Wind turbine generator low-delay uninterrupted communication method based on wireless and wired fusion

Abstract

The invention discloses a wind turbine generator low-delay uninterrupted communication method based on wireless and wired fusion, which relates to the technical field of communication and comprises the following steps: forming a communication identification area based on a feature 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 generator to the feature position; obtaining at least one preliminary communication link to be regulated and controlled, and taking the preliminary communication link to be regulated and controlled as a feature communication link; analyzing to obtain 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 primary communication link and correcting a feature communication link, it is guaranteed that attenuation and delay of signals are acceptable, meanwhile, according to changes of a magnetic field, local correction needs to be carried out on the abnormal primary communication link, and the accuracy of the communication identification area is improved. And thus, the communication quality meets requirements.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and specifically to a low-latency uninterrupted communication method for wind turbine units based on the integration of wireless and wired connections. Background Art

[0002] With the continuous development of technology, wind power generation has become an important part of the global energy field. However, traditional wind power generation methods have many limitations in practical applications, such as remote geographical locations and unstable communication signals. Wind power generation requires real-time monitoring to promptly detect possible faults. Unstable communication signals can easily lead to unstable monitoring and high latency. To solve these problems, more and more wind power generation enterprises have begun to attempt to adopt a remote monitoring solution for wind power generation that integrates wireless and wired connections. The non-adoption of a fully wired method is mainly restricted by cost and construction difficulty.

[0003] However, the terrain and weather conditions between the wind turbine units and the monitoring devices are complex, making it difficult to determine the signal stability and latency, and thus unable to accurately switch between wireless and wired communications and select communication paths. Summary of the Invention

[0004] To solve the above technical problems, a low-latency uninterrupted communication method for wind turbine units based on the integration of wireless and wired connections is provided, and this technical solution solves the problems raised in the above background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A low-latency uninterrupted communication method for wind turbine units based on the integration of wireless and wired connections, comprising:

[0007] Obtain the locations of at least one wind turbine unit as target locations, obtain the wired communication paths between two of the wind turbine units, and summarize them to form a wired connection network;

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

[0009] Identify weather and terrain interferences in the communication identification area to obtain the identification result of the communication identification area, and classify the wind turbine units according to the identification result to obtain node units and non-node units;

[0010] Form a preliminary communication link from the wind turbine units to the characteristic location according to the node units and the non-node units, and perform integrated communication on the wind turbine units using the step communication link;

[0011] During the converged communication process, analyze the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated, and use the preliminary communication link to be regulated as the characteristic communication link;

[0012] Based on the characteristic communication link, analyze to obtain at least one abnormal path;

[0013] Based on the abnormal path, correct the characteristic communication link to obtain the target communication link, and perform communication from the wind turbine to the characteristic location according to the target communication link.

[0014] Preferably, the steps of obtaining the wired communication paths between the two wind turbines and summarizing them into a wired connection network include the following:

[0015] If there is an optical fiber connected between two wind turbines, use the optical fiber between the two wind turbines as the wired communication path; otherwise, the two wind turbines are in a wired disconnected state;

[0016] Summarize the distribution of the wired communication paths to form a wired connection network.

[0017] Preferably, the steps of forming a communication recognition area based on the characteristic location and the target location include the following:

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

[0019] Uniformly take at least one sampling point on the historical transmission path, use the maximum value of the distance from the sampling point to the characteristic line segment as the characteristic distance, and use four times the characteristic distance as the preset distance;

[0020] Use the area passed by the characteristic line segment as the communication recognition area, the width of the communication recognition area is the preset distance, and the characteristic line segment is the midline of the communication recognition area.

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

[0022] Obtain the allowable delay of the 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 recognition area from the allowable distance to obtain the redundant distance;

[0023] Obtain the height when the wind turbine signal is transmitted as the characteristic height, and identify at least one obstacle area in the communication recognition area, where the obstacle area is the area where the obstacle is higher than the characteristic height;

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

[0025] Form an initial direction, where the initial direction extends along the direction of the feature line segment and the height of the initial direction is the feature height;

[0026] In the obstacle three-dimensional model, according to the reflection mechanism, simulate at least one reflection path of the signal along the initial direction leaving the obstacle area after reflection, and take the reflection path with the end direction equal to the direction of the feature line segment as the target reflection path, where the reflection mechanism is that the reflection angle is equal to the incident angle;

[0027] Accumulate the lengths of at least one target reflection path in the communication identification area to obtain a judgment value. When the judgment value is greater than the redundant distance, the interference in the communication identification area cannot be ignored; otherwise, the interference in 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 as the magnetic field interference area;

[0029] In the historical communication data, obtain the value range of the comprehensive magnetic field intensity in the magnetic field interference area as the feature range, and equally divide the feature range to obtain at least one identification point. The comprehensive magnetic field intensity is the product of the area of the magnetic field interference area and the magnetic field intensity;

[0030] Form a sample area. Under the condition that the comprehensive magnetic field intensity in the sample area is the value at the identification point, obtain the retention ratio of the communication signal after passing through the sample area, pair the identification point with the retention ratio and fit to obtain the interference fitting function;

[0031] Multiply the area of the magnetic field interference area 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 actual retention ratio;

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

[0033] Preferably, the step of identifying at least one area in the communication identification area where the magnetic field frequency is close to the communication frequency of the wind turbine as the magnetic field interference area includes the following steps:

[0034] Obtain at least one sample magnetic field. If the wind turbine communication signal attenuates after passing through the area where the sample magnetic field is located, take the frequency of the sample magnetic field as the characteristic frequency;

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

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

[0037] Preferably, classifying the wind turbines according to the recognition result includes the following steps:

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

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

[0040] Preferably, forming a preliminary communication link from the wind turbine to the characteristic position according to the node units and non-node units includes the following steps:

[0041] When the wind turbine is a node unit, the preliminary 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 from the wind turbine is used as the target node unit;

[0043] The remaining wind turbines between the wind turbine and the target node unit are used as target wind turbines;

[0044] At least one signal interference area between the wind turbine and the target node unit is identified;

[0045] At least one preliminary path between the wind turbine and the target node unit is formed, and the preliminary path passes through several of the target wind turbines;

[0046] When there is a signal interference area between adjacent target node units in the preliminary path, the adjacent target node units with the signal interference area are paired as the 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 preliminary path, the preliminary path is used as an alternative path, and the shortest alternative path is used as the target path;

[0048] The connection between the target path and the line connecting the target node unit to the characteristic position is 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 includes the following steps:

[0050] Statistically analyze the signal strength at the end of the preliminary communication link in real time, plot an image of the signal strength at the end of the preliminary communication link against time, fit the image of the signal strength against time, and obtain a time-consuming prediction function;

[0051] Take the first derivative of the time-consuming prediction function as the characteristic function;

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

[0053] Preferably, the analyzing at least one abnormal path based on the characteristic communication link includes the following steps:

[0054] Statistically analyze the descending amplitude of the signal strength at the end of the characteristic communication link as the characteristic amplitude;

[0055] Summarize the characteristic communication links with the same characteristic amplitude into a characteristic communication link set;

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

[0057] Preferably, the modifying the characteristic communication link to obtain the target communication link includes the following steps:

[0058] Take the wind turbine located at the end point of the abnormal path as the reference wind turbine;

[0059] Obtain the wind turbines not on the straight line where the abnormal path is located as the transfer wind turbines;

[0060] Take the transfer wind turbines that have no interference with the reference wind turbine as the alternative wind turbines, and take the alternative wind turbine with the minimum sum of distances to the reference wind turbine as the final wind turbine;

[0061] Take the path connecting the two end points of the abnormal path by the final wind turbine as the correction path;

[0062] Use the correction path to replace the abnormal path in the characteristic communication link to obtain the target communication link.

[0063] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0064] By forming a communication identification area, identifying weather and terrain interferences in the communication identification area, forming a preliminary communication link, and correcting the characteristic communication link, it is possible to accurately analyze the terrain and weather conditions between the wind turbine and the monitoring device, and then determine the impact of the terrain and weather 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 regions changes with time, the preliminary communication link may not meet the requirements. Therefore, it is necessary to locally correct the abnormal preliminary communication link to ensure that the communication quality meets the requirements. Description of the Drawings

[0065] Figure 1 It is a schematic flow chart of the method for low-delay uninterrupted communication of wind turbines based on the integration of wireless and wired in the present invention;

[0066] Figure 2 It is a schematic flow chart of the present invention for obtaining the wired communication path between two wind turbines and aggregating them to form a wired connection network;

[0067] Figure 3 It is a schematic flow chart of the present invention for forming a communication identification area based on the characteristic position and the target position;

[0068] Figure 4 It is a schematic flow chart of the present invention for identifying weather and terrain interferences in the communication identification area to obtain the identification result of the communication identification area;

[0069] Figure 5 It is a schematic flow chart of the present invention for identifying at least one area in the communication identification area where the magnetic field frequency is close to the communication frequency of the wind turbine as the magnetic field interference area;

[0070] Figure 6 It is a schematic flow chart of the present invention for classifying wind turbines according to the identification result;

[0071] Figure 7 It is a schematic flow chart of the present invention for forming a preliminary communication link from the wind turbine to the characteristic position according to the node unit and the non-node unit;

[0072] Figure 8 It is a schematic flow chart of the present invention for analyzing the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated;

[0073] Figure 9 It is a schematic flow chart of the present invention for analyzing at least one abnormal path based on the characteristic communication link;

[0074] Figure 10Schematic diagram of the process for correcting a characteristic communication link to obtain a target communication link according to the present invention. Detailed implementation manners

[0075] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

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

[0077] Obtain the locations of at least one wind turbine as target locations, obtain the wired communication paths between two of the wind turbines, and summarize them to form a wired connection network;

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

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

[0080] Form a preliminary communication link from the wind turbine to the characteristic location according to the node wind turbines and the non-node wind turbines, and use the step communication link to perform integrated communication on the wind turbines;

[0081] During the integrated communication process, analyze the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated, and use the preliminary communication link to be regulated as the characteristic communication link;

[0082] Analyze based on the characteristic communication link to obtain at least one abnormal path;

[0083] Based on the abnormal path, correct the characteristic communication link to obtain a target communication link, and perform communication from the wind turbine to the characteristic location according to the target communication link.

[0084] Wind turbines are usually located offshore or on land. When on land, there may be situations where mountains block the signal. Thus, the signal can only pass through the gaps in the mountains by reflection. However, since the area occupied by the mountains may be large, the reflection path may be very long, resulting in a significant delay. Therefore, this situation needs to be addressed. In addition, since there are many wind turbines and their overall occupied area is large, the weather conditions at different locations are different, such as thunderstorms. The magnetic field interference generated will weaken the signal, making the signal unrecognizable. Therefore, it is necessary to adjust the signal transmission path. When analyzing magnetic field interference, it should be noted that only magnetic fields with frequencies similar to the communication signal will cause signal interference, while interference with a large frequency difference will not affect the communication signal. Considering the above situations, a series of steps will be set up subsequently to handle the above situations.

[0085] Refer to Figure 2 As shown, to obtain the wired communication path between two of the wind turbines and summarize to form a wired connection network, the following steps are included:

[0086] If there is an optical fiber connected between two wind turbines, then the optical fiber between the two wind turbines is used as the wired communication path; otherwise, the two wind turbines are in a wired disconnected state.

[0087] Summarize the distribution of the wired communication path to form a wired connection network.

[0088] Refer to Figure 3 As shown, to form a communication recognition area based on the characteristic position and the target position, the following steps are included:

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

[0090] Uniformly take at least one sampling point on the historical transmission path, take the maximum value of the distance from the sampling point to the characteristic line segment as the characteristic distance, and take four times the characteristic distance as the preset distance.

[0091] Use the area passed by the characteristic line segment as the communication recognition area. The width of the communication recognition area is the preset distance, and the characteristic line segment is the midline of the communication recognition area.

[0092] There may be a situation of reflected transmission in the historical transmission path. Therefore, it may be a broken line, which does not coincide with the characteristic line segment. It may be partially on the left side of the characteristic line segment and partially on the right side of the characteristic line segment. It is necessary to form a communication recognition area to ensure that subsequent communication paths are within the communication recognition area. Thus, based on the recognition of weather and terrain in the communication recognition area, it can be determined whether the communication recognition 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 recognition area can cover the transmission path in most cases. However, to avoid sudden changes in the transmission path caused by uncontrollable factors, therefore, using four times the characteristic distance as the width of the communication recognition area can ensure that the communication path from the wind turbine to the monitored device is within the communication recognition area. Thus, the environment of the communication path can be recognized, and then the communication path can be corrected according to the environmental situation.

[0093] Referring to Figure 4 As shown, the steps for recognizing weather and terrain interference in the communication recognition area and obtaining the recognition result of the communication recognition area are as follows:

[0094] Obtain the allowable delay for wind turbine communication. Multiply the allowable delay by the speed of light to obtain the allowable distance. Subtract the length of the characteristic line segment corresponding to the communication recognition area from the allowable distance to obtain the redundant distance;

[0095] Obtain the height during the signal transmission of the wind turbine as the characteristic height. Identify at least one obstacle area within the communication recognition area. The obstacle area is the area where the obstacle is higher than the characteristic height;

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

[0097] Form an initial direction. 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 obstacle three-dimensional model, simulate at least one reflection path of the signal along the initial direction leaving the obstacle area according to the reflection mechanism. The reflection path with the end direction equal to the direction of the characteristic line segment is used as the target reflection path. The reflection mechanism is that the reflection angle is equal to the incident angle;

[0099] Accumulate the lengths of at least one target reflection path within the communication recognition area to obtain a judgment value. When the judgment value is greater than the redundant distance, the interference within the communication recognition area cannot be ignored. Otherwise, the interference within the communication recognition area can be ignored;

[0100] Identify at least one area within the communication recognition area where the magnetic field frequency is close to the communication frequency of the wind turbine as the magnetic field interference area;

[0101] In historical communication data, obtain the value range of the comprehensive magnetic field intensity in the magnetic field interference area as the characteristic range, equally spaced divide the characteristic range to obtain at least one identification point. The comprehensive magnetic field intensity is the product of the area of the magnetic field interference area and the magnetic field intensity.

[0102] Form a sample area. Under the condition that the comprehensive magnetic field intensity in the sample area is the value at the identification point, obtain the retention ratio of the communication signal after passing through the sample area. Pair and fit the identification point with the retention ratio to obtain the interference fitting function.

[0103] Multiply the area of the magnetic field interference area 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 actual retention ratio.

[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 intensity of the wind turbine communication signal to obtain the communication retention intensity. According to the historical identification situation, obtain the minimum identification intensity of the signal. When the communication retention intensity is less than the minimum identification intensity, the interference in the communication identification area cannot be ignored; otherwise, the interference in the communication identification area can be ignored.

[0105] During identification, it is mainly carried out from two aspects: delay and signal attenuation. The delay is mainly caused by the occlusion of obstacles. In order to cross the obstacles, the signal usually undergoes multiple reflections and crosses the obstacles 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 an increase in the transmission time. Therefore, the delay is obvious, and thus, the transmission path needs to be changed. During reflection, since the terrain can be pre-modeled, according to the signal reflection mechanism, the reflection path can be predicted, thereby obtaining the reflection distance and time, and then making a judgment.

[0106] In addition, thunderstorms and the magnetic fields generated at different positions may affect the communication signal. Use the sample area to model the influence situation and predict the actual situation according to the modeling results. Thus, the attenuation effect of the communication identification area on the signal can be predicted.

[0107] Refer to Figure 5 As shown, the steps for identifying at least one area in the communication identification area where the magnetic field frequency is close to the wind turbine communication frequency as the magnetic field interference area are as follows:

[0108] Obtain at least one sample magnetic field. If the wind turbine communication signal attenuates after passing through the area where the sample magnetic field is located, then use the frequency of the sample magnetic field as the characteristic frequency.

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

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

[0111] Here, a basis for judging similar frequencies is formed for predicting interference. Interference with the same or similar frequencies will generate resonance, but with different phases, which will cause mutual cancellation. However, signals with a large frequency difference will not affect each other. Therefore, they do not need to be considered.

[0112] Refer to Figure 6 As shown, according to the recognition result, classifying the wind turbines includes the following steps:

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

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

[0115] Refer to 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 position includes the following steps:

[0116] When the wind turbine is a node unit, the preliminary 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 from the wind turbine is used as the target node unit;

[0118] The remaining wind turbines between the wind turbine and the target node unit are used as target wind turbines;

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

[0120] Form at least one preliminary path between the wind turbine and the target node unit, and the preliminary path passes through several of the target wind turbines;

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

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

[0123] Take the connection line from the target path to the target node unit at the characteristic position 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 signals for transmission, and the remaining parts of the preliminary communication link use wireless signals for transmission.

[0124] According to the classification of wind turbine units, the communication identification area of the node unit does not affect communication. Therefore, the node unit communicates directly with the characteristic position. However, the communication identification area of the non-node unit affects communication. Therefore, a replacement path needs to be formed for communication, mainly through the non-node unit transmitting to the node unit as a transfer point for transmission. However, there may be interference in the path from the non-node unit to the node unit. Due to the presence of optical fibers, therefore, through the method of integrating wired and wireless, the interference can be avoided.

[0125] Refer to 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 of the signal strength at the end of the preliminary communication link, and making an image of the signal strength at the end of the preliminary communication link with respect to time, fitting the image of the signal strength with respect to time to obtain a time-consuming prediction function;

[0127] Take the first derivative of the time-consuming prediction function as the characteristic function;

[0128] When the gap between the signal strength at the end of the preliminary communication link and the minimum recognition strength of the signal is less than the measurement allowable error and the characteristic function is less than 0, then the preliminary communication link is regarded as the one to be regulated.

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

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

[0131] Statistical the decrease amplitude of the signal strength at the end of the characteristic communication link as the characteristic amplitude;

[0132] Summarize the characteristic communication links with the same characteristic amplitude into a set of characteristic communication links;

[0133] Take the intersection of the characteristic communication links in the set of characteristic communication links to obtain at least one abnormal path.

[0134] Refer to Figure 10 As shown, the steps for correcting the characteristic communication link to obtain the target communication link include the following:

[0135] Take the wind turbine located at the end point of the abnormal path as the reference wind turbine;

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

[0137] Take the transfer wind turbines that have no interference with the reference wind turbine as the alternative wind turbines, and take the alternative wind turbine with the minimum sum of distances to the reference wind turbine as the final wind turbine;

[0138] Take the path connecting the two end points of the abnormal path by the final wind turbine as the correction path;

[0139] Use the correction path to replace the abnormal path in the characteristic communication link to obtain the target communication link.

[0140] Furthermore, this 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 can be understood that the storage medium can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid-state disk (SSD).

[0142] In summary, the advantages of the present invention are as follows: By forming a communication recognition area, identifying weather and terrain interference in the communication recognition area, forming a preliminary communication link, and correcting the characteristic communication link, it is possible to accurately analyze the terrain and weather conditions between the wind turbine and the monitoring device, and then determine its 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 regions may 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 basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required 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, characterized in that, Including: Obtain the location of at least one wind turbine as the target location, obtain the wired communication paths between two of the wind turbines, and summarize them to form a wired connection network; Obtain the location of the device for monitoring the wind turbine as the characteristic location, and form a communication recognition area based on the characteristic location and the target location; Identify weather and terrain interferences in the communication recognition area to obtain the recognition result of the communication recognition area, and classify the wind turbines according to the recognition result to obtain node turbines and non-node turbines; Form a preliminary communication link from the wind turbine to the characteristic location according to the node turbines and non-node turbines, and perform fusion communication on the wind turbines using the step communication link; During the fusion communication process, analyze the signal strength at the end of the preliminary communication link to obtain at least one preliminary communication link to be regulated, and use the preliminary communication link to be regulated as the characteristic communication link; Analyze based on the characteristic communication link to obtain at least one abnormal path; Based on the abnormal path, correct the characteristic communication link to obtain the target communication link, and perform communication from the wind turbine to the characteristic location according to the target communication link.

2. The low-latency and uninterrupted communication method for a wind turbine based on the integration of wireless and wired according to claim 1, characterized in that, The step of obtaining the wired communication paths between two of the wind turbines and summarizing them to form a wired connection network includes the following steps: If there is an optical fiber connected between two wind turbines, use the optical fiber between the two wind turbines as the wired communication path; otherwise, the two wind turbines are in a wired disconnected state; Summarize the distribution of the wired communication paths to form a wired connection network.

3. The method for low-latency and uninterrupted communication of a wind turbine based on the integration of wireless and wired, as claimed in claim 2, wherein The step of forming a communication recognition area based on the characteristic location and the target location includes the following steps: Obtain at least one historical transmission path of the wireless signal between the target location and the characteristic location, and use the line segment connecting the characteristic location and the target location as the characteristic line segment; Uniformly take at least one sampling point on the historical transmission path, use the maximum value of the distance from the sampling point to the characteristic line segment as the characteristic distance, and use four times the characteristic distance as the preset distance; Use the area passed by the characteristic line segment as the communication recognition area, the width of the communication recognition area is the preset distance, and the characteristic line segment is the median line of the communication recognition area.

4. The method for low-latency and uninterrupted communication of a wind turbine based on the integration of wireless and wired according to claim 3, wherein The step of identifying weather and terrain interferences in the communication recognition area to obtain the recognition result of the communication recognition area includes the following steps: Obtain the allowable delay of the 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 recognition area from the allowable distance to obtain the redundant distance; Obtain the height when the wind turbine signal is transmitted as the characteristic height, and identify at least one obstacle area in the communication recognition area, where the obstacle area is the area where the obstacle is higher than the characteristic height; Perform three-dimensional modeling on the obstacles in the obstacle area to obtain the obstacle three-dimensional model; Form an initial direction, where 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 obstacle three-dimensional model, simulate at least one reflection path of the signal extending along the initial direction leaving the obstacle area according to the reflection mechanism, and use the reflection path with the end direction equal to the direction of the characteristic line segment as the target reflection path, where the reflection mechanism is that the reflection angle is equal to the incident angle; Accumulate the lengths of at least one target reflection path within the communication recognition area to obtain a judgment value. When the judgment value is greater than the redundant distance, the interference within the communication recognition area cannot be ignored; otherwise, the interference within the communication recognition area can be ignored. Identify at least one area within the communication recognition area where the magnetic field frequency is close to the communication frequency of the wind turbine as a magnetic field interference area. In the historical communication data, obtain the value range of the comprehensive magnetic field intensity within the magnetic field interference area as a characteristic range. Divide the characteristic range at equal intervals to obtain at least one identification point. The comprehensive magnetic field intensity is the product of the area of the magnetic field interference area and the magnetic field intensity. Form a sample area. Under the condition that the comprehensive magnetic field intensity within the sample area is the value at the identification point, obtain the retention ratio of the communication signal after passing through the sample area. Pair and fit the identification point with the retention ratio to obtain an interference fitting function. Multiply the area of the magnetic field interference area by the actual magnetic field intensity to obtain an actual interference value. Substitute the actual interference value into the interference fitting function to obtain an actual retention ratio. Multiply at least one actual retention ratio within the communication recognition area to obtain a total retention ratio. Multiply the total retention ratio by the intensity of the wind turbine communication signal to obtain a communication retention intensity. According to the historical identification situation, obtain the minimum identification intensity of the signal. When the communication retention intensity is less than the minimum identification intensity, the interference within the communication recognition area cannot be ignored; otherwise, the interference within the communication recognition area can be ignored.

5. The method for low-latency and uninterrupted communication of a wind turbine based on the integration of wireless and wired according to claim 4, wherein The step of identifying at least one area within the communication recognition area where the magnetic field frequency is close to the communication frequency of the wind turbine as a magnetic field interference area includes the following steps: Obtain at least one sample magnetic field. 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 a characteristic frequency. Subtract the wind turbine communication frequency from the characteristic frequency to obtain a frequency difference value. Use the maximum value of the frequency difference value as a 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 considered close.

6. The low-latency uninterrupted communication method for a wind turbine based on the integration of wireless and wired according to claim 5, characterized in that, The step of classifying the wind turbines according to the identification results includes the following steps: When the interference within the communication recognition area cannot be ignored, regard the wind turbines located within the communication recognition area as non-node units. When the interference within the communication recognition area can be ignored, regard the wind turbines located within the communication recognition area as node units.

7. The low-latency uninterrupted communication method for a wind turbine based on the integration of wireless and wired according to claim 6, characterized in that, The step of forming a preliminary communication link from the wind turbine to the characteristic position according to the node units and non-node units includes the following steps: When the wind turbine is a node unit, the preliminary communication link from the wind turbine to the characteristic position is a line segment connecting the wind turbine and the characteristic position. When the wind turbine is a non-node unit, regard the node unit with the smallest distance from the wind turbine as the target node unit. Regard the remaining wind turbines between the wind turbine and the target node unit as target wind turbines. Identify at least one signal interference area between the wind turbine and the target node unit. Form at least one preliminary path between the wind turbine and the target node unit. The preliminary path passes through several of the target wind turbines. When there is a signal interference area between adjacent target node units in the preliminary path, the adjacent target node units in the signal interference area are paired into 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 preliminary path, the preliminary path is used as an 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.

8. The low-latency and uninterrupted communication method for a wind turbine based on the integration of wireless and wired according to claim 7, wherein The analysis of 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 of the signal strength at the end of the preliminary communication link, and making an image of the signal strength at the end of the preliminary communication link with respect to time, fitting the image of the signal strength with respect to time, and obtaining a time-consuming prediction function; Taking the first derivative of the time-consuming prediction function as the characteristic function; When the difference between the signal strength at the end of the preliminary communication link and the minimum recognition strength of the signal is less than the measurement allowable error and the characteristic function is less than 0, the preliminary communication link is regarded as to be regulated.

9. The method for low-latency and uninterrupted communication of a wind turbine based on the integration of wireless and wired according to claim 8, wherein The analysis based on the characteristic communication link to obtain at least one abnormal path includes the following steps: Statistical the decrease amplitude of the signal strength at the end of the characteristic communication link as the characteristic amplitude; Summarize the characteristic communication links with the same characteristic amplitude into a characteristic communication link set; Taking the intersection of the characteristic communication links in the characteristic communication link set to obtain at least one abnormal path.

10. The method for low-latency and uninterrupted communication of a wind turbine based on the integration of wireless and wired according to claim 9, characterized in that, The correction of the characteristic communication link to obtain the target communication link includes the following steps: Taking the wind turbine located at the end point of the abnormal path as the reference wind turbine; Obtaining the wind turbines not on the straight line where the abnormal path is located as the transfer wind turbines; Taking the transfer wind turbines that have no interference with the reference wind turbine as the alternative wind turbines, and taking the alternative wind turbine with the minimum sum of distances to the reference wind turbine as the final wind turbine; Taking the path connecting the two end points of the abnormal path by the final wind turbine as the correction path; Using the correction path to replace the abnormal path in the characteristic communication link to obtain the target communication link.

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