Variable pitch cog belt detection method, device, equipment and medium

Abstract

The invention discloses a variable pitch cog belt detection method, device and equipment and a medium, and relates to the technical field of wind power generation. According to the embodiment of the invention, under the condition that the wind generating set is put into production, the target active power of the wind generating set at multiple time points in a first period and the rotating speed of at least one variable-pitch motor corresponding to the target active power are obtained; and detecting whether the variable pitch cog belt is abnormal or not according to the rotating speed of each variable pitch motor. The performance of the variable pitch cog belt can be detected in real time after the wind generating set is put into production, operation and maintenance personnel can find abnormity of the variable pitch cog belt as soon as possible, failure of a variable pitch system caused by breakage of the cog belt is avoided, and meanwhile, due to the fact that the method is carried out after the wind generating set is put into production, the working efficiency of the variable pitch system is improved. Therefore, the detection result can truly reflect the performance of the variable pitch cog belt in the variable pitch system, and the accuracy is high.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a detection method, device, equipment and medium for a variable pitch toothed belt. Background Art

[0002] The pitch toothed belt is an important component used in the pitch system of a wind turbine. The pitch motor drives the blades to rotate through the pitch toothed belt to achieve the pitch effect.

[0003] Due to the complex working environment of wind turbines and the frequent pitch changes, if the pitch toothed belt is offset or worn for a long time without being checked, it will cause the pitch toothed belt to break, which will cause the wind turbine to fail to retract the blades normally, posing a hidden danger to the safety of the wind turbine. Therefore, it is of great significance to detect the pitch toothed belt.

[0004] The relevant technology mainly tests the variable pitch toothed belt through experiments before the wind turbine is put into operation. This not only has poor timeliness, but also cannot truly reflect the performance of the variable pitch toothed belt in the wind turbine variable pitch system. Summary of the invention

[0005] The embodiments of the present application provide a method, device, equipment and medium for detecting a pitch toothed belt, which can perform real-time detection of the pitch toothed belt after the wind turbine is put into operation, and can truly reflect the performance of the pitch toothed belt in the wind turbine pitch system.

[0006] In a first aspect, an embodiment of the present application provides a method for detecting a pitch toothed belt, comprising:

[0007] When the wind turbine generator set is in operation, obtaining target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power;

[0008] According to the rotation speed of each pitch motor, check whether the pitch toothed belt is abnormal.

[0009] In a second aspect, an embodiment of the present application provides a detection device for a variable pitch toothed belt, comprising:

[0010] An acquisition module, used for acquiring, when the wind turbine generator set is in operation, a target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power;

[0011] The detection module is used to detect whether the pitch toothed belt is abnormal according to the rotation speed of each pitch motor.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0013] processor;

[0014] a memory for storing computer program instructions;

[0015] When the computer program instructions are executed by the processor, the method according to the first aspect is implemented.

[0016] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the method described in the first aspect is implemented.

[0017] In the embodiment of the present application, when the wind turbine generator set is in operation, the target active power of the wind turbine generator at multiple time points in the first cycle and the speed of at least one variable pitch motor corresponding to the target active power are obtained; according to the speed of each variable pitch motor, whether the variable pitch toothed belt is abnormal is detected. That is, the embodiment of the present application can detect the performance of the variable pitch toothed belt in real time after the wind turbine generator set is put into operation, which is convenient for the operation and maintenance personnel to find the abnormality of the variable pitch toothed belt as early as possible, and avoid the failure of the variable pitch system caused by the toothed belt breakage. At the same time, since the embodiment of the present application is carried out after the wind turbine generator set is put into operation, the detection result can truly reflect the performance of the variable pitch toothed belt in the variable pitch system with high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 A flow chart of a method for detecting a variable pitch toothed belt provided in an embodiment of the present application;

[0020] Figure 2 A flow chart of another method for detecting a variable pitch toothed belt provided in an embodiment of the present application;

[0021] Figure 3 A flow chart of another method for detecting a variable pitch toothed belt provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a performance change curve of a variable pitch toothed belt provided in an embodiment of the present application;

[0023] Figure 5 A structural diagram of a detection device for a variable pitch toothed belt provided in an embodiment of the present application;

[0024] Figure 6 A structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0026] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the guyed tower and wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0027] The related technology mainly relies on experimental methods when testing the variable pitch toothed belt, that is, the variable pitch toothed belt is usually tested through experiments before the wind turbine is put into operation. This is not only time-sensitive, but also unable to truly reflect the performance of the variable pitch toothed belt in the wind turbine pitch system.

[0028] To this end, the embodiments of the present application provide a method, device, equipment and medium for detecting a pitch toothed belt, which can perform real-time detection of the pitch toothed belt after the wind turbine is put into operation, and can truly reflect the performance of the pitch toothed belt in the wind turbine pitch system.

[0029] The following describes in detail the detection method, device, equipment and medium of the variable pitch toothed belt provided in the embodiments of the present application through specific embodiments.

[0030] Figure 1 A flow chart of a method for detecting a pitch toothed belt provided in an embodiment of the present application, which method can be applied to electronic equipment, which can be a device with data processing function, such as a server, a computer, etc. The method is applicable to all wind turbines including a pitch toothed belt.

[0031] like Figure 1 As shown, the detection method of the variable pitch toothed belt may include the following steps:

[0032] S110: When the wind turbine generator set is in operation, obtain target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power.

[0033] S120. Detect whether the pitch-changing toothed belt is abnormal according to the rotation speed of each pitch-changing motor.

[0034] In the embodiment of the present application, when the wind turbine generator set is in operation, the target active power of the wind turbine generator at multiple time points in the first cycle and the speed of at least one variable pitch motor corresponding to the target active power are obtained; according to the speed of each variable pitch motor, whether the variable pitch toothed belt is abnormal is detected. That is, the embodiment of the present application can detect the performance of the variable pitch toothed belt in real time after the wind turbine generator set is put into operation, which is convenient for the operation and maintenance personnel to find the abnormality of the variable pitch toothed belt as early as possible, and avoid the failure of the variable pitch system caused by the toothed belt breakage. At the same time, since the embodiment of the present application is carried out after the wind turbine generator set is put into operation, the detection result can truly reflect the performance of the variable pitch toothed belt in the variable pitch system with high accuracy.

[0035] The above steps are described in detail below:

[0036] In S110, the embodiment of the present application detects whether the variable pitch toothed belt is abnormal when the unit is in production, and the detection result obtained can truly reflect the performance of the variable pitch toothed belt in the unit.

[0037] The variable pitch toothed belt is a transmission belt with a toothed structure on the working surface, which can be used to transmit power by meshing between the belt teeth and the gear teeth. In a wind turbine, each blade is fixed to the hub of the wind turbine through a variable pitch bearing, and the variable pitch motor installed in the hub drives the blade to rotate through the variable pitch toothed belt to achieve the variable pitch effect.

[0038] The first cycle may be a time period including multiple time points. In order to detect abnormalities of the pitch toothed belt in a timely manner, the first cycle may be set to be relatively short. For example, the first cycle may be one day or several hours.

[0039] The target active power may be the active power output by the wind turbine set. To avoid invalid detection caused by the shutdown of the wind turbine set for maintenance, the target active power may be the active power output by the wind turbine set that is greater than 0. That is, the embodiment of the present application detects the pitch toothed belt during the operation of the wind turbine set.

[0040] Taking the case where a wind turbine has three blades, the variable pitch motors include three accordingly, and the variable pitch motors in the embodiment of the present application may include one or more variable pitch motors. That is, when the active power output by the wind turbine is not 0, the rotation speed of at least one variable pitch motor may be obtained.

[0041] In some embodiments, when measuring points for the rotation speed of the pitch motors are set, the rotation speed of each pitch motor can be acquired through a rotation speed sensor, wherein each rotation speed sensor is respectively arranged on a corresponding pitch motor.

[0042] In some embodiments, when no measurement point for the speed of the pitch motor is set, the pitch angle and pitch time of the blade corresponding to each pitch motor can be obtained, and the ratio of the pitch angle to the pitch time can be determined as the speed of the corresponding pitch motor.

[0043] For example, the active power of a wind turbine and the speed of a pitch motor can be obtained from a Supervisory Control And Data Acquisition (SCADA) system, which is a computer-based distributed control system (DCS) and power automation monitoring system. In the field of wind power, the data of a wind turbine will be transmitted to the SCADA system so that the wind turbine can be monitored through the SCADA system.

[0044] The embodiment of the present application can obtain the target active power of the wind turbine at multiple time points in the first cycle and the speed of at least one variable pitch motor corresponding to the target active power from the SCADA system without adding additional data acquisition devices, thereby reducing costs.

[0045] In S120, the abnormality of the pitch toothed belt may include loosening of the pitch toothed belt due to wear, offset, or the like.

[0046] It is understandable that the pitch system works consistently, that is, when the wind turbine is in normal operation, the start and stop states of the three pitch motors are synchronized. If the pitch motor becomes loose due to wear, offset, etc., there may be the following two manifestations: 1. When the two normal blades stop pitching, the abnormal blade cannot stop in time; 2. In the non-pitch state, the abnormal blade will be affected by the wind and transmit the kinetic energy to the pitch system sensor through the loose pitch toothed belt. Both situations will affect the speed of the pitch motor.

[0047] Therefore, based on the rotation speed of the pitch motor, it is possible to detect whether the pitch toothed belt is abnormal. That is, the embodiment of the present application can detect the pitch toothed belt in real time based on the rotation speed of the pitch motor, and timely discover the abnormality of the pitch toothed belt, thereby avoiding failure of the pitch system due to the breakage of the pitch toothed belt.

[0048] For example, Figure 2 As shown, the detection method of the variable pitch toothed belt may include the following steps:

[0049] S210: When the wind turbine generator set is in operation, obtain target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power.

[0050] S220. Determine a performance index value of the pitch-changing toothed belt according to the rotation speed of each pitch-changing motor.

[0051] S230. Detect whether the variable pitch toothed belt is abnormal according to the performance index value.

[0052] The process of S210 may refer to the above embodiment, and the other steps are described in detail below, as shown below:

[0053] In S220, the performance index value of the variable pitch toothed belt is used to characterize the health of the variable pitch toothed belt. For example, the larger the performance index value, the healthier the variable pitch toothed belt is, that is, the smaller the possibility of abnormality is, and the smaller the performance index value, the smaller the health of the variable pitch toothed belt is, that is, the greater the possibility of abnormality is. That is, the embodiment of the present application quantifies the health of the variable pitch toothed belt, which is more conducive to the maintenance work of the operation and maintenance personnel.

[0054] Exemplarily, the speed hysteresis data amount and the working data amount of each pitch motor can be calculated based on the speed of each pitch motor, and the performance index value of the pitch toothed belt can be calculated based on the speed hysteresis data amount and the working data amount of each pitch motor. Among them, the speed hysteresis data amount is the data amount when the speed of a certain pitch motor is not 0 and the speed of the other pitch motors is 0. The working data amount is the data amount when the speed of a certain pitch motor is not 0.

[0055] For example, the speed lag time of each pitch motor can be determined based on the speed of each pitch motor, and the performance index value of the pitch toothed belt can be calculated based on the speed lag time of each pitch motor. The speed lag time is the time required for the speed of a pitch motor to change from non-zero to zero.

[0056] In S230, after the performance index value is determined, it can be determined whether the variable pitch toothed belt is abnormal based on the performance index value. It should be noted that the performance index value can only indicate whether the variable pitch toothed belt is abnormal. When the performance index value indicates that the variable pitch toothed belt is abnormal, it can be further determined by troubleshooting and other methods to determine which specific variable pitch toothed belt is abnormal.

[0057] Exemplarily, if the performance indicator value is less than a preset threshold, it can be determined that the pitch toothed belt is abnormal.

[0058] Exemplarily, a performance change curve of the variable pitch toothed belt can be drawn based on the performance index value and the historical performance index value, and whether the variable pitch toothed belt is abnormal can be determined based on the trend of the performance change curve. For example, if the performance of the variable pitch toothed belt shows a downward trend, it can be determined that the variable pitch toothed belt is abnormal.

[0059] The embodiments of the present application can determine the performance index value of the pitch toothed belt based on the rotational speed of the pitch motor to characterize the health of the pitch toothed belt, and then detect whether the pitch toothed belt is abnormal based on the performance index value of the pitch toothed belt, thereby quantifying the health of the pitch toothed belt and facilitating prevention and intervention in the early stages of failure.

[0060] Taking multiple pitch motors as an example, illustratively, the above S220 may include the following steps:

[0061] For each of the plurality of pitch motors, perform the following operations:

[0062] Counting the first data amount in which the speed of the current variable pitch motor is not the reference value in the first cycle, and the speeds of other variable pitch motors are all the reference values, and

[0063] Counting a second data amount in which the rotation speed of the current pitch motor is not the reference value in the first cycle, and the other pitch motors are pitch motors other than the current pitch motor among the multiple pitch motors;

[0064] Determine a speed hysteresis value of the current pitch motor according to a first data amount corresponding to the current pitch motor and a second data amount corresponding to each pitch motor;

[0065] The performance index value of the pitch toothed belt is determined according to the speed hysteresis value of each pitch motor.

[0066] Exemplarily, the reference value may be 0. For example, if there are three pitch motors, namely pitch motor No. 1, pitch motor No. 2 and pitch motor No. 3, then the first data amount d1 that the speed of pitch motor No. 1 is not 0, and the speeds of pitch motor No. 2 and pitch motor No. 3 are both 0 in the first period can be counted; the first data amount d2 that the speed of pitch motor No. 2 is not 0, and the speeds of pitch motor No. 1 and pitch motor No. 3 are both 0; and the first data amount d3 that the speed of pitch motor No. 3 is not 0, and the speeds of pitch motor No. 1 and pitch motor No. 2 are both 0; and,

[0067] The second data volume m1 of the rotation speed of the No. 1 pitch motor not being 0, the second data volume m2 of the rotation speed of the No. 2 pitch motor not being 0, and the second data volume m3 of the rotation speed of the No. 3 pitch motor not being 0 are counted in the first cycle.

[0068] The rotation speed hysteresis value of each pitch motor may be calculated according to the first data amount of each pitch motor and the second data amount of each pitch motor.

[0069] Exemplarily, the speed hysteresis value of each pitch motor may be determined in the following manner:

[0070] Accumulating the second data amounts corresponding to the pitch motors to obtain a third data amount;

[0071] The ratio of the first data amount to the third data amount corresponding to the current variable pitch motor is determined as the speed hysteresis degree value of the current variable pitch motor.

[0072] Exemplarily, the second data amount of each pitch motor may be accumulated to obtain the third data amount, for example, m=m1+m2+m3.

[0073] Exemplarily, the speed hysteresis value of each pitch motor can be determined based on the ratio of the first data amount to the third data amount of each pitch motor. For example, l1=d1 / m, l2=d2 / m, l3=d3 / m.

[0074] Among them, l1, l2 and l3 are the speed hysteresis values ​​of pitch motor No. 1, pitch motor No. 2 and pitch motor No. 3 respectively.

[0075] The embodiment of the present application can obtain the speed hysteresis value of each pitch motor based on whether the speed of each pitch motor is 0, which is helpful for the subsequent calculation of the performance index value of the pitch toothed belt, and realizes the quantification of the health of the pitch toothed belt, so that the operation and maintenance personnel can understand the working status of the pitch toothed belt in time, and facilitate prevention and intervention in the early stage of failure.

[0076] Based on the speed hysteresis value of each pitch motor, the performance index value of the pitch toothed belt can be determined, thereby realizing the quantification of the health of the pitch toothed belt.

[0077] The embodiment of the present application can determine the performance index value of the pitch toothed belt by counting the speed lag data of each pitch motor in the first cycle and the working data of each pitch motor. It can not only detect the pitch toothed belt in real time, but also quantitatively determine the performance of the pitch toothed belt, which helps operation and maintenance personnel to promptly discover abnormalities of the pitch toothed belt and avoid failure of the pitch system due to breakage of the pitch toothed belt.

[0078] Exemplarily, the performance index value of the pitch toothed belt may be determined in the following manner:

[0079] Determine the maximum speed hysteresis value from the speed hysteresis values ​​of the pitch motors, and record it as the first speed hysteresis value;

[0080] Determine a first product value of the first rotational speed hysteresis value and a performance index scaling parameter, the performance index scaling parameter being used to scale the first rotational speed hysteresis value so that the scaled first rotational speed hysteresis value meets a preset condition;

[0081] When the cumulative sum of the second data amounts corresponding to the pitch motors is greater than the first threshold value and the first product value is greater than or equal to the reference performance index value, determining that the performance index value of the pitch toothed belt is 0;

[0082] When the cumulative sum of the second data amounts corresponding to each pitch motor is greater than the first threshold and the first product value is less than the reference performance index value, the difference between the reference performance index value and the first product value is determined as the performance index value of the pitch toothed belt.

[0083] The performance indicator scaling parameter is used to scale the first speed hysteresis value so that the scaled first speed hysteresis value meets a preset condition. For example, the scaled first speed hysteresis value can be distributed between 0-e, where e is a reference performance indicator value. In actual application, e can be a range interval.

[0084] Exemplarily, the first speed hysteresis value is the maximum value among the speed hysteresis values ​​of each pitch motor. For the convenience of description, the embodiment of the present application records the maximum speed hysteresis value as the first speed hysteresis value.

[0085] For example, the performance indicator value can be expressed as follows:

[0086]

[0087] Among them, h is the performance index value of the variable pitch toothed belt, a is the performance index scaling parameter,

[0088] The sizes of a and e can be set according to actual needs. For example, e is set to [0,100]. If it is between [0,0.1], a needs to be set to 1000.

[0089] The embodiment of the present application can calculate the performance index value of the pitch toothed belt based on the speed hysteresis value of each pitch motor and the above-mentioned performance index value calculation formula, thereby realizing the quantification of the health degree of the pitch toothed belt.

[0090] In some embodiments, Figure 3 As shown, the detection method of the variable pitch toothed belt may include the following steps:

[0091] S310: When the wind turbine generator set is in operation, obtain target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power.

[0092] S320. Determine a performance index value of the pitch-changing toothed belt according to the rotation speed of each pitch-changing motor.

[0093] S330, processing the performance index values ​​corresponding to each time point in the first cycle and the performance index values ​​corresponding to each time point in the historical cycle to obtain a performance change curve of the variable pitch toothed belt.

[0094] The historical period is at least one period before the first period.

[0095] S340: When the performance change curve shows a downward trend, determine that the pitch toothed belt is abnormal, and output abnormal prompt information.

[0096] The process of S310-S320 can refer to the above embodiment, and the other steps are described in detail below, as shown below:

[0097] In S330, the historical cycle may be at least one cycle before the first cycle. In order to accurately determine the performance trend of the variable pitch toothed belt, the historical cycle here may be at least one cycle that is located before the first cycle and is sequentially adjacent to the first cycle. The process of determining the performance index value of the variable pitch toothed belt in each cycle is similar.

[0098] Exemplarily, after obtaining the performance index value of the pitch toothed belt in the first cycle, the embodiment of the present application can process the performance index value in the first cycle and the performance index value in the historical cycle, establish a coordinate system with time as the horizontal axis and the performance index value as the vertical axis, and plot each performance index value in the coordinate system to obtain a performance change curve, such as Figure 4 Based on the performance change curve, the operation and maintenance personnel can intuitively understand the performance trend (health trend) of the variable pitch toothed belt.

[0099] When displaying the performance change curve, the unit, wind farm, date, performance index value and other information corresponding to the performance change curve can be displayed at the same time, so that the operation and maintenance personnel can understand the operating status of the variable pitch toothed belt of each unit.

[0100] For example, when the performance change curve shows a downward trend, that is, the performance index value in the first cycle is lower than that in the historical cycle, it can be determined that the pitch toothed belt is abnormal. In this way, the abnormality of the pitch toothed belt can be discovered in time at the early stage of the fault, reducing the impact on the wind turbine.

[0101] For example, when it is determined that the pitch toothed belt is abnormal, an abnormal prompt message may be output to prompt the operation and maintenance personnel to intervene in a timely manner.

[0102] The embodiment of the present application does not limit the output method of the abnormal prompt information. For example, the abnormal prompt information can be output through buzzer alarm, text message, email, phone call, flashing indicator light, etc.

[0103] In some embodiments, the target active power of the wind turbine generator at multiple time points in the first cycle may be obtained in the following manner:

[0104] Acquire a first active power of the wind turbine generator at multiple time points in a first cycle;

[0105] An active power having a power value greater than a second threshold is determined from each first active power, and the active power having a power value greater than the second threshold is determined as the target active power.

[0106] The first active power may be the active power of the wind turbine generator set at each time point in the first cycle. The second threshold is used to filter out the active power that meets the conditions from the first active power. For example, the active power greater than the second threshold among the first active powers may be determined as the target active power. Exemplarily, the second threshold may be 0, or a value greater than 0 but close to 0.

[0107] The embodiment of the present application determines an active power greater than a second threshold value from each first active power as the target active power, which can avoid invalid detection caused by shutdown of the wind turbine generator set.

[0108] The embodiment of the present application can obtain the target active power of the wind turbine and the rotational speed of each pitch motor from the SCADA system without the need for additional data acquisition devices, thereby reducing costs; at the same time, the embodiment of the present application can detect the pitch toothed belt in real time based on the rotational speed of the pitch motor, so that the operation and maintenance personnel can discover abnormalities of the pitch toothed belt as early as possible, and because the embodiment of the present application detects the pitch toothed belt when the wind turbine has been put into production, the detection result can accurately reflect the performance of the pitch toothed belt; in addition, the embodiment of the present application uses the rotational speed of the pitch motor to calculate the performance index value of the pitch toothed belt, and quantifies the degree of looseness of the pitch toothed belt caused by wear, offset, etc., which is more conducive to the operation and maintenance personnel to arrange maintenance work.

[0109] Based on the same inventive concept, the present application embodiment also provides a detection device for a variable pitch toothed belt. Figure 5 The detection device for the variable pitch toothed belt provided in the embodiment of the present application is described in detail.

[0110] Figure 5 A structural diagram of a detection device for a variable pitch toothed belt provided in an embodiment of the present application.

[0111] like Figure 5 As shown, the detection device of the variable pitch toothed belt may include:

[0112] The acquisition module 501 is used to acquire the target active power of the wind turbine generator at multiple time points in the first cycle and the rotation speed of at least one variable pitch motor corresponding to the target active power when the wind turbine generator set is in operation;

[0113] The detection module 502 is used to detect whether the pitch toothed belt is abnormal according to the rotation speed of each pitch motor.

[0114] In the embodiment of the present application, when the wind turbine generator set is in operation, the target active power of the wind turbine generator at multiple time points in the first cycle and the speed of at least one variable pitch motor corresponding to the target active power are obtained; according to the speed of each variable pitch motor, whether the variable pitch toothed belt is abnormal is detected. That is, the embodiment of the present application can detect the performance of the variable pitch toothed belt in real time after the wind turbine generator set is put into operation, which is convenient for the operation and maintenance personnel to find the abnormality of the variable pitch toothed belt as early as possible, and avoid the failure of the variable pitch system caused by the toothed belt breakage. At the same time, since the embodiment of the present application is carried out after the wind turbine generator set is put into operation, the detection result can truly reflect the performance of the variable pitch toothed belt in the variable pitch system with high accuracy.

[0115] In some embodiments, the detection module 502 includes:

[0116] A determination unit, used to determine a performance index value of the pitch-changing toothed belt according to the rotation speed of each pitch-changing motor;

[0117] The detection unit is used to detect whether the variable pitch toothed belt is abnormal according to the performance index value.

[0118] In some embodiments, the at least one pitch motor includes a plurality of pitch motors;

[0119] Determine the unit, specifically for:

[0120] For each of the plurality of pitch motors, perform the following operations:

[0121] Counting the first data amount in which the speed of the current variable pitch motor is not the reference value in the first cycle, and the speeds of other variable pitch motors are all the reference values, and

[0122] Counting a second data amount in which the rotation speed of the current pitch motor is not the reference value in the first cycle, and the other pitch motors are pitch motors other than the current pitch motor among the multiple pitch motors;

[0123] Determine a speed hysteresis value of the current pitch motor according to a first data amount corresponding to the current pitch motor and a second data amount corresponding to each pitch motor;

[0124] The performance index value of the pitch toothed belt is determined according to the speed hysteresis value of each pitch motor.

[0125] In some embodiments, the determining unit is specifically configured to:

[0126] Accumulating the second data amounts corresponding to the pitch motors to obtain a third data amount;

[0127] The ratio of the first data amount to the third data amount corresponding to the current variable pitch motor is determined as the speed hysteresis degree value of the current variable pitch motor.

[0128] In some embodiments, the determining unit is specifically configured to:

[0129] Determine the maximum speed hysteresis value from the speed hysteresis values ​​of each pitch motor, and record it as the first speed hysteresis value;

[0130] Determine a first product value of the first rotational speed hysteresis value and a performance index scaling parameter, the performance index scaling parameter being used to scale the first rotational speed hysteresis value so that the scaled first rotational speed hysteresis value meets a preset condition;

[0131] When the cumulative sum of the second data amounts corresponding to the pitch motors is greater than the first threshold value and the first product value is greater than or equal to the reference performance index value, determining that the performance index value of the pitch toothed belt is 0;

[0132] When the cumulative sum of the second data amounts corresponding to each pitch motor is greater than the first threshold and the first product value is less than the reference performance index value, the difference between the reference performance index value and the first product value is determined as the performance index value of the pitch toothed belt.

[0133] In some embodiments, the detection unit is specifically configured to:

[0134] Processing the performance index values ​​corresponding to each time point in the first cycle and the performance index values ​​corresponding to each time point in the historical cycle to obtain a performance change curve of the variable pitch toothed belt, wherein the historical cycle is at least one cycle before the first cycle;

[0135] When the performance change curve shows a downward trend, the pitch toothed belt is determined to be abnormal, and an abnormal prompt message is output.

[0136] In some embodiments, the acquisition module 501 is specifically used to:

[0137] Acquire a first active power of the wind turbine generator at multiple time points in a first cycle;

[0138] An active power having a power value greater than a second threshold is determined from each first active power, and the active power having a power value greater than the second threshold is determined as the target active power.

[0139] The detection device for the pitch-changing toothed belt provided in the embodiment of the present application can realize Figure 1-4 To avoid repetition, the various processes in the embodiment of the detection method of the variable pitch toothed belt are not described again here.

[0140] Based on the same inventive concept, the embodiment of the present application also provides an electronic device, which may be, for example, a tablet computer, a notebook computer, a handheld computer, etc. Figure 6 The electronic device provided in the embodiments of the present application is described in detail.

[0141] like Figure 6 As shown, the electronic device may include a processor 601 and a memory 602 for storing computer program instructions.

[0142] The processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0143] The memory 602 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In one example, the memory 602 may include a removable or non-removable (or fixed) medium, or the memory 602 is a non-volatile solid-state memory. In one example, the memory 602 may be a read-only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these.

[0144] The processor 601 reads and executes the computer program instructions stored in the memory 602 to implement Figure 1-Figure 4 The method in the embodiment shown in the figure is achieved Figure 1-Figure 4 The corresponding technical effects achieved by executing the method in the illustrated embodiment are not described in detail here for the sake of brevity.

[0145] In one example, the electronic device may further include a communication interface 603 and a bus 604. Figure 6 As shown, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 604 and communicate with each other.

[0146] The communication interface 603 is mainly used to implement communication between various modules, devices and / or equipment in the embodiments of the present application.

[0147] Bus 604 includes hardware, software or both, and each component of electronic device is coupled to each other.For example, but not limitation, bus 604 may include accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics bus, enhanced industry standard architecture (Extended Industry Standard Architecture, EISA) bus, front side bus (Front Side Bus, FSB), hypertransmission (Hyper Transport, HT) interconnection, industry standard architecture (IndustryStandard Architecture, ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 604 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0148] When the wind turbine generator set is in operation, the electronic device can execute the detection method of the pitch toothed belt in the embodiment of the present application after obtaining the target active power of the wind turbine generator at multiple time points in the first cycle and the speed of at least one pitch motor corresponding to the target active power, thereby realizing the combination of Figure 1-4 The detection method of the pitch toothed belt described and Figure 5 A detection device for a pitch toothed belt is described.

[0149] In addition, in combination with the pitch-changing toothed belt detection method in the above embodiment, the present application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any pitch-changing toothed belt detection method in the above embodiment is implemented.

[0150] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0151] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), appropriate firmware, plug-in, function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or communication link by a data signal carried in a carrier. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (Radio Frequency, RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0152] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0153] The above reference is according to the method of the present application embodiment, the flow chart of the device (system) and the computer program product and / or the block diagram of the present application embodiment. It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0154] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for detecting a pitch toothed belt, It is characterized in that include: When the wind turbine generator set is in operation, obtaining target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power; Whether the pitch toothed belt is abnormal is detected according to the rotation speed of each pitch motor.

2. The method according to claim 1, It is characterized in that The detecting whether the pitch toothed belt is abnormal according to the rotation speed of each pitch motor comprises: Determining a performance index value of the pitch-changing toothed belt according to the rotation speed of each pitch-changing motor; Whether the variable pitch toothed belt is abnormal is detected according to the performance index value.

3. The method according to claim 2, It is characterized in that The at least one variable pitch motor includes a plurality of variable pitch motors, and determining the performance index value of the variable pitch toothed belt according to the rotation speed of each of the variable pitch motors includes: For each of the plurality of pitch motors, the following operations are performed: Counting the first data amount in which the rotation speed of the current pitch motor is not the reference value in the first cycle, and the rotation speeds of other pitch motors are all the reference values, and Counting a second data amount of the rotation speed of the current pitch motor not being a reference value in the first cycle, wherein the other pitch motors are pitch motors other than the current pitch motor among the multiple pitch motors; Determining a speed hysteresis value of the current pitch motor according to a first data amount corresponding to the current pitch motor and a second data amount corresponding to each pitch motor; The performance index value of the pitch-changing toothed belt is determined according to the rotational speed hysteresis value of each pitch-changing motor.

4. The method according to claim 3, It is characterized in that The determining, according to the first data amount corresponding to the current pitch motor and the second data amount corresponding to each pitch motor, the speed hysteresis value of the current pitch motor comprises: Accumulating the second data amounts corresponding to the pitch motors to obtain a third data amount; The ratio of the first data amount corresponding to the current variable pitch motor to the third data amount is determined as the speed hysteresis degree value of the current variable pitch motor.

5. The method according to claim 3, It is characterized in that Determining the performance index value of the pitch-changing toothed belt according to the rotational speed hysteresis value of each pitch-changing motor includes: Determining a maximum speed hysteresis value from the speed hysteresis values ​​of the pitch motors, and recording it as a first speed hysteresis value; Determine a first product value of the first speed hysteresis value and a performance index scaling parameter, wherein the performance index scaling parameter is used to scale the first speed hysteresis value so that the scaled first speed hysteresis value meets a preset condition; When the cumulative sum of the second data amounts corresponding to the pitch motors is greater than the first threshold value, and the first product value is greater than or equal to the reference performance index value, determining that the performance index value of the pitch toothed belt is 0; When the cumulative sum of the second data amounts corresponding to each of the pitch motors is greater than a first threshold and the first product value is less than a reference performance index value, the difference between the reference performance index value and the first product value is determined as the performance index value of the pitch toothed belt.

6. The method according to claim 2, It is characterized in that The detecting whether the pitch toothed belt is abnormal according to the performance indicator value includes: Processing the performance index values ​​corresponding to each time point in the first cycle and the performance index values ​​corresponding to each time point in the historical cycle to obtain a performance change curve of the variable pitch toothed belt, wherein the historical cycle is at least one cycle before the first cycle; When the performance change curve shows a downward trend, it is determined that the pitch toothed belt is abnormal, and an abnormal prompt message is output.

7. The method according to any one of claims 1 to 6, It is characterized in that Obtain the target active power of the wind turbine generator at multiple time points in the first cycle, including: Acquire a first active power of the wind turbine generator at multiple time points in a first cycle; An active power having a power value greater than a second threshold is determined from each of the first active powers, and the active power having a power value greater than the second threshold is determined as the target active power.

8. A detection device for a pitch toothed belt, It is characterized in that include: An acquisition module, used for acquiring, when the wind turbine generator set is in operation, a target active power of the wind turbine generator at multiple time points in a first cycle, and a rotation speed of at least one variable pitch motor corresponding to the target active power; The detection module is used to detect whether the pitch toothed belt is abnormal according to the rotation speed of each pitch motor.

9. An electronic device, It is characterized in that The electronic device comprises: processor; a memory for storing computer program instructions; When the computer program instructions are executed by the processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having computer program instructions stored thereon, It is characterized in that When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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