Vibration value acquisition method, early warning method and device for transmission chain of wind turbine generator

Abstract

The invention discloses a vibration value acquisition method, an early warning method and an early warning device for a transmission chain of a wind turbine generator. The acquisition method comprises the following steps: acquiring a rotating speed range of a generator; dividing the rotating speed range of the generator to obtain a plurality of sub-ranges, and establishing a data record set according to the number of the sub-ranges; acquiring instantaneous rotating speed values and vibration data in real time to obtain a corresponding rotating speed value sequence and a vibration data sequence; determining the rotating speed stability according to the rotating speed value sequence; if the stable condition is unstable, abandoning the rotating speed value sequence; if the stable condition is stable, determining a sub-range corresponding to the rotating speed value sequence according to a preset judgment condition, and obtaining a corresponding vibration value according to the vibration data sequence; acquiring a corresponding data record number according to a sub-range corresponding to the rotating speed value sequence, and storing the vibration value to a data record set according to the data record number and a preset record number; therefore, a relatively accurate vibration value is obtained for subsequent analysis and processing.

Description

Technical Field

[0001] The present application relates to the field of wind turbine monitoring technology, and in particular to a method for collecting vibration values ​​of a wind turbine transmission chain, a method for early warning of vibration values ​​of a wind turbine transmission chain, a device for collecting vibration values ​​of a wind turbine transmission chain, and a device for early warning of vibration values ​​of a wind turbine transmission chain. Background Art

[0002] In the related art, the vibration value of the wind turbine transmission chain refers to the measurement of the vibration generated by the various components of the transmission chain in the wind turbine during operation; the transmission chain of the wind turbine is the key part that converts the mechanical energy of the wind rotor rotation into electrical energy, and it usually includes the wind rotor (blades and hub), main shaft, gearbox and generator. During the operation of the wind turbine, due to uneven wind force, manufacturing errors, wear, improper maintenance or design defects of mechanical parts, the various components of the transmission chain may vibrate. If these vibrations are not controlled, they may cause component fatigue, damage, or even failure of the entire system, so it is necessary to monitor the vibration value of the wind turbine transmission chain in real time.

[0003] At present, the equipment for collecting vibration values ​​of the transmission chain of a wind turbine generator set includes a vibration sensor (or acceleration sensor), a speed sensor (or encoder), a collection device and a server, wherein the vibration sensor converts the vibration signal of the transmission chain measuring point into a voltage signal, the speed sensor senses the transmission chain rotation measuring point and outputs a pulse signal, the collection device regularly collects the voltage signal of the vibration sensor and the pulse signal of the speed sensor, obtains the original vibration waveform and the speed value, calculates and processes to obtain the vibration characteristic value, determines whether to alarm according to the set threshold value, and finally transmits the data to the remote server through network communication; however, due to the large differences in the operating conditions of the wind turbine at the time of vibration value collection, such as stopped, yaw, low speed, uniform speed and variable speed operating conditions, the vibration values ​​under different conditions (especially variable speed) are unstable, so the regularly accumulated vibration values ​​are mixed with unstable vibration values, which not only interferes with the vibration value trend analysis, but also makes it difficult to determine the vibration alarm threshold. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, one purpose of the present application is to propose a vibration value collection method for a wind turbine transmission chain, which can collect vibration values ​​at different speeds and eliminate abnormal vibration value interference under unstable working conditions, so as to obtain more accurate vibration values ​​for subsequent analysis and processing.

[0005] The second objective of the present application is to provide a vibration value early warning method for a wind turbine transmission chain.

[0006] The third objective of the present application is to provide a vibration value collection device for a wind turbine transmission chain.

[0007] The fourth objective of the present application is to provide a vibration value early warning device for a wind turbine transmission chain.

[0008] To achieve the above-mentioned purpose, the first aspect of the present application proposes a method for collecting vibration values ​​of a wind turbine transmission chain, including the following steps: obtaining a generator speed range; dividing the generator speed range to obtain multiple sub-ranges, and establishing a data record set according to the number of sub-ranges; collecting instantaneous speed values ​​and vibration data in real time to obtain corresponding speed value sequences and vibration data sequences; determining the stability of the speed according to the speed value sequence; if the stability is unstable, discarding the speed value sequence; if the stability is stable, determining the sub-range corresponding to the speed value sequence according to preset judgment conditions, and obtaining the corresponding vibration value according to the vibration data sequence; obtaining the corresponding number of data records according to the sub-range corresponding to the speed value sequence, and storing the vibration value in the data record set according to the number of data records and the preset number of records.

[0009] According to the vibration value collection method of the wind turbine transmission chain of the embodiment of the present application, by collecting vibration values ​​at different speeds and eliminating abnormal vibration value interference under unstable working conditions, such as variable speed, a more accurate vibration value is obtained for subsequent analysis and processing.

[0010] In addition, the vibration value collection method of the wind turbine transmission chain proposed in the above embodiment of the present application may also have the following additional technical features:

[0011] Optionally, determining the stability of the speed according to the speed value sequence includes: determining the corresponding average value, maximum value and minimum value according to the speed value sequence; if the maximum value and the minimum value are both greater than or equal to the average value minus half of the sub-range interval size and less than or equal to the average value plus half of the sub-range interval size, then the speed value sequence is determined to be stable; otherwise, the speed value sequence is determined to be unstable.

[0012] Optionally, determining the sub-range corresponding to the rotational speed value sequence according to a preset judgment condition includes: judging in sequence according to the sub-range sequence number whether the average value satisfies the preset judgment condition, and if so, the sub-range corresponding to the rotational speed value sequence is the sub-range corresponding to the sub-range sequence number, wherein the preset judgment condition is implemented using the following formula:

[0013] RotaL+(index-1)*Varea≤Rmean <RotaL+index*Varea

[0014] Among them, RotaL~RotaH represents the generator speed range, index=1,…,Rnum represents the sub-range sequence number, and Varea represents the sub-range interval size.

[0015] Optionally, obtain the corresponding vibration value according to the following formula:

[0016]

[0017] Where Veffect represents the vibration value, n represents the number of data in the vibration data sequence, and V k Represents the kth vibration data.

[0018] Optionally, the vibration value is stored in the data record set according to the number of data records and the preset number of records, including: when the number of data records is less than the preset number of records, adding a record to the data record corresponding to the data record set and recording the vibration value; when the number of data records is not less than the preset number of records, calculating the average value of all vibration values ​​and recording the average value.

[0019] To achieve the above-mentioned purpose, the second aspect of the present application proposes a vibration value warning method for a wind turbine transmission chain, comprising the following steps: obtaining an average value of vibration values ​​in each speed sub-range in a data record set to obtain an average value sequence, wherein the average value of vibration values ​​in each speed sub-range in the data record set is collected using the vibration value collection method as described in any one of the first aspects; obtaining the number of wind turbines in the wind farm to obtain a corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines; establishing a wind turbine record set, wherein each data record in the wind turbine record set includes at least an average value sequence; obtaining IP information of other collection devices to obtain corresponding average value sequences in sequence according to the IP information of the other collection devices, and storing them in the wind turbine record set; when the number of data records in the wind turbine record set is not less than the statistical record number, calculating the average value corresponding to each sub-range in the stored average value sequence to obtain a result sequence; obtaining a preset reference threshold coefficient, multiplying the result sequence by the reference threshold coefficient respectively to obtain a reference threshold sequence, and performing a warning judgment based on the reference threshold sequence.

[0020] According to the vibration value early warning method of the wind turbine transmission chain of the embodiment of the present application, the alarm reference threshold is obtained by statistically analyzing the average value sequence obtained by the vibration value collection method of the wind turbine transmission chain described above, thereby improving the accuracy of the vibration value early warning.

[0021] To achieve the above-mentioned purpose, the third aspect of the present application proposes a vibration value acquisition device for a wind turbine transmission chain, including a first acquisition module for acquiring a generator speed range; a division module for dividing the generator speed range to obtain multiple sub-ranges, and establishing a data record set according to the number of sub-ranges; an acquisition module for real-time acquisition of instantaneous speed values ​​and vibration data to obtain corresponding speed value sequences and vibration data sequences; a speed judgment processing module for determining the stability of the speed according to the speed value sequence; if the stability is unstable, the speed value sequence is discarded; if the stability is stable, the sub-range corresponding to the speed value sequence is determined according to a preset judgment condition, and the corresponding vibration value is acquired according to the vibration data sequence; a record storage module for acquiring the corresponding number of data records according to the sub-range corresponding to the speed value sequence, and storing the vibration value in the data record set according to the number of data records and a preset number of records.

[0022] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a vibration value warning device for a wind turbine transmission chain, including: a second acquisition module, used to obtain the average value of the vibration value in each speed sub-range in the data record set to obtain an average value sequence, wherein the average value of the vibration value in each speed sub-range in the data record set is collected using the vibration value collection method as described in any one of the first aspects; a third acquisition module, used to obtain the number of wind turbines in the wind farm, so as to obtain the corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines; an establishment module, used to establish a wind turbine record set, the wind turbine record Each data record in the record set includes at least a sequence of average values; a fourth acquisition module, used to obtain IP information of other acquisition devices, so as to obtain corresponding sequences of average values ​​in sequence according to the IP information of the other acquisition devices, and store them in the fan record set; a calculation module, used to calculate the average value corresponding to each sub-range in the stored average value sequence when the number of data records in the fan record set is not less than the number of statistical records, so as to obtain a result sequence; an early warning judgment module, used to obtain a preset reference threshold coefficient, multiply the result sequence by the reference threshold coefficient respectively to obtain a reference threshold sequence, and make an early warning judgment based on the reference threshold sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a flow chart of a method for collecting vibration values ​​of a transmission chain of a wind turbine generator set according to an embodiment of the present application;

[0024] Figure 2 It is a schematic flow chart of a vibration value early warning method of a wind turbine transmission chain according to an embodiment of the present application;

[0025] Figure 3Schematic diagram of a block diagram of a vibration value acquisition device for a transmission chain of a wind turbine generator set according to an embodiment of the present application;

[0026] Figure 4 4 is a block diagram of a vibration value warning device for a transmission chain of a wind turbine generator set according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0028] In order to better understand the above technical solution, exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Figure 1 FIG. 1 is a flow chart of a method for collecting vibration values ​​of a wind turbine transmission chain according to an embodiment of the present application, such as Figure 1 As shown, the vibration value collection method of the wind turbine transmission chain includes the following steps:

[0031] S101, obtaining a generator speed range.

[0032] That is, determine the generator speed range required for analysis in the drive train components.

[0033] S102, dividing the generator speed range to obtain a plurality of sub-ranges, and establishing a data record set according to the number of sub-ranges.

[0034] That is, the number of data records in the data record set is the same as the number of sub-ranges.

[0035] As an embodiment, the generator rotation speed range is equally divided to obtain a plurality of sub-ranges of equal range size, wherein each data record in the data record set includes a vibration value.

[0036] It should be noted that the specific division into several sub-ranges is determined according to actual application requirements and operating characteristics of the wind turbine generator system, and this application does not make any specific limitation on this.

[0037] S103, collecting instantaneous rotational speed values ​​and vibration data in real time to obtain corresponding rotational speed value sequences and vibration data sequences.

[0038] That is to say, within a period of time, instantaneous rotational speed values ​​and vibration data are collected in real time to obtain corresponding rotational speed value sequences and vibration data sequences.

[0039] S104, determining the stability of the speed according to the speed value sequence; if the stability is unstable, discarding the speed value sequence; if the stability is stable, determining the sub-range corresponding to the speed value sequence according to the preset judgment condition, and obtaining the corresponding vibration value according to the vibration data sequence.

[0040] It should be noted that if the stability condition is unstable, the speed value sequence is discarded and the process jumps to the above step S103 for re-collection; if the stability condition is stable, the vibration data is recorded and sent to the server according to the sub-range to which the speed belongs and then re-collected.

[0041] As an embodiment, determining the stability of the rotational speed according to the rotational speed value sequence includes: determining the corresponding average value, maximum value and minimum value according to the rotational speed value sequence; if the maximum value and the minimum value are both greater than or equal to the average value minus half of the size of the sub-range interval and less than or equal to the average value plus half of the size of the sub-range interval, then the rotational speed value sequence is determined to be stable; otherwise, the rotational speed value sequence is determined to be unstable.

[0042] As an embodiment, determining the sub-range corresponding to the rotational speed value sequence according to a preset judgment condition includes: judging in sequence according to the sub-range sequence number whether the average value satisfies the preset judgment condition; if so, the sub-range corresponding to the rotational speed value sequence is the sub-range corresponding to the sub-range sequence number, wherein the preset judgment condition is implemented using the following formula:

[0043] RotaL+(index-1)*Varea≤Rmean <RotaL+index*Varea

[0044] Among them, RotaL~RotaH represents the generator speed range, index=1,…,Rnum represents the sub-range sequence number, and Varea represents the sub-range interval size.

[0045] As an embodiment, the corresponding vibration value is obtained according to the following formula:

[0046]

[0047] Where Veffect represents the vibration value, n represents the number of data in the vibration data sequence, and V k Represents the kth vibration data.

[0048] S105. Obtain the corresponding number of data records according to the sub - range corresponding to the rotational speed value sequence, and store the vibration value into the data record set according to the number of data records and the preset number of records.

[0049] As an embodiment, storing the vibration value into the data record set according to the number of data records and the preset number of records includes: when the number of data records is less than the preset number of records, add a record to the corresponding data record in the data record set and record the vibration value; when the number of data records is not less than the preset number of records, calculate the average value of all vibration values and record the average value.

[0050] Based on the above - mentioned embodiment, this embodiment provides a possible implementation manner of a specific vibration value acquisition method for a wind turbine drive train, including the following steps:

[0051] S11. Determine the generator speed range required for analysis in the drive train components: RotaL~RotaH (the rotational speed is a floating - point value, with the unit of revolutions per minute r / min), and divide the speed range into Rnum equal sub - ranges (Rnum is an integer greater than 1). The size of the obtained sub - range interval is: Varea=(RotaH - RotaL) / Rnum. Each sub - range is respectively Rarea[1]~Rarea[Rnum], where the sub - range Rarea[index] with the serial number index represents the speed range RotaL+(index - 1)*Varea≤Rarea[index]<RotaL+index*Varea, index = 1,...,Rnum; establish Rnum data record sets [C1,C2,...,C Rnum , and each data record in the data record set includes the vibration value VRMS.

[0052] S12. Real - time collect the instantaneous rotational speed value R and vibration data V. After collecting for a certain period of time, obtain the rotational speed value sequence D R =[R1,R2…R P and the vibration data sequence D V =[V1,V2…V n , where p is the number of data in the rotational speed value sequence and n is the number of data in the vibration data sequence. Calculate and determine whether the rotational speed is stable according to the rotational speed value sequence D R , and the specific method is:

[0053] Calculate the average value The maximum value Rmax = max(R1,R P ) and the minimum value Rmin = min(R1,R P), judge the conditions Rmean-Varea / 2≤Rmax≤Rmean+Varea / 2 and Rmean-Varea / 2≤Rmin≤Rmean+Varea / 2, if the conditions are met, it is stable, otherwise it is unstable; if it is unstable, go to step S13, if it is stable, go to S14.

[0054] S13, the rotation speed is unstable, the collected vibration data is discarded, and the next round of collection is entered according to step S12.

[0055] S14, when the speed is stable, determine which speed sub-range the speed belongs to. The specific method is: index=1,…,Rnum, and judge whether the condition RotaL+(index-1)*Varea≤Rmean<RotaL+index*Varea is established in turn. If it is, the speed belongs to the sub-range with serial number m=index. According to the collected vibration data sequence D V =[V1,V2…V n ]Calculate the effective value of acceleration (vibration value) Where n is the number of data in the vibration data sequence; send a vibration data record to the server, including but not limited to the acquisition start timestamp, the speed range sequence number m and the vibration value Veffect; after knowing m, in the data record set C m Check the number of data records cnt. When cnt is less than the predetermined number of records NT (NT is greater than 1), go to step S15. When cnt is not less than NT, go to step S16.

[0056] S15, adding a new data record to the data record set Cm, assigning VRMS in the data record to Veffect, and then proceeding to the next round of collection according to step S12.

[0057] S16, data record set C m The preset number of records NT has been reached, and the average value of NT vibration values ​​VRMS is calculated. Then, the next round of collection is entered into step S12.

[0058] In the vibration value acquisition method of the wind turbine transmission chain of the embodiment of the present disclosure, first, the generator speed range is obtained; then, the generator speed range is divided to obtain multiple sub-ranges, and a data record set is established according to the number of sub-ranges; then, the instantaneous speed value and vibration data are acquired in real time to obtain a corresponding speed value sequence and vibration data sequence; then, the stability of the speed is determined according to the speed value sequence; if the stability is unstable, the speed value sequence is discarded; if the stability is stable, the sub-range corresponding to the speed value sequence is determined according to the preset judgment condition, and the corresponding vibration value is acquired according to the vibration data sequence; finally, the corresponding number of data records is acquired according to the sub-range corresponding to the speed value sequence, and the vibration value is stored in the data record set according to the number of data records and the preset number of records; thus, by acquiring vibration values ​​at different speeds and eliminating abnormal vibration value interference under unstable conditions, such as variable speed, a more accurate vibration value is obtained for subsequent analysis and processing.

[0059] In order to implement the above embodiment, this embodiment also provides a vibration value early warning method for a transmission chain of a wind turbine generator set.

[0060] Figure 2 is a flow chart showing a vibration value early warning method for a wind turbine transmission chain according to an exemplary embodiment. Figure 2 As shown, the method comprises the following steps:

[0061] S201, obtaining an average value of vibration values ​​within each speed sub-range in a data record set to obtain an average value sequence, wherein the average value of vibration values ​​within each speed sub-range in the data record set is collected using the vibration value collection method as described above.

[0062] S202, obtaining the number of wind turbines in the wind farm to obtain a corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines.

[0063] S203, establishing a wind turbine record set, wherein each data record in the wind turbine record set includes at least an average value sequence.

[0064] S204, obtaining IP information of other acquisition devices, and sequentially obtaining corresponding average value sequences according to the IP information of other acquisition devices, and storing them in a wind turbine record set.

[0065] S205: When the number of data records in the wind turbine record set is not less than the number of statistical records, the average value corresponding to each sub-range in the stored average value sequence is calculated to obtain a result sequence.

[0066] S206, obtaining preset reference threshold coefficients, multiplying the result sequences by the reference threshold coefficients respectively to obtain reference threshold sequences, and performing early warning judgment according to the reference threshold sequences.

[0067] That is to say, first, we need to know the total number of wind turbines in the wind farm. This number is a basic parameter of the wind farm and can usually be obtained from the design documents or operation records of the wind farm. Then, according to the number of wind turbines, a predetermined number of statistical records is set. This number of statistical records is an integer between 1 and the number of wind turbines. The following factors need to be considered when selecting the specific value of the number of statistical records: (1) Data representativeness: The number of statistical records should be large enough to ensure that it can represent the operation of the entire wind farm. If the number of statistical records is too small, it may not accurately reflect the overall vibration characteristics of the wind farm. (2) Data processing capacity: At the same time, the number of statistical records cannot be too large, so as not to exceed the computing power and storage capacity of the data processing system. (3) Statistical accuracy: A larger number of statistical records can improve the accuracy of statistical results, but it will also increase the complexity of data processing; then, according to the set number of statistical records, a wind turbine record set is established, which is used to store vibration data collected from different wind turbines; finally, through IP information, in accordance with the Modbus TCP point table method, the register values ​​of other acquisition devices are queried in turn, and new data records are added to the wind turbine record set. When the number of data records in the wind turbine record set reaches the number of statistical records, stop adding new records and start calculating the average value corresponding to each sub-range in the average value sequence for further analysis and calculation of alarm thresholds. In this way, the number of statistical records can be reasonably set according to the number of wind turbines in the wind farm to ensure the accuracy and effectiveness of data collection and analysis.

[0068] Based on the above embodiments, this embodiment provides a possible implementation of a specific method for early warning of vibration values ​​of a wind turbine transmission chain, including the following steps:

[0069] S21, through the modbus tcp point table method, each data record set [C1, C2, ..., C Rnum ]'s Vmean forms a sequence [M1,M2,...,M Rnum ] as a register for other acquisition devices or servers to query.

[0070] S22, according to the number of wind turbines FJ in the wind farm, a predetermined number of statistical records FT, 1<FT≤FJ, a wind turbine record set B is established, each data record in the set B at least contains [M1,M2,...,M Rnum ], the collection device has built-in IP information of FT collection devices.

[0071] S23, through IP information, according to the modbus tcp point table method, query the register values ​​of other acquisition devices [M1, M2, ..., M Rnum], and add a new data record to the fan record set B, and fill in the data obtained by the modbustcp query in the data record.

[0072] S24, when it is determined that the number of data records in the fan record set B reaches FT, calculate M index The average Where index = 1, ..., Rnum, and the calculation result sequence [VM1, VM2, ..., VM Rnum ], fan record set B no longer saves new records.

[0073] S25, preset reference threshold coefficient f>1.0, calculate reference threshold ALARM respectively index =VM index *f, where index = 1,...,Rnum, and obtains the reference threshold sequence [ALARM1,ALARM2,...,ALARM Rnum ] and send the reference threshold sequence to the server.

[0074] In the vibration value warning method for the wind turbine transmission chain of the disclosed embodiment, the alarm reference threshold is obtained by using the average value sequence statistics obtained by the above-mentioned wind turbine transmission chain vibration value collection method, thereby improving the accuracy of vibration value warning.

[0075] In order to implement the above-mentioned embodiment, the embodiment of the present disclosure provides a vibration value collection device for a transmission chain of a wind turbine generator set.

[0076] Figure 3 is a block diagram of a vibration value acquisition device for a wind turbine transmission chain according to an exemplary embodiment. Figure 3 The device includes: a first acquisition module 1, a division module 2, a collection module 3, a rotation speed judgment processing module 4 and a recording storage module 5.

[0077] Among them, the first acquisition module 1 is used to obtain the generator speed range; the division module 2 is used to divide the generator speed range to obtain multiple sub-ranges, and establish a data record set according to the number of sub-ranges; the acquisition module 3 is used to collect instantaneous speed values ​​and vibration data in real time to obtain corresponding speed value sequences and vibration data sequences; the speed judgment processing module 4 is used to determine the stability of the speed according to the speed value sequence; if the stability is unstable, the speed value sequence is discarded; if the stability is stable, the sub-range corresponding to the speed value sequence is determined according to the preset judgment conditions, and the corresponding vibration value is obtained according to the vibration data sequence; the record storage module 5 obtains the corresponding number of data records according to the sub-range corresponding to the speed value sequence, and stores the vibration value to the data record set according to the number of data records and the preset number of records.

[0078] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the vibration value collection method of the wind turbine transmission chain, and will not be elaborated here.

[0079] In order to implement the above-mentioned embodiment, the embodiment of the present disclosure provides a vibration value warning device for a transmission chain of a wind turbine generator set.

[0080] Figure 4 is a block diagram of a vibration value warning device for a wind turbine transmission chain according to an exemplary embodiment. Figure 4 The device includes: a second acquisition module 10, a third acquisition module 20, an establishment module 30, a fourth acquisition module 40, a calculation module 50 and a warning judgment module 60.

[0081] Among them, the second acquisition module 10 is used to obtain the average value of the vibration value in each speed sub-range in the data record set to obtain an average value sequence, wherein the average value of the vibration value in each speed sub-range in the data record set is collected using the vibration value collection method as described above; the third acquisition module 20 is used to obtain the number of wind turbines in the wind farm to obtain the corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines; the establishment module 30 is used to establish a wind turbine record set, and each data record in the wind turbine record set includes at least an average value sequence; the fourth acquisition module 40 is used to obtain the IP information of other acquisition devices to sequentially obtain the corresponding average value sequence according to the IP information of other acquisition devices, and store it in the wind turbine record set; the calculation module 50 is used to calculate the average value corresponding to each sub-range in the stored average value sequence when the number of data records in the wind turbine record set is not less than the statistical record number to obtain a result sequence; the early warning judgment module 60 is used to obtain a preset reference threshold coefficient, multiply the result sequence by the reference threshold coefficient respectively to obtain a reference threshold sequence, and perform an early warning judgment based on the reference threshold sequence.

[0082] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the vibration value early warning method for the wind turbine transmission chain, and will not be elaborated here.

[0083] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0084] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0085] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0086] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0087] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present application may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0088] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0089] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0090] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0091] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0092] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for collecting vibration values ​​of a wind turbine transmission chain, characterized in that: The following steps are involved: Get the generator speed range; Dividing the generator speed range to obtain a plurality of sub-ranges, and establishing a data record set according to the number of the sub-ranges; Collect instantaneous speed value and vibration data in real time to obtain corresponding speed value sequence and vibration data sequence; Determining the stability of the rotation speed according to the rotation speed value sequence; If the stability condition is unstable, the rotation speed value sequence is discarded; if the stability condition is stable, a sub-range corresponding to the rotation speed value sequence is determined according to a preset judgment condition, and a corresponding vibration value is obtained according to the vibration data sequence; The corresponding data record quantity is acquired according to the sub-range corresponding to the rotation speed value sequence, and the vibration value is stored in the data record set according to the data record quantity and a preset record number.

2. The method for collecting vibration values ​​of a wind turbine transmission chain according to claim 1, characterized in that: Determining the stability of the rotation speed according to the rotation speed value sequence includes: Determine the corresponding average value, maximum value and minimum value according to the rotation speed value sequence; If the maximum value and the minimum value are both greater than or equal to the average value minus half of the sub-range interval size and less than or equal to the average value plus half of the sub-range interval size, it is determined that the rotational speed value sequence is stable; otherwise, it is determined that the rotational speed value sequence is unstable.

3. The method for collecting vibration values ​​of a wind turbine transmission chain according to claim 2, characterized in that: Determining the sub-range corresponding to the rotation speed value sequence according to a preset judgment condition includes: It is determined in sequence according to the sub-range sequence number whether the average value satisfies the preset judgment condition. If it does, the sub-range corresponding to the rotation speed value sequence is the sub-range corresponding to the sub-range sequence number, wherein the preset judgment condition is implemented by the following formula: RotaL+(index-1)*Varea≤Rmean <RotaL+index*Varea Among them, RotaL~RotaH represents the generator speed range, index=1,…,Rnum represents the sub-range sequence number, and Varea represents the sub-range interval size.

4. The method for collecting vibration values ​​of a wind turbine transmission chain according to claim 3, characterized in that: Obtain the corresponding vibration value according to the following formula: Where Veffect represents the vibration value, n represents the number of data in the vibration data sequence, and V k Represents the kth vibration data.

5. The method for collecting vibration values ​​of a wind turbine transmission chain according to claim 4, characterized in that: Storing the vibration value in the data record set according to the data record number and the preset record number includes: When the number of data records is less than the preset number of records, a record is added to the data record corresponding to the data record set, and the vibration value is recorded; When the number of data records is not less than the preset number of records, the average value of all vibration values ​​is calculated and the average value is recorded.

6. A vibration value early warning method for a wind turbine transmission chain, characterized in that: The following steps are involved: Obtaining an average value of vibration values ​​within each speed sub-range in the data record set to obtain an average value sequence, wherein the average value of vibration values ​​within each speed sub-range in the data record set is collected using the vibration value collection method described in any one of claims 1 to 5; Obtaining the number of wind turbines in the wind farm to obtain a corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines; Establishing a wind turbine record set, wherein each data record in the wind turbine record set includes at least a mean value sequence; Acquire IP information of other acquisition devices, so as to sequentially acquire corresponding average value sequences according to the IP information of the other acquisition devices, and store them in the wind turbine record set; When the number of data records in the wind turbine record set is not less than the number of statistical records, the average value corresponding to each sub-range in the stored average value sequence is calculated to obtain a result sequence; A preset reference threshold coefficient is obtained, and the result sequence is multiplied by the reference threshold coefficient to obtain a reference threshold sequence, and a warning judgment is performed according to the reference threshold sequence.

7. A vibration value collection device for a wind turbine transmission chain, characterized in that: include: A first acquisition module is used to acquire a generator speed range; A division module, used for dividing the generator speed range to obtain a plurality of sub-ranges, and establishing a data record set according to the number of the sub-ranges; The acquisition module is used to acquire instantaneous speed value and vibration data in real time to obtain corresponding speed value sequence and vibration data sequence; A speed determination processing module, used to determine the stability of the speed according to the speed value sequence; If the stability condition is unstable, the rotation speed value sequence is discarded; if the stability condition is stable, a sub-range corresponding to the rotation speed value sequence is determined according to a preset judgment condition, and a corresponding vibration value is obtained according to the vibration data sequence; The recording and storage module obtains the corresponding number of data records according to the sub-range corresponding to the rotation speed value sequence, and stores the vibration value into the data record set according to the number of data records and a preset number of records.

8. A vibration value warning device for a wind turbine transmission chain, characterized in that: include: A second acquisition module is used to acquire an average value of vibration values ​​in each speed sub-range in the data record set to obtain an average value sequence, wherein the average value of vibration values ​​in each speed sub-range in the data record set is acquired using the vibration value acquisition method according to any one of claims 1 to 5; A third acquisition module is used to acquire the number of wind turbines in the wind farm, so as to obtain a corresponding statistical record number according to the number of wind turbines, wherein the statistical record number is greater than 1 and less than or equal to the number of wind turbines; An establishing module, used for establishing a wind turbine record set, wherein each data record in the wind turbine record set includes at least a mean value sequence; A fourth acquisition module, used to acquire IP information of other acquisition devices, so as to sequentially acquire corresponding average value sequences according to the IP information of the other acquisition devices, and store the sequences in the wind turbine record set; A calculation module, configured to calculate the average value corresponding to each sub-range in the stored average value sequence when the number of data records in the wind turbine record set is not less than the number of statistical records, so as to obtain a result sequence; The early warning judgment module is used to obtain a preset reference threshold coefficient, multiply the result sequence by the reference threshold coefficient to obtain a reference threshold sequence, and perform early warning judgment according to the reference threshold sequence.

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