FI2753826T4

FI2753826T4 - Method and system for deicing a wind turbine

Info

Publication number: FI2753826T4
Application number: FIEP12758751.7T
Authority: FI
Inventors: Karsten Brandt
Original assignee: Siemens Gamesa Renewable Energy Service Gmbh
Priority date: 2011-09-07
Filing date: 2012-08-16
Publication date: 2024-06-18
Also published as: WO2013034244A1; DE102011082249A1; EP2753826B2; EP2753826B1; DK2753826T3; ES2547210T3; EP2753826A1; DK2753826T4

Description

METHOD AND SYSTEM FOR DEICING A WIND TURBINE

Description

The invention relates to a method for de-icing a wind energy installation with a de- icing control device, by means of which a de-icing process may be carried out, in which ice adhering to the wind energy installation is at least partially released and falls into a danger region below the wind energy installation. The invention also relates to a de-icing system for a wind energy installation comprising a wind energy installation with a de-icing control device, by means of which a de-icing process may be carried out, in which ice adhering to the wind energy installation is at least partially released and falls into a danger region below the wind energy installation, wherein the de-icing system comprises an operating device for initiating and / or interrupting the de-icing process.

At locations with extreme weather conditions and also at many other locations in winter, icing of a wind energy installation, in particular the rotor blades of a wind energy installation, represents an obstacle to the efficient and safe operation of the wind energy installation. Modern wind energy installations are therefore usually designed for de-icing or are equipped with special de-icing devices.

For example, an operating method is known in which the wind energy installation is set into controlled oscillations by means of actuators for the tower pulpit, the rotor or the blade angle of the rotor blades, so that adhering ice flakes off and falls to the ground.

Furthermore, it is known to heat the surface of the wind energy installation, in particular the rotor blades, so that adhering ice is melted and slides off the wind energy installation.

WO 2010/142600 A1 discloses a method for de-icing a wind energy installation with a de-icing control device, by means of which a de-icing process started with an operating device can be carried out, in which ice adhering to the wind energy installation is at least partially released and falls into a danger region below the wind energy installation when a criterion indicating ice formation on the rotor blades is met.

What the known de-icing processes have in common is that the ice falls to the ground uncontrollably and represents a source of danger, for example for people, animals and objects in the vicinity of the wind energy installation.

The invention is based on the object of increasing safety during de-icing of a wind energy installation and in particular of reducing the risk to people, animals and objects in the vicinity of the wind energy installation due to falling ice.

This object is achieved by a method having the features of claim 1.

According to the invention, the danger region is monitored before and during the de-icing process. As soon as a veto situation exists or is observed, for example because a person, an animal and / or an object to be protected from falling ice is situated in the danger region, the de-icing process is interrupted, in particular by an operator, by means of the operating device, or is not initiated at all. According to the invention, safety during de-icing is thus increased in particular by the fact that the de-icing process is only carried out or continued when there is no danger or no danger is observed from falling ice.

It also covers the case in which a veto situation is imminent, for example if a person, an animal or an object to be protected is still outside the danger region, but is on the way into the danger region. For this purpose, the surroundings of the danger region are preferably also monitored or the monitored danger region includes the surroundings of the region in which falling ice is to be expected.

Within the scope of the invention, a corresponding de-icing control device can be part of an already existing operational control device of the wind energy installation or can be constructed separately from the operational control device. In particular, a wind energy installation can be retrofitted with a corresponding de-icing control device.

In order to protect the operator, an operating device for initiating and / or interrupting the de-icing process is provided according to the invention, which operating device allows the operator to remain outside the region at risk from falling ice or the danger region during the de-icing process, i.e., while ice can fall into the danger region.

The invention thus minimizes the risk to people, animals and / or objects to be protected from falling ice during de-icing and accordingly improves safety during de-icing for both the operator and third parties.

According to a variant of the method according to the invention, it is provided that the monitoring of the danger region and / or the starting of the de-icing process is effected by at least one operator in sighting distance of the danger region. This represents a particularly simple procedure to implement, whereby the operator or operators are protected from falling ice.

Alternatively, the starting of the de-icing process is effected from beyond the sighting distance of the danger region, in particular from a remote monitoring center.

The safety of people and / or animals is further improved if a warning signal, in particular an optical or acoustic warning signal, is produced, preferably before the start of the de-icing process, which, in the danger region, is perceptible to people and / or which acts as a deterrent to animals. For example, a tone or noise can be produced at a volume that drives people and animals away from the danger region. For people, this can also be accompanied by a loudspeaker announcement announcing the de-icing process and a warning about falling ice, with a request to leave the danger region.

Advantageously, the de-icing process is interrupted, in particular automatically, if a wireless or wired connection, in particular a signal connection or communication connection, between the operating device and the de-icing control device is not working correctly or has been interrupted or is interrupted.

This ensures that the de-icing process is only initiated, carried out or continued when the de-icing process can be interrupted by means of the operating device.

This ensures increased safety in the danger region even if technical problems exist or occur with a connection, with signal transmission or with communication between the operating device and the de-icing control device.

Furthermore, if the monitoring of the danger region is carried out by means of a monitoring device, it is possible for the danger region to be monitored remotely, i.e., without an operator having a direct view of the danger region. This makes it possible, in particular, for the de-icing of a wind energy installation to be initiated and monitored from a remote control room, such as is known, for example, for the central remote monitoring of many wind energy installations.

If the de-icing process is automatically interrupted as soon as the monitoring device or a signal transmission from or to the monitoring device is not working correctly, safety in the danger region is ensured even in the event of technical problems.

According to a variant of the invention, during the de-icing process, signals from the monitoring device, in particular signals from an optical camera, an infrared camera, a light barrier and / or a motion sensor of the monitoring device, are automatically evaluated and the de-icing process is automatically interrupted when this evaluation indicates that a veto situation has occurred or is imminent, or the system is constructed so as to automatically evaluate signals from the monitoring device, in particular signals from an optical camera, an infrared camera, a light barrier and / or a motion sensor of the monitoring device, during the de-icing process and to automatically interrupt the de-icing process if this evaluation shows that a veto situation has occurred or is imminent. It is also possible to use several of these signals at the same time.

As an alternative or in addition to this, the monitoring of the danger region during the de-icing process, which is carried out, for example, by an operator, is supplemented by automatic monitoring and, if necessary, automatic interruption of the de-icing process, thus further increasing safety.

Preferably, the de-icing process is also automatically interrupted if a parameter of the wind conditions, in particular a wind speed or a wind direction, or an operating parameter of the wind energy installation, in particular a speed of rotation of a rotor blade of the wind energy installation, lies outside a respective predetermined tolerance range. This ensures that released ice falls exclusively into the monitored danger region and that the de-icing process is not carried out or continued or cannot be initiated if there is a risk that people or animals and / or objects to be protected from falling ice outside the monitored danger region are or may be at risk from falling ice.

The safety of the method according to the invention is further increased if, after a de-icing process, a confirmation switch on an operational control device of the wind energy installation is operated and, after the confirmation, the operational control device switches over to an automatic operation of the wind energy installation. 5 ltis particularly advantageous within the scope of the invention if at least two wind energy installations of a wind farm are de-iced simultaneously or successively, in particular using the same operating device and / or the same monitoring device.

This makes the de-icing of several wind energy installations at the same location particularly efficient.

The object is also achieved by a de-icing system having the features of claim 8 for a wind energy installation.

The de-icing system according to the invention allows in particular the de-icing of the wind energy installation according to the method according to the invention described above. A corresponding de-icing control device is either integrated or can be integrated into an existing operational control device, or is used separately, for example by retrofitting a wind energy installation.

The operating device can be operated from a location with a direct view of the danger region, so that, for example, an operator can oversee and thus monitor the danger region and operate the operating device at the same time, or a monitoring device is provided for the danger region so that there is no need for a direct view of the danger region. Both alternatives can be combined within the scope of the invention.

According to a variant of the invention, the operating device, in particular for the first alternative for monitoring the danger region, is constructed so as to be portable and so that it can be connected or is connected to the de-icing control device by means of signal cable and / or in a wireless manner. This makes it possible for an operator to be mobile with the operating device in the vicinity of the wind energy installation, but outside the danger region, and to be able to initiate and / or interrupt the de-icing process by means of the operating device from a flexibly selectable location outside the danger region. In particular, a portable operating device gives the operator the opportunity to guickly change location or position, for example in the event that, contrary to expectations, there is a risk of falling ice at the operator's location, so that the safety of the operator is further increased, or that a more suitable location with a better overview of the danger region can be found.

A wireless connection between the operating device and the de-icing control device is preferably made via a secure radio connection. In the context of the invention, this is understood in particular to mean a radio connection in which suitable technical measures are provided to ensure error-free and undisturbed communication via the radio connection. For example, measures are provided for validating transmitted signals, measures for securing communication against external interference, in particular by encrypting the transmitted signals and / or measures for checking the radio connection, in particular by exchanging control signals.

The monitoring device preferably comprises an optical camera, an infrared camera, a light barrier and / or a motion sensor. The advantage of the optical camera is, in particular, that images of the danger region can be made available to an operator in real time without major technical effort. An infrared camera makes it possible to distinguish warm objects such as people, animals or vehicles with running engines from cold objects such as ice, in particular in the dark or when there is snow. By means of light barriers, gate contacts and the like, it is possible in particular to monitor the boundaries of the danger region, which is preferably also fenced in. A motion sensor makes it possible to detect people, animals or moving vehicles in the danger region.

It is particularly preferred if the de-icing system comprises a warning device for producing a warning signal, in particular an acoustic or optical warning signal, which, in the danger region, is perceptible to people and / or which acts as a deterrent to animals. This makes it possible, in particular, for uninvolved third parties to be warned not to enter the danger region during the de-icing process and for animals, in particular wild animals, to be chased away from the danger region.

A particularly preferred development of the de-icing system provides that the de- icing control device or the operating device comprises at least one signal input for receiving a signal, in particular an automatically generated signal, wherein the de-

icing control device or the operating device is constructed so as to automatically interrupt the de-icing process when triggered by a signal received at the signal input.

It is also advantageous if an evaluation device connected to the signal input for evaluating a signal from the monitoring device, in particular a signal from an optical camera, an infrared camera, a light barrier and / or a motion sensor, is provided, wherein an automatic signal may be generated by means of the evaluation device and may be transmitted to the signal input of the de-icing control device or the operating device.

This enables fully automatic monitoring of the danger region and a corresponding automatic interruption of the de-icing process in the event of a veto situation, which can be provided in particular in addition to a manual interruption option of the de-icing process by an operator by means of the operating device.

Advantageously, it is provided that an automatically generated veto can be manually overridden or is overridden if a visual inspection of the danger region shows that there is no specific hazard. This allows de-icing to take place and the wind energy installation to be put back into operation if monitoring devices have incorrectly reported a veto situation without a veto situation actually existing.

Advantageously, an operational control device of the wind energy installation comprises a confirmation switch, wherein the operational control device is constructed so as to transition again into an automatic operation of the wind energy installation after a de-icing process only after a confirmation has taken place at the confirmation switch. This measure serves to ensure the safety of the operation of the wind energy installation and is particularly useful when the method according to the invention is carried out by an operator on site, i.e., at the location of the wind energy installation.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments according to the invention can satisfy individual features or a combination of several features.

The invention will be described below, without limiting the general inventive idea, on the basis of exemplary embodiments and with reference to the drawings,

wherein reference is expressly made to the drawings with respect to all details according to the invention which are not explained in more detail in the text. In the drawings:

Fig. 1 schematically shows an exemplary de-icing system according to the invention;

Fig. 2 schematically shows a further exemplary de-icing system according to the invention;

Fig. 3a shows a schematic block diagram of a de-icing system according to the invention,

Fig. 3b shows a schematic block diagram of a modification of the de-icing system from Fig. 3a; and

Fig. 3c schematically shows a block diagram of an embodiment of the de-icing system according to the invention.

In the drawings, the same or similar elements and/or parts are provided with the same reference numbers in each case, such that a renewed presentation is dispensed with in each case.

Fig. 1 shows a schematic representation of a de-icing system 1 according to the invention. The de-icing system 1 comprises a wind energy installation 10 with three rotor blades 11 and a de-icing control device 12. By means of the de-icing control device 12, a de-icing process for the wind energy installation 10, in particular for the rotor blades 11 of the wind energy installation 10, can be carried out, in which ice adhering to the wind energy installation 10 or the rotor blades 11 is at least partially released. For this purpose, known de-icing methods can be appropriately applied and / or known de-icing devices can be appropriately used.

The released ice falls to the ground in a danger region 20 shown in dashed lines below the wind energy installation 10. The danger region 20 is generously dimensioned. In particular, it must be taken into account that falling ice may possibly be blown away by the wind or thrown sideways from the rotor blades by a rotational movement of the rotor blades 11 and thus only hit the ground at some distance from the wind energy installation 10. In addition, a surrounding region can be included from which people, animals or vehicles can reach the immediately dangerous region in a short time.

The de-icing system 1 comprises an operating device 16 by means of which the de-icing process can be initiated and interrupted. The operating device 16 is constructed as a portable radio operating device, wherein the de-icing control device 12 and the operating device 16 each comprise an antenna 14 for a secure radio connection between the de-icing control device 12 and the portable operating device 16.

The portable operating device 16 enables an operator (not shown) to leave the danger region 20 with the operating device 16 and to go to a location from which the danger region can be directly monitored, in particular overseen or viewed.

From this location, the de-icing process is then initiated by means of the portable operating device 16.

If a dangerous situation or a veto situation is observed during the de-icing process, for example because a person or an animal is seen in or near the danger region or because it is determined that an object to be protected is situated in the danger region 20, the de-icing process and thus also the falling ice can be interrupted immediately by the operator via the operating device 16.

In addition, the operator can change location at any time with the operating device 20 16, for example if it becomes apparent that the current location is not safe from falling ice. This ensures the safety of the operator at all times and at the same time ensures that the de-icing process can be interrupted at any time. Monitoring by the operator or a camera can alternatively be carried out from the air, for example by unmanned drones.

The radio connection between the operating device 16 and the de-icing control device 12 is also constantly monitored, for example by the operating device 16 and the de-icing control device 12 exchanging control signals at regular intervals.

As soon as a fault in the radio connection occurs or is detected, i.e., if a situation occurs in which the de-icing process cannot be interrupted by means of the operating device 16 because a corresponding signal cannot be transmitted to the de-icing control device, the de-icing process is automatically interrupted by the de- icing control device 12.

As a rule, each wind energy installation 10 has its own operational control system.

The de-icing control device 12 can be a component of this operational control system, but it can also be independent of it.

The de-icing system 1 shown in Fig. 1 can also comprise several wind energy installations 10, each having a de-icing control device 12. It is particularly advantageous if an operating device 16 is used which can be connected to all de- icing control devices 12. The de-icing system according to the invention is therefore also suitable for de-icing an entire wind farm with many wind energy installations 10, wherein the individual wind energy installations 10 can be de-iced together, in smaller groups of a few wind energy installations or individually.

An alternative embodiment of the invention is shown schematically in Fig. 2. Here, too, a wind energy installation 10 is provided with a de-icing control device 12, by means of which a de-icing process can be carried out. The de-icing process can be initiated and interrupted by means of an operating device 16, whereby the operating device 16 does not have a direct view of the danger region 20. For example, the operating device 16 is constructed as a remote monitoring device for the wind energy installation 10 and is installed in a control room remote from the wind energy installation 10.

A camera 40 is provided for monitoring the danger region 20 and is connected to a monitor 42 located in the remote control room. This makes it possible to monitor the danger region 20 by means of the camera 40 from the control room. The camera 40 is a web cam, for example.

Advantageously, the camera 40 and the connection between the camera 40 and the monitor 42 are automatically monitored, whereby the de-icing process is automatically interrupted if monitoring of the danger region 20 from the control room is disrupted for technical reasons. This monitoring function is provided, for example, by means of the operating device 16 or the de-icing control device 12.

In the de-icing system 1 shown in Fig. 2, there is no operator on site, so that direct control of the danger region 20 is not possible. In particular, the operator cannot personally intervene and, for example, ask people to leave the danger region 20 or scare away animals from the danger region.

Therefore, the de-icing system 1 advantageously comprises a warning device 50 with a signal lamp 52 and a loudspeaker 54. This makes it possible, for example by means of optical and acoustic warning signals, to warn people in the danger region 20 of the de-icing process and to scare away animals, in particular wild animals, from the danger region 20. In addition, it is conceivable that people who are observed in the danger region 20 via the camera 40 and the monitor 42 can be asked to leave the danger region 20 via loudspeaker announcements.

Fig. 3a shows a schematic block diagram of a further de-icing system 1 according to the invention. A wind energy installation 10 comprises a de-icing control device 12 which has a signal input 13. An operating device 16 is connected to this signal input 13, by means of which a de-icing process for the wind energy installation 10 that can be carried out by the de-icing control device 12 can be initiated and / or interrupted, for example by transmitting a corresponding signal from the operating device 16 to the de-icing control device 12.

The region around the wind energy installation 10 is also automatically monitored by means of various technical devices. For example, an optical camera 62 provides images of the danger region 20 in real time. An infrared camera 63 allows warm objects such as people or animals to be identified. In addition, at least one light barrier 64 is provided, for example at an entrance to the danger region 20. A motion sensor 65 is designed, for example, to distinguish between movements on the ground, for example of people or wild animals, and falling ice.

Furthermore, it is conceivable that the region around the wind energy installation 10 is fenced in, wherein, for example, a breaker contact in a gate of the fence is also connected to the evaluation device. The various monitoring devices can be provided individually or in any combination within the scope of the invention.

The optical camera 62, the infrared camera 63, the light barrier 64 and the motion sensor 65 are connected to an evaluation device 60, which receives the respective signals and evaluates whether a veto situation exists because, for example, a person, an animal and / or an object to be protected from falling ice is situated in the danger region.

In order to ensure that falling ice is not carried out of the monitored region by strong wind before it falls to the ground, an anemometer 66 is also provided, which is also connected to the evaluation device 60 and whose signals are also evaluated. Such anemometers 66 are usually already present in the operational control systems of wind energy installations.

In addition, the wind energy installation 10 itself is connected to the evaluation device 60 in order to provide the evaluation device 60 with operating parameters of the wind energy installation 10, for example the speed of rotation of the rotor blades 11 of the wind energy installation 10. This makes it possible for the evaluation device 60 to also detect a situation in which, for example, falling ice outside the monitored region cannot be ruled out due to the high speed of rotation of the rotor blades 11.

As soon as the evaluation device 60 determines that a veto situation exists, is imminent or may exist in the monitored region around the wind energy installation 10 or that the danger region 20 in which falling ice is to be expected extends beyond the monitored region, the evaluation device 60 generates a veto signal which is transmitted to the de-icing control device 12. However, this last case can be manually overridden if a visual inspection of the extended region shows that there is no specific dangerous situation.

The de-icing control device 12 has a second signal input 13". The de-icing control device 12 is constructed so as to interrupt the de-icing process of the wind energy installation 10 if a veto signal is present at the signal input 13' or a veto signal is received via the signal input 13". In this case, the de-icing process is also not started if a signal to initiate the de-icing process is present or received at the signal input 13 from the operating device 16.

An alternative connection of the operating device 16, the evaluation device 60 and the de-icing control device 12 is shown schematically in Fig. 3b. The communication between the operating device 16 and the de-icing control device 12 takes place indirectly via the evaluation device 60.

A signal for initiating the de-icing process from the operating device 16 is only forwarded by the evaluation device 60 to the de-icing control device 12 if an evaluation by means of the evaluation device does not result in a veto situation or other dangerous situation. Likewise, a signal to interrupt the de-icing process is automatically generated by means of the evaluation device 60 and transmitted to the de-icing control device 12 as soon as the evaluation results in a veto situation or other dangerous situation.

This also ensures that the de-icing process is only carried out or continued if a corresponding command or signal is present from the operating device 16 and no veto situation has been identified. If necessary, however, the de-icing process can still be initiated and interrupted by manually operating an operating device on site if a visual inspection by an operator shows that an automatically identified hazard does not actually exist.

Fig. 3c shows a schematic block diagram of an embodiment of the de-icing system according to the invention. In this case, the operating device 16 acts directly on the de-icing control device 12 of the wind energy installation 10, without the operational control system or the operational control device 18 of the wind energy installation 10 being interposed. Such a system is particularly advantageous as a retrofit system. The connection shown by a dotted line between the operating device 16 and the de-icing control device 12 is, for example, wireless.

The de-icing control device 16 optionally has a connection to the operational control device 18, indicated by a dashed line, in order to exchange status signals, such as feedback, functionality after self-test, etc., between the de-icing control device 12 and the operational control device 18. For safety reasons, in this embodiment, a confirmation switch 19 is advantageously provided on the operational control device 18, which must be operated by the operator after completion of a de-icing process so that the operational control device 12 can return to automatic operation.

List of Reference Signs 1 De-icing system 10 Wind turbine generator 12 De-icing control device 13, 13'Signal input 14 Antenna 16 Operating device 18 Operational control device 19 Confirmation switch 20 Danger region 40 Camera 42 Monitor 50 Warning device 52 Signal lamp 54 Loudspeaker 60 Evaluation device 62 Optical camera 63 Infrared camera 64 Light barrier

65 Motion sensor 66 Anemometer

Claims

EP2 753 826. METHOD AND SYSTEM FOR REMOVAL OF PARTS FROM A WIND POWER PLANT PATENT CLAIMS

1. A method for removing ice from a wind power plant (10), which includes an ice removal control device (12), which can be used to carry out an ice removal process in which the ice adhering to the wind power plant (10) is at least partially detached and falls into the danger area (20) below the wind power plant (10), where the following method steps are included: - the danger area (20) is monitored in terms of whether there is a draft situation where a person, animal and/or an object to be protected from falling ice is in the danger area (20); - the de-icing process is started using the operating equipment (16) from outside the danger area (20), if there is no draft situation; and - monitoring of the danger area (20) is continued during the de-icing process, in which case the de-icing process is interrupted with the help of the operating equipment (16) as soon as a traction situation occurs or is expected, in which case the control of the danger area (20) and/or the initiation of the de-icing process takes place in the danger area (20) by at least one operator within sight from a location outside the danger area (20) — from a location from which the danger area can be directly monitored and from which the operating equipment (16) can be used, in which case the operating equipment (16) is adapted to be portable and can be connected or is connected with a signal cable and/or wirelessly, especially with the help of a secure radio connection, to the de-icing control equipment (12), or that monitoring equipment (40; 42:62—65) has been provided, with the help of which the danger area is monitored, in which case the initiation of the de-icing process takes place outside the visual range of the danger area, especially from the remote control center , whereby during the de-icing process the monitoring equipment (40, 32; 62—65) signals, in particular the signals of the monitoring equipment (40, 42; 62—65) optical camera (40, 62), infrared camera (63), light curtain (64) and/or — motion sensor (65) are automatically analyzed and the deicing process

EP2 753 806 is automatically suspended when this analysis results that a pull situation has occurred or is expected.

2. The method according to claim 1, characterized by the fact that before the de-icing process is started, an optical or acoustic warning signal is produced in particular, which is perceptible to people in the danger area (20) and/or has a startling effect on animals.

3. The method according to claim 1 or 2, characterized in that the de-icing process is interrupted when the wireless or cable-connected connection between the operating equipment (16) and the de-icing control equipment (12) is — disturbed or interrupted or is disturbed or interrupted.

4. The method according to one of the patent claims 1-3, characterized in that the monitoring of the danger area (20) is carried out by means of monitoring equipment (40, 42; 62—65), whereby the de-icing process is automatically interrupted especially when the monitoring equipment (40, 42; 62—65 ) or the signal transmission from the monitoring equipment (40, 42; 62— 65) or to the monitoring equipment has been disturbed or is being disturbed.

5. The method according to one of claims 1-4, characterized in that the de-icing process is automatically interrupted when a parameter of the wind conditions, in particular wind speed or wind direction, or an operating parameter of the wind power plant (10), in particular the rotation speed of the rotor blade (11) of the wind power plant (10), is in each case a preset tolerance range outside.

6. The method according to one of the patent claims 1-5, characterized in that after the de-icing process, an acknowledgment is made with the acknowledgment switch (19) in the operation control equipment (18) of the wind power plant (10) and after the acknowledgment, the operation control equipment (18) switches to the automatic operation of the wind power plant (10).

7. The method according to one of the patent claims 1-6, characterized in that the ice is removed from at least two wind power plants (10) of the wind farm at the same time or consecutively, especially using the same operating equipment (16) and/or the same monitoring equipment (40, 42; 62-65).

EP2 753 806

8. De-icing system (1) for a wind power plant (10), which comprises a wind power plant (10), which includes a de-icing control device (12), which can be used to carry out an ice removal process, in which the ice adhering to the wind power plant (10) is at least partially removed and it falls to a hazard below the wind power plant to the area (20), whereby the de-icing system comprises operating equipment (16) for starting and/or interrupting the de-icing process, characterized by the fact that the operating equipment (16) can be used from a location outside the danger area (20), from which the danger area (20) can be monitored or is monitored at least partially directly and/or with the help of the monitoring equipment (40, 42; 62—65) comprised by the de-icing system (1), especially within sight of the danger area (20), in which case the operating equipment (16) is adapted to be portable and can be connected or is connected by a signal cable and /or wirelessly, especially by means of a secure radio connection, to the de-icing control equipment (12), or from a remote control center, in which case the system is adapted during the de-icing process to automatically analyze the control equipment (40, 32; 62—65) signals, in particular the signals of the monitoring equipment (40, 42; 62—65) optical camera (40, 62), infrared camera (63), light curtain (64) and/or motion sensor (65), are automatically analyzed and the de-icing process is automatically interrupted, when this analysis results that a withdrawal situation has occurred or is expected.

9. De-icing system (1) according to claim 8, characterized in that the monitoring equipment (40, 42; 62—65) comprises an optical camera (40, 62), an infrared camera (63), a light curtain (64) and/or a motion sensor (65).

10. The de-icing system (1) according to claim 8 or 9, characterized in that the de-icing system (1) comprises a warning device (50, 52, 54) in particular for producing an acoustic or optical warning signal that can be detected and/or affected by people in the danger area (20) frightening to animals.

11. The de-icing system (1) according to one of claims 8-10, characterized in that the de-icing control equipment (12) or the operating equipment (16) has at least one signal input (13, 13') especially for receiving an automatically generated signal, whereby the de-icing control equipment (12) or the operating equipment ( 16) is adapted to interrupt the signal received at the signal input (13, 13').

EP2 753 806 automatically triggered deicing process, in which case the analysis equipment (60) connected to the signal input (13, 13') has been created, the signal of the monitoring equipment (40, 42; 62—65), in particular the optical camera (40, 62), the infrared camera (63), the light curtain (64) and/or for analyzing the signal of the motion sensor (65), in which case an automatic signal can be generated with the help of the analysis equipment (60) and it can be transmitted to the signal input (13, 13') of the deicing control equipment (12) or the operating equipment (16).

12. The de-icing system (1) according to one of claims 8-11, characterized in that the operational control equipment (18) of the wind power plant (10) has a reset switch (19), whereby the operational control equipment (18) is adapted to move again after the de-icing process only after the reset with the reset switch (19) for the automatic operation of the wind power plant (10).