Low-latency uninterrupted communication method for wind turbines based on wireless and wired integration

Abstract

The present invention discloses a low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired communication, which relates to the field of communication technology and includes: forming a communication identification area based on a characteristic position and a target position; obtaining an identification result of the communication identification area, and obtaining a node unit and a non-node unit; forming a preliminary communication link from the wind turbine to the characteristic position; obtaining at least one preliminary communication link to be regulated, and using the preliminary communication link to be regulated as a characteristic communication link; analyzing and obtaining at least one abnormal path; and obtaining a target communication link. By forming a communication identification area, identifying weather and terrain interference in the communication identification area, forming a preliminary communication link, and correcting the characteristic communication link, it is ensured that the signal attenuation and delay are acceptable. At the same time, according to the change of the magnetic field, it is necessary to locally correct the preliminary communication link with abnormalities, thereby ensuring that the communication quality meets the requirements.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired communication. Background Art

[0002] With the continuous advancement of technology, wind power generation has become a vital component of the global energy sector. However, traditional wind power generation methods have many limitations in practical application, such as remote locations and unstable communication signals. Wind power generation requires real-time monitoring to promptly detect potential faults. Unstable communication signals can easily lead to unstable monitoring and high latency. To address these issues, an increasing number of wind power companies are beginning to explore the use of wireless and wired remote monitoring solutions for wind power generation. The main reasons for not adopting a fully wired approach are cost and construction difficulties.

[0003] However, the terrain and weather conditions between wind turbines and monitoring equipment are complex, making it difficult to determine signal stability and delay, making it impossible to accurately switch between wireless and wired communications and select communication paths. Summary of the Invention

[0004] In order to solve the above technical problems, a low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0006] The low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired communication includes:

[0007] Obtaining the location of at least one wind turbine generator set as a target location, obtaining a wired communication path between two of the wind turbine generator sets, and aggregating the paths to form a wired connection network;

[0008] Obtaining the location of a device for monitoring the wind turbine as a characteristic location, and forming a communication identification area based on the characteristic location and the target location;

[0009] Identify weather and terrain interference in the communication identification area, obtain identification results of the communication identification area, and classify wind turbines according to the identification results to obtain node turbines and non-node turbines;

[0010] According to the node units and non-node units, a preliminary communication link is formed from the wind turbine unit to the characteristic position, and the preliminary communication link is used to perform integrated communication for the wind turbine unit;

[0011] In the converged communication process, the signal strength of the end of the preliminary communication link is analyzed to obtain at least one preliminary communication link to be regulated, and the preliminary communication link to be regulated is used as a characteristic communication link;

[0012] Based on the characteristic communication link, at least one abnormal path is obtained by analysis;

[0013] Based on the abnormal path, the characteristic communication link is corrected to obtain the target communication link, and the wind turbine is communicated to the characteristic position according to the target communication link.

[0014] Preferably, the obtaining of the wired communication path between the two wind turbines and aggregating the wired communication path to form a wired connection network comprises the following steps:

[0015] If there is an optical fiber connected between the two wind turbines, the optical fiber between the two wind turbines will be used as a wired communication path; otherwise, the connection between the two wind turbines will be disconnected.

[0016] The distribution of wired communication paths is summarized to form a wired connection network.

[0017] Preferably, forming a communication identification area based on the characteristic position and the target position includes the following steps:

[0018] Acquire at least one historical transmission path of a wireless signal between a target position and a characteristic position, and use a line segment connecting the characteristic position and the target position as a characteristic line segment;

[0019] At least one sampling point is evenly selected on the historical transmission path, the maximum value of the distance from the sampling point to the characteristic line segment is used as the characteristic distance, and four times the characteristic distance is used as the preset distance;

[0020] The area passed by the characteristic line segment is used as the communication identification area. The width of the communication identification area is the preset distance, and the characteristic line segment is the center line of the communication identification area.

[0021] Preferably, the identifying of weather and terrain interference in the communication identification area to obtain an identification result of the communication identification area includes the following steps:

[0022] Obtain the allowable delay of wind turbine communication, multiply the allowable delay by the speed of light to obtain the allowable distance, and subtract the length of the characteristic line segment corresponding to the communication identification area from the allowable distance to obtain the redundant distance;

[0023] Obtaining the height of the wind turbine when transmitting signals as a characteristic height, and identifying at least one obstruction area within the communication identification area, where the obstruction area is an area where the obstacle is higher than the characteristic height;

[0024] Performing three-dimensional modeling on obstacles in the obstruction area to obtain a three-dimensional obstacle model;

[0025] An initial direction is formed, the initial direction extends along the direction of the characteristic line segment, and the height of the initial direction is the characteristic height;

[0026] In the three-dimensional obstacle model, according to the reflection mechanism, simulate at least one reflection path of the signal along the initial direction to leave the obstruction area, and take the reflection path with the terminal direction equal to the direction of the characteristic line segment as the target reflection path. The reflection mechanism is that the reflection angle is equal to the incident angle.

[0027] The length of at least one target reflection path within the communication identification area is accumulated to obtain a judgment value. When the judgment value is greater than the redundant distance, the terrain interference within the communication identification area cannot be ignored. Otherwise, the terrain interference within the communication identification area can be ignored.

[0028] Identify at least one area in the communication identification area where the magnetic field frequency is close to the communication frequency of the wind turbine generator set as a magnetic field interference area;

[0029] In historical communication data, a range of values ​​of the integrated magnetic field intensity in the magnetic field interference area is obtained as a feature range, and the feature range is divided into equal intervals to obtain at least one identification point. The integrated magnetic field intensity is the product of the area of ​​the magnetic field interference area and the magnetic field intensity;

[0030] A sample area is formed, and under the condition that the comprehensive magnetic field intensity of the sample area is the value at the identification point, the retention ratio of the communication signal after passing through the sample area is obtained, and the identification point and the retention ratio are paired and fitted to obtain an interference fitting function;

[0031] Multiply the area of ​​the magnetic field interference region by the actual magnetic field intensity to obtain the actual interference value, and substitute the actual interference value into the interference fitting function to obtain the retained actual proportion;

[0032] Multiply at least one actual retention ratio in the communication identification area to obtain the total retention ratio, multiply the total retention ratio by the strength of the wind turbine communication signal to obtain the communication retention strength, and obtain the minimum recognition strength of the signal based on the historical recognition situation. When the communication retention strength is less than the minimum recognition strength, the weather interference in the communication identification area cannot be ignored; otherwise, the weather interference in the communication identification area can be ignored.

[0033] Preferably, identifying at least one area having a magnetic field frequency close to the communication frequency of the wind turbine generator set within the communication identification area as the magnetic field interference area comprises the following steps:

[0034] Acquire at least one sample magnetic field, and if the wind turbine communication signal attenuates after passing through the area where the sample magnetic field is located, use the frequency of the sample magnetic field as the characteristic frequency;

[0035] Subtract the characteristic frequency from the communication frequency of the wind turbine to obtain a frequency difference, and take the maximum value of the frequency difference as the frequency critical value;

[0036] When the difference between the magnetic field frequency and the wind turbine communication frequency is less than the frequency critical value, the magnetic field frequency and the wind turbine communication frequency are close.

[0037] Preferably, classifying the wind turbines according to the identification results comprises the following steps:

[0038] When the interference in the communication identification area cannot be ignored, the wind turbines located in the communication identification area are regarded as non-node units;

[0039] When the interference in the communication identification area can be ignored, the wind turbines located in the communication identification area are regarded as node units.

[0040] Preferably, forming a preliminary communication link from the wind turbine to the characteristic location based on the node turbines and the non-node turbines comprises the following steps:

[0041] When the wind turbine is a node unit, the initial communication link from the wind turbine to the characteristic position is the line segment connecting the wind turbine and the characteristic position;

[0042] When the wind turbine is a non-node unit, the node unit with the smallest distance to the wind turbine is used as the target node unit;

[0043] The remaining wind turbines between the wind turbines and the target node turbines are taken as target wind turbines;

[0044] Identify at least one signal interference area between the wind turbine generator set and the target node generator set;

[0045] forming at least one backup path between the wind turbine group and the target node group, wherein the backup path passes through several of the target wind turbine groups;

[0046] When there is a signal interference area between adjacent target node units in the backup path, the adjacent target node units in the signal interference area are paired as a unit combination to be verified;

[0047] If there are wired communication paths between the target node units in the unit combination to be verified in the backup path, the backup path is used as the alternative path, and the shortest alternative path is used as the target path;

[0048] The target path and the connection line from the target node unit to the characteristic position are used as the preliminary communication link. In the preliminary communication link, the path between the target node units in the unit combination to be verified uses wired signal transmission, and the rest of the preliminary communication link uses wireless signal transmission.

[0049] Preferably, analyzing the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated comprises the following steps:

[0050] Real-time statistics are generated on the signal strength at the end of the preliminary communication link, and a time-dependent image of the signal strength at the end of the preliminary communication link is generated. The image of the signal strength relative to time is fitted to obtain a time-consuming prediction function.

[0051] The first-order derivative of the time-consuming prediction function is used as the characteristic function;

[0052] When the difference between the signal strength at the end of the preliminary communication link and the minimum identification strength of the signal is less than the measurement allowable error and the characteristic function is less than 0, the preliminary communication link is taken as to be regulated.

[0053] Preferably, the step of analyzing and obtaining at least one abnormal path based on the characteristic communication link comprises the following steps:

[0054] Statistically calculating a drop in signal strength at the end of the characteristic communication link as a characteristic amplitude;

[0055] Summarize the characteristic communication links with consistent characteristic amplitudes into a characteristic communication link set;

[0056] An intersection of the characteristic communication links in the characteristic communication link set is taken to obtain at least one abnormal path.

[0057] Preferably, the step of correcting the characteristic communication link to obtain the target communication link comprises the following steps:

[0058] The wind turbine located at the endpoint of the abnormal path is used as the benchmark wind turbine;

[0059] Obtain wind turbines that are not on the straight line of the abnormal path as transfer wind turbines;

[0060] The transfer wind turbines that do not interfere with the reference wind turbines are selected as candidate wind turbines, and the candidate wind turbines with the smallest sum of distances to the reference wind turbines are selected as the final wind turbines;

[0061] The path connecting the final wind turbines to the two end points of the abnormal path is used as the correction path;

[0062] The abnormal path in the characteristic communication link is replaced by the corrected path to obtain the target communication link.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] By forming a communication identification area, identifying weather and terrain interference in the communication identification area, forming a preliminary communication link and correcting the characteristic communication link, the terrain and weather conditions between the wind turbine and the monitoring equipment can be accurately analyzed to determine their impact on signal delay and attenuation. According to the different impacts, the communication path is selected to ensure that the signal attenuation and delay are acceptable. At the same time, since the magnetic field in different areas will change over time, the preliminary communication link may not meet the needs. Therefore, it is necessary to locally correct the preliminary communication link with abnormalities to ensure that the communication quality meets the needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 Schematic diagram of the flow of the low-latency uninterrupted communication method for wind turbines based on wireless and wired integration of the present invention;

[0066] Figure 2 A schematic diagram of a process for obtaining a wired communication path between two wind turbines and forming a wired connection network according to the present invention;

[0067] Figure 3 A schematic diagram of a process for forming a communication identification zone based on a characteristic position and a target position of the present invention;

[0068] Figure 4 A schematic diagram of a process for identifying weather and terrain interference in a communication identification area and obtaining an identification result of the communication identification area according to the present invention;

[0069] Figure 5 This is a flow chart of identifying at least one region having a magnetic field frequency close to the communication frequency of a wind turbine generator set within a communication identification area as a magnetic field interference region according to the present invention;

[0070] Figure 6 This is a schematic diagram of a process for classifying wind turbines according to the identification results of the present invention;

[0071] Figure 7 A schematic diagram of a process for forming a preliminary communication link from a wind turbine to a characteristic location based on node turbines and non-node turbines according to the present invention;

[0072] Figure 8 A schematic diagram of a process for analyzing the signal strength at the end of a preliminary communication link to obtain at least one preliminary communication link to be regulated according to the present invention;

[0073] Figure 9 A schematic diagram of a process of analyzing and obtaining at least one abnormal path based on a characteristic communication link according to the present invention;

[0074] Figure 10The present invention provides a flow chart of modifying a characteristic communication link to obtain a target communication link. DETAILED DESCRIPTION

[0075] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0076] Reference Figure 1 As shown, the low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired communication includes:

[0077] Obtaining the location of at least one wind turbine generator set as a target location, obtaining a wired communication path between two of the wind turbine generator sets, and aggregating the paths to form a wired connection network;

[0078] Obtaining the location of a device for monitoring the wind turbine as a characteristic location, and forming a communication identification area based on the characteristic location and the target location;

[0079] Identify weather and terrain interference in the communication identification area, obtain identification results of the communication identification area, and classify wind turbines according to the identification results to obtain node turbines and non-node turbines;

[0080] According to the node units and non-node units, a preliminary communication link is formed from the wind turbine unit to the characteristic position, and the preliminary communication link is used to perform integrated communication for the wind turbine unit;

[0081] In the converged communication process, the signal strength of the end of the preliminary communication link is analyzed to obtain at least one preliminary communication link to be regulated, and the preliminary communication link to be regulated is used as a characteristic communication link;

[0082] Based on the characteristic communication link, at least one abnormal path is obtained by analysis;

[0083] Based on the abnormal path, the characteristic communication link is corrected to obtain the target communication link, and the wind turbine is communicated to the characteristic position according to the target communication link.

[0084] Wind turbines are usually located at sea or on land. On land, there may be mountains that block the signal. Therefore, the signal can only pass through the mountains through the gaps between the mountains by reflection. However, since the mountains may cover a large area, the reflection path may be very long, which will cause a more obvious delay. Therefore, this situation needs to be handled. In addition, since there are many wind turbines, their overall area is large, and the weather in different locations is different, and there are thunderstorms and other situations. The magnetic field interference generated will weaken the signal, resulting in the signal being unrecognizable. Therefore, the signal transmission path needs to be adjusted. When performing magnetic field interference analysis, it should be noted that only magnetic fields with frequencies close to the communication signal will cause signal interference, and interference with a large frequency difference will not affect the communication signal. Taking the above situation into consideration, a series of steps are set up in the subsequent process to handle the above situation.

[0085] Reference Figure 2 As shown, obtaining the wired communication path between the two wind turbines and aggregating to form a wired connection network includes the following steps:

[0086] If there is an optical fiber connected between the two wind turbines, the optical fiber between the two wind turbines will be used as a wired communication path; otherwise, the connection between the two wind turbines will be disconnected.

[0087] The distribution of wired communication paths is summarized to form a wired connection network.

[0088] Reference Figure 3 As shown, forming a communication identification area based on the characteristic position and the target position includes the following steps:

[0089] Acquire at least one historical transmission path of a wireless signal between a target position and a characteristic position, and use a line segment connecting the characteristic position and the target position as a characteristic line segment;

[0090] At least one sampling point is evenly selected on the historical transmission path, the maximum value of the distance from the sampling point to the characteristic line segment is used as the characteristic distance, and four times the characteristic distance is used as the preset distance;

[0091] The area passed by the characteristic line segment is used as the communication identification area. The width of the communication identification area is the preset distance, and the characteristic line segment is the center line of the communication identification area.

[0092] There may be reflected transmission in the historical transmission path. Therefore, it may be a broken line, not overlapping with the characteristic line segment, and may be partially on the left side of the characteristic line segment, or partially on the right side of the characteristic line segment. A communication identification area needs to be formed to ensure that subsequent communication paths are all in the communication identification area. Therefore, based on the identification of weather and terrain in the communication identification area, it can be determined whether the communication identification area meets the transmission requirements. When it does not meet the requirements, the transmission path can be changed. Using twice the characteristic distance as the width of the communication identification area can cover the transmission path in most cases. However, in order to avoid sudden changes in the transmission path caused by uncontrollable factors, 4 times the characteristic distance is used as the width of the communication identification area. In this way, it can be ensured that the communication path from the wind turbine to the monitored equipment is included in the communication identification area. Therefore, the environment of the communication path can be identified, and the communication path can be corrected according to the environmental conditions.

[0093] Reference Figure 4 As shown, identifying weather and terrain interference in a communication identification area and obtaining an identification result of the communication identification area includes the following steps:

[0094] Obtain the allowable delay of wind turbine communication, multiply the allowable delay by the speed of light to obtain the allowable distance, and subtract the length of the characteristic line segment corresponding to the communication identification area from the allowable distance to obtain the redundant distance;

[0095] Obtaining the height of the wind turbine when transmitting signals as a characteristic height, and identifying at least one obstruction area within the communication identification area, where the obstruction area is an area where the obstacle is higher than the characteristic height;

[0096] Performing three-dimensional modeling on obstacles in the obstruction area to obtain a three-dimensional obstacle model;

[0097] An initial direction is formed, the initial direction extends along the direction of the characteristic line segment, and the height of the initial direction is the characteristic height;

[0098] In the three-dimensional obstacle model, according to the reflection mechanism, simulate at least one reflection path of the signal along the initial direction to leave the obstruction area, and take the reflection path with the terminal direction equal to the direction of the characteristic line segment as the target reflection path. The reflection mechanism is that the reflection angle is equal to the incident angle.

[0099] The length of at least one target reflection path within the communication identification area is accumulated to obtain a judgment value. When the judgment value is greater than the redundant distance, the terrain interference within the communication identification area cannot be ignored. Otherwise, the terrain interference within the communication identification area can be ignored.

[0100] Identify at least one area in the communication identification area where the magnetic field frequency is close to the communication frequency of the wind turbine generator set as a magnetic field interference area;

[0101] In historical communication data, a range of values ​​of the integrated magnetic field intensity in the magnetic field interference area is obtained as a feature range, and the feature range is divided into equal intervals to obtain at least one identification point. The integrated magnetic field intensity is the product of the area of ​​the magnetic field interference area and the magnetic field intensity;

[0102] A sample area is formed, and under the condition that the comprehensive magnetic field intensity of the sample area is the value at the identification point, the retention ratio of the communication signal after passing through the sample area is obtained, and the identification point and the retention ratio are paired and fitted to obtain an interference fitting function;

[0103] Multiply the area of ​​the magnetic field interference region by the actual magnetic field intensity to obtain the actual interference value, and substitute the actual interference value into the interference fitting function to obtain the retained actual proportion;

[0104] Multiply at least one actual retention ratio in the communication identification area to obtain the total retention ratio, multiply the total retention ratio by the strength of the wind turbine communication signal to obtain the communication retention strength, and obtain the minimum recognition strength of the signal based on the historical recognition situation. When the communication retention strength is less than the minimum recognition strength, the weather interference in the communication identification area cannot be ignored; otherwise, the weather interference in the communication identification area can be ignored.

[0105] Identification is mainly carried out from two aspects: delay and signal attenuation. Delay is mainly caused by the obstruction of obstacles. In order to pass through obstacles, the signal usually undergoes multiple reflections and passes through the gaps in the obstacles. However, since the obstacles may be very large objects, the distance of multiple reflections may be very long, resulting in increased transmission time, which will lead to significant delay. Therefore, it is necessary to change the transmission path. During reflection, since the terrain can be modeled in advance, the reflection path can be predicted based on the signal reflection mechanism, thereby obtaining the reflection distance and time, and then making a judgment;

[0106] In addition, thunderstorms and magnetic fields generated in different locations may affect communication signals. Using sample areas, we model the impact and predict the actual situation based on the modeling results. In this way, we can predict the attenuation effect of the communication identification area on the signal.

[0107] Reference Figure 5 As shown, identifying at least one area with a magnetic field frequency close to the communication frequency of the wind turbine generator set in the communication identification area as a magnetic field interference area includes the following steps:

[0108] Acquire at least one sample magnetic field, and if the wind turbine communication signal attenuates after passing through the area where the sample magnetic field is located, use the frequency of the sample magnetic field as the characteristic frequency;

[0109] Subtract the characteristic frequency from the communication frequency of the wind turbine to obtain a frequency difference, and take the maximum value of the frequency difference as the frequency critical value;

[0110] When the difference between the magnetic field frequency and the wind turbine communication frequency is less than the frequency critical value, the magnetic field frequency and the wind turbine communication frequency are close.

[0111] Here, we form a judgment basis for similar frequencies to estimate interference. Interferences of the same or similar frequencies will produce resonance, but different phases will lead to mutual cancellation. However, signals with large frequency differences will not affect each other, so they do not need to be considered.

[0112] Reference Figure 6 As shown in FIG, based on the identification results, classifying the wind turbines includes the following steps:

[0113] When the interference in the communication identification area cannot be ignored, the wind turbines located in the communication identification area are regarded as non-node units;

[0114] When the interference in the communication identification area can be ignored, the wind turbines located in the communication identification area are regarded as node units.

[0115] Reference Figure 7 As shown, according to the node units and non-node units, forming a preliminary communication link from the wind turbine to the characteristic location includes the following steps:

[0116] When the wind turbine is a node unit, the initial communication link from the wind turbine to the characteristic position is the line segment connecting the wind turbine and the characteristic position;

[0117] When the wind turbine is a non-node unit, the node unit with the smallest distance to the wind turbine is used as the target node unit;

[0118] The remaining wind turbines between the wind turbines and the target node turbines are taken as target wind turbines;

[0119] Identify at least one signal interference area between the wind turbine generator set and the target node generator set;

[0120] forming at least one backup path between the wind turbine group and the target node group, wherein the backup path passes through several of the target wind turbine groups;

[0121] When there is a signal interference area between adjacent target node units in the backup path, the adjacent target node units in the signal interference area are paired as a unit combination to be verified;

[0122] If there are wired communication paths between the target node units in the unit combination to be verified in the backup path, the backup path is used as the alternative path, and the shortest alternative path is used as the target path;

[0123] The target path and the connection line from the target node unit to the characteristic position are used as the preliminary communication link. In the preliminary communication link, the path between the target node units in the unit combination to be verified uses wired signal transmission, and the rest of the preliminary communication link uses wireless signal transmission.

[0124] According to the classification of wind turbines, the communication identification zone of the node unit does not affect communication. Therefore, the node unit communicates directly to the characteristic position. However, the communication identification zone of the non-node unit does affect communication. Therefore, an alternative path needs to be formed for communication, mainly through the non-node unit to the node unit as a transit point for transmission. However, since there may be interference in the path from the non-node unit to the node unit, due to the existence of optical fiber, interference can be avoided through the fusion of wired and wireless methods.

[0125] Reference Figure 8 As shown, analyzing the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated includes the following steps:

[0126] Real-time statistics are generated on the signal strength at the end of the preliminary communication link, and a time-dependent image of the signal strength at the end of the preliminary communication link is generated. The image of the signal strength relative to time is fitted to obtain a time-consuming prediction function.

[0127] The first-order derivative of the time-consuming prediction function is used as the characteristic function;

[0128] When the difference between the signal strength at the end of the preliminary communication link and the minimum identification strength of the signal is less than the measurement allowable error and the characteristic function is less than 0, the preliminary communication link is taken as to be regulated.

[0129] During communication, the magnetic field may change, which may cause transmission abnormalities in some preliminary communication links. Therefore, it is necessary to fine-tune the preliminary communication links with abnormalities. The same abnormality has the same impact on the characteristic communication links. Therefore, the characteristic communication links are classified according to the characteristic amplitude. The classification is based on the consistency of the abnormality. Since the abnormalities of the characteristic communication links in the characteristic communication link set are consistent, the abnormal path can be obtained by taking the intersection of the characteristic communication links in the characteristic communication link set, and then the abnormal path can be corrected.

[0130] Reference Figure 9 As shown, based on the characteristic communication link, analyzing and obtaining at least one abnormal path includes the following steps:

[0131] Statistically calculating a drop in signal strength at the end of the characteristic communication link as a characteristic amplitude;

[0132] Summarize the characteristic communication links with consistent characteristic amplitudes into a characteristic communication link set;

[0133] An intersection of the characteristic communication links in the characteristic communication link set is taken to obtain at least one abnormal path.

[0134] Reference Figure 10 As shown, correcting the characteristic communication link to obtain the target communication link includes the following steps:

[0135] The wind turbine located at the endpoint of the abnormal path is used as the benchmark wind turbine;

[0136] Obtain wind turbines that are not on the straight line of the abnormal path as transfer wind turbines;

[0137] The transfer wind turbines that do not interfere with the reference wind turbines are selected as candidate wind turbines, and the candidate wind turbines with the smallest sum of distances to the reference wind turbines are selected as the final wind turbines;

[0138] The path connecting the final wind turbines to the two end points of the abnormal path is used as the correction path;

[0139] The abnormal path in the characteristic communication link is replaced by the corrected path to obtain the target communication link.

[0140] Furthermore, the present solution also proposes a storage medium on which a computer-readable program is stored. When the computer-readable program is called, it executes the above-mentioned low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired.

[0141] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state disk (SSD).

[0142] To sum up, the advantages of the present invention are: by forming a communication identification area, identifying weather and terrain interference in the communication identification area, forming a preliminary communication link and correcting the characteristic communication link, the terrain and weather conditions between the wind turbine and the monitoring equipment can be accurately analyzed, and then the impact on the signal delay and attenuation can be determined. According to the different impacts, the communication path is selected to ensure that the signal attenuation and delay are acceptable. At the same time, since the magnetic field in different areas will change over time, the preliminary communication link may not meet the requirements. Therefore, it is necessary to locally correct the preliminary communication link with abnormalities to ensure that the communication quality meets the requirements.

[0143] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-latency uninterrupted communication method for wind turbines based on the integration of wireless and wired communication, characterized in that: include: Obtaining the location of at least one wind turbine generator set as a target location, obtaining a wired communication path between two of the wind turbine generator sets, and aggregating the paths to form a wired connection network; Obtaining the location of a device for monitoring the wind turbine as a characteristic location, and forming a communication identification area based on the characteristic location and the target location; Identify weather and terrain interference in the communication identification area, obtain identification results of the communication identification area, and classify wind turbines according to the identification results to obtain node turbines and non-node turbines; According to the node units and non-node units, a preliminary communication link is formed from the wind turbine unit to the characteristic position, and the preliminary communication link is used to perform integrated communication for the wind turbine unit; In the converged communication process, the signal strength of the end of the preliminary communication link is analyzed to obtain at least one preliminary communication link to be regulated, and the preliminary communication link to be regulated is used as a characteristic communication link; Based on the characteristic communication link, at least one abnormal path is obtained by analysis; Based on the abnormal path, the characteristic communication link is corrected to obtain the target communication link, and the wind turbine is communicated to the characteristic position according to the target communication link; The forming of a preliminary communication link from the wind turbine to the characteristic location based on the node turbines and the non-node turbines comprises the following steps: When the wind turbine is a node unit, the initial communication link from the wind turbine to the characteristic position is the line segment connecting the wind turbine and the characteristic position; When the wind turbine is a non-node unit, the node unit with the smallest distance to the wind turbine is used as the target node unit; The remaining wind turbines between the wind turbines and the target node turbines are taken as target wind turbines; Identify at least one signal interference area between the wind turbine generator set and the target node generator set; forming at least one backup path between the wind turbine group and the target node group, wherein the backup path passes through several of the target wind turbine groups; When there is a signal interference area between adjacent target node units in the backup path, the adjacent target node units in the signal interference area are paired as a unit combination to be verified; If there are wired communication paths between the target node units in the unit combination to be verified in the backup path, the backup path is used as the alternative path, and the shortest alternative path is used as the target path; The target path and the connection line from the target node unit to the characteristic position are used as the preliminary communication link. In the preliminary communication link, the path between the target node units in the unit combination to be verified uses wired signal transmission, and the rest of the preliminary communication link uses wireless signal transmission.

2. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 1 is characterized in that: The obtaining of the wired communication path between the two wind turbines and forming a wired connection network comprises the following steps: If there is an optical fiber connected between the two wind turbines, the optical fiber between the two wind turbines will be used as a wired communication path; otherwise, the connection between the two wind turbines will be disconnected. The distribution of wired communication paths is summarized to form a wired connection network.

3. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 2 is characterized in that: The forming of the communication identification area based on the characteristic position and the target position comprises the following steps: Acquire at least one historical transmission path of a wireless signal between a target position and a characteristic position, and use a line segment connecting the characteristic position and the target position as a characteristic line segment; At least one sampling point is evenly selected on the historical transmission path, the maximum value of the distance from the sampling point to the characteristic line segment is used as the characteristic distance, and four times the characteristic distance is used as the preset distance; The area passed by the characteristic line segment is used as the communication identification area. The width of the communication identification area is the preset distance, and the characteristic line segment is the center line of the communication identification area.

4. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 3 is characterized in that: The identifying of weather and terrain interference in the communication identification area to obtain an identification result of the communication identification area includes the following steps: Obtain the allowable delay of wind turbine communication, multiply the allowable delay by the speed of light to obtain the allowable distance, and subtract the length of the characteristic line segment corresponding to the communication identification area from the allowable distance to obtain the redundant distance; Obtaining the height of the wind turbine when transmitting signals as a characteristic height, and identifying at least one obstruction area within the communication identification area, where the obstruction area is an area where the obstacle is higher than the characteristic height; Performing three-dimensional modeling on obstacles in the obstruction area to obtain a three-dimensional obstacle model; An initial direction is formed, the initial direction extends along the direction of the characteristic line segment, and the height of the initial direction is the characteristic height; In the three-dimensional obstacle model, according to the reflection mechanism, simulate at least one reflection path of the signal along the initial direction to leave the obstruction area, and take the reflection path with the terminal direction equal to the direction of the characteristic line segment as the target reflection path. The reflection mechanism is that the reflection angle is equal to the incident angle. The length of at least one target reflection path within the communication identification area is accumulated to obtain a judgment value. When the judgment value is greater than the redundant distance, the terrain interference within the communication identification area cannot be ignored. Otherwise, the terrain interference within the communication identification area can be ignored. Identify at least one area in the communication identification area where the magnetic field frequency is close to the communication frequency of the wind turbine generator set as a magnetic field interference area; In historical communication data, a range of values ​​of the integrated magnetic field intensity in the magnetic field interference area is obtained as a feature range, and the feature range is divided into equal intervals to obtain at least one identification point. The integrated magnetic field intensity is the product of the area of ​​the magnetic field interference area and the magnetic field intensity; A sample area is formed, and under the condition that the comprehensive magnetic field intensity of the sample area is the value at the identification point, the retention ratio of the communication signal after passing through the sample area is obtained, and the identification point and the retention ratio are paired and fitted to obtain an interference fitting function; Multiply the area of ​​the magnetic field interference region by the actual magnetic field intensity to obtain the actual interference value, and substitute the actual interference value into the interference fitting function to obtain the retained actual proportion; Multiply at least one actual retention ratio in the communication identification area to obtain the total retention ratio, multiply the total retention ratio by the strength of the wind turbine communication signal to obtain the communication retention strength, and obtain the minimum recognition strength of the signal based on the historical recognition situation. When the communication retention strength is less than the minimum recognition strength, the weather interference in the communication identification area cannot be ignored; otherwise, the weather interference in the communication identification area can be ignored.

5. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 4 is characterized in that: The step of identifying at least one area having a magnetic field frequency close to the communication frequency of the wind turbine generator set within the communication identification area as a magnetic field interference area comprises the following steps: Acquire at least one sample magnetic field, and if the wind turbine communication signal attenuates after passing through the area where the sample magnetic field is located, use the frequency of the sample magnetic field as the characteristic frequency; Subtract the characteristic frequency from the communication frequency of the wind turbine to obtain a frequency difference, and take the maximum value of the frequency difference as the frequency critical value; When the difference between the magnetic field frequency and the wind turbine communication frequency is less than the frequency critical value, the magnetic field frequency and the wind turbine communication frequency are close.

6. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 5 is characterized in that: Classifying the wind turbines according to the identification results includes the following steps: When the interference in the communication identification area cannot be ignored, the wind turbines located in the communication identification area are regarded as non-node units; When the interference in the communication identification area can be ignored, the wind turbines located in the communication identification area are regarded as node units.

7. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 6, characterized in that: Analyzing the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated includes the following steps: Real-time statistics are generated on the signal strength at the end of the preliminary communication link, and a time-dependent image of the signal strength at the end of the preliminary communication link is generated. The image of the signal strength relative to time is fitted to obtain a time-consuming prediction function. The first-order derivative of the time-consuming prediction function is used as the characteristic function; When the difference between the signal strength at the end of the preliminary communication link and the minimum identification strength of the signal is less than the measurement allowable error and the characteristic function is less than 0, the preliminary communication link is taken as to be regulated.

8. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 7, characterized in that: The step of analyzing and obtaining at least one abnormal path based on the characteristic communication link comprises the following steps: Statistically calculating a drop in signal strength at the end of the characteristic communication link as a characteristic amplitude; Summarize the characteristic communication links with consistent characteristic amplitudes into a characteristic communication link set; An intersection of the characteristic communication links in the characteristic communication link set is taken to obtain at least one abnormal path.

9. The low-latency uninterrupted communication method for wind turbines based on wireless and wired integration according to claim 8, characterized in that: The correction of the characteristic communication link to obtain the target communication link comprises the following steps: The wind turbine located at the endpoint of the abnormal path is used as the benchmark wind turbine; Obtain wind turbines that are not on the straight line of the abnormal path as transfer wind turbines; The transfer wind turbines that do not interfere with the reference wind turbines are selected as candidate wind turbines, and the candidate wind turbines with the smallest sum of distances to the reference wind turbines are selected as the final wind turbines; The path connecting the final wind turbines to the two end points of the abnormal path is used as the correction path; The abnormal path in the characteristic communication link is replaced by the corrected path to obtain the target communication link.

Images