wind sensor 40 in order to receive a wind parameter 42. The monitoring device 38 is shown here as a component of the energy supply unit 30, so that it can be decided by means of the energy supply unit 30 as a function of the wind parameter whether the DC voltage intermediate circuit 22 is supplied with energy from the energy store 36 or is disconnected from the energy supply. This is achieved via the DC voltage converter 34. The energy supply unit 30 with the monitoring device 38 is permanently connected to the energy store 36, so that the energy supply unit 30 can also detect the wind parameter in the disconnected state even if the energy supply unit 30 disconnects the DC voltage intermediate circuit 22 from the voltage or energy supply.

[0045] The energy supply unit 30 is therefore configured such that, if the wind parameter 42 is outside predefined limits, the control device 12 and the azimuth drive 16 are supplied with energy in order to adjust the azimuth angle, and, if the wind parameter 42 is within predefined limits, the control device 12 and the azimuth drive 18 are disconnected from the energy supply. For this purpose, different ranges and / or values ​​for determining the mentioned limits are stored in the energy supply unit 30 and / or the monitoring device 38. These references Figure 3 To elaborate.

[0046] Correspondingly, Figure 3 A schematic top view of a wind power installation 100 is shown. The wind power installation 100 comprises a rotor 106, which forms a rotor plane 50. Usually, the pod 104 tracks the wind direction 54 about a rotation center 52. This tracking corresponds to the setting of an azimuth angle 56. The azimuth angle 56 is rotated by approximately 90° starting from a zero position 58 pointing in the sky direction to the north, for example, so that an azimuth angle 56 of 90° results. Starting from the rotation center 52, the rotor plane 50 thus points to the east.

[0047] The wind also strikes the rotor 106 from the east, so that the wind direction 54 is also 90° with respect to the sky direction of the north.

[0048] According to the method, a maximum wind direction range 60 is now defined, which is between +8° and -8° relative to the current azimuth angle 56. Furthermore, a minimum wind direction range 62 is defined, which is determined in a range between +5° and -5° relative to the current azimuth angle 56. If the wind direction 54 now changes so that it is outside the maximum wind direction range 60, this is detected via the monitoring device 38 and / or the energy supply unit 30, and the control device 12 and the azimuth drive 16 are supplied with energy via the DC voltage intermediate circuit 22 in order to track the wind energy installation 100. Tracking is carried out until the wind direction 54 is within the minimum wind direction range 62 adjusted according to the current azimuth angle 56. Subsequently, the control device 12 and the azimuth drive 16 are disconnected from the energy supply.

[0049] Figure 4 The steps of an exemplary embodiment of the method are shown. In step 70, a voltage drop in the grid 24 is detected via the voltage measuring device 32. Thus, in step 72, the energy supply unit 30 detects a disconnected state. In step 74, it is checked whether the current wind direction 54 is within the minimum wind direction range 62, which is usually the case because in normal operating mode the wind energy installation 100 continuously tracks the wind direction 54 with respect to its azimuth angle 56.

[0050] If the current wind direction 54 is within the minimum wind direction range 62, the DC voltage intermediate circuit 22 is disconnected from the energy supply or remains without energy supply in step 76. The wind parameter 42 is then monitored in step 78 by means of the monitoring device 38. If a change in the wind parameter 42 is detected in step 80, which shows that the wind direction 54 and the wind speed are outside the predefined limits, i.e. the wind speed is above a threshold value and the wind direction 54 is outside the maximum wind direction range, then in step 82 energy is fed from the energy store 36 into the DC voltage intermediate circuit 22 by means of the DC voltage converter 34 in order to supply energy to the control device 12 and the azimuth drive 16 in step 84. The azimuth angle 56 of the wind energy installation 100 is then adjusted in step 86. If the current wind direction 54 is outside the minimum wind direction range 62 or outside the maximum wind direction range 60 and the wind speed is above a predefined threshold value, then step 86 is also executed after step 74.

[0051] If the wind parameter 42 is then again within the predefined limits, the control device 12 and the azimuth drive 16 are disconnected from the energy supply by means of the energy supply unit 30 in step 88. Step 78 is then carried out again. The method is carried out until it is determined by means of the voltage measuring device 32 that the grid voltage is present again, so that the normal operating mode is switched back and the DC voltage intermediate circuit 22 is permanently supplied with energy from the grid 24.

[0052] Reference numerals list

[0053] 10 Wind energy equipment system

[0054] 12 Control Devices

[0055] 14 Azimuth control device

[0056] 15 Wind Sensor

[0057] 16 Azimuth drive

[0058] 18 Inverter

[0059] 20 Azimuth motor

[0060] 22 DC voltage intermediate circuit

[0061] 24 Power Grid

[0062] 25 Grid connection

[0063] 26 Transformer

[0064] 28 Rectification circuit

[0065] 30 Energy supply unit

[0066] 32 Voltage measuring device

[0067] 34 DC voltage converter

[0068] 36 Energy storage device

[0069] 38 Monitoring equipment

[0070] 40 Another wind sensor

[0071] 42 Wind parameters

[0072] 50 Rotor plane

[0073] 52 Rotation Center

[0074] 54 Wind Direction

[0075] 56 Azimuth Angle

[0076] 58 Zero position

[0077] 60 Maximum wind direction range

[0078] 62 Minimum wind direction range

[0079] 70 Identify voltage loss

[0080] 72 Identify the separation state

[0081] 74 Check whether the current wind direction is within the minimum wind direction range

[0082] 76 Disconnect the DC voltage intermediate circuit from the energy supply or keep it deenergized.

[0083] 78 Monitoring wind parameters

[0084] 80 Identifying changes in wind parameters

[0085] 82 Feed Energy

[0086] 84 Supplying energy to the control unit and azimuth drive

[0087] 86 Adjust the azimuth angle

[0088] 88 Disconnect the control unit and azimuth drive from the power supply

[0089] 100 Wind energy equipment

[0090] 104 Pod

[0091] 106 Rotor

[0092] 100 Wind energy equipment

[0093] 102 Tower

[0094] 104 Pod

[0095] 106 Aerodynamic Rotor

[0096] 108 Rotor Blades

[0097] 110 Fairing

Claims

1. A wind power installation system (10) for a wind power installation (100), comprising: a control device (12) for controlling the wind power installation (100); an energy supply unit (30) with an energy storage device (36); and a grid connection (25) for connecting to a grid (24), The energy supply unit (30) is configured to identify a normal operating mode of the wind power device (100) and a disconnected state of the wind power device (100), wherein in the normal operating mode, the wind power device (100) is connected to the power grid (24), and in the disconnected state, the wind power device (100) is disconnected from the power grid (24). and wherein the control device (12) is connected to a wind sensor (15) for detecting at least one wind parameter (42) and comprises an azimuth angle control device (14) for setting an azimuth angle (56) of the wind energy device (100) according to the wind parameter (42), The energy supply unit (30) further comprises a monitoring device (38) which is supplied with energy from the energy storage device (36) in the disconnected state and is connected to the wind sensor (15) or another wind sensor (40) for detecting a wind parameter (42) in the disconnected state. Furthermore, the energy supply unit (30) is configured to disconnect the control device (12) from the energy supply or to supply the control device with energy from the energy storage device (36) in the separated state according to the wind parameter (42) detected by means of the monitoring device (38).

2. A wind energy device system (10) according to claim 1, wherein the energy supply unit (30) is configured to keep the control device (12) in the separated state without energy supply when the wind parameter (42) representing the wind speed is lower than at least one predefined threshold value or when the wind parameter (42) representing the wind direction (54) is within a predefined maximum wind direction range (60), and to turn on the energy supply when the wind parameter (42) representing the wind speed is higher than the threshold value and when the wind parameter representing the wind direction (54) is outside the predefined maximum wind direction range (60).

3. A wind energy equipment system (10) according to claim 1 or 2, wherein the energy supply unit (30) is configured to disconnect the control device (12) that supplies energy from the energy storage device (36) from the energy supply in the separated state when the wind parameter (42) representing the wind direction (54) is within the minimum wind direction range (62) and / or when the wind parameter (42) representing the wind speed is lower than the at least one predefined threshold value or another predefined threshold value.

4. A wind power device system (10) according to any one of the above claims, wherein the monitoring device (38) is configured to adjust the maximum wind direction range (60) and / or the minimum wind direction range (62) according to a current azimuth angle (56) of the wind power device (100).

5. A wind energy device system (10) according to any one of the above claims, wherein the maximum wind direction range (60) has a larger angle range than the minimum wind direction range (62), wherein the maximum wind direction range (60) preferably corresponds to the following angle range: the angle range is between -8° or less relative to the current azimuth angle (56) and 8° or more relative to the current azimuth angle (56), and the minimum wind direction range (62) corresponds to the following angle range: the angle range is between -5° or more relative to the current azimuth angle (56) and 5° or less relative to the current azimuth angle (56).

6. A wind power device system (10) according to any of the above claims, wherein the control device (12) is configured to change the azimuth angle (56) of the wind power device (100) in the separated state during the energy supply through the energy supply unit (30) by means of the azimuth control device (14) and the azimuth drive (16).

7. A wind energy device system (10) according to any one of the above claims, wherein the wind energy device system (10) has a DC voltage intermediate circuit (22), and the energy supply unit (30) is configured to separate the energy storage device (36) from the DC voltage intermediate circuit (22) in the separation state according to the wind parameter (42), preferably via a DC voltage converter (34) so ​​as to disconnect the DC voltage intermediate circuit (22) from the voltage, or to connect the energy storage device to the DC voltage intermediate circuit so as to feed energy from the energy storage device (36) into the DC voltage intermediate circuit (22).

8. A wind energy device system (10) according to any of the above claims, wherein the wind energy device system (10) is configured in the normal operating mode to connect the DC voltage intermediate circuit (22) to the power grid (24) via a rectifier circuit (28) and a transformer (26) and to extract energy from the DC voltage intermediate circuit (22) for charging the energy storage device (36).

9. A wind energy device system (10) according to any one of the above claims, wherein the control device (12) and a plurality of azimuth drives (16) are connected to the DC voltage intermediate circuit (22) for energy supply, wherein each azimuth drive (16) has at least one inverter (18) and at least one azimuth motor (20), wherein the inverter (18) of each azimuth drive (16) is configured to supply energy from the DC voltage intermediate circuit (22) to the azimuth motor (20).

10. A wind power installation (100) having a wind power installation system (10) according to any one of the preceding claims. 11 . A method for operating a wind power installation ( 100 ) having a wind power installation system ( 12 ) according to claim 1 , in particular a wind power installation according to claim 10 .

12. The method according to claim 11, wherein a control device (12) of the wind energy device (100) receives a wind parameter (42) from a wind sensor (15), and sets an azimuth angle (56) of the wind energy device (100) according to the wind parameter (42), wherein a disconnected state of the wind energy device (100) is identified with the help of an energy supply unit (30), and in the disconnected state, energy from an energy storage device (36) is supplied to a monitoring device (38) so that the wind parameter (42) is detected by a wind sensor (40) connected to the monitoring device (38), wherein in the disconnected state, energy from the energy storage device (36) is supplied to the control device (12) according to the detected wind parameter (42) or the control device is disconnected from the energy supply with the help of the energy supply unit (30).

13. A method according to claim 11 or 12, wherein when the wind parameter (42) representing the wind speed is lower than at least one predefined threshold value and / or when the wind parameter (42) representing the wind direction (54) is within a predefined maximum wind direction range (60), the control device (12) is kept without energy supply in the separated state, and when the wind parameter (42) representing the wind speed is higher than the threshold value and / or when the wind parameter (42) representing the wind direction (54) is outside the predefined maximum wind direction range (60), the energy supply of the control device (12) is turned on.

14. A method according to any one of claims 11 to 13, wherein when the wind parameter (42) representing the wind direction (54) is within a minimum wind direction range (62) and / or when the wind parameter (42) representing the wind speed is below at least one predefined threshold value, in the separated state, the control device (12) to which energy is supplied from the energy storage device (36) is disconnected from the energy supply.

15. The method according to any one of claims 11 to 14, wherein the maximum wind direction range (60) and / or the minimum wind direction range (62) is adjusted as a function of an azimuth angle (56) of the wind energy installation (100).

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