Blade state monitoring device for wind driven generator and wind driven generator

Abstract

The invention 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 the 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 part and a photoelectric converter, the light source part is arranged at the root of the blade, the light source part is connected with the photoelectric converter and used for emitting light beams to the photoelectric converter, and the photoelectric converter is arranged in an inner cavity of the blade and electrically connected with the detection assembly. In the blade state monitoring device, the detection assembly is arranged on the blade, the accuracy of blade icing state detection is improved, the photoelectric converter receives light beams emitted by the light source piece and converts the light beams into electric energy to supply power to the detection assembly without being influenced by external environment changes, and long-term stable operation of the detection assembly is guaranteed; and the accuracy of blade icing state detection is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of blade monitoring, and in particular relates to a blade status monitoring device for a wind turbine and a wind turbine. Background Art

[0002] The blades of wind turbines are the main components for obtaining wind energy. When wind turbines are running in winter, blades are very prone to ice. In order to ensure that wind turbines can operate stably in low temperature environments, monitoring devices are usually used to detect the ice on the blades. Existing monitoring devices usually draw power from the cabin of the wind turbine or use solar energy for power supply. However, the cabin power supply requires the monitoring device to be installed on the top of the cabin. The distance between the monitoring device and the blades is relatively long, resulting in low accuracy in ice detection. Solar power supply is significantly affected by the weather and it is difficult to provide stable power to the monitoring device, which in turn affects the accuracy of ice detection. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a blade status monitoring device for a wind turbine and a wind turbine, aiming to solve the technical problem of low ice detection accuracy of existing monitoring devices.

[0004] In order to achieve the above object, the present invention provides a blade status monitoring device for a wind turbine, the blade status monitoring device comprising: A detection component is provided on the blades of the wind turbine and is used to detect the ice coating state of the blades; A communication module, which is connected to the detection component for communication and is used to send and receive detection results of the detection component; The first energy supply component includes a light source and a photoelectric converter. The light source is arranged at the root of the blade. The light source is connected to the photoelectric converter and is used to emit a light beam to the photoelectric converter. The photoelectric converter is arranged in the inner cavity of the blade and is electrically connected to the detection component.

[0005] In an embodiment of the present invention, the communication module includes a communication controller and a signal transceiver component, the communication controller is electrically connected to the detection component and the signal transceiver component respectively, the signal transceiver component is communicatively connected to the main controller of the wind turbine, and the communication controller is configured as follows: The ice-covered state of the blade is determined according to the detection result of the detection component, and the signal transceiver component is controlled to send the detection result of the detection component to the main controller.

[0006] In an embodiment of the present invention, the signal transceiver component includes 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 to the communication controller and is communicatively connected to the wireless receiver. The wireless receiver is arranged at the root of the blade and is communicatively connected to the main controller.

[0007] In an embodiment of the present invention, the detection component includes a blade temperature sensor and an ice thickness sensor. The blade temperature sensor is arranged in the inner cavity of the blade and is used to detect the blade temperature value. The ice thickness sensor is arranged on the outer surface of the blade and is used to detect the ice thickness value. The blade temperature sensor is electrically connected to the communication controller and the photoelectric converter, respectively, and the ice thickness sensor is electrically connected to the communication controller and the photoelectric converter, respectively.

[0008] In the embodiment of the present invention, determining the ice-covered state of the blade according to the detection result of the detection component, and controlling the signal transceiver component to send the detection result of the detection component to the main controller includes: The icing state of the blade is determined according to the blade temperature value, and the signal transceiver component is controlled to send the blade temperature value and the icing thickness value to the main controller.

[0009] In an embodiment of the present invention, determining the ice coating state of the blade according to the blade temperature value, and controlling the signal transceiver component to send the blade temperature value and the ice coating thickness value to the main controller includes: When the blade temperature value is within a first preset temperature range, determining that the blade is in an un-iced state, and controlling the signal transceiver component to send the blade temperature value and the ice thickness value to the main controller at a first preset frequency; When the blade temperature value is within a second preset temperature range, determining that the blade is in an ice-covered state, and controlling the signal transceiver component to send the blade temperature value and the ice thickness value to the main controller at a second preset frequency; Among them, 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.

[0010] In an embodiment of the present invention, the blade status monitoring device also includes a second energy supply component, which includes a power supply battery and a distributor. The power supply battery is electrically connected to the distributor and is used to supply power to the distributor. The photoelectric converter is electrically connected to the detection component through the distributor.

[0011] In an embodiment of the present invention, the communication controller is further configured as follows: When it is determined that the detection component is short of power, the power supply battery is controlled to supply power to the distributor.

[0012] In an embodiment of the present invention, the first energy supply component further includes a connecting optical fiber, and the light source is connected to the photoelectric converter via the connecting optical fiber.

[0013] In order to achieve the above-mentioned objectives, the present invention also provides a wind turbine, which includes a main controller, a blade de-icing device and a blade status monitoring device for a wind turbine as described above. The main controller is communicatively connected to the communication module and the blade de-icing device respectively, and the main controller is configured to control the start and stop of the blade de-icing device according to the detection results of the detection component.

[0014] Through the above technical solution, the blade status monitoring device for a wind turbine and the wind turbine provided by the embodiment of the present invention have the following beneficial effects: In the technical solution of the present invention, the detection component is arranged on the blade and can detect the icing state of the blade, the communication module receives the detection result of the detection component on the icing state of the blade and sends it to the main controller of the wind turbine to realize the monitoring of the icing state of the blade, and the first energy supply component is used to supply power to the detection component, the light source component of the first energy supply component is arranged at the root of the blade and connected to the photoelectric converter, and the photoelectric converter is arranged in the inner cavity of the blade and electrically connected to the detection component, the light source component is used to emit a light beam so that the light beam is transmitted to the photoelectric converter, the photoelectric converter converts the light energy of the light beam into electrical energy and supplies it to the detection component, so that the detection component can detect the icing state of the blade. In the blade state monitoring device of the present invention, the detection component is arranged on the blade to improve the accuracy of the detection of the icing state of the blade, the photoelectric converter receives the light beam emitted by the light source component and converts it into electrical energy to supply power to the detection component without being affected by changes in the external environment, so that the first energy supply component can stably supply power to the detection component, ensure the long-term stable operation of the detection component, and improve the accuracy of the detection of the icing state of the blade.

[0015] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings: Figure 1 is a structural block diagram of a blade status monitoring device according to an embodiment of the present invention; Figure 2 is a structural block diagram of a wind turbine according to an embodiment of the present invention; Figure 3 is a schematic diagram of a process for detecting the icing state of a blade by a blade state monitoring device according to an embodiment of the present invention; Figure 4 It is a schematic diagram of a flow chart of a blade status monitoring device detecting the icing status of a blade according to another embodiment of the present invention.

[0017] Description of Reference Numerals DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0019] The blade condition monitoring device for a wind turbine according to the present invention will be described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, the present invention provides a blade status monitoring device for a wind turbine, the blade status monitoring device includes a detection component 10, a communication module 20 and a first energy supply component 30, the detection component 10 is arranged on the blade of the wind turbine and is used to detect the icing state of the blade, the communication module 20 is communicatively connected with the detection component 10 and is used to send and receive the detection result of the detection component 10; the first energy supply component 30 includes a light source component 31 and a photoelectric converter 32, the light source component 31 is arranged at the root of the blade, the light source component 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 arranged in the inner cavity of the blade and is electrically connected to the detection component 10.

[0021] Specifically, the detection component 10 is arranged on the blade and can detect the ice coating state of the blade. The communication module 20 receives the detection result of the detection component 10 on the ice coating state of the blade and sends it to the main controller 200 of the wind turbine to realize the monitoring of the ice coating state of the blade. In addition, the first energy supply component 30 is used to supply power to the detection component 10. The light source component 31 of the first energy supply component 30 is arranged at the root of the blade and connected to the photoelectric converter 32, and the photoelectric converter 32 is arranged in the inner cavity of the blade and electrically connected to the detection component 10. The light source component 31 is used to emit a light beam so that the light beam is transmitted to the photoelectric converter 32. The electric converter 32 converts the light energy of the light beam into electrical energy and supplies it to the detection component 10, so that the detection component 10 can detect the icing state of the blade. In the blade state monitoring device of the embodiment of the present invention, the detection component 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 31 and converts it into electrical energy to supply power to the detection component 10 without being affected by changes in the external environment, so that the first energy supply component 30 can provide stable power to the detection component 10, ensuring the long-term stable operation of the detection component 10 and improving the accuracy of the detection of the icing state of the blade.

[0022] In an embodiment of the present invention, 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, and the communication controller 21 is configured to: determine the icing state of the blade according to the detection result of the detection component 10, and control the signal transceiver component 22 to send the detection result of the detection component 10 to the main controller 200.

[0023] Specifically, the detection component 10 is electrically connected to the communication controller 21, the communication controller 21 is electrically connected to the signal transceiver component 22, the signal transceiver component 22 is communicatively connected to the master controller 200, the detection component 10 is used to detect the ice-covered state of the blade, and the signal transceiver component 22 is used to send the detection result of the detection component 10 to the master controller 200 to realize the monitoring of the ice-covered state of the blade. Figure 3 As shown, Figure 3 The present invention is a schematic diagram of a process of detecting the ice-covered state of a blade by a blade state monitoring device according to an embodiment of the present invention, including: Step S10, obtaining the detection result of the detection component 10; Specifically, the communication controller 21 obtains the detection result of the detection component 10 on the ice-covered state of the blade.

[0024] Step S20, determining the ice-covered state of the blade according to the detection result of the detection component 10; Specifically, the communication controller 21 determines the ice-covered state of the blade according to the detection result of the detection component 10 .

[0025] Step S30, controlling the signal transceiver component 22 to send the detection result of the detection component 10 to the main controller 200 according to the ice coating state of the blade; Specifically, when the communication controller 21 determines the blade icing state, it controls the signal transceiver component 22 to send the detection result of the blade icing state to the main controller 200 to realize the detection of the blade icing state. The detection component 10 is arranged on the blade and can accurately detect the blade icing state. The communication controller 21 can receive the detection result of the blade icing state and send it to the main controller 200 through the signal transceiver component 22. The blade icing state detection has high accuracy and fast response time, which improves the operating stability of the wind turbine in a low temperature environment.

[0026] In an embodiment of the present invention, the signal transceiver component 22 includes a wireless transmitter 221 and a wireless receiver 222. The wireless transmitter 221 is arranged in the inner cavity of the blade. The wireless transmitter 221 is electrically connected to the communication controller 21 and is communicatively connected to the wireless receiver 222. The wireless receiver 222 is arranged at the root of the blade and is communicatively connected to the main controller 200.

[0027] like Figure 1 and Figure 2As shown, the wireless transmitter 221 is electrically connected to the communication controller 21 and is arranged in the inner cavity of the blade, so that the wireless transmitter 221 can quickly receive the blade icing state detection result sent by the communication controller 21, and the wireless receiver 222 is arranged at the root of the blade. The wireless transmitter 221 is wirelessly connected to the wireless receiver 222. When receiving the blade icing state detection result, the wireless transmitter 221 sends the detection result to the wireless receiver 222, so that the wireless receiver 222 can send the blade icing state detection result to the main controller 200, thereby realizing accurate detection of the blade icing state and improving the stability of the low-temperature operation of the wind turbine. The wireless transmitter 221 and the wireless receiver 222 do not need to be connected by wires to transmit the blade icing state detection result, thereby improving the anti-interference and lightning protection performance of the signal transceiver component 22, thereby improving the operation stability and safety of the blade state monitoring device, and the wireless receiver 222 can be connected to the main controller 200 through a cable, further accelerating the transmission speed of the detection result.

[0028] In an embodiment of the present invention, the detection component 10 includes a blade temperature sensor 11 and an ice thickness sensor 12. The blade temperature sensor 11 is arranged in the inner cavity of the blade and is used to detect the blade temperature value. The ice thickness sensor 12 is arranged 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, and the ice thickness sensor 12 is electrically connected to the communication controller 21 and the photoelectric converter 32 respectively.

[0029] like Figure 1 As shown, the blade temperature sensor 11 is arranged on the inner surface of the blade to accurately detect the blade temperature value, and the ice thickness sensor 12 is arranged on the outer surface of the blade to accurately detect the ice thickness value of the outer surface of the blade. The communication controller 21 can receive the blade temperature value and the ice thickness value and control the wireless transmitter 221 to transmit the blade temperature value and the ice thickness value to the wireless receiver 222, so that the wireless receiver 222 transmits the blade temperature value and the ice thickness value to the main controller 200, thereby realizing accurate monitoring of the blade temperature and the ice thickness of the blade surface, providing reliable data for blade deicing and ice melting, and improving the stability of low-temperature operation of the wind turbine. In addition, the photoelectric converter 32 is electrically connected to the blade temperature sensor 11 and the ice thickness sensor 12 respectively, so that the photoelectric converter 32 can supply the electrical energy converted from light energy to the blade temperature sensor 11 and the ice thickness sensor 12 respectively, ensuring the power supply of the blade temperature sensor 11 and the ice thickness sensor 12, so that the blade temperature sensor 11 and the ice thickness sensor 12 can operate stably for a long time, thereby improving the accuracy of blade ice detection.

[0030] In an embodiment of the present invention, determining the icing state of the blade according to 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: determining the icing state of the blade according to 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.

[0031] Specifically, the communication controller 21 obtains 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. When the icing state of the blade is determined, the communication controller 21 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, so that the wireless receiver 222 can send the blade temperature value and the ice thickness value to the main controller 200, so that the main controller 200 can control the blade de-icing equipment 300 to start or stop according to the blade temperature value and the ice thickness value, thereby achieving a rapid response to blade icing and improving the stability of low-temperature operation of the wind turbine. The main 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, further improving the operation safety.

[0032] Further, determining the ice coating state of the blade according to the blade temperature value, and controlling the signal transceiver component 22 to send the blade temperature value and the ice coating thickness value to the main controller 200 includes: When the blade temperature value is within the 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 ice thickness value to the main controller 200 at a first preset frequency; When the blade temperature value is within the second preset temperature range, it is determined that the blade is in an ice-covered state, and the signal transceiver component 22 is controlled to send the blade temperature value and the ice thickness value to the main controller 200 at a second preset frequency; Among them, 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.

[0033] like Figure 4 As shown, Figure 4 This is a schematic diagram of a process of detecting the icing state of a blade by a blade state monitoring device according to another embodiment of the present invention, including: Step S11, obtaining the blade temperature value detected by the blade temperature sensor 11; Specifically, the communication controller 21 obtains the detection result of the blade temperature value by the blade temperature sensor 11 .

[0034] Step S21, determining the icing state of the blade according to the blade temperature value; Specifically, the communication controller 21 determines that the blade is in an un-iced state when the blade temperature value is within a first preset temperature range, and determines that the blade is in an iced state when the blade temperature value is within a second preset temperature range, and any value within the first preset temperature range is greater than any value in the second preset temperature range, that is, when the blade temperature value drops from the first preset temperature range to the second preset temperature range, it can be determined that the blade temperature is low and surface ice and ice-covering occur.

[0035] Step S31, when it is determined that the blade is not in an ice-covered state, the signal transceiver component 22 is controlled to send the blade temperature value and the ice thickness value to the main controller 200 at a first preset frequency; Step S32, when it is determined that the blade is in an ice-covered state, the signal transceiver component 22 is controlled to send the blade temperature value and the ice thickness value to the main controller 200 at a second preset frequency; Specifically, the first preset frequency is lower than the second preset frequency. When the blade is in an un-iced state, the communication controller 21 controls the signal transceiver component 22 to transmit the blade temperature value and the ice thickness value at the first preset frequency, thereby reducing the energy consumption of the signal transceiver component 22 and extending the service life of the signal transceiver component 22. When the blade is in an iced state, the communication controller 21 controls the signal transceiver component 22 to transmit the blade temperature value and the ice thickness value at the second preset frequency, that is, the signal transceiver component 22 can transmit the blade temperature value and the ice thickness value at a high frequency when the blade is iced, so that the main controller 200 can timely start the blade de-icing equipment 300 according to the blade temperature value and the ice thickness value to melt and de-ice the blade, with a fast response speed, which greatly improves the operation stability and safety, and facilitates the main controller 200 to timely transmit the blade temperature value and the ice thickness value remotely to the central control room, so that the operation and maintenance personnel can monitor the blade ice state in real time and control the operation or stop of the wind turbine according to the blade ice state, thereby greatly improving the accuracy of blade ice state monitoring.

[0036] In an embodiment of the present invention, the blade state monitoring device also includes a second energy supply component 40, the second energy supply component 40 includes a power supply battery 41 and a distributor 42, the power supply battery 41 is electrically connected to the distributor 42 and is used to supply power to the distributor 42, and the photoelectric converter 32 is electrically connected to the detection component 10 through the distributor 42.

[0037] like Figure 1As shown, the power supply battery 41 is electrically connected to the distributor 42, and the distributor 42 is electrically connected to the blade temperature sensor 11, the ice thickness sensor 12 and the photoelectric converter 32 respectively. The photoelectric converter 32 and the power supply battery 41 can both provide electrical energy to the distributor 42, so that the distributor 42 supplies electrical energy to the blade temperature sensor 11 and the ice thickness sensor 12 respectively, thereby achieving accurate detection of the blade temperature and the ice thickness on the blade surface. In addition, the power supply battery 41 can provide electrical energy to the distributor 42 when the light source 31 lacks light energy or fails, thereby ensuring that the distributor 42 can provide sufficient electrical energy to the detection component 10, further improving the energy supply stability and reliability.

[0038] Further, the communication controller 21 is also configured to: when it is determined that the detection component 10 is insufficient in power, control the power supply battery 41 to supply power to the power distributor 42. Specifically, the communication controller 21 is respectively connected to the blade temperature sensor 11 and the ice thickness sensor 12 in communication, so that the communication controller 21 can judge whether the blade temperature sensor 11 and the ice thickness sensor 12 have sufficient power according to the response time, transmission frequency or alarm signal of the blade temperature sensor 11 and the ice thickness sensor 12. The communication controller 21 is also connected to the power supply battery 41 in communication, so that when it is determined that the blade temperature sensor 11 or the ice thickness sensor 12 is insufficient in power, the communication controller 21 can control the power supply battery 41 to supply power to the power distributor 42, thereby enabling the power distributor 42 to supply power to the blade temperature sensor 11 and the ice thickness sensor 12, thereby further improving the operation stability and reliability of the blade temperature sensor 11 and the ice thickness sensor 12.

[0039] In the embodiment of the present invention, the first energy supply component 30 further includes a connecting optical fiber 33, and the light source 31 is connected to the photoelectric converter 32 via the connecting optical fiber 33. Figure 1As shown, one end of the connecting optical fiber 33 is connected to the light source 31, and the other end of the connecting optical fiber 33 is connected to the photoelectric converter 32, so that the light beam emitted by the light source 31 can be transmitted to the photoelectric converter 32 through the connecting optical fiber 33, and the photoelectric converter 32 converts the light energy into electrical energy and supplies it to the blade temperature sensor 11 and the ice thickness sensor 12 through the distributor 42, thereby realizing accurate detection of the blade temperature and the ice thickness on the blade surface. The light source 31 is connected to the photoelectric converter 32 through the connecting optical fiber 33 to reduce energy consumption and improve light energy utilization. There is no need for electrical connection between the light source 31 and the photoelectric converter 32. The anti-interference performance and lightning protection performance of the blade status monitoring device are greatly improved. The blade status monitoring device is small in size and will not damage the aerodynamic structure of the blade during installation. It has the advantages of easy and quick installation. In addition, the light source component 31 can be set as a light source component 31 with a battery. The light source component 31 is powered by its own battery to emit a light beam. When the light source component 31 is exhausted, the battery can be replaced or charged. Alternatively, the light source component 31 can also be set to draw power from the cabin of the wind turbine. The light source component 31 is arranged at the root of the blade and is conveniently and quickly connected to the power supply equipment in the cabin, thereby improving the stability and reliability of the light beam emitted by the light source component 31.

[0040] In addition, the present invention also provides a wind turbine, which includes a main controller 200, a blade de-icing device 300 and a blade status monitoring device for a wind turbine as described above. 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, and the specific structure of the blade status monitoring device refers to the above-mentioned embodiment. Since the wind turbine adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0041] Specifically, Figure 1 and Figure 2 As shown, the communication controller 21 controls the wireless receiver 222 of the signal transceiver component 22 to transmit the blade temperature value and the ice thickness value to the main controller 200. The main controller 200 determines that the blade is in an ice-covered state according to the blade temperature value and the ice thickness value, and controls the blade de-icing device 300 to start to melt and de-ice the blade when it is determined that the blade is in an ice-covered state, thereby achieving a rapid response to blade icing and improving the stability and reliability of the wind turbine in a low temperature environment.

[0042] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A blade condition monitoring device for a wind turbine, characterized in that: The blade condition monitoring device comprises: A detection component (10) is arranged on a blade of a wind turbine and is used to detect an ice coating state of the blade; a communication module (20), the communication module (20) being communicatively connected to the detection component (10) and used for sending and receiving detection results of the detection component (10); The first energy supply component (30) comprises a light source component (31) and a photoelectric converter (32), wherein the light source component (31) is arranged at the root of the blade, the light source component (31) is connected to the photoelectric converter (32) and is used to emit a light beam to the photoelectric converter (32), and the photoelectric converter (32) is arranged in the inner cavity of the blade and is electrically connected to the detection component (10).

2. The blade condition monitoring device for a wind turbine according to claim 1, characterized in that: The communication module (20) comprises a communication controller (21) and a signal transceiver component (22), wherein the communication controller (21) is electrically connected to the detection component (10) and the signal transceiver component (22) respectively, and the signal transceiver component (22) is communicatively connected to a master controller (200) of the wind turbine generator, and the communication controller (21) is configured as follows: The ice coating state of the blade is determined according to 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).

3. The blade status monitoring device for a wind turbine according to claim 2, characterized in that: 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; the wireless transmitter (221) is electrically connected to the communication controller (21) and is in communication connection with the wireless receiver (222); the wireless receiver (222) is arranged at the root of the blade and is in communication connection with the master controller (200).

4. The blade status monitoring device for a wind turbine according to claim 2, characterized in that: The detection component (10) comprises a blade temperature sensor (11) and an ice thickness sensor (12); the blade temperature sensor (11) is arranged in the inner cavity of the blade and is used to detect the blade temperature value; the ice thickness sensor (12) is arranged 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; and the ice thickness sensor (12) is electrically connected to the communication controller (21) and the photoelectric converter (32) respectively.

5. The blade status monitoring device for a wind turbine according to claim 4, characterized in that: Determining the ice-covered state of the blade according to 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) comprises: The ice coating state of the blade is determined according to the blade temperature value, and the signal transceiver component (22) is controlled to send the blade temperature value and the ice coating thickness value to the main controller (200).

6. The blade status monitoring device for a wind turbine according to claim 5, characterized in that: Determining the ice coating state of the blade according to the blade temperature value, and controlling the signal transceiver component (22) to send the blade temperature value and the ice coating thickness value to the main controller (200) comprises: When the blade temperature value is within a first preset temperature range, determining that the blade is in an un-iced state, and controlling the signal transceiver component (22) to send the blade temperature value and the ice thickness value to the main controller (200) at a first preset frequency; When the blade temperature value is within a second preset temperature range, determining that the blade is in an ice-covered state, and controlling the signal transceiver component (22) to send the blade temperature value and the ice-covered thickness value to the main controller (200) at a 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.

7. The blade condition monitoring device for a wind turbine according to any one of claims 2 to 6, characterized in that: The blade condition monitoring device further comprises a second energy supply component (40), wherein the second energy supply component (40) comprises a power supply battery (41) and a power distributor (42), wherein the power supply battery (41) is electrically connected to the power distributor (42) and is used to supply power to the power distributor (42), and the photoelectric converter (32) is electrically connected to the detection component (10) via the power distributor (42).

8. The blade status monitoring device for a wind turbine according to claim 7, characterized in that: The communication controller (21) is further configured to: When it is determined that the detection component (10) is insufficient in power, the power supply battery (41) is controlled to supply power to the power distributor (42).

9. The blade condition monitoring device for a wind turbine according to any one of claims 1 to 6, characterized in that: The first energy supply component (30) further comprises a connecting optical fiber (33), and the light source component (31) is connected to the photoelectric converter (32) via the connecting optical fiber (33).

10. A wind turbine generator, characterized in that: The wind turbine comprises a master controller (200), a blade deicing device (300), and a blade status monitoring device for a wind turbine according to any one of claims 1 to 9, wherein the master controller (200) is communicatively connected to the communication module (20) and the blade deicing device (300), respectively, and the master controller (200) is configured to control the start and stop of the blade deicing device (300) according to the detection result of the detection component (10).

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