Blade condition monitoring device for a wind turbine and wind turbine

Abstract

The application discloses a blade state monitoring device for a wind driven generator and the wind driven generator. The blade state monitoring device comprises a detection assembly, a communication module and a first energy supply assembly. The detection assembly is arranged on a blade of the wind driven generator and is used for detecting icing state of the blade. The communication module is in communication connection with the detection assembly and is used for receiving and transmitting detection results of the detection assembly. The first energy supply assembly comprises a light source and a photoelectric converter. The light source is arranged at a root of the blade. The light source is connected with the photoelectric converter and is used for emitting light beams to the photoelectric converter. The photoelectric converter is arranged in an inner cavity of the blade and is electrically connected with the detection assembly. In the blade state monitoring device, the detection assembly arranged on the blade improves the accuracy of the icing state detection of the blade. The photoelectric converter receives the light beams emitted by the light source and converts the light beams into electric energy to supply power to the detection assembly, which is not affected by external environment changes. The long-term stable operation of the detection assembly is ensured, and the accuracy of the icing state detection of the blade is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of blade monitoring, and particularly relates to a blade state monitoring device for a wind turbine and the wind turbine. BACKGROUND

[0002] The blade of a wind turbine is a main component for obtaining wind energy in the wind turbine. The blade of the wind turbine is prone to icing when the wind turbine is operated in winter. In order to ensure that the wind turbine can be stably operated in a low-temperature environment, a monitoring device is usually used to detect the icing condition of the blade. The existing monitoring device is usually powered by taking power from a nacelle of the wind turbine or by using solar power. However, the monitoring device needs to be installed on the top of the nacelle when taking power from the nacelle, and the distance between the monitoring device and the blade is far, which leads to low accuracy of icing detection. The solar power is significantly affected by the weather, and it is difficult to stably supply power to the monitoring device, which further affects the accuracy of icing detection. SUMMARY

[0003] In view of the above defects or shortcomings, the present application provides a blade state monitoring device for a wind turbine and the wind turbine, which aims to solve the technical problem of low accuracy of icing detection of the existing monitoring device.

[0004] In order to achieve the above purpose, the present application provides a blade state monitoring device for a wind turbine, which comprises:

[0005] A detection assembly arranged on a blade of the wind turbine and used for detecting an icing state of the blade.

[0006] A communication module in communication connection with the detection assembly and used for receiving and transmitting a detection result of the detection assembly.

[0007] A first energy supply assembly comprising a light source and a photoelectric converter, the light source being arranged at a root portion of the blade, the light source being connected with the photoelectric converter and used for emitting a light beam to the photoelectric converter, the photoelectric converter being arranged in an inner cavity of the blade and electrically connected with the detection assembly.

[0008] In the embodiment of the present application, the communication module comprises a communication controller and a signal transceiver assembly, the communication controller is electrically connected with the detection assembly and the signal transceiver assembly respectively, the signal transceiver assembly is in communication connection with a general controller of the wind turbine, and the communication controller is configured to:

[0009] Determine the icing state of the blade according to the detection result of the detection assembly, and control the signal transceiver assembly to send the detection result of the detection assembly to the general controller.

[0010] In the embodiment of the present application, the signal transceiver assembly comprises a wireless transmitter and a wireless receiver, the wireless transmitter is arranged in the inner cavity of the blade, the wireless transmitter is electrically connected with the communication controller and is in communication connection with the wireless receiver, and the wireless receiver is arranged at the blade root of the blade and is in communication connection with the general controller.

[0011] In the embodiment of the present application, the detection assembly comprises a blade temperature sensor and an icing thickness sensor, the blade temperature sensor is arranged in the inner cavity of the blade and is used for detecting a blade temperature value, the icing thickness sensor is arranged on the outer surface of the blade and is used for detecting an icing thickness value, the blade temperature sensor is electrically connected with the communication controller and the photoelectric converter respectively, and the icing thickness sensor is electrically connected with the communication controller and the photoelectric converter respectively.

[0012] In the embodiment of the present application, the icing state of the blade is determined according to the detection result of the detection assembly, and the signal transceiver assembly is controlled to send the detection result of the detection assembly to the general controller, comprising:

[0013] The icing state of the blade is determined according to the blade temperature value, and the signal transceiver assembly is controlled to send the blade temperature value and the icing thickness value to the general controller.

[0014] In the embodiment of the present application, the icing state of the blade is determined according to the blade temperature value, and the signal transceiver assembly is controlled to send the blade temperature value and the icing thickness value to the general controller, comprising:

[0015] In the case that the blade temperature value is in the first preset temperature range, it is determined that the blade is in the non-icing state, and the signal transceiver assembly is controlled to send the blade temperature value and the icing thickness value to the general controller at a first preset frequency;

[0016] In the case that the blade temperature value is in the second preset temperature range, it is determined that the blade is in the icing state, and the signal transceiver assembly is controlled to send the blade temperature value and the icing thickness value to the general controller at a second preset frequency;

[0017] Wherein, any value in the first preset temperature range is greater than any value in the second preset temperature range, and the first preset frequency is lower than the second preset frequency.

[0018] In the embodiment of the present application, the blade state monitoring device further comprises a second energy supply assembly, the second energy supply assembly comprises a power supply battery and a power distributor, the power supply battery is electrically connected with the power distributor and is used for supplying power to the power distributor, and the photoelectric converter is electrically connected with the detection assembly through the power distributor.

[0019] In the embodiment of the present application, the communication controller is further configured to:

[0020] In the case that it is determined that the detection assembly is insufficient in electric energy, the power supply battery is controlled to supply power to the power distributor.

[0021] In the embodiment of the present application, the first energy supply assembly further comprises a connecting optical fiber, and the light source member is connected with the photoelectric converter through the connecting optical fiber.

[0022] In order to achieve the above-mentioned purpose, the present application further provides a wind power generator, which comprises a total controller, a blade deicing device and a blade state monitoring device for the wind power generator according to the above-mentioned device.

[0023] Through the above-mentioned technical solution, the blade state monitoring device for the wind power generator and the wind power generator provided by the embodiment of the present application have the following beneficial effects:

[0024] In the technical solution of the present application, the detection assembly is arranged on the blade and can detect the icing state of the blade, the communication module receives the detection result of the icing state of the blade by the detection assembly and sends it to the total controller of the wind power generator to realize the monitoring of the icing state of the blade, and the first energy supply assembly is used for supplying power to the detection assembly, the light source member of the first energy supply assembly is arranged at the root of the blade and connected with the photoelectric converter, and the photoelectric converter is arranged in the inner cavity of the blade and electrically connected with the detection assembly, the light source member is used for emitting a light beam to make the light beam conduct to the photoelectric converter, the photoelectric converter converts the light energy of the light beam into electric energy and supplies it to the detection assembly, so that the detection assembly can detect the icing state of the blade, in the blade state monitoring device of the present application, the detection assembly arranged on the blade improves the accuracy of the icing state detection of the blade, the photoelectric converter receives the light beam emitted by the light source member and converts it into electric energy to supply power to the detection assembly, which is not affected by the change of external environment, so that the first energy supply assembly can stably supply power to the detection assembly, ensuring the long-term stable operation of the detection assembly and improving the accuracy of the icing state detection of the blade.

[0025] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0027] Figure 1 is a structural block diagram of a blade state monitoring device according to an embodiment of the present application;

[0028] Figure 2 is a structural block diagram of a wind power generator according to an embodiment of the present application;

[0029] Figure 3 is a flowchart of detecting icing state of a blade by a blade state monitoring device according to an embodiment of the present application;

[0030] Figure 4 is a flowchart of detecting icing state of a blade by a blade state monitoring device according to another embodiment of the present application.

[0031] Reference Signs List

[0032] DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0034] The blade state monitoring device for a wind turbine of the present application is described below with reference to the accompanying drawings.

[0035] As shown in Figure 1 The present application provides a blade state monitoring device for a wind turbine, which comprises a detection assembly 10, a communication module 20 and a first energy supply assembly 30. The detection assembly 10 is arranged on a blade of the wind turbine and is used to detect the icing state of the blade. The communication module 20 is in communication connection with the detection assembly 10 and is used to receive and transmit the detection results of the detection assembly 10. The first energy supply assembly 30 comprises a light source 31 and a photoelectric converter 32. The light source 31 is arranged at the root of the blade. The light source 31 is connected with the photoelectric converter 32 and is used to emit a light beam to the photoelectric converter 32. The photoelectric converter 32 is arranged in the inner cavity of the blade and is electrically connected with the detection assembly 10.

[0036] Specifically, the detection assembly 10 is arranged on the blade and can detect the icing state of the blade, the communication module 20 receives the detection result of the icing state of the blade detected by the detection assembly 10 and sends the detection result to the general controller 200 of the wind driven generator to realize monitoring of the icing state of the blade, and the first power supply assembly 30 is used for supplying power to the detection assembly 10, the light source part 31 of the first power supply assembly 30 is arranged at the root of the blade and is connected with the photoelectric converter 32, and the photoelectric converter 32 is arranged in the inner cavity of the blade and is electrically connected with the detection assembly 10, the light source part 31 is used for emitting a light beam to make the light beam conduct to the photoelectric converter 32, the photoelectric converter 32 converts the light energy of the light beam into electric energy and supplies the electric energy to the detection assembly 10, so that the detection assembly 10 can detect the icing state of the blade, in the blade state monitoring device in the embodiment of the application, the detection assembly 10 is arranged on the blade to improve the accuracy of the detection of the icing state of the blade, the photoelectric converter 32 receives the light beam emitted by the light source part 31 and converts the light beam into electric energy to supply power to the detection assembly 10, which is not affected by the change of the external environment, so that the first power supply assembly 30 can stably supply power to the detection assembly 10, and the long-term stable operation of the detection assembly 10 is ensured, and the accuracy of the detection of the icing state of the blade is improved.

[0037] In the embodiment of the application, the communication module 20 comprises a communication controller 21 and a signal transceiver assembly 22, the communication controller 21 is electrically connected with the detection assembly 10 and the signal transceiver assembly 22 respectively, the signal transceiver assembly 22 is in communication connection with the general controller 200 of the wind driven generator, and the communication controller 21 is configured to: determine the icing state of the blade according to the detection result of the detection assembly 10, and control the signal transceiver assembly 22 to send the detection result of the detection assembly 10 to the general controller 200.

[0038] Specifically, the detection assembly 10 is electrically connected with the communication controller 21, the communication controller 21 is electrically connected with the signal transceiver assembly 22, the signal transceiver assembly 22 is in communication connection with the general controller 200, the detection assembly 10 is used for detecting the icing state of the blade, and the signal transceiver assembly 22 is used for sending the detection result of the detection assembly 10 to the general controller 200 to realize monitoring of the icing state of the blade. As shown in Figure 3 Figure 3 is a flowchart of the detection of the icing state of the blade by the blade state monitoring device in an embodiment of the application, comprising:

[0039] Step S10, obtaining the detection result of the detection assembly 10;

[0040] Specifically, the communication controller 21 obtains the detection result of the detection assembly 10 on the icing state of the blade.

[0041] Step S20, determining the icing state of the blade according to the detection result of the detection assembly 10;

[0042] ​Specifically, the communication controller 21 judges the icing state of the blade according to the detection result of the detection assembly 10.

[0043] In step S30, the communication controller 21 controls the signal transceiver assembly 22 to send the detection result of the detection assembly 10 to the general controller 200 according to the icing state of the blade.

[0044] Specifically, the communication controller 21 controls the signal transceiver assembly 22 to send the detection result of the icing state of the blade to the general controller 200 in the case of determining the icing state of the blade, so as to realize the detection of the icing state of the blade. The detection assembly 10 is arranged on the blade and can accurately detect the icing state of the blade. The communication controller 21 can receive the detection result of the icing state of the blade and send it to the general controller 200 through the signal transceiver assembly 22. The icing state of the blade is accurately detected and the response time is fast, so that the running stability of the wind turbine in a low-temperature environment is improved.

[0045] In the embodiment of the application, the signal transceiver assembly 22 comprises a wireless transmitter 221 and a wireless receiver 222. The wireless transmitter 221 is arranged in the inner cavity of the blade and is electrically connected with the communication controller 21 and communicatively connected with the wireless receiver 222. The wireless receiver 222 is arranged at the blade root of the blade and is communicatively connected with the general controller 200.

[0046] As shown in Figure 1 and Figure 2 , the wireless transmitter 221 is electrically connected with the communication controller 21 and arranged in the inner cavity of the blade, so that the wireless transmitter 221 can quickly receive the detection result of the icing state of the blade sent by the communication controller 21. The wireless receiver 222 is arranged at the blade root of the blade. The wireless transmitter 221 is wirelessly communicatively connected with the wireless receiver 222. The wireless transmitter 221 sends the detection result to the wireless receiver 222 in the case of receiving the detection result of the icing state of the blade, so that the wireless receiver 222 can send the detection result of the icing state of the blade to the general controller 200, realizing accurate detection of the icing state of the blade and improving the stability of the wind turbine in a low-temperature environment. Moreover, the wireless transmitter 221 and the wireless receiver 222 can transmit the detection result of the icing state of the blade without wire connection, improving the anti-interference and lightning protection performance of the signal transceiver assembly 22, and further improving the running stability and safety of the blade state monitoring device. Furthermore, the wireless receiver 222 can be communicatively connected with the general controller 200 through a cable, further improving the transmission speed of the detection result.

[0047] In the embodiment of the present application, the detection assembly 10 comprises a blade temperature sensor 11 and an icing thickness sensor 12, the blade temperature sensor 11 is arranged in the inner cavity of the blade and used for detecting the blade temperature value, the icing thickness sensor 12 is arranged on the outer surface of the blade and used for detecting the icing thickness value, the blade temperature sensor 11 is electrically connected with the communication controller 21 and the photoelectric converter 32 respectively, and the icing thickness sensor 12 is electrically connected with the communication controller 21 and the photoelectric converter 32 respectively.

[0048] As shown in Figure 1 The blade temperature sensor 11 is arranged on the inner surface of the blade to accurately detect the blade temperature value, the icing thickness sensor 12 is arranged on the outer surface of the blade to accurately detect the icing thickness value of the outer surface of the blade, the communication controller 21 can receive the blade temperature value and the icing thickness value and control the wireless transmitter 221 to transmit the blade temperature value and the icing thickness value to the wireless receiver 222, so that the wireless receiver 222 transmits the blade temperature value and the icing thickness value to the general controller 200, thereby realizing accurate monitoring of the blade temperature and the icing thickness of the blade surface, providing reliable data for blade deicing and ice melting, improving the stability of the low-temperature operation of the wind turbine, and the photoelectric converter 32 is electrically connected with the blade temperature sensor 11 and the icing thickness sensor 12 respectively, so that the photoelectric converter 32 can supply the electric energy converted from light energy to the blade temperature sensor 11 and the icing thickness sensor 12 respectively, ensuring the power supply of the blade temperature sensor 11 and the icing thickness sensor 12, so that the blade temperature sensor 11 and the icing thickness sensor 12 can operate stably for a long time, thereby improving the accuracy of the blade icing detection.

[0049] In the embodiment of the present application, the icing state of the blade is determined according to the detection result of the detection assembly 10, and the signal transceiver assembly 22 is controlled to send the detection result of the detection assembly 10 to the general controller 200, comprising: the icing state of the blade is determined according to the blade temperature value, and the signal transceiver assembly 22 is controlled to send the blade temperature value and the icing thickness value to the general controller 200.

[0050] Specifically, the communication controller 21 acquires the blade temperature value detected by the blade temperature sensor 11, and determines the icing state of the blade according to the blade temperature value, and controls the wireless transmitter 221 to send the blade temperature value detected by the blade temperature sensor 11 and the ice thickness value detected by the ice thickness sensor 12 to the wireless receiver 222 in the case of determining the icing state of the blade, so that the wireless receiver 222 can send the blade temperature value and the ice thickness value to the general controller 200, so that the general controller 200 can control the blade deicing device 300 to start or stop according to the blade temperature value and the ice thickness value, realize the rapid response of the blade icing, improve the stability of the wind turbine in low temperature operation, and the general controller 200 can also remotely transmit the blade temperature value and the ice thickness value to the central control room, so that the wind turbine operation and maintenance personnel can remotely monitor the blade temperature and the ice thickness on the blade surface, and further improve the operation safety.

[0051] Further, according to the blade temperature value, the icing state of the blade is determined, and the signal transceiver assembly 22 sends the blade temperature value and the ice thickness value to the general controller 200, which includes:

[0052] In the case that the blade temperature value is in the first preset temperature range, it is determined that the blade is in the non-icing state, and the signal transceiver assembly 22 sends the blade temperature value and the ice thickness value to the general controller 200 at a first preset frequency;

[0053] In the case that the blade temperature value is in the second preset temperature range, it is determined that the blade is in the icing state, and the signal transceiver assembly 22 sends the blade temperature value and the ice thickness value to the general controller 200 at a second preset frequency;

[0054] Wherein, any value in the first preset temperature range is greater than any value in the second preset temperature range, and the first preset frequency is lower than the second preset frequency.

[0055] As shown in Figure 4 , it is another embodiment of the blade state monitoring device of the present application, and the flowchart for detecting the icing state of the blade includes: Figure 4

[0056] Step S11, acquiring the blade temperature value detected by the blade temperature sensor 11;

[0057] Specifically, the communication controller 21 acquires the detection result of the blade temperature value by the blade temperature sensor 11.

[0058] Step S21, determining the icing state of the blade according to the blade temperature value;

[0059] ​Specifically, the communication controller 21 determines that the blade is in the non-icing state when the blade temperature value is in the first preset temperature range, and determines that the blade is in the icing state when the blade temperature value is in the second preset temperature range, and any value in the first preset temperature range is greater than any value in the second preset temperature range, that is, when the blade temperature value decreases from the first preset temperature range to the second preset temperature range, it can be determined that the blade temperature is low and the surface icing and icing occur.

[0060] Step S31, controlling the signal transceiver assembly 22 to send the blade temperature value and the icing thickness value to the general controller 200 at a first preset frequency when it is determined that the blade is in the non-icing state.

[0061] Step S32, controlling the signal transceiver assembly 22 to send the blade temperature value and the icing thickness value to the general controller 200 at a second preset frequency when it is determined that the blade is in the icing state.

[0062] Specifically, the first preset frequency is lower than the second preset frequency, the communication controller 21 controls the signal transceiver assembly 22 to transmit the blade temperature value and the icing thickness value at the first preset frequency when the blade is in the non-icing state, which reduces the energy consumption of the signal transceiver assembly 22 and prolongs the service life of the signal transceiver assembly 22, and the communication controller 21 controls the signal transceiver assembly 22 to transmit the blade temperature value and the icing thickness value at the second preset frequency when the blade is in the icing state, that is, the signal transceiver assembly 22 can transmit the blade temperature value and the icing thickness value at a high frequency when the blade is icing, so that the general controller 200 can start the blade deicing device 300 to melt and remove ice on the blade in time according to the blade temperature value and the icing thickness value, the response speed is fast, the operation stability and safety are greatly improved, and the general controller 200 can remotely transmit the blade temperature value and the icing thickness value to the central control room in time, so that the operation and maintenance personnel can monitor the blade icing state in real time and control the wind turbine to operate or stop according to the blade icing state, which greatly improves the accuracy of the blade icing state monitoring.

[0063] In the embodiment of the application, the blade state monitoring device further comprises a second energy supply assembly 40, the second energy supply assembly 40 comprises a power supply battery 41 and a power distributor 42, the power supply battery 41 is electrically connected with the power distributor 42 and is used for supplying power to the power distributor 42, and the photoelectric converter 32 is electrically connected with the detection assembly 10 through the power distributor 42.

[0064] As Figure 1As shown, the power supply battery 41 is electrically connected with the power distributor 42, the power distributor 42 is respectively electrically connected with the blade temperature sensor 11, the icing thickness sensor 12 and the photoelectric converter 32, the photoelectric converter 32 and the power supply battery 41 can provide electric energy to the power distributor 42, so that the power distributor 42 supplies electric energy to the blade temperature sensor 11 and the icing thickness sensor 12 respectively, the accurate detection of the blade temperature and the icing thickness on the blade surface is realized, and the power supply battery 41 can provide electric energy to the power distributor 42 when the light energy of the light source 31 is insufficient or fails, so that the power distributor 42 can provide sufficient electric energy to the detection assembly 10, and the energy supply stability and reliability are further improved.

[0065] Further, the communication controller 21 is further configured to control the power supply battery 41 to supply electric energy to the power distributor 42 in the case that it is determined that the electric energy of the detection assembly 10 is insufficient. Specifically, the communication controller 21 is respectively communicatively connected with the blade temperature sensor 11 and the icing thickness sensor 12, so that the communication controller 21 can determine whether the electric energy of the blade temperature sensor 11 and the icing thickness sensor 12 is sufficient according to the response time, the transmission frequency or the alarm signal of the blade temperature sensor 11 and the icing thickness sensor 12, the communication controller 21 is further communicatively connected with the power supply battery 41, so that the communication controller 21 can control the power supply battery 41 to supply electric energy to the power distributor 42 in the case that it is determined that the electric energy of the blade temperature sensor 11 or the icing thickness sensor 12 is insufficient, and then the power distributor 42 supplies electric energy to the blade temperature sensor 11 and the icing thickness sensor 12, so that the operation stability and reliability of the blade temperature sensor 11 and the icing thickness sensor 12 are further improved.

[0066] In the embodiment of the application, the first energy supply assembly 30 further comprises a connecting optical fiber 33, and the light source 31 is connected with the photoelectric converter 32 through the connecting optical fiber 33. Figure 1As shown, one end of the connecting optical fiber 33 is connected with the light source member 31, and the other end of the connecting optical fiber 33 is connected with the photoelectric converter 32, so that the light beam emitted by the light source member 31 can be conducted to the photoelectric converter 32 through the connecting optical fiber 33, the photoelectric converter 32 converts the light energy into electric energy and supplies the electric energy to the blade temperature sensor 11 and the ice thickness sensor 12 through the power distributor 42, realizing accurate detection of the blade temperature and the ice thickness on the blade surface, the connection of the light source member 31 and the photoelectric converter 32 through the connecting optical fiber 33 reduces energy consumption and improves light energy utilization, and the light source member 31 and the photoelectric converter 32 do not need to be connected by electricity, which greatly improves the anti-interference performance and lightning protection performance of the blade state monitoring device, the blade state monitoring device has a small size and will not damage the aerodynamic structure of the blade during installation, and has the advantages of convenient and quick installation; in addition, the light source member 31 can be provided as a light source member 31 with a battery, the light source member 31 emits light beams by being powered by the battery itself, and the light source member 31 can be replaced or charged by the battery in the case of power consumption, or the light source member 31 can also be provided as a power supply from the nacelle of the wind turbine, the light source member 31 is arranged at the root of the blade and is connected with the power supply equipment in the nacelle conveniently and quickly, and the stability and reliability of the light beam emitted by the light source member 31 are improved.

[0067] In addition, the application also provides a wind turbine, which comprises a general controller 200, a blade deicing device 300 and a blade state monitoring device for the wind turbine according to the above, the general controller 200 is in communication connection with the communication module 20 and the blade deicing device 300 respectively, and the general controller 200 is configured to control the blade deicing device 300 to start and stop according to the detection result of the detection assembly 10, and the specific structure of the blade state monitoring device refers to the above-mentioned embodiments, since the wind turbine adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0068] Specifically, as shown in Figure 1 and Figure 2 The communication controller 21 controls the wireless receiver 222 of the signal transceiver assembly 22 to transmit the blade temperature value and the ice thickness value to the general controller 200, the general controller 200 determines that the blade is in an icing state according to the blade temperature value and the ice thickness value, and controls the blade deicing device 300 to start to melt and remove ice on the blade in the case that the blade is determined to be in the icing state, realizing rapid response of the blade icing and improving the stability and reliability of the wind turbine in a low-temperature environment.

[0069] In the description of the application, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0070] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A blade condition monitoring device for wind turbine generators, characterized in that, The blade condition monitoring device includes: A detection component (10) is installed on the blade of a wind turbine and is used to detect the icing status of the blade; A communication module (20) is communicatively connected to the detection component (10) and is used to send and receive the detection results of the detection component (10); The first power supply component (30) includes a light source (31) and a photoelectric converter (32). The light source (31) is located at the root of the blade. The light source (31) is connected to the photoelectric converter (32) and is used to emit a light beam to the photoelectric converter (32). The photoelectric converter (32) is located in the inner cavity of the blade and is electrically connected to the detection component (10). The communication module (20) includes a communication controller (21) and a signal transceiver component (22). The communication controller (21) is electrically connected to the detection component (10) and the signal transceiver component (22), respectively. The signal transceiver component (22) is communicatively connected to the main controller (200) of the wind turbine generator. The communication controller (21) is configured to: The icing state of the blade is determined based on the detection result of the detection component (10), and the signal transceiver component (22) is controlled to send the detection result of the detection component (10) to the main controller (200); The detection component (10) includes a blade temperature sensor (11) and an ice thickness sensor (12). The blade temperature sensor (11) is located in the inner cavity of the blade and is used to detect the blade temperature value. The ice thickness sensor (12) is located on the outer surface of the blade and is used to detect the ice thickness value. The blade temperature sensor (11) is electrically connected to the communication controller (21) and the photoelectric converter (32) respectively. The ice thickness sensor (12) is electrically connected to the communication controller (21) and the photoelectric converter (32) respectively. The step of determining the icing state of the blade based on the detection result of the detection component (10) and controlling the signal transceiver component (22) to send the detection result of the detection component (10) to the main controller (200) includes: The icing state of the blade is determined based on the blade temperature value, and the signal transceiver component (22) is controlled to send the blade temperature value and the icing thickness value to the main controller (200). The step of determining the icing state of the blade based on the blade temperature value and controlling the signal transceiver component (22) to send the blade temperature value and the icing thickness value to the main controller (200) includes: If the blade temperature value is within a first preset temperature range, it is determined that the blade is in an un-iced state, and the signal transceiver component (22) is controlled to send the blade temperature value and the icing thickness value to the main controller (200) at a first preset frequency; If the blade temperature value is within the second preset temperature range, it is determined that the blade is in an icing state, and the signal transceiver component (22) is controlled to send the blade temperature value and the icing thickness value to the main controller (200) at the second preset frequency; Wherein, any value in the first preset temperature range is greater than any value in the second preset temperature range, and the first preset frequency is lower than the second preset frequency.

2. The blade condition monitoring device for wind turbines according to claim 1, characterized in that, The signal transceiver assembly (22) includes a wireless transmitter (221) and a wireless receiver (222). The wireless transmitter (221) is located in the inner cavity of the blade. The wireless transmitter (221) is electrically connected to the communication controller (21) and communicatively connected to the wireless receiver (222). The wireless receiver (222) is located at the root of the blade and communicatively connected to the main controller (200).

3. The blade condition monitoring device for wind turbines according to any one of claims 1 or 2, characterized in that, The blade condition monitoring device further includes a second power supply component (40), which includes a power supply battery (41) and a power distributor (42). The power supply battery (41) is electrically connected to the power distributor (42) and is used to supply power to the power distributor (42). The photoelectric converter (32) is electrically connected to the detection component (10) through the power distributor (42).

4. The blade condition monitoring device for wind turbines according to claim 3, characterized in that, The communication controller (21) is also configured to: If it is determined that the detection component (10) has insufficient power, the power supply battery (41) is controlled to supply power to the power distributor (42).

5. The blade condition monitoring device for wind turbines according to any one of claims 1 or 2, characterized in that, The first power supply component (30) also includes a connecting optical fiber (33), and the light source (31) is connected to the photoelectric converter (32) through the connecting optical fiber (33).

6. A wind turbine generator, characterized in that, The wind turbine includes a main controller (200), a blade de-icing device (300), and a blade condition monitoring device for a wind turbine according to any one of claims 1 to 5. The main controller (200) is communicatively connected to the communication module (20) and the blade de-icing device (300), respectively. The main controller (200) is configured to control the start and stop of the blade de-icing device (300) according to the detection result of the detection component (10).

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