Wind power generation cable torsion resistance evaluation method and system based on mechanical electromagnetic coupling model

Abstract

The embodiment of the invention discloses a wind power generation cable torsion resistance evaluation method and system based on a mechanical electromagnetic coupling model, and the method comprises the steps: obtaining the mechanical electromagnetic coupling feature information of a wind power generation cable in an actual use process, performing model construction based on the mechanical electromagnetic coupling feature information to obtain a mechanical electromagnetic coupling model, performing simulation action on the to-be-evaluated wind power generation cable based on the mechanical electromagnetic coupling model and the preset action period parameter data, and after a preset number of action periods, performing evaluation on the to-be-evaluated wind power generation cable. And obtaining torsion resistance test data and torsion fatigue resistance data of the to-be-evaluated wind power generation cable output by the mechanical electromagnetic coupling model, and determining a torsion resistance evaluation result of the to-be-evaluated wind power generation cable according to the torsion resistance test data and the torsion fatigue resistance data. According to the scheme, the torsion resistance data of the cable is predicted and evaluated through the mechanical electromagnetic coupling model, and comprehensive, accurate and intelligent evaluation of the torsion resistance of the wind power generation cable can be realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of cable performance evaluation, and in particular, to a method and system for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model. Background Art

[0002] A wind power cable is a cable specifically designed for a wind power generation system, mainly used to connect various components of a wind turbine generator set and transmit electric energy and control signals. The erection environment of a wind power cable is different from that of a conventional cable. During the operation of a wind turbine generator set, the direction needs to be frequently adjusted to capture the best wind energy, which will cause the wind power cable to twist frequently. If the wind power cable does not have excellent torsional resistance performance, it may cause damage to the wind power cable, thereby affecting the normal operation of the wind turbine generator set and increasing the maintenance cost. Therefore, for a wind power cable, the torsional resistance performance is a very important indicator.

[0003] In the related art, most of them evaluate the torsional resistance performance of a wind power cable by twisting the wind power cable multiple times on a torsional test device. However, this method takes a long time and has low accuracy, resulting in low efficiency of torsional resistance performance evaluation and lack of a reasonable and accurate intelligent torsional resistance performance evaluation method. Summary of the Invention

[0004] The embodiments of the present application provide a method and system for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model, which solves the problems in the prior art that the evaluation of the torsional resistance performance of a wind power cable takes a long time and has low accuracy, resulting in low efficiency of torsional resistance performance evaluation and lack of a reasonable and accurate intelligent torsional resistance performance evaluation method, and can realize a comprehensive, accurate and intelligent evaluation of the torsional resistance performance of a wind power cable through the constructed mechanical-electromagnetic coupling model.

[0005] In a first aspect, the embodiments of the present application provide a method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model, including:

[0006] Obtaining the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use;

[0007] Constructing a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information;

[0008] Performing a simulation action on the wind power cable to be evaluated based on the mechanical-electromagnetic coupling model and preset action period parameter data;

[0009] After a preset number of action periods, obtaining the torsional resistance performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model;

[0010] Determine the torsional performance evaluation result of the wind power cable to be evaluated based on the torsional performance test data and the torsional fatigue degree data.

[0011] Optionally, the mechanical-electromagnetic coupling characteristic information includes mechanical characteristic data, electromagnetic characteristic data, and mechanical-electromagnetic coupling terms. The construction of a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information includes:

[0012] Establish the mechanical equilibrium equation of the wind power cable according to the mechanical characteristic data, and establish the electromagnetic field equation of the wind power cable according to the electromagnetic characteristic data;

[0013] Based on the mechanical-electromagnetic coupling terms, perform correlation processing on the mechanical equilibrium equation and the electromagnetic field equation to obtain a mechanical-electromagnetic coupling model.

[0014] Optionally, the preset action period parameter data includes torsional frequency and torsional angle. The simulation of the wind power cable to be evaluated based on the mechanical-electromagnetic coupling model and the preset action period parameter data includes:

[0015] Input the torsional frequency, the torsional angle, and the attribute information associated with the wind power cable to be evaluated into the mechanical-electromagnetic coupling model to simulate the wind power cable to be evaluated. The attribute information includes material data and structural parameter data.

[0016] Optionally, the torsional performance test data includes torsional stiffness and torsional strength under each action period, and the torsional fatigue degree data includes the torsional fatigue degree under each action period. The determination of the torsional performance evaluation result of the wind power cable to be evaluated based on the torsional performance test data and the torsional fatigue degree data includes:

[0017] Calculate the torsional stiffness change rate and the torsional strength change rate respectively according to the torsional stiffness and torsional strength under each action period, and calculate the torsional fatigue degree change rate according to the torsional fatigue degree under each action period;

[0018] Based on the torsional stiffness change rate, the torsional strength change rate, and the torsional fatigue degree change rate, determine the torsional performance evaluation result of the wind power cable to be evaluated.

[0019] Optionally, the determination of the torsional performance evaluation result of the wind power cable to be evaluated based on the torsional stiffness change rate, the torsional strength change rate, and the torsional fatigue degree change rate includes:

[0020] Compare the rate of change of torsional stiffness, the rate of change of torsional strength, and the rate of change of torsional fatigue resistance with the corresponding preset standard values respectively. When the rate of change of torsional stiffness, the rate of change of torsional strength, and the rate of change of torsional fatigue resistance are all less than the corresponding preset standard values, determine that the evaluation result of the torsional performance of the wind power cable to be evaluated is qualified.

[0021] Optionally, the torsional performance test data includes the change amount of torsional stiffness and the change amount of torsional strength, and the torsional fatigue resistance data includes the change amount of torsional fatigue resistance. Determining the evaluation result of the torsional performance of the wind power cable to be evaluated according to the torsional performance test data and the torsional fatigue resistance data includes:

[0022] Determine the comprehensive torsional score of the wind power cable to be evaluated according to the change amount of torsional stiffness, the change amount of torsional strength, and the change amount of torsional fatigue resistance;

[0023] When the comprehensive torsional score is greater than the preset score, determine that the evaluation result of the torsional performance of the wind power cable to be evaluated is qualified.

[0024] Optionally, determining the comprehensive torsional score of the wind power cable to be evaluated according to the change amount of torsional stiffness, the change amount of torsional strength, and the change amount of torsional fatigue resistance includes:

[0025] Multiply the change amount of torsional stiffness, the change amount of torsional strength, and the change amount of torsional fatigue resistance by the corresponding negative score coefficients respectively to obtain the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value;

[0026] Calculate the differences between the preset initial score and the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value respectively to obtain each torsional score to be calculated, and multiply each torsional score to be calculated by the corresponding preset weight and superimpose them to obtain the comprehensive torsional score.

[0027] In a second aspect, an embodiment of the present application further provides a device for evaluating the torsional performance of a wind power cable based on a mechanical and electromagnetic coupling model, including:

[0028] An acquisition module, configured to acquire the mechanical and electromagnetic coupling characteristic information of the wind power cable during actual use;

[0029] A model construction module, configured to construct a mechanical and electromagnetic coupling model based on the mechanical and electromagnetic coupling characteristic information;

[0030] A simulation action module, configured to perform a simulation action on the wind power cable to be evaluated based on the mechanical and electromagnetic coupling model and the preset action period parameter data;

[0031] The obtaining module is further configured to obtain the torsional performance test data and torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model after a preset number of action cycles;

[0032] The evaluation result determination module is configured to determine the torsional performance evaluation result of the to-be-evaluated wind power cable according to the torsional performance test data and the torsional fatigue degree data.

[0033] In a third aspect, an embodiment of the present application further provides a wind power cable torsional performance evaluation device based on a mechanical-electromagnetic coupling model. The device includes:

[0034] One or more processors;

[0035] A storage device for storing one or more programs,

[0036] When the one or more programs are executed by the one or more processors, the one or more processors implement the wind power cable torsional performance evaluation method based on the mechanical-electromagnetic coupling model described in the embodiments of the present application.

[0037] In a fourth aspect, an embodiment of the present application further provides a storage medium storing computer-executable instructions. The computer-executable instructions are used to execute the wind power cable torsional performance evaluation method based on the mechanical-electromagnetic coupling model described in the embodiments of the present application when executed by a computer processor.

[0038] In the embodiments of the present application, the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use is obtained, a mechanical-electromagnetic coupling model is constructed based on the mechanical-electromagnetic coupling characteristic information, the to-be-evaluated wind power cable is simulated based on the mechanical-electromagnetic coupling model and preset action cycle parameter data, after a preset number of action cycles, the torsional performance test data and torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model are obtained, and the torsional performance evaluation result of the to-be-evaluated wind power cable is determined according to the torsional performance test data and the torsional fatigue degree data. This solution predicts and evaluates the torsional performance data of the cable through a mechanical-electromagnetic coupling model, solves the problems in the prior art that the torsional performance evaluation of wind power cables takes a long time and has low accuracy, resulting in low efficiency of torsional performance evaluation and lack of a reasonable and accurate intelligent torsional performance evaluation method, and can realize a comprehensive, accurate and intelligent evaluation of the torsional performance of wind power cables. Description of the Drawings

[0039] Figure 1Flowchart of a method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application;

[0040] Figure 2 Flowchart of another method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application;

[0041] Figure 3 Flowchart of another method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application;

[0042] Figure 4 Flowchart of another method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application;

[0043] Figure 5 Block diagram of the module structure of a device for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application;

[0044] Figure 6 Schematic diagram of the structure of a device for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application. Detailed implementation manners

[0045] The following further elaborates on the embodiments of the present application in conjunction with the accompanying drawings and examples. It can be understood that the specific embodiments described herein are merely used to explain the embodiments of the present application, rather than limiting the embodiments of the present application. Additionally, it should be noted that for the sake of description, only parts related to the embodiments of the present application are shown in the accompanying drawings, rather than all structures.

[0046] Terms such as "first" and "second" in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character "or" generally indicates an "or" relationship between the associated objects before and after.

[0047] The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application can be applied to the scenario of evaluating the torsional resistance performance of wind power cables such as internal cables in a wind farm, transmission cables, and cables in a wind tower. For the method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application, the execution subject of each step can be a computer device, which refers to any electronic device with data calculation, processing, and storage capabilities, such as a mobile phone, a PC (Personal Computer), a tablet computer, and other terminal devices, or a server and other devices. The embodiment of the present application does not make any limitations in this regard.

[0048] Figure 1 It is a flowchart of a method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application. As Figure 1 shown, it specifically includes:

[0049] Step S101: Obtain the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use, and construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information.

[0050] Among them, the mechanical-electromagnetic coupling characteristic information is used to represent the relevant information of the characteristics exhibited by the interaction and mutual influence between the mechanical system and the electromagnetic system of the wind power cable. Using this mechanical-electromagnetic coupling characteristic information, a mechanical-electromagnetic coupling model of the wind power cable can be constructed. The mechanical-electromagnetic coupling model can be a mathematical model that describes the wind power cable being affected by both mechanical and electromagnetic factors in the wind power generation system. Optionally, the mechanical-electromagnetic coupling characteristic information includes sample mechanical parameter data and sample electromagnetic parameter data. One way to construct a mechanical-electromagnetic coupling model is to input the sample mechanical parameter data and the sample electromagnetic parameter data into a deep learning model for training to obtain the mechanical-electromagnetic coupling model. By constructing a mechanical-electromagnetic coupling model through the mechanical-electromagnetic coupling characteristic information of the wind power cable, the accuracy of predicting the torsional resistance performance of the wind power cable can be significantly improved.

[0051] Step S102: Perform a simulated action on the wind power cable to be evaluated based on the mechanical-electromagnetic coupling model and the preset action period parameter data.

[0052] Among them, the preset operating cycle parameter data can be the values of various variable parameters at the operating cycle set in advance. The constructed mechanical-electromagnetic coupling model and the preset operating cycle parameter data can be used to simulate the operation of the wind power cable to be evaluated. The wind power cable to be evaluated is used to represent the wind power cable waiting to be evaluated for torsional resistance performance. Optionally, the preset operating cycle parameter data includes the torsional frequency and the torsional angle. One simulation method can be to input the torsional frequency, the torsional angle, and the attribute information associated with the wind power cable to be evaluated into the mechanical-electromagnetic coupling model to simulate the operation of the wind power cable to be evaluated. The attribute information includes material data and structural parameter data. Among them, the torsional frequency is used to represent the frequency of torsional of the wind power cable. The torsional angle is used to represent the angle formed by the cable during the torsional process. When the wind turbine yaws, the cable will twist accordingly to form a certain angle, and the size of this angle directly affects the stress and wear degree of the cable. The material data can be the material type of the wind power cable, such as material types like copper wire and aluminum wire. The result parameter data can be the numerical values of the various structural parameters of the wind power cable, such as the numerical values of structural parameters like cable diameter and insulation layer thickness.

[0053] In another embodiment, the preset operating cycle parameter data includes the torsional frequency, the torsional angle, and the experimental cycle. One simulation method can be to input the torsional frequency, the torsional angle, the experimental cycle, and the attribute information associated with the wind power cable to be evaluated into the mechanical-electromagnetic coupling model to simulate the operation of the wind power cable to be evaluated. The attribute information includes material data and structural parameter data. The experimental cycle can be the total number of times or the total time of the torsional test of the wind power cable within one operating cycle.

[0054] Step S103, after a preset number of operating cycles, obtain the torsional resistance performance test data and the torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model, and determine the torsional resistance performance evaluation result of the wind power cable to be evaluated according to the torsional resistance performance test data and the torsional fatigue degree data.

[0055] Among them, the preset quantity is used to represent the total value of the preset action cycle, which can be adjusted according to actual needs. After the action cycles of the preset quantity, the torsional performance test data and torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model can be obtained. The torsional performance test data can be the relevant data on the prediction of the torsional performance-related parameters of the wind power cable. The torsional fatigue degree data can be the relevant data on the prediction of the torsional fatigue degree of the wind power cable. Using the torsional performance test data and the torsional fatigue degree data, the torsional performance evaluation result of the to-be-evaluated wind power cable can be determined. Optionally, the torsional performance test data includes the change in torsional stiffness and the change in torsional strength, and the torsional fatigue degree data includes the change in torsional fatigue degree. A way to determine a torsional performance evaluation result can be to compare the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue degree with the corresponding preset standard values respectively. When the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue degree are all less than the corresponding preset standard values, it is determined that the torsional performance evaluation result of the to-be-evaluated wind power cable is qualified. Determining the torsional performance evaluation result of the to-be-evaluated wind power cable through the torsional performance test data and the torsional fatigue degree data of the wind power cable can comprehensively and accurately understand the torsional performance of the wind power cable, provide a scientific basis for the selection, use, and maintenance of the cable, and ensure the reliability and safety of the wind power generation system.

[0056] As can be seen from the above, obtain the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use, construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information, perform a simulation on the to-be-evaluated wind power cable based on the mechanical-electromagnetic coupling model and the preset action cycle parameter data. After the action cycles of the preset quantity, obtain the torsional performance test data and the torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model, and determine the torsional performance evaluation result of the to-be-evaluated wind power cable according to the torsional performance test data and the torsional fatigue degree data. This solution predicts and evaluates the torsional performance data of the cable through the mechanical-electromagnetic coupling model, solves the problems in the prior art that the torsional performance evaluation of wind power cables takes a long time and has low accuracy, resulting in low efficiency of torsional performance evaluation and lack of a reasonable and accurate intelligent torsional performance evaluation method, and can realize a comprehensive, accurate, and intelligent evaluation of the torsional performance of wind power cables.

[0057] Figure 2 The following is a flowchart of another method for evaluating the torsional performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application, which gives an optional specific method for constructing a mechanical-electromagnetic coupling model, as Figure 2 shown, specifically including:

[0058] Step S201: Obtain the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use. Establish the mechanical equilibrium equation of the wind power cable according to the mechanical characteristic data, and establish the electromagnetic field equation of the wind power cable according to the electromagnetic characteristic data. Based on the mechanical-electromagnetic coupling term, perform correlation processing on the mechanical equilibrium equation and the electromagnetic field equation to obtain a mechanical-electromagnetic coupling model.

[0059] Among them, the mechanical-electromagnetic coupling characteristic information includes mechanical characteristic data, electromagnetic characteristic data, and mechanical-electromagnetic coupling terms. The mechanical characteristic data can be the mechanical properties and behavior data shown by the wind power cable when subjected to external forces, such as mechanical characteristic data such as tensile strength, compressive strength, and bending stiffness. Using this mechanical characteristic data, the mechanical equilibrium equation of the wind power cable can be established. The electromagnetic characteristic data is used to characterize the quantitative information of the specific properties and behaviors shown by the wind power cable under the action of an electromagnetic field, such as electromagnetic characteristic data such as conductivity, magnetic permeability, and dielectric constant. Using this electromagnetic characteristic data, the electromagnetic field equation of the wind power cable can be established. The mechanical-electromagnetic coupling term is used to characterize the interaction or influence effect existing between the mechanical and electromagnetic fields of the wind power cable. For example, when the cable is subjected to mechanical stress, its electromagnetic performance changes. Using this mechanical-electromagnetic coupling term, correlation processing can be performed on the mechanical equilibrium equation and the electromagnetic field equation to obtain a mechanical-electromagnetic coupling model.

[0060] Step S202: Based on the mechanical-electromagnetic coupling model and the preset action cycle parameter data, perform a simulation action on the wind power cable to be evaluated.

[0061] Step S203: After a preset number of action cycles, obtain the torsional resistance performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model, and determine the torsional resistance performance evaluation result of the wind power cable to be evaluated according to the torsional resistance performance test data and the torsional fatigue degree data.

[0062] As can be seen from the above, after obtaining the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use, establish the mechanical equilibrium equation of the wind power cable according to the mechanical characteristic data, and establish the electromagnetic field equation of the wind power cable according to the electromagnetic characteristic data. Based on the mechanical-electromagnetic coupling term, perform correlation processing on the mechanical equilibrium equation and the electromagnetic field equation to obtain a mechanical-electromagnetic coupling model. This solution constructs a mechanical-electromagnetic coupling model through the mechanical-electromagnetic coupling characteristic information of the wind power cable, which can significantly improve the accuracy of predicting the torsional resistance performance of the wind power cable.

[0063] Figure 3The flowchart of another method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of this application, which gives an optional specific method for determining the evaluation result of the torsional resistance performance, is as follows Figure 3 shown, specifically including:

[0064] Step S301: Obtain the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use, and construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information.

[0065] Step S302: Perform a simulation action on the wind power cable to be evaluated based on the mechanical-electromagnetic coupling model and the preset action cycle parameter data.

[0066] Step S303: After a preset number of action cycles, obtain the torsional resistance performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model.

[0067] Step S304: Calculate the change rate of torsional stiffness and the change rate of torsional strength respectively according to the torsional stiffness and torsional strength under each action cycle, calculate the change rate of torsional fatigue degree according to the torsional fatigue degree under each action cycle, and determine the evaluation result of the torsional resistance performance of the wind power cable to be evaluated based on the change rate of torsional stiffness, the change rate of torsional strength, and the change rate of torsional fatigue degree.

[0068] Among them, the anti-torsion performance test data include the torsional stiffness and torsional strength in each action cycle. The torsional stiffness is a physical quantity that measures the ability of a wind power cable to resist deformation under torsional external forces, and the torsional strength is a physical quantity that measures the ability of a wind power cable to resist torque without being damaged. The change rate of torsional stiffness and the change rate of torsional strength can be calculated respectively using the torsional stiffness and the torsional strength in each action cycle. The anti-torsion fatigue data include the anti-torsion fatigue in each action cycle. The anti-fatigue degree is a physical quantity that measures the ability of a wind power cable to resist fatigue damage under repeated torsional stresses. The change rate of anti-torsion fatigue can be calculated using the anti-torsion fatigue in each action cycle. Optionally, a determination method can be to compare the change rate of torsional stiffness, the change rate of torsional strength, and the change rate of anti-torsion fatigue with the corresponding preset standard values respectively. When the change rate of torsional stiffness, the change rate of torsional strength, and the change rate of anti-torsion fatigue are all less than the corresponding preset standard values, it is determined that the anti-torsion performance evaluation result of the wind power cable to be evaluated is qualified. An exemplary example can be that after 6 action cycles, the change rate of torsional stiffness of the wind power cable to be evaluated is calculated to be 0.03% / h according to the torsional stiffness in each action cycle, and the change rate of torsional strength is 0.02% / h. The change rate of anti-torsion fatigue of the wind power cable to be evaluated is calculated to be 0.01% / h according to the anti-torsion fatigue in each action cycle. The change rate of torsional stiffness, the change rate of torsional strength, and the change rate of anti-torsion fatigue are respectively 0.1% / h, 0.06% / h, and 0.05% / h with the corresponding preset standard values. The change rate of torsional stiffness, the change rate of torsional strength, and the change rate of anti-torsion fatigue of the wind power cable to be evaluated are all less than the corresponding preset standard values, and it is determined that the anti-torsion performance evaluation result of the wind power cable to be evaluated is qualified. In another embodiment, according to the change rate of torsional stiffness, the change rate of torsional strength, and the change rate of anti-torsion fatigue, the corresponding preset scoring mapping tables are queried to obtain the torsional stiffness score, the torsional strength score, and the anti-torsion fatigue score. The torsional stiffness score, the torsional strength score, and the anti-torsion fatigue score are multiplied by the corresponding preset weights and added together to obtain the comprehensive anti-torsion score of the wind power cable to be evaluated. When the comprehensive anti-torsion score is greater than the preset score, it is determined that the anti-torsion performance evaluation result of the wind power cable to be evaluated is qualified.

[0069] As described above, after obtaining the torsional performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model, the torsional stiffness change rate and the torsional strength change rate are respectively calculated according to the torsional stiffness and torsional strength in each action cycle, and the torsional fatigue degree change rate is calculated according to the torsional fatigue degree in each action cycle. Based on the torsional stiffness change rate, the torsional strength change rate, and the torsional fatigue degree change rate, the torsional performance evaluation result of the wind power cable to be evaluated is determined. This solution determines the torsional performance evaluation result of the wind power cable to be evaluated through the torsional performance test data and torsional fatigue degree data of the wind power cable, and can comprehensively and accurately understand the torsional performance of the wind power cable, providing a scientific basis for the selection, use, and maintenance of the cable, and ensuring the reliability and safety of the wind power system.

[0070] Figure 4 FIG. is a flowchart of another method for evaluating the torsional performance of a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application, which gives another optional specific method for determining the torsional performance evaluation result, such as Figure 4 shown, and specifically includes:

[0071] Step S401, obtain the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use, and construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information.

[0072] Step S402, perform a simulation action on the wind power cable to be evaluated based on the mechanical-electromagnetic coupling model and the preset action cycle parameter data.

[0073] Step S403, after a preset number of action cycles, obtain the torsional performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical-electromagnetic coupling model.

[0074] Step S404, determine the comprehensive torsional score of the wind power cable to be evaluated according to the torsional stiffness change amount, the torsional strength change amount, and the torsional fatigue degree change amount. When the comprehensive torsional score is greater than the preset score, determine that the torsional performance evaluation result of the wind power cable to be evaluated is qualified.

[0075] Among them, the torsional performance test data includes the change in torsional stiffness and the change in torsional strength, and the torsional fatigue data includes the change in torsional fatigue. Optionally, a method for determining a comprehensive torsional score can be to multiply the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue by their corresponding negative score coefficients respectively to obtain the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value. Then calculate the differences between the preset initial score and the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value respectively to obtain each torsional score to be calculated. Multiply each torsional score to be calculated by its corresponding preset weight and sum them up to obtain the comprehensive torsional score. An exemplary example can be that the preset score is 80, the changes in torsional stiffness, torsional strength, and torsional fatigue of the wind power generation cable to be evaluated are 5%, 6%, and 10% in sequence, the negative score coefficients corresponding to the changes in torsional stiffness, torsional strength, and torsional fatigue are 200, 150, and 240 in sequence, the corresponding preset weights are 0.3, 0.2, and 0.5 in sequence, and the preset initial score is 100. Multiply the changes in torsional stiffness, torsional strength, and torsional fatigue by their corresponding negative score coefficients respectively to obtain the torsional stiffness deduction value of 10, the torsional strength deduction value of 9, and the torsional strength deduction value of 24. Calculate the differences between the preset initial score and the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value respectively to obtain each torsional score to be calculated as 90, 91, and 76 respectively. Multiply each torsional score to be calculated by its corresponding preset weight and sum them up to obtain the comprehensive torsional score of 83.2. Since the comprehensive torsional score is greater than the preset score, it is determined that the torsional performance evaluation result of the wind power generation cable to be evaluated is qualified. In another embodiment, query the corresponding preset score mapping table according to the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue to obtain the torsional stiffness score, the torsional strength score, and the torsional fatigue score. Multiply the torsional stiffness score, the torsional strength score, and the torsional fatigue score by their corresponding preset weights and sum them up to obtain the comprehensive torsional score of the wind power generation cable to be evaluated.

[0076] As can be seen from the above, after obtaining the torsional performance test data and torsional fatigue data of the wind power generation cable to be evaluated output by the mechanical and electromagnetic coupling model, determine the comprehensive torsional score of the wind power generation cable to be evaluated according to the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue. When the comprehensive torsional score is greater than the preset score, determine that the torsional performance evaluation result of the wind power generation cable to be evaluated is qualified. This solution can determine the torsional performance evaluation result of the wind power generation cable to be evaluated through the torsional performance test data and torsional fatigue data of the wind power generation cable, comprehensively and accurately understand the torsional performance of the wind power generation cable, provide a scientific basis for the selection, use, and maintenance of the cable, and ensure the reliability and safety of the wind power generation system.

[0077] Figure 5 This is the module structure block diagram of a torsional resistance performance evaluation device for a wind power cable based on a mechanical-electromagnetic coupling model provided by an embodiment of the present application. This system is used to execute the torsional resistance performance evaluation method for a wind power cable based on the mechanical-electromagnetic coupling model provided in the above embodiment, and has the corresponding functional modules and beneficial effects for executing the method. As Figure 5 shown, this system specifically includes:

[0078] An acquisition module 101, configured to acquire the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use;

[0079] A model construction module 102, configured to construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information;

[0080] A simulation action module 103, configured to perform a simulation action on the to-be-evaluated wind power cable based on the mechanical-electromagnetic coupling model and preset action period parameter data;

[0081] The acquisition module 101 is further configured to, after a preset number of action periods, acquire the torsional resistance performance test data and torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model;

[0082] An evaluation result determination module 104, configured to determine the torsional resistance performance evaluation result of the to-be-evaluated wind power cable according to the torsional resistance performance test data and the torsional fatigue degree data.

[0083] As can be seen from the above solution, the mechanical-electromagnetic coupling characteristic information of the wind power cable during actual use is acquired, a mechanical-electromagnetic coupling model is constructed based on the mechanical-electromagnetic coupling characteristic information, a simulation action is performed on the to-be-evaluated wind power cable based on the mechanical-electromagnetic coupling model and preset action period parameter data, after a preset number of action periods, the torsional resistance performance test data and torsional fatigue degree data of the to-be-evaluated wind power cable output by the mechanical-electromagnetic coupling model are acquired, and the torsional resistance performance evaluation result of the to-be-evaluated wind power cable is determined according to the torsional resistance performance test data and the torsional fatigue degree data. This solution predicts and evaluates the torsional resistance performance data of the cable through the mechanical-electromagnetic coupling model, solves the problems in the prior art that the torsional resistance performance evaluation of wind power cables takes a long time and has low accuracy, resulting in low efficiency of torsional resistance performance evaluation and lack of a reasonable and accurate intelligent torsional resistance performance evaluation method, and can realize a comprehensive, accurate and intelligent evaluation of the torsional resistance performance of wind power cables.

[0084] In a possible embodiment, the model construction module 102 is specifically configured to:

[0085] Establish the mechanical equilibrium equation of the wind power cable according to the mechanical property data, and establish the electromagnetic field equation of the wind power cable according to the electromagnetic property data;

[0086] Based on the mechanical-electromagnetic coupling term, perform correlation processing on the mechanical equilibrium equation and the electromagnetic field equation to obtain a mechanical-electromagnetic coupling model.

[0087] In a possible embodiment, the simulation action module 103 is specifically configured to:

[0088] Input the torsional frequency, the torsional angle, and the attribute information associated with the wind power cable to be evaluated into the mechanical-electromagnetic coupling model to perform a simulation action on the wind power cable to be evaluated, where the attribute information includes material data and structural parameter data.

[0089] In a possible embodiment, the evaluation result determination module 104 is specifically configured to:

[0090] Calculate the torsional stiffness change rate and the torsional strength change rate respectively according to the torsional stiffness and the torsional strength in each action period, and calculate the anti-torsion fatigue degree change rate according to the anti-torsion fatigue degree in each action period;

[0091] Determine the anti-torsion performance evaluation result of the wind power cable to be evaluated based on the torsional stiffness change rate, the torsional strength change rate, and the anti-torsion fatigue degree change rate.

[0092] In a possible embodiment, the evaluation result determination module 104 is further configured to:

[0093] Compare the torsional stiffness change rate, the torsional strength change rate, and the anti-torsion fatigue degree change rate with the corresponding preset standard values respectively. When the torsional stiffness change rate, the torsional strength change rate, and the anti-torsion fatigue degree change rate are all less than the corresponding preset standard values, determine that the anti-torsion performance evaluation result of the wind power cable to be evaluated is qualified.

[0094] In a possible embodiment, the evaluation result determination module 104 is further configured to:

[0095] Determine the comprehensive anti-torsion score of the wind power cable to be evaluated according to the torsional stiffness change amount, the torsional strength change amount, and the anti-torsion fatigue degree change amount;

[0096] When the comprehensive anti-torsion score is greater than the preset score, determine that the anti-torsion performance evaluation result of the wind power cable to be evaluated is qualified.

[0097] In a possible embodiment, the evaluation result determination module 104 is further configured to:

[0098] Multiply the torsional stiffness change amount, the torsional strength change amount, and the torsional fatigue resistance change amount by corresponding negative score coefficients respectively to obtain a torsional stiffness deduction value, a torsional strength deduction value, and a torsional strength deduction value;

[0099] Calculate the differences between the preset initial score and the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value respectively to obtain each torsional resistance score to be calculated, multiply each of the torsional resistance scores to be calculated by the corresponding preset weight and superimpose them to obtain a comprehensive torsional resistance score.

[0100] Figure 6 The figure is a schematic structural diagram of a wind power generation cable torsional resistance performance evaluation device provided by an embodiment of the present application. As Figure 6 shown, the device includes a processor 201, a memory 202, an input device 203, and an output device 204; the number of processors 201 in the device can be one or more, Figure 6 Taking one processor 201 as an example; the processor 201, the memory 202, the input device 203, and the output device 204 in the device can be connected through a bus or other means, Figure 6 Taking connection through a bus as an example. The memory 202, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as program instructions or modules corresponding to the wind power generation cable torsional resistance performance evaluation method in the embodiment of the present application. The processor 201 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 202, that is, implements the above-mentioned wind power generation cable torsional resistance performance evaluation method. The input device 203 can be used to receive input digital or character information, and generate key signal inputs related to the user settings and function control of the device. The output device 204 may include a display device such as a display screen.

[0101] An embodiment of the present application also provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a wind power generation cable torsional resistance performance evaluation method based on a mechanical-electromagnetic coupling model when executed by a computer processor. The method includes:

[0102] Obtain the mechanical-electromagnetic coupling characteristic information of the wind power generation cable during actual use;

[0103] Construct a mechanical-electromagnetic coupling model based on the mechanical-electromagnetic coupling characteristic information;

[0104] Perform a simulation on the wind power generation cable to be evaluated based on the mechanical-electromagnetic coupling model and the preset action cycle parameter data;

[0105] After a preset number of action cycles, obtain the anti-torsion performance test data and anti-torsion fatigue degree data of the wind power generation cable to be evaluated output by the mechanical-electromagnetic coupling model;

[0106] Determine the anti-torsion performance evaluation result of the wind power generation cable to be evaluated according to the anti-torsion performance test data and the anti-torsion fatigue degree data.

[0107] It should be noted that in the embodiments of the anti-torsion performance evaluation method system of the wind power generation cable based on the mechanical-electromagnetic coupling model, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the embodiments of the present application.

[0108] Note that the above is only the preferred embodiment of the embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the embodiments of the present application are not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the embodiments of the present application. Therefore, although the embodiments of the present application have been described in more detail through the above embodiments, the embodiments of the present application are not limited to the above embodiments. Without departing from the concept of the embodiments of the present application, more other equivalent embodiments can be included, and the scope of the embodiments of the present application is determined by the scope of the appended claims.

Claims

1. A method for evaluating the torsional resistance performance of a wind power cable based on a mechanical and electromagnetic coupling model, characterized in that The method includes: Obtaining the mechanical and electromagnetic coupling characteristic information of a wind power cable during actual use; Constructing a model based on the mechanical and electromagnetic coupling characteristic information to obtain a mechanical and electromagnetic coupling model; Performing a simulation on the wind power cable to be evaluated based on the mechanical and electromagnetic coupling model and preset action cycle parameter data; After a preset number of action cycles, obtaining the torsional resistance performance test data and torsional fatigue degree data of the wind power cable to be evaluated output by the mechanical and electromagnetic coupling model; Determining the torsional resistance performance evaluation result of the wind power cable to be evaluated according to the torsional resistance performance test data and the torsional fatigue degree data.

2. The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model according to claim 1, wherein The mechanical and electromagnetic coupling characteristic information includes mechanical characteristic data, electromagnetic characteristic data, and mechanical and electromagnetic coupling terms. The constructing a model based on the mechanical and electromagnetic coupling characteristic information to obtain a mechanical and electromagnetic coupling model includes: Establishing the mechanical equilibrium equation of the wind power cable according to the mechanical characteristic data, and establishing the electromagnetic field equation of the wind power cable according to the electromagnetic characteristic data; Performing a correlation process on the mechanical equilibrium equation and the electromagnetic field equation based on the mechanical and electromagnetic coupling terms to obtain a mechanical and electromagnetic coupling model.

3. The method for evaluating the anti-torsion performance of a wind power cable based on a mechanical-electromagnetic coupling model according to claim 1, wherein The preset action cycle parameter data includes a torsional frequency and a torsional angle. The performing a simulation on the wind power cable to be evaluated based on the mechanical and electromagnetic coupling model and preset action cycle parameter data includes: Inputting the torsional frequency, the torsional angle, and the attribute information associated with the wind power cable to be evaluated into the mechanical and electromagnetic coupling model to perform a simulation on the wind power cable to be evaluated, where the attribute information includes material data and structural parameter data.

4. The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model according to any one of claims 1 to 3, characterized in that The torsional resistance performance test data includes the torsional stiffness and torsional strength under each action cycle, and the torsional fatigue degree data includes the torsional fatigue degree under each action cycle. The determining the torsional resistance performance evaluation result of the wind power cable to be evaluated according to the torsional resistance performance test data and the torsional fatigue degree data includes: Calculating the torsional stiffness change rate and torsional strength change rate respectively according to the torsional stiffness and torsional strength under each action cycle, and calculating the torsional fatigue degree change rate according to the torsional fatigue degree under each action cycle; Determining the torsional resistance performance evaluation result of the wind power cable to be evaluated based on the torsional stiffness change rate, torsional strength change rate, and torsional fatigue degree change rate.

5. The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model according to claim 4, characterized in that The determining the torsional resistance performance evaluation result of the wind power cable to be evaluated based on the torsional stiffness change rate, torsional strength change rate, and torsional fatigue degree change rate includes: Comparing the torsional stiffness change rate, torsional strength change rate, and torsional fatigue degree change rate with corresponding preset standard values respectively. When the torsional stiffness change rate, torsional strength change rate, and torsional fatigue degree change rate are all less than the corresponding preset standard values, determining that the torsional resistance performance evaluation result of the wind power cable to be evaluated is qualified.

6. The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model according to any one of claims 1 to 3, characterized in that The torsional performance test data includes the change in torsional stiffness and the change in torsional strength. The torsional fatigue data includes the change in torsional fatigue. Determining the torsional performance evaluation result of the wind power cable to be evaluated based on the torsional performance test data and the torsional fatigue data includes: Determining the comprehensive torsional score of the wind power cable to be evaluated according to the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue; When the comprehensive torsional score is greater than a preset score, determining that the torsional performance evaluation result of the wind power cable to be evaluated is qualified.

7. The method for evaluating the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model according to claim 6, characterized in that, Determining the comprehensive torsional score of the wind power cable to be evaluated according to the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue includes: Multiplying the change in torsional stiffness, the change in torsional strength, and the change in torsional fatigue by corresponding negative score coefficients respectively to obtain a torsional stiffness deduction value, a torsional strength deduction value, and a torsional strength deduction value; Calculating the differences between a preset initial score and the torsional stiffness deduction value, the torsional strength deduction value, and the torsional strength deduction value respectively to obtain each torsional score to be calculated, multiplying each torsional score to be calculated by corresponding preset weights respectively and adding them up to obtain the comprehensive torsional score.

8. A torsional resistance performance evaluation system for a wind power cable based on a mechanical-electromagnetic coupling model, characterized in that, Including: An acquisition module, configured to acquire the mechanical and electromagnetic coupling characteristic information of the wind power cable during actual use; A model construction module, configured to construct a mechanical and electromagnetic coupling model based on the mechanical and electromagnetic coupling characteristic information; A simulation action module, configured to perform a simulation action on the wind power cable to be evaluated based on the mechanical and electromagnetic coupling model and preset action cycle parameter data; The acquisition module is further configured to, after a preset number of action cycles, acquire the torsional performance test data and the torsional fatigue data of the wind power cable to be evaluated output by the mechanical and electromagnetic coupling model; An evaluation result determination module, configured to determine the torsional performance evaluation result of the wind power cable to be evaluated according to the torsional performance test data and the torsional fatigue data.

9. An evaluation device for the torsional resistance performance of a wind power cable based on a mechanical-electromagnetic coupling model, the device comprising: One or more processors; A storage device, configured to store one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the method for evaluating the torsional performance of a wind power cable based on a mechanical and electromagnetic coupling model as described in any one of claims 1-7.

10. A storage medium storing computer-executable instructions, which are used to execute the method for evaluating the torsional performance of a wind power cable based on a mechanical and electromagnetic coupling model as described in any one of claims 1-7 when executed by a computer processor.

Images