A power line communication system based on multi-carrier aggregation technology

Abstract

The present invention relates to the field of power line communication, and in particular to a power line communication system based on multi-carrier aggregation technology. The present invention determines the transmission interference characterization value of the power line network in the area based on the collected environmental characteristics of each area combined with the corresponding burst noise intensity, so as to determine the abnormal tendency category of the power line network in each area for transmission work, and calls relevant modules for analysis, including obtaining the interference characteristics of each branched transmission path in the area to analyze the transmission parameters, so as to determine whether the data signal transmission of the branched transmission path meets the transmission standard, and identify the corresponding offset branched transmission path; according to the data signal strength and data signal transmission rate of the path, the carrier transmission abnormality characterization coefficient is analyzed to identify whether the carrier frequency band of the data signal in each branched transmission path needs to be adjusted; the present invention can timely capture the changes of interference factors affecting power line communication, timely identify the path area where failure may occur, and ensure the quality of data signal transmission.

Description

Technical Field

[0001] The present invention relates to the field of power line communication, and in particular to a power line communication system based on multi-carrier aggregation technology. Background Art

[0002] Power lines were originally designed to transmit electrical energy, not communications, because their channels have many unfavorable factors, such as large noise interference, including background noise, pulse noise, etc.; severe signal attenuation. With the increase of transmission distance and the branching of lines and the access of loads, the signal strength will drop significantly. However, by reasonably allocating data transmission on different carriers and adopting corresponding modulation and demodulation technologies, multi-carrier aggregation technology can enable the system to better cope with various interferences in the power line channel. For example, for pulse noise interference, the part of the data that is more affected can be adjusted to other relatively clean carriers for transmission, thereby reducing the impact of noise on the overall communication quality.

[0003] Chinese patent application publication number: CN115297379A, discloses a multi-mode broadband carrier power line communication system, which includes: a carrier circuit; a multi-mode power communication terminal, electrically connected to the carrier circuit and used to provide a wireless local area network; a power consumption adjustment module, electrically connected to the carrier circuit, used to adjust the power consumption of the carrier circuit; an integrated circuit module, used to connect to the multi-mode power communication terminal and the power consumption adjustment module through the carrier circuit; a processor, used to be electrically connected to the integrated circuit module.

[0004] However, there are still the following problems in the prior art:

[0005] During the operation of the power system, it will inevitably be affected by noise. Under the continuous interference of noise, it will affect the signal transmission, especially in the area with dense lines, which will aggravate the above phenomenon. If it is not intervened and adjusted in time, the stability of data signal transmission will be reduced, affecting the quality of data signals. Summary of the invention

[0006] To this end, the present invention provides a power line communication system based on multi-carrier aggregation technology to overcome the problem in the prior art that the power system will inevitably be affected by noise during operation. Under the continuous interference of noise, signal transmission will be affected, especially in areas with dense lines, aggravating the above phenomenon. If intervention and adjustment are not made in time, the stability of data signal transmission will be reduced, affecting the quality of data signals.

[0007] To achieve the above object, the present invention provides a power line communication system based on multi-carrier aggregation technology, which includes:

[0008] A feature collection module, comprising a noise collection unit arranged at a power line connection position for collecting the intensity of sudden noise and a data collection unit for collecting interference features of each bifurcated transmission path;

[0009] An image storage module, used to store distribution image data of several areas of the power system, and determine the environmental characteristics of each area according to the distribution image data;

[0010] an abnormality analysis module, which is connected to the feature acquisition module and the image storage module respectively, and is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, so as to determine the abnormal tendency category of the power line network in each area for transmission work;

[0011] A path identification module, which is connected to the abnormality analysis module, is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area to analyze the transmission parameters, determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and identify the corresponding offset bifurcated transmission path;

[0012] an abnormality identification module, which is connected to the path identification module and is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate, so as to identify whether it is necessary to adjust the carrier frequency band of the data signal in each bifurcated transmission path;

[0013] A calling module connected to the abnormality analysis module for calling the path identification module and the abnormality identification module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category;

[0014] The interference characteristics include the number of loads on each of the branched transmission paths and the average rated maximum power of each of the loads, and the environmental characteristics include the number of branches of the power line network in each of the areas and the equipment density in each of the areas.

[0015] Furthermore, the abnormal analysis module is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, including:

[0016] The sum of the ratio of the number of forks of the power line network to the threshold value of the number of forks and the ratio of the device density to the threshold value of the device density is used as the first transmission feature;

[0017] Using the ratio of the burst noise intensity to the intensity threshold as the second transmission feature;

[0018] The first transmission characteristic and the second transmission characteristic are weightedly summed to obtain a transmission interference characterization value.

[0019] Furthermore, the abnormal analysis module is used to determine the abnormal tendency category of the power line network in each area for transmission work, including:

[0020] If the transmission interference characterization value is greater than or equal to the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is classified as an abnormal tendency;

[0021] If the transmission interference characterization value is less than the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is a non-abnormal tendency category.

[0022] Further, the calling module is used to call the path identification module and the abnormality discrimination module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category, including:

[0023] If there is an abnormal tendency of the power line network in any area to perform transmission work as an abnormal tendency category, the path identification module and the abnormal identification module are called.

[0024] Furthermore, the path identification module is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area and analyze the transmission parameters, including:

[0025] Using the ratio of the load quantity on the forked transmission path to the load quantity threshold as the first interference feature;

[0026] Using a ratio of an average of the maximum rated powers of the loads on the bifurcated transmission path to a power threshold as a second interference feature;

[0027] The sum of the first interference characteristic and the second interference characteristic is determined as a transmission parameter.

[0028] Furthermore, the path identification module is used to determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and the identification of the corresponding offset bifurcated transmission path includes:

[0029] If the transmission parameter corresponding to the bifurcated transmission path is greater than or equal to the transmission parameter standard threshold, it is determined that the data signal transmission of the bifurcated transmission path does not meet the transmission standard;

[0030] The method is used to determine a bifurcated transmission path that does not meet the transmission standard as an offset bifurcated transmission path.

[0031] Furthermore, the abnormal identification module is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate, including:

[0032] to calculate the relative variance of the data signal strength of the offset bifurcated transmission path as the first transmission feature;

[0033] used to calculate the relative variance of the data signal transmission rate as a second transmission feature;

[0034] Used to determine the sum of the first transmission characteristic and the second transmission characteristic as a carrier transmission anomaly characterization coefficient.

[0035] Furthermore, the abnormality identification module is used to identify whether it is necessary to adjust the carrier frequency band of the data signal in each forked transmission path, including:

[0036] If the carrier transmission abnormality characterization coefficient is greater than or equal to the carrier transmission abnormality characterization coefficient threshold, it is necessary to adjust the carrier frequency band of the data signal in each branched transmission path.

[0037] Furthermore, it also includes a data display module, which is connected to the abnormality identification module and is used to display corresponding content based on the analysis result of the abnormality identification module;

[0038] The corresponding content includes the area corresponding to the bifurcated transmission path that needs to be adjusted and the current carrier frequency band of the data signal in the bifurcated transmission path.

[0039] Furthermore, it also includes an early warning module, which responds to the determination result of the abnormality analysis module.

[0040] If the abnormal analysis module determines that the abnormal tendency of the power line network in transmission work is an abnormal tendency category, an early warning signal is issued.

[0041] Compared with the prior art, the present invention determines the transmission interference characterization value of the power line network in the area based on the collected environmental characteristics of each area combined with the corresponding sudden noise intensity, so as to determine the abnormal tendency category of the power line network in each area for transmission work, and call the relevant modules for analysis, including obtaining the interference characteristics of each branched transmission path in the area to analyze the transmission parameters, so as to determine whether the data signal transmission of the branched transmission path meets the transmission standard, and identify the corresponding offset branched transmission path; according to the data signal strength and data signal transmission rate of the path, the carrier transmission abnormality characterization coefficient is analyzed to identify whether it is necessary to adjust the carrier frequency band of the data signal in each branched transmission path; the present invention can timely capture the changes of interference factors affecting power line communication, timely identify the path area where failure may occur, and ensure the quality of data signal transmission.

[0042] In particular, the present invention determines the transmission interference characterization value of the power line network in the area through environmental characteristics combined with the corresponding burst noise intensity. During the data signal transmission process of the power line network, by timely capturing the interference factors that may affect the quality of data signal transmission in the power line, the tendency of abnormalities caused by interference in the data signal transmission in the area can be comprehensively evaluated through these interference factors. The present application uses the transmission interference characterization value to characterize the degree of abnormal risk when the power line network in each area of ​​the power system performs transmission work, and provides data support for the subsequent determination of the abnormal tendency category of the power line network in each area for transmission work, which helps to discover potential risk areas in advance and timely identify the path area where faults may occur, and then analyze the data signal transmission in the area, effectively reducing the occurrence of faults during the transmission process and avoiding the scope and degree of impact of local area faults on the entire power system.

[0043] In particular, the present invention conducts targeted analysis on the transmission work of the power line network in the corresponding area under the abnormal tendency category, and analyzes the transmission parameters through the interference characteristics of the bifurcated transmission path. In actual situations, the layout of the bifurcated path of the power line network has a certain degree of influence and interference on the transmission of the signal. When the data signal is transmitted in the power line network, the large number of loads on the bifurcated transmission path of the data signal transmission path and the high average maximum rated power of each load will lead to an increase in the interference degree of the transmission process. When the interference degree caused by the above factors reaches a certain degree, it means that the current data signal transmission of the bifurcated path does not meet the transmission standard. In this case, the transmission of the data signal will reduce the quality of the data signal and there may be potential abnormal risks.

[0044] At the same time, during the transmission process, the data signal will pass through different power line network areas, and the line paths it passes through are also different. Since the loads on different line paths are different, and the transmission of data signals is a dynamic process, when the load of the path line changes, it will affect the transmission rate of the data signal in the power line, and may even affect the stability of the load equipment, so that the electromagnetic interference is enhanced, and then, the bifurcated transmission path that does not meet the transmission standard is identified as an offset bifurcated transmission path, and a more detailed analysis of the path is performed to further and more accurately determine the abnormality of the data signal transmission, and the carrier transmission abnormality characterization coefficient is analyzed through the data signal strength and data signal transmission rate of the path;

[0045] During the data signal transmission process, if the carrier frequency band interacts with other signals or noise in the surrounding environment and generates intermittent electromagnetic interference, the strength of the data signal in transmission may fluctuate unstably, which may make it difficult for the receiving end to correctly interpret the received data signal, or even cause the received data signal to be missing, thereby reducing the quality of the data signal. At the same time, if the channel environment in which the carrier frequency band is located is unstable, there is time-varying interference or multipath effect, resulting in the data signal transmission rate being unstable as well.

[0046] Therefore, the present application uses a carrier anomaly characterization coefficient to characterize the degree of inadaptability of the carrier frequency band in which the data signal in the current transmission process is located and the degree of fluctuation of relevant influencing indicators of the data signal during the transmission process, so as to facilitate subsequent timely adjustments and ensure the quality of data signal transmission. By adjusting the carrier frequency band, the signal can avoid interference factors and obtain a more stable data signal transmission strength and a stable transmission rate, thereby avoiding extending the time it takes for the data signal to reach the receiving end and ensuring the quality of the data signal received by the receiving end. The present application analyzes the above-mentioned situation and related interference factors, and reasonably and targetedly adjusts and optimizes the distribution of the carrier frequency band.

[0047] In particular, the present invention optimizes and improves the transmission quality of data signals in the power line network by comprehensively adjusting the carrier frequency bands of data signals in each branched transmission path. It does not adjust the carrier frequency bands of data signals in the offset branched paths with abnormal risks alone, but accurately determines whether there are abnormal risks in the power line network and the local or overall extent covered by the abnormal risks based on the characteristics presented by the above-mentioned paths during the data signal transmission process. Then, the carrier frequency bands of data signals in the entire power line network are adjusted. For example, the data signal is modulated to a frequency band with less signal attenuation through a filter, thereby restoring the data signal strength; the data signal is modulated to a frequency band with a more suitable bandwidth and less interference through a filter, thereby improving the data signal transmission rate to ensure the stability and quality of the overall data signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a functional module diagram of a power line communication system based on multi-carrier aggregation technology according to an embodiment of the invention;

[0049] Figure 2 A logic determination diagram for determining abnormal tendency categories of power line networks in transmission work in each area according to an embodiment of the invention;

[0050] Figure 3 A logic decision diagram for determining whether data signal transmission along a bifurcated transmission path complies with a transmission standard according to an embodiment of the invention;

[0051] Figure 4A logic decision diagram for identifying whether it is necessary to adjust the carrier frequency band of the data signal in each branch transmission path according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] See also Figures 1 to 4 As shown, Figure 1 is a functional module diagram of a power line communication system based on multi-carrier aggregation technology according to an embodiment of the present invention, Figure 2 This is a logic determination diagram for determining the abnormal tendency category of the power line network in each area for transmission work according to an embodiment of the present invention. Figure 3 A logic decision diagram for determining whether data signal transmission along a bifurcated transmission path complies with a transmission standard according to an embodiment of the invention. Figure 4 In order to provide a logic decision diagram for identifying whether it is necessary to adjust the carrier frequency band of the data signal in each forked transmission path in the embodiment of the invention, the power line communication system based on the multi-carrier aggregation technology in the embodiment of the invention includes:

[0056] A feature collection module, comprising a noise collection unit arranged at a power line connection position for collecting the intensity of sudden noise and a data collection unit for collecting interference features of each bifurcated transmission path;

[0057] An image storage module, used to store distribution image data of several areas of the power system, and determine the environmental characteristics of each area according to the distribution image data;

[0058] an abnormality analysis module, which is connected to the feature acquisition module and the image storage module respectively, and is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, so as to determine the abnormal tendency category of the power line network in each area for transmission work;

[0059] A path identification module, which is connected to the abnormality analysis module, is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area to analyze the transmission parameters, determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and identify the corresponding offset bifurcated transmission path;

[0060] An abnormality identification module, which is connected to the path identification module, is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate to identify whether it is necessary to adjust the carrier frequency band of the data signal in each bifurcated transmission path;

[0061] A calling module connected to the abnormality analysis module for calling the path identification module and the abnormality identification module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category;

[0062] The interference characteristics include the number of loads on each of the branched transmission paths and the average maximum rated power of each of the loads, and the environmental characteristics include the number of branches of the power line network in each of the areas and the equipment density in each of the areas.

[0063] Specifically, there is no limitation on the division rules of several areas of the power system. In this implementation, the division is based on spatial regions, and the areas of each divided area should be equal, which will not be elaborated here.

[0064] Specifically, there is no specific limitation on the structure of the noise collection unit, which only needs to have the function of collecting the intensity of sudden noise. For example, the sudden noise signal can be collected and analyzed by a power line noise detector. In implementation, taking sudden electromagnetic noise as an example, the power line noise detector can detect sudden electromagnetic noise and determine the noise intensity.

[0065] It is understandable that the power line noise detector has high anti-interference ability and sensitivity, and can accurately detect various noise signals in the power line network, including sudden noise, which can help maintenance personnel quickly locate the noise source and improve the efficiency of troubleshooting.

[0066] It is understandable that, in actual situations, electromagnetic noise may not exist normally, and is usually generated due to abnormalities in surrounding lines or due to related electromagnetic equipment in the lines.

[0067] Specifically, there is no specific limitation on the structure and composition of the data acquisition unit, and it only needs to have the function of collecting interference characteristics. For example, in some possible implementations, a high-definition camera can be mounted on a movable vehicle to capture and collect the load quantity on each forked transmission path;

[0068] Of course, relevant data can also be input into the system by technicians in this field in advance. For example, technicians in this field determine the number of loads on the transmission path and the maximum rated power corresponding to the loads. Of course, other methods can also be used, which will not be repeated here.

[0069] It can be understood that, for the method of acquiring the distributed image data of several areas of the power system stored in the image storage module, a movable vehicle equipped with a high-definition drone can be used for acquisition and collection, and then the acquired distributed image data can be pre-stored in a database, and the database can be called to extract the environmental characteristics of each area, including the number of branches of the power line network in each area and the equipment density of each area, wherein the equipment density refers to the ratio of the equipment outline in each area to the area of ​​the area, which can be identified by the distributed image data, and this will not be repeated.

[0070] Specifically, there is no limitation on the specific structures of the abnormality analysis module, path identification module, abnormality identification module, calling module, data display module and early warning module, and they themselves or each unit therein can be composed of logical components or a combination of logical components, and the logical components include a field programmable processor, a computer or a microprocessor in a computer.

[0071] Specifically, the abnormal analysis module is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, including:

[0072] The sum of the ratio of the number of forks of the power line network to the threshold value of the number of forks and the ratio of the device density to the threshold value of the device density is used as the first transmission feature;

[0073] Using the ratio of the burst noise intensity to the intensity threshold as the second transmission feature;

[0074] The first transmission characteristic and the second transmission characteristic are weightedly summed to obtain a transmission interference characterization value.

[0075] It is understandable that the power line signal transmission process usually involves branch transmission or multi-path transmission. In some cases, the signal is transmitted from the main transmission path to the forked node and then processed and can be transmitted by multiple transmission paths, namely the forked transmission path, which will not be elaborated here.

[0076] In this embodiment, when performing weighted summation, the weight of the first transmission feature is set to 0.55, and the weight of the second transmission feature is set to 0.45;

[0077] The threshold of the number of bifurcations, the threshold of the equipment density and the threshold of the sudden noise intensity of the power line network are pre-set, and the relevant historical data of the power systems in several regions completing data signal transmission several times are obtained. The data of the number of bifurcations, the data of the equipment density and the sudden noise intensity of the power line network in each region are called, and the average number of bifurcations, the average equipment density and the average sudden noise intensity of the power line network in each region are solved. The threshold of the number of bifurcations is set to 1.01 to 1.03 times the average number of bifurcations, the threshold of the equipment density is set to 1.06 to 1.11 times the average equipment density, and the threshold of the sudden noise intensity is set to 1.14 to 1.23 times the average sudden noise intensity.

[0078] The present invention determines the transmission interference characterization value of the power line network in the area through environmental characteristics combined with the corresponding sudden noise intensity. During the data signal transmission process of the power line network, by timely capturing the interference factors that may affect the transmission quality of the data signal in the power line, such as the interference of sudden noise and the interference caused by the change of equipment in the area, these interference factors can be used to comprehensively evaluate the degree of abnormal tendency caused by interference in the data signal transmission in the area.

[0079] It is understandable that when data signals are transmitted in areas with high equipment density and a large number of route forks in the power line network, the interference caused by noise on signal transmission will be amplified, and the risk of transmission failure in this area will also increase. At the same time, there is a greater tendency for abnormalities to occur in the connection parts of the paths such as between the forked transmission paths and between the forked transmission paths and the main transmission path;

[0080] Therefore, the transmission interference characterization value is used to characterize the abnormal risk level of the power line network in each area of ​​the power system during transmission work, which provides data support for the subsequent determination of the abnormal tendency category of the power line network in each area for transmission work, and helps to discover potential risk areas in advance. For example, areas with sudden increases in noise intensity and more complex environmental characteristics are more likely to have risks than other areas, and timely identify path areas where faults may occur. Then, the data signal transmission in the area is analyzed, which effectively reduces the occurrence of faults during the transmission process and avoids the scope and degree of impact of local area faults on the entire power system.

[0081] Specifically, the abnormal analysis module is used to determine the abnormal tendency category of the power line network in each area for transmission work, including:

[0082] If the transmission interference characterization value is greater than or equal to the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is classified as an abnormal tendency;

[0083] If the transmission interference characterization value is less than the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is a non-abnormal tendency category.

[0084] The transmission interference characterization threshold is selected in the interval [1.59,1.64].

[0085] Specifically, the calling module is used to call the path identification module and the abnormality discrimination module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category, including:

[0086] If there is an abnormal tendency of the power line network in any area to perform transmission work as an abnormal tendency category, the path identification module and the abnormal identification module are called.

[0087] It can be understood that after calling the path identification module and the abnormality identification module, each module performs its corresponding function, and then analyzes the data signal transmission of the power line network in the area, for example:

[0088] The path identification module starts to determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, so as to identify the corresponding offset bifurcated transmission path;

[0089] The abnormality identification module identifies whether it is necessary to adjust the carrier frequency band of the data signal in each branched transmission path, which will not be described in detail.

[0090] Specifically, the path identification module is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area and analyze the transmission parameters, including:

[0091] Using the ratio of the load quantity on the forked transmission path to the load quantity threshold as the first interference feature;

[0092] Using a ratio of an average of the maximum rated powers of the loads on the bifurcated transmission path to a power threshold as a second interference feature;

[0093] The sum of the first interference characteristic and the second interference characteristic is determined as a transmission parameter.

[0094] In this embodiment, the load quantity threshold on the forked transmission path and the maximum rated power threshold of each load are pre-set, and interference characteristics on several forked transmission paths are obtained as samples. The load quantity data on the forked transmission path and the corresponding maximum rated power data of each load are extracted, and the mean value of the load quantity and the mean value of the maximum rated power of each load are solved. The load quantity threshold is set to 1.02 to 1.06 times the mean value of the load quantity, and the maximum rated power threshold of each load is set to 1.08 to 1.19 times the mean value of the total load power.

[0095] Specifically, the path identification module is used to determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and the identification of the corresponding offset bifurcated transmission path includes:

[0096] If the transmission parameter corresponding to the bifurcated transmission path is greater than or equal to the transmission parameter standard threshold, it is determined that the data signal transmission of the bifurcated transmission path does not meet the transmission standard;

[0097] If the transmission parameter is less than the transmission parameter standard threshold, it is determined that the data signal transmission of the bifurcated transmission path meets the transmission standard;

[0098] The method is used to determine a bifurcated transmission path that does not meet the transmission standard as an offset bifurcated transmission path.

[0099] The standard threshold of the transmission parameter is selected in the interval [1.75,1.82].

[0100] It can be understood that during the data signal transmission process, the branch lines corresponding to the areas through which the data signals pass are changing and non-uniform. Therefore, along with the data signal transmission, the corresponding transmission lines are in a dynamic change situation, and the number of loads on each branch line through which the data signal passes and the average maximum rated power of each load are also changing. The change of load will cause the electrical characteristics of the power line to change accordingly, especially for high-power loads. The above phenomenon is even more serious, for example, voltage fluctuations and current changes, etc. These changes may introduce electromagnetic interference noise, and may also affect the transmission characteristics of the power line for data signals of different frequencies, such as fluctuations in the data signal transmission rate and fluctuations in the data signal strength. At the same time, the change in the maximum rated power of different loads will also aggravate the above impact. Therefore, in this embodiment, the number of loads on each branch path and the average maximum rated power of each load are determined as interference features that affect the data signal transmission, and the branched transmission path where the data signal transmission is interfered is identified according to the strength of the interference feature and confirmed as an offset branched transmission path.

[0101] Specifically, the abnormal identification module is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate, including:

[0102] to calculate the relative variance of the data signal strength of the offset bifurcated transmission path as the first transmission feature;

[0103] used to calculate the relative variance of the data signal transmission rate as a second transmission feature;

[0104] Used to determine the sum of the first transmission characteristic and the second transmission characteristic as a carrier transmission anomaly characterization coefficient.

[0105] It can be understood that relative variance is usually used to compare the relative dispersion of data sets with different units or dimensions, and is obtained by calculating the ratio of the standard deviation to the mean.

[0106] In this embodiment, the corresponding relative variance is obtained by respectively calculating the ratio of the standard deviation of the data signal strength of the offset bifurcated transmission path and the standard deviation of the data signal transmission rate to the corresponding mean.

[0107] It can be understood that two characteristics of data signal transmission that are prone to fluctuations due to interference are extracted, including the strength of the data signal and the data signal transmission rate. The degree of fluctuation of the data signal in the offset bifurcation path is characterized according to the variance of the two characteristics. The degree of transmission abnormality in the transmission process is comprehensively analyzed to ensure the accuracy of abnormality identification.

[0108] The present invention conducts targeted analysis on the transmission work of the power line network in the corresponding area under the abnormal tendency category, and analyzes the transmission parameters through the interference characteristics of the bifurcated transmission path. In actual situations, the layout of the bifurcated path of the power line network has a certain degree of influence and interference on the transmission of the signal. When the data signal is transmitted in the power line network, the large number of loads on the bifurcated transmission path of the data signal transmission path and the high average maximum rated power of each load will lead to an increase in the interference degree of the transmission process. When the interference degree caused by the above factors reaches a certain degree, it means that the current data signal transmission of the bifurcated path does not meet the transmission standard. In this case, the transmission of the data signal will reduce the quality of the data signal and there may be potential abnormal risks.

[0109] Specifically, during the transmission process, the data signal will pass through different power line network areas, and the line paths it passes through will also be different. Since the loads on different line paths are different, and because the transmission of data signals is a dynamic process, when the load of the path line changes, it will affect the transmission rate of the data signal in the power line, and may even affect the stability of the load equipment, thereby enhancing electromagnetic interference. Furthermore, the bifurcated transmission path that does not meet the transmission standard is identified as an offset bifurcated transmission path, and a more detailed analysis of the path is performed to further and more accurately determine the degree of abnormality in the data signal transmission, and the carrier transmission abnormality characterization coefficient is analyzed through the data signal strength and data signal transmission rate of the path.

[0110] Specifically, during the data signal transmission process, if the carrier frequency band interacts with other signals or noise in the surrounding environment and generates intermittent electromagnetic interference, the data signal strength during transmission may become unstable and fluctuating, which may make it difficult for the receiving end to correctly parse the received data signal, or even cause the received data signal to be missing, thereby reducing the quality of the data signal. At the same time, if the channel environment in which the carrier frequency band is located is unstable and there is time-varying interference or multipath effects, the data signal transmission rate may also be unstable.

[0111] Therefore, the present application uses a carrier anomaly characterization coefficient to characterize the degree of inadaptability of the carrier frequency band in which the data signal in the current transmission process is located and the degree of fluctuation of relevant influencing indicators of the data signal during the transmission process, so as to facilitate subsequent timely adjustments to ensure the quality of data signal transmission. For example, when the carrier frequency band is subject to excessive interference or signal attenuation, the data signal strength is in an unstable fluctuation and the signal strength continues to decrease, which will also cause the data signal transmission rate to be in an unstable fluctuation. In these cases, by adjusting the carrier frequency band, the signal can avoid these interference factors and obtain a more stable data signal transmission strength and a stable transmission rate, thereby avoiding extending the time it takes for the data signal to reach the receiving end and ensuring the quality of the data signal received by the receiving end. The present application analyzes the above-mentioned situations and related interference factors, and reasonably and targetedly adjusts and optimizes the distribution of the carrier frequency band.

[0112] Specifically, the abnormality identification module is used to identify whether it is necessary to adjust the carrier frequency band of the data signal in each forked transmission path, including:

[0113] If the carrier transmission abnormality characterization coefficient is greater than or equal to the carrier transmission abnormality characterization coefficient threshold, it is necessary to adjust the carrier frequency band of the data signal in each forked transmission path;

[0114] If the carrier transmission abnormality characterization coefficient is less than the carrier transmission abnormality characterization coefficient threshold, there is no need to adjust the carrier frequency band of the data signal in each branched transmission path.

[0115] The carrier transmission anomaly characterization coefficient threshold is selected in the interval [0.25, 0.43].

[0116] The present invention optimizes and improves the transmission quality of data signals in the power line network by comprehensively adjusting the carrier frequency bands of data signals in each branched transmission path. It does not adjust the carrier frequency bands of data signals in the offset branched paths with abnormal risks alone, but accurately determines whether there are abnormal risks in the power line network and the local or overall extent covered by the abnormal risks based on the characteristics presented by the above paths during the data signal transmission process. Then, the carrier frequency bands of data signals in the entire power line network are adjusted. For example, the data signal is modulated to a frequency band with less signal attenuation through a filter, thereby restoring the data signal strength; the data signal is modulated to a frequency band with more suitable bandwidth and less interference through a filter, thereby improving the data signal transmission rate to ensure the stability and quality of the overall data signal transmission.

[0117] Specifically, it also includes a data display module, which is connected to the abnormality identification module and is used to display corresponding content based on the analysis result of the abnormality identification module;

[0118] The corresponding content includes the area corresponding to the bifurcated transmission path that needs to be adjusted and the current carrier frequency band of the data signal in the bifurcated transmission path.

[0119] Specifically, it also includes an early warning module, which responds to the determination result of the abnormality analysis module.

[0120] If the abnormal analysis module determines that the abnormal tendency of the power line network in transmission work is an abnormal tendency category, an early warning signal is issued.

[0121] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A power line communication system based on multi-carrier aggregation technology, characterized in that: include: A feature collection module, comprising a noise collection unit arranged at a power line connection position for collecting the intensity of sudden noise and a data collection unit for collecting interference features of each bifurcated transmission path; An image storage module, used to store distribution image data of several areas of the power system, and determine the environmental characteristics of each area according to the distribution image data; an abnormality analysis module, which is connected to the feature acquisition module and the image storage module respectively, and is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, so as to determine the abnormal tendency category of the power line network in each area for transmission work; A path identification module, which is connected to the abnormality analysis module, is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area to analyze the transmission parameters, determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and identify the corresponding offset bifurcated transmission path; an abnormality identification module, which is connected to the path identification module and is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate, so as to identify whether it is necessary to adjust the carrier frequency band of the data signal in each bifurcated transmission path; A calling module connected to the abnormality analysis module for calling the path identification module and the abnormality identification module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category; The interference characteristics include the number of loads on each of the bifurcated transmission paths and the average of the rated maximum power of each of the loads, and the environmental characteristics include the number of bifurcations of the power line network in each of the areas and the equipment density in each of the areas; The abnormal analysis module is used to determine the abnormal tendency category of the power line network in each area for transmission work, including: If the transmission interference characterization value is greater than or equal to the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is classified as an abnormal tendency; If the transmission interference characterization value is less than the transmission interference characterization threshold, the abnormal tendency of the power line network in the area to perform transmission work is a non-abnormal tendency category.

2. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The abnormal analysis module is used to determine the transmission interference characterization value of the power line network in the area based on the environmental characteristics of each area combined with the corresponding sudden noise intensity, including: The sum of the ratio of the number of forks of the power line network to the threshold value of the number of forks and the ratio of the device density to the threshold value of the device density is used as the first transmission feature; Using the ratio of the burst noise intensity to the intensity threshold as the second transmission feature; The first transmission characteristic and the second transmission characteristic are weightedly summed to obtain a transmission interference characterization value.

3. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The calling module is used to call the path identification module and the abnormality discrimination module to analyze the data signal transmission of the power line network in the area based on the abnormal tendency as the abnormal tendency category, including: If there is an abnormal tendency of the power line network in any area to perform transmission work as an abnormal tendency category, the path identification module and the abnormal identification module are called.

4. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The path identification module is used to obtain the interference characteristics of each of the bifurcated transmission paths in the area and analyze the transmission parameters, including: Using the ratio of the load quantity on the forked transmission path to the load quantity threshold as the first interference feature; Using a ratio of an average of the maximum rated powers of the loads on the bifurcated transmission path to a power threshold as a second interference feature; The sum of the first interference characteristic and the second interference characteristic is determined as a transmission parameter.

5. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The path identification module is used to determine whether the data signal transmission of the bifurcated transmission path meets the transmission standard, and the corresponding offset bifurcated transmission path is identified, including: If the transmission parameter corresponding to the bifurcated transmission path is greater than or equal to the transmission parameter standard threshold, it is determined that the data signal transmission of the bifurcated transmission path does not meet the transmission standard; The method is used to determine a bifurcated transmission path that does not meet the transmission standard as an offset bifurcated transmission path.

6. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The abnormal identification module is used to analyze the carrier transmission abnormality characterization coefficient according to the data signal strength of the offset bifurcated transmission path and the data signal transmission rate, including: to calculate the relative variance of the data signal strength of the offset bifurcated transmission path as the first transmission feature; used to calculate the relative variance of the data signal transmission rate as a second transmission feature; Used to determine the sum of the first transmission characteristic and the second transmission characteristic as a carrier transmission anomaly characterization coefficient.

7. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: The abnormality identification module is used to identify whether it is necessary to adjust the carrier frequency band of the data signal in each bifurcated transmission path, including: If the carrier transmission abnormality characterization coefficient is greater than or equal to the carrier transmission abnormality characterization coefficient threshold, it is necessary to adjust the carrier frequency band of the data signal in each branched transmission path.

8. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: It also includes a data display module, which is connected to the abnormality identification module and is used to display corresponding content based on the analysis result of the abnormality identification module; The corresponding content includes the area corresponding to the bifurcated transmission path that needs to be adjusted and the current carrier frequency band of the data signal in the bifurcated transmission path.

9. The power line communication system based on multi-carrier aggregation technology according to claim 1, characterized in that: It also includes an early warning module, which responds to the determination result of the abnormality analysis module. If the abnormal analysis module determines that the abnormal tendency of the power line network in transmission work is an abnormal tendency category, an early warning signal is issued.

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