Fault identification method and device for variable pitch system of wind turbine generator, terminal and medium

Abstract

The invention provides a wind turbine generator variable pitch system fault identification method and device, a terminal and a medium. The method comprises the steps of obtaining first wind turbine generator monitoring data; determining the working state of the wind turbine generator according to the first wind turbine generator monitoring data; if the working state of the wind turbine generator set is the set shutdown state, the angle position of the blade is adjusted to the preset safety angle position, and a variable-pitch band-type brake device is started to lock the blade with the angle position adjusted to the preset safety angle position; acquiring second wind turbine generator monitoring data; and according to the second wind turbine generator set monitoring data, fault detection is carried out on the variable-pitch band-type brake device to obtain a fault detection result of the variable-pitch band-type brake device, and according to the wind turbine generator set monitoring data, fault detection can be automatically carried out on the variable-pitch band-type brake device after it is detected that the set is shut down to obtain a fault detection result. Workers are helped to find the fault state of the variable-pitch band-type brake device in time, and the accuracy of fault detection of the variable-pitch band-type brake device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power equipment, and in particular to a method, device, terminal and medium for identifying faults in a variable pitch system of a wind turbine. Background Art

[0002] During the operation of a wind turbine, the pitch brake device plays a vital role. It is responsible for locking the blades at a preset safe angle when the wind turbine is shut down to prevent accidental rotation of the blades due to factors such as wind, thereby ensuring the safety and stability of the unit.

[0003] However, traditional pitch brake device fault detection methods usually rely on regular maintenance and manual inspection, which makes it difficult to detect brake device failures in a timely manner and lacks accuracy. Summary of the invention

[0004] The embodiments of the present application provide a fault detection method, device, terminal and medium for a wind turbine pitch brake device, which can automatically perform fault detection on the pitch brake device after detecting that the unit is shut down based on the wind turbine monitoring data, and obtain a fault detection result, so as to help staff to promptly discover the fault status of the pitch brake device and improve the accuracy of fault detection on the pitch brake device.

[0005] A first aspect of an embodiment of the present application provides a fault detection method for a wind turbine pitch brake device, the method comprising:

[0006] Acquire monitoring data of the first wind turbine generator set;

[0007] Determining the working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set;

[0008] If the working state of the wind turbine set is the set shutdown state, the angle position of the blade is adjusted to a preset safety angle position, and the variable pitch brake device is started to lock the blade whose angle position is adjusted to the preset safety angle position;

[0009] Acquire monitoring data of a second wind turbine set, wherein the monitoring data of the second wind turbine set is updated monitoring data of the first wind turbine set after the variable pitch brake device locks the blades adjusted to a preset safety angle position;

[0010] According to the monitoring data of the second wind turbine generator set, a fault detection is performed on the pitch brake device to obtain a fault detection result of the pitch brake device.

[0011] Further, determining the working state of the wind turbine generator set according to the first wind turbine generator set monitoring data includes:

[0012] Extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data;

[0013] Comparing the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result;

[0014] The working state of the wind turbine generator set is determined according to the angle comparison result.

[0015] Further, the determining the working state of the wind turbine generator set according to the comparison result between the blade angle monitoring data at the first moment and the preset limit blade angle includes:

[0016] If the blade angle monitoring data at the first moment is less than or equal to the preset limit blade angle, it is determined that the working state of the wind turbine generator set is a normal power generation mode of the wind turbine generator set;

[0017] If the blade angle monitoring data at the first moment is greater than the preset limit blade angle, it is determined that the working state of the wind turbine generator set is an abnormal power generation mode of the wind turbine generator set.

[0018] Further, the performing fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device includes:

[0019] performing fault detection on the variable pitch motor according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch motor;

[0020] If the pitch motor fault detection result is no fault, the pitch motor is used to output the rated torque to control the blades to enter the retracted working state;

[0021] Acquire monitoring data of the second wind turbine after the blades enter the retracted working state;

[0022] Extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine set after the blade enters the retracted working state;

[0023] Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1;

[0024] A fault detection result of a variable pitch brake device is determined according to the blade angle change value.

[0025] Further, determining the fault detection result of the variable pitch brake device according to the blade angle change value includes:

[0026] If the blade angle change value is greater than or equal to 0.5°, the fault detection result of the variable pitch brake device is faulty;

[0027] If the blade angle change value is less than 0.5°, the fault detection result of the variable pitch brake device is normal.

[0028] In this example, the monitoring data of the first wind turbine is first obtained. After confirming that the working state of the wind turbine is the shutdown state, the angle position of the blade is adjusted to the preset safety angle position, and the pitch brake device is started to lock the angle of the blade. Then, the monitoring data of the second wind turbine is obtained. On the premise that the pitch brake device locks the blade angle, the pitch brake device is fault-detected according to the monitoring data of the second wind turbine. According to the monitoring data of the wind turbine, the pitch brake device can be automatically fault-detected after detecting that the unit is shut down, and the fault detection result is obtained, which helps the staff to promptly discover the fault state of the pitch brake device and improve the accuracy of fault detection of the pitch brake device.

[0029] A second aspect of an embodiment of the present application provides a fault detection device for a wind turbine pitch brake device, the device comprising:

[0030] A first acquisition unit, used to acquire monitoring data of a first wind turbine generator set;

[0031] A determination unit, configured to determine a working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set;

[0032] The processing unit is used to adjust the angle position of the blade to a preset safety angle position if the working state of the wind turbine set is the unit shutdown state, and start the variable pitch brake device to lock the blade adjusted to the preset safety angle position;

[0033] A second acquisition unit, used to acquire monitoring data of a second wind turbine generator set;

[0034] The detection unit is used to perform fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device.

[0035] Further, in the aspect of determining the working state of the wind turbine generator set according to the first wind turbine generator set monitoring data, the determining unit is used to:

[0036] Extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data;

[0037] Comparing the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result;

[0038] The working state of the wind turbine generator set is determined according to the angle comparison result.

[0039] Further, in the aspect of determining the working state of the wind turbine generator set according to the comparison result between the blade angle monitoring data at the first moment and the preset limit blade angle, the determination unit is used to:

[0040] If the blade angle monitoring data at the first moment is less than or equal to the preset limit blade angle, it is determined that the working state of the wind turbine generator set is a normal power generation mode of the wind turbine generator set;

[0041] If the blade angle monitoring data at the first moment is greater than the preset limit blade angle, it is determined that the working state of the wind turbine generator set is an abnormal power generation mode of the wind turbine generator set.

[0042] Further, in the aspect of performing fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device, the detection unit is used to:

[0043] performing fault detection on the variable pitch motor according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch motor;

[0044] If the pitch motor fault detection result is no fault, the pitch motor is used to output the rated torque to control the blades to enter the retracted working state;

[0045] Acquire monitoring data of the second wind turbine after the blades enter the retracted working state;

[0046] Extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine set after the blade enters the retracted working state;

[0047] Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1;

[0048] A fault detection result of a variable pitch brake device is determined according to the blade angle change value.

[0049] Further, in the aspect of determining the fault detection result of the variable pitch brake device according to the blade angle change value, the detection unit is used to:

[0050] If the blade angle change value is greater than or equal to 0.5°, the fault detection result of the variable pitch brake device is faulty;

[0051] If the blade angle change value is less than 0.5°, the fault detection result of the variable pitch brake device is normal.

[0052] A third aspect of an embodiment of the present application provides a terminal, comprising a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute the step instructions described in the fault detection method of the variable pitch brake device of a wind turbine group in the first aspect of the embodiment of the present application.

[0053] The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute part or all of the steps described in the fault detection method for the variable pitch brake device of a wind turbine group in the first aspect of the embodiments of the present application.

[0054] A fifth aspect of the embodiments of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the fault detection method for a wind turbine pitch brake device in the first aspect of the embodiments of the present application. The computer program product may be a software installation package. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic diagram of the overall process of a fault detection method for a wind turbine pitch brake device is provided for an embodiment of the present application;

[0057] Figure 2 A schematic diagram of a specific detection process of a pitch brake device in a fault detection method of a wind turbine pitch brake device is provided for an embodiment of the present application;

[0058] Figure 3 A structural schematic diagram of a fault detection device for a wind turbine pitch brake device is provided for an embodiment of the present application;

[0059] Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0060] Reference numerals:

[0061] First acquisition unit-1, determination unit-2, processing unit-3, second acquisition unit-4, detection unit-5. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0064] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0065] In order to better understand the fault detection method of the wind turbine pitch brake device provided by the embodiment of the present application, the following first briefly introduces the scenario of the application of the fault detection method of the wind turbine pitch brake device. The traditional wind turbine pitch brake device fault detection method generally shuts down the equipment in the production workshop on a preset schedule (such as shutting down once every two weeks), and then performs routine inspections on all equipment and devices in turn to eliminate the faults in these equipment and devices. However, for a frequently used device such as a pitch brake device, although it has strong reliability, it is not ruled out that the pitch brake device may fail in the daily production process due to the long use time of the pitch brake device or the high working environment temperature. Therefore, the fault of the pitch brake device may have occurred and has not been discovered in time before the daily regular maintenance and manual inspection, which may cause the blades to spin and damage other equipment in the wind turbine hub. Production accidents occur.

[0066] The wind turbine pitch system fault identification method is applied to the fault detection device of the wind turbine pitch brake device. Figure 1 The figure shows a schematic diagram of the overall process of a fault detection method for a wind turbine pitch brake device. Figure 1 As shown, including:

[0067] S1. Acquire first wind turbine monitoring data, where the first wind turbine monitoring data includes real-time wind turbine monitoring data. In this example, the real-time wind turbine monitoring data is real-time blade angle monitoring data.

[0068] S2. Determine the working state of the wind turbine according to the first wind turbine monitoring data. In this example, the specific steps of determining the working state of the wind turbine include:

[0069] S201, extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data. The extracted blade angle monitoring data at a first moment is real-time blade angle monitoring data at a first moment, and is used to determine the working state of the wind turbine at the first moment.

[0070] S202, compare the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result. It should be noted that the preset working limit blade angle is a threshold value for judging whether the wind turbine is in a normal power generation state in the wind turbine. In this example, by comparing the blade angle monitoring data at the first moment with the preset working limit blade angle, the specific current power generation state of the wind turbine can be obtained.

[0071] S203, determining the working state of the wind turbine according to the angle comparison result, in this example, includes:

[0072] S203A: If the blade angle monitoring data at the first moment is less than or equal to the preset limit blade angle, determine that the working state of the wind turbine set is the normal power generation mode of the set. When it is determined that the working state of the wind turbine set is the normal power generation mode of the set, it means that the various equipment devices of the wind turbine set are normal, that is, the variable pitch brake device is normal, and step S3 is not performed, and the process ends at this step.

[0073] S203B, if the blade angle monitoring data at the first moment is greater than the preset limit blade angle, determine that the working state of the wind turbine set is an abnormal power generation mode of the set. Determining that the working state of the wind turbine set is an abnormal power generation mode of the set indicates that there is an abnormality in the power generation mode of the wind turbine set, and there may be a fault in the device or equipment, therefore, proceed to step S3 to continue identifying the device or equipment in the wind turbine set and find the device or equipment with a fault.

[0074] S3. If the working state of the wind turbine generator set is the shutdown state, the angle position of the blade is adjusted to a preset safety angle position, and the variable pitch brake device is started to lock the blade whose angle position is adjusted to the preset safety angle position.

[0075] In this example, the step of starting the pitch brake device to lock the blades at a safe angle position is a key step in subsequently verifying whether there is a fault in the pitch brake device. That is, if the pitch brake device is normal and has no faults, the blades can be locked so that they cannot move. If there is a fault, the pitch brake device cannot lock the blades.

[0076] In addition, in this example, once it is confirmed that the working state of the wind turbine is the shutdown state, the angle position of the blades will be controlled to be adjusted to the preset safety angle position, and the pitch brake device will be started to lock the blades whose angle position is adjusted to the preset safety angle position, and the subsequent detection step of the pitch brake device will be started. That is, as long as the unit is shut down, the pitch brake device will automatically perform self-inspection immediately, without waiting for regular maintenance or manual inspection, thereby improving the timeliness of detecting faults in the pitch brake device.

[0077] S4. Acquire monitoring data of a second wind turbine set, wherein the monitoring data of the second wind turbine set is updated monitoring data of the first wind turbine set after the variable pitch brake device locks the blades adjusted to a preset safety angle position.

[0078] S5. Perform fault detection on the variable pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch brake device. Specifically, the method includes:

[0079] S501. Perform fault detection on the variable pitch motor according to the monitoring data of the second wind turbine group to obtain the fault detection result of the variable pitch motor. In this example, the variable pitch motor is detected for coding faults to exclude the situation where the variable pitch motor fails and the blades cannot be locked. If a coding fault is detected in the variable pitch motor, it is considered that the variable pitch motor has a fault and the step is stopped. If no coding fault is detected in the variable pitch motor, this fault is excluded and step S502 is performed.

[0080] S502. If the fault detection result of the variable pitch motor is no fault, the variable pitch motor is used to output the rated torque to control the blades to enter the retracted working state. That is, the pre-detection of the variable pitch brake device is first performed, and after the factors of the pre-detection are eliminated, the main body fault detection of the variable pitch brake device is performed. In this example, the variable pitch motor is used to output the rated torque to make the blades enter the retracted working state, that is, to give the blades a tendency in the retracted direction, so as to verify whether the variable pitch brake device can lock the blades.

[0081] S503, acquiring the monitoring data of the second wind turbine set after the blades enter the retracted working state, so as to obtain the latest real-time monitoring data of the wind turbine set, and continue the subsequent detection of the variable pitch brake device.

[0082] S504: extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine generator set after the blades enter the retracted working state. Time k is data at any time in the monitoring data of the second wind turbine generator set.

[0083] S505: Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1. Specifically, the blade angle value at time k and the blade angle value at time k+1 are added and divided by 2 to obtain the blade angle change value.

[0084] S506: Determine a fault detection result of a variable pitch brake device according to the blade angle change value. Specifically, the method includes:

[0085] S506A, if the blade angle change value is greater than or equal to 0.5°, the pitch brake device fault detection result is faulty. In this example, when the blade angle change value is greater than or equal to 0.5°, it is considered that the blade angle change value is outside the preset range, and it is confirmed that the pitch brake device has not locked the blade angle, that is, it is considered that the pitch brake device has a fault, and the information that the pitch brake device has a fault is uploaded, so that the staff can obtain the fault information in time and eliminate the fault of the pitch brake device in time.

[0086] S506B, if the blade angle change value is less than 0.5°, the pitch brake device fault detection result is normal. When the blade angle change value is less than 0.5°, it is considered that the blade angle change value is within the preset range. When the pitch brake device does not fail, the blade angle change value is generally 0, thereby eliminating the possibility of a fault in the pitch brake device, and the pitch brake device can lock the blade.

[0087] In this example, the monitoring data of the first wind turbine is first obtained. After confirming that the working state of the wind turbine is the shutdown state, the angle position of the blade is adjusted to the preset safety angle position, and the pitch brake device is started to lock the angle of the blade. Then, the monitoring data of the second wind turbine is obtained. On the premise that the pitch brake device locks the blade angle, the pitch brake device is fault-detected according to the monitoring data of the second wind turbine. According to the monitoring data of the wind turbine, the pitch brake device can be automatically fault-detected after detecting that the unit is shut down, and the fault detection result is obtained, which helps the staff to promptly discover the fault state of the pitch brake device and improve the accuracy of fault detection of the pitch brake device.

[0088] In line with the above, see Figure 3 , Figure 3 The present invention provides a schematic diagram of a fault detection device for a wind turbine pitch brake device. Figure 3 As shown, the device comprises:

[0089] A first acquisition unit 1, used to acquire monitoring data of a first wind turbine generator set;

[0090] A determination unit 2, configured to determine a working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set;

[0091] Processing unit 3 is used for adjusting the angle position of the blade to a preset safety angle position if the working state of the wind turbine set is the set shutdown state, and starting the variable pitch brake device to lock the blade adjusted to the preset safety angle position;

[0092] A second acquisition unit 4, used to acquire monitoring data of a second wind turbine generator set;

[0093] The detection unit 5 is used to perform fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device.

[0094] In this example, by first obtaining the monitoring data of the first wind turbine set and confirming that the working state of the wind turbine set is the shutdown state, the angle position of the blade is adjusted to the preset safety angle position, and the pitch brake device is started to lock the angle of the blade. Then, the monitoring data of the second wind turbine set is obtained. On the premise that the pitch brake device locks the blade angle, the pitch brake device is fault-detected according to the monitoring data of the second wind turbine set. According to the monitoring data of the wind turbine set, the pitch brake device can be automatically fault-detected after detecting that the unit is shut down, and a fault detection result can be obtained, which helps the staff to promptly discover the fault state of the pitch brake device and improves the accuracy of fault detection of the pitch brake device.

[0095] In a possible implementation, in the aspect of determining the working state of the wind turbine generator set according to the first wind turbine generator set monitoring data, the determining unit 2 is configured to:

[0096] Extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data;

[0097] Comparing the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result;

[0098] The working state of the wind turbine generator set is determined according to the angle comparison result.

[0099] In a possible implementation, in determining the working state of the wind turbine generator set according to the comparison result between the blade angle monitoring data at the first moment and the preset limit blade angle, the determination unit 2 is used to:

[0100] If the blade angle monitoring data at the first moment is less than or equal to the preset limit blade angle, it is determined that the working state of the wind turbine generator set is a normal power generation mode of the wind turbine generator set;

[0101] If the blade angle monitoring data at the first moment is greater than the preset limit blade angle, it is determined that the working state of the wind turbine generator set is an abnormal power generation mode of the wind turbine generator set.

[0102] In a possible implementation, in the aspect of performing fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device, the detection unit 5 is used to:

[0103] performing fault detection on the variable pitch motor according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch motor;

[0104] If the pitch motor fault detection result is no fault, the pitch motor is used to output the rated torque to control the blades to enter the retracted working state;

[0105] Acquire monitoring data of the second wind turbine after the blades enter the retracted working state;

[0106] Extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine set after the blade enters the retracted working state;

[0107] Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1;

[0108] A fault detection result of a variable pitch brake device is determined according to the blade angle change value.

[0109] In a possible implementation, in the aspect of determining the fault detection result of the variable pitch brake device according to the blade angle change value, the detection unit is used to:

[0110] If the blade angle change value is greater than or equal to 0.5°, the fault detection result of the variable pitch brake device is faulty;

[0111] If the blade angle change value is less than 0.5°, the fault detection result of the variable pitch brake device is normal.

[0112] For the above embodiments, please refer to Figure 4 , Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0113] Acquire monitoring data of the first wind turbine generator set;

[0114] Determining the working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set;

[0115] If the working state of the wind turbine set is the set shutdown state, the angle position of the blade is adjusted to a preset safety angle position, and the variable pitch brake device is started to lock the blade whose angle position is adjusted to the preset safety angle position;

[0116] Acquire monitoring data of a second wind turbine set, wherein the monitoring data of the second wind turbine set is updated monitoring data of the first wind turbine set after the variable pitch brake device locks the blades adjusted to a preset safety angle position;

[0117] According to the monitoring data of the second wind turbine generator set, a fault detection is performed on the pitch brake device to obtain a fault detection result of the pitch brake device.

[0118] In this example, by first obtaining the monitoring data of the first wind turbine set and confirming that the working state of the wind turbine set is the shutdown state, the angle position of the blade is adjusted to the preset safety angle position, and the pitch brake device is started to lock the angle of the blade. Then, the monitoring data of the second wind turbine set is obtained. On the premise that the pitch brake device locks the blade angle, the pitch brake device is fault-detected according to the monitoring data of the second wind turbine set. According to the monitoring data of the wind turbine set, the pitch brake device can be automatically fault-detected after detecting that the unit is shut down, and a fault detection result can be obtained, which helps the staff to promptly discover the fault state of the pitch brake device and improves the accuracy of fault detection of the pitch brake device.

[0119] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0120] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0121] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any wind turbine pitch system fault identification method recorded in the above method embodiments.

[0122] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any wind turbine pitch system fault identification method recorded in the above method embodiments.

[0123] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0124] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0126] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0127] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0128] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0129] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0130] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fault detection method for a wind turbine variable pitch brake device, characterized in that: include: Acquire monitoring data of the first wind turbine generator set; Determining the working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set; If the working state of the wind turbine set is the set shutdown state, the angle position of the blade is adjusted to a preset safety angle position, and the variable pitch brake device is started to lock the blade whose angle position is adjusted to the preset safety angle position; Acquire monitoring data of a second wind turbine set, wherein the monitoring data of the second wind turbine set is updated monitoring data of the first wind turbine set after the variable pitch brake device locks the blades adjusted to a preset safety angle position; According to the monitoring data of the second wind turbine generator set, a fault detection is performed on the pitch brake device to obtain a fault detection result of the pitch brake device.

2. The fault detection method for a wind turbine pitch brake device according to claim 1, characterized in that: The step of determining the working state of the wind turbine generator set according to the first wind turbine generator set monitoring data includes: Extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data; Comparing the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result; The working state of the wind turbine generator set is determined according to the angle comparison result.

3. The fault detection method for a wind turbine variable pitch brake device according to claim 2, characterized in that: The determining the working state of the wind turbine generator set according to the comparison result between the blade angle monitoring data at the first moment and the preset limit blade angle includes: If the blade angle monitoring data at the first moment is less than or equal to the preset limit blade angle, it is determined that the working state of the wind turbine generator set is a normal power generation mode of the wind turbine generator set; If the blade angle monitoring data at the first moment is greater than the preset limit blade angle, it is determined that the working state of the wind turbine generator set is an abnormal power generation mode of the wind turbine generator set.

4. The fault detection method for a wind turbine pitch brake device according to claim 1, characterized in that: The method of performing fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device includes: performing fault detection on the variable pitch motor according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch motor; If the pitch motor fault detection result is no fault, the pitch motor is used to output the rated torque to control the blades to enter the retracted working state; Acquire monitoring data of the second wind turbine after the blades enter the retracted working state; Extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine set after the blade enters the retracted working state; Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1; A fault detection result of a variable pitch brake device is determined according to the blade angle change value.

5. The fault detection method for a wind turbine pitch brake device according to claim 4, characterized in that: Determining the fault detection result of the variable pitch brake device according to the blade angle change value includes: If the blade angle change value is greater than or equal to 0.5°, the fault detection result of the variable pitch brake device is faulty; If the blade angle change value is less than 0.5°, the fault detection result of the variable pitch brake device is normal.

6. A fault detection device for a wind turbine variable pitch brake device, characterized in that: include: A first acquisition unit, used to acquire monitoring data of a first wind turbine generator set; A determination unit, configured to determine a working state of the wind turbine generator set according to the monitoring data of the first wind turbine generator set; The processing unit is used to adjust the angle position of the blade to a preset safety angle position if the working state of the wind turbine set is the unit shutdown state, and start the variable pitch brake device to lock the blade adjusted to the preset safety angle position; A second acquisition unit, used to acquire monitoring data of a second wind turbine generator set; The detection unit is used to perform fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device.

7. The fault detection device for the wind turbine variable pitch brake device according to claim 6, characterized in that: In the aspect of determining the working state of the wind turbine generator set according to the first wind turbine generator set monitoring data, the determining unit is used to: Extracting blade angle monitoring data at a first moment from the first wind turbine monitoring data; Comparing the blade angle monitoring data at the first moment with the preset working limit blade angle to obtain an angle comparison result; The working state of the wind turbine generator set is determined according to the angle comparison result.

8. The fault detection device for a wind turbine pitch brake device according to claim 6, characterized in that: In the aspect of performing fault detection on the pitch brake device according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the pitch brake device, the detection unit is used to: performing fault detection on the variable pitch motor according to the monitoring data of the second wind turbine generator set to obtain a fault detection result of the variable pitch motor; If the pitch motor fault detection result is no fault, the pitch motor is used to output the rated torque to control the blades to enter the retracted working state; Acquire monitoring data of the second wind turbine after the blades enter the retracted working state; Extracting the blade angle value at time k and the blade angle value at time k+1 from the monitoring data of the second wind turbine set after the blade enters the retracted working state; Calculate the blade angle change value according to the blade angle value at time k and the blade angle value at time k+1; A fault detection result of a variable pitch brake device is determined according to the blade angle change value.

9. A terminal, characterized in that: It includes a processor, an input device, an output device and a memory, which are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the method described in the fault detection method of the variable pitch brake device of a wind turbine set according to any one of claims 1-5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which includes program instructions. When the program instructions are executed by a processor, the processor executes the method described in the fault detection method of a wind turbine pitch brake device according to any one of claims 1 to 5.

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