A multi-channel power line carrier communication system

Abstract

The present invention relates to the field of carrier communication technology, and in particular to a multi-channel power line carrier communication system, which includes a data acquisition module, a first determination module, a second determination module, a judgment module, a selection module, a sending module, and a correction module. The present invention can effectively cope with complex environmental changes in the power network through precise data acquisition and real-time judgment mechanisms, ensure the stability and efficiency of communication, and through multi-level screening and judgment, preferably select channels with optimal parameters such as signal strength, noise, and delay, effectively avoid interference and channels with large noise, and improve the reliability of communication. At the same time, the correction module can adjust the strength threshold in real time to ensure that the system still maintains excellent communication performance when the number of channels fluctuates and the network load changes, effectively solving the problem of inaccurate channel selection and deviation in verification results due to low attention to the impact of real-time environmental changes on signal quality.

Description

Technical Field

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

[0002] With the continuous expansion of power networks, power line carrier communication technology plays an increasingly important role in modern power systems. By using existing power lines as data transmission media, it not only saves the cost of laying additional communication facilities, but also enables remote monitoring and control of equipment. In practical applications, there are often multiple physical communication channels in power networks, such as different power supply lines, transformer networks, and power transmission paths between various types of power equipment. Due to the differences in power equipment and network structure, the signal quality and transmission characteristics of these channels are different, and they are easily affected by factors such as noise, interference, and signal attenuation, resulting in unstable communication quality.

[0003] Patent document with patent publication number CN112953598A discloses a multi-channel power line carrier communication system, which includes: a signal monitoring module, a transmission test module, a quality test module, a verification login module, a data receiving module, a data processing module, a verification database, a master control module and an information sending module; the signal monitoring module is used to monitor the signal information of each accessed communication channel and send the signal information to the transmission test module and the quality test module; the transmission test module is used to test the transmission speed of the received signal information and generate a speed test ranking result; the quality test module is used to test the transmission quality of the received signal information and generate a quality test ranking result; the verification login module is used to authenticate the identity of the person using the system, and the verification database stores the information allowed to use the system. The preset verification coefficient information of the system personnel is used; the data receiving module is used to receive the real-time verification coefficient information, speed test ranking results and test ranking results obtained when the verification login module verifies the identity of the login personnel; the real-time verification coefficient information, speed test ranking results and test ranking results are all sent to the data processing module; after the data processing module receives the real-time verification coefficient information, it retrieves the preset verification coefficient from the verification database, compares the real-time verification coefficient information with the preset verification coefficient to generate verification pass information; the data processing module processes the preset verification coefficient and the real-time verification coefficient information to generate verification pass information, and the data processing module processes the speed test ranking results and the test ranking results to generate recommended channel information; the master control module controls the information sending module to send the recommended channel information out.

[0004] It can be seen that the multi-channel power line carrier communication system has the following problems: the system relies on the signal monitoring and quality testing module to select the communication channel, and pays little attention to the impact of real-time environmental changes on signal quality, resulting in inaccurate channel selection; secondly, although the system's verification login module can verify the user's identity, it performs static adjustments in response to changes in the network environment, resulting in deviations in verification results in complex environments. Summary of the invention

[0005] To this end, the present invention provides a multi-channel power line carrier communication system, which is used to overcome the problems in the prior art of inaccurate channel selection and deviation in verification results due to low attention to the impact of real-time environmental changes on signal quality by introducing dynamic environment perception and real-time adjustment mechanism.

[0006] To achieve the above object, the present invention provides a multi-channel power line carrier communication system, comprising:

[0007] A data acquisition module is used to collect the real-time carrier signal strength, real-time noise level and real-time channel delay value at the acquisition point on each target channel in the power network area;

[0008] A first determination module, connected to the data acquisition module, for determining a plurality of first temporary channels according to the real-time carrier signal strength and a preset strength threshold;

[0009] a second determination module, connected to the data acquisition module and the first determination module respectively, for determining a number of second temporary channels according to the real-time noise level of each of the first temporary channels;

[0010] A determination module, which is connected to the data acquisition module and the second determination module respectively, and is used to determine a number of independent channels according to the real-time carrier signal strengths of any two adjacent second temporary channels within a preset determination time period;

[0011] A selection module, which is connected to the determination module and the data acquisition module respectively, and is used to select a number of power channels according to the position distance between any two adjacent independent channels and the real-time channel delay value within a preset adjustment time;

[0012] A sending module, connected to the selection module, for sending a transmission signal according to all the power channels;

[0013] A correction module is connected to the first determination module and the selection module respectively, and is used to correct the preset intensity threshold according to the number of all the power channels within a preset correction time.

[0014] Furthermore, the determination module includes:

[0015] A strength fluctuation calculation unit, used for calculating the standard deviation of the real-time carrier signal strength of each of the second temporary channels to form a strength fluctuation value;

[0016] a deviation calculation unit connected to the intensity fluctuation calculation unit, for calculating a relative deviation of the intensity fluctuation values ​​of any two adjacent second temporary channels to form a change consistency;

[0017] A determination unit is connected to the deviation calculation unit and is used to determine a number of independent channels according to the change consistency.

[0018] Furthermore, the determination unit includes:

[0019] A consistency comparison subunit, used to compare the change consistency with a preset consistency threshold to form a consistency comparison result;

[0020] A determination subunit is connected to the consistency comparison subunit, and is used to determine that the second temporary channel is the independent channel to form a plurality of independent channels when the change consistency is greater than the preset consistency threshold.

[0021] Furthermore, the selection module includes:

[0022] A measuring unit, used for measuring the distance between any two adjacent monitoring points on the independent channels to form a position distance;

[0023] A delay fluctuation calculation unit, used to calculate the relative deviation of the standard deviation of the real-time channel delay values ​​of any two adjacent independent channels to form a delay fluctuation deviation;

[0024] A selection unit is connected to the measuring unit and the delay fluctuation calculation unit respectively, and is used to select a plurality of power channels according to the position distance and the delay fluctuation value.

[0025] Furthermore, the selection unit includes:

[0026] A distance comparison subunit, used to compare the position distance with a preset distance threshold to form a distance comparison result;

[0027] A fluctuation deviation comparison subunit, used to compare the delay fluctuation deviation with a preset fluctuation deviation threshold to form a fluctuation deviation comparison result;

[0028] A selection subunit is respectively connected to the distance comparison subunit and the fluctuation deviation comparison subunit, and is used to select the corresponding two adjacent independent channels as power channels when the distance comparison result is that the position distance is less than the preset distance threshold, and the fluctuation deviation comparison result is that the delayed fluctuation deviation is less than the preset fluctuation deviation threshold.

[0029] Furthermore, the selection subunit is further configured to select the corresponding two adjacent independent channels as power channels when the distance comparison result shows that the position distance is greater than or equal to the preset distance threshold.

[0030] Furthermore, the correction module includes:

[0031] A quantity fluctuation calculation unit, used to calculate the standard deviation of the quantity of all the power channels to form a quantity fluctuation value;

[0032] A correction unit is connected to the quantity fluctuation calculation unit and is used to correct the preset intensity threshold according to the quantity fluctuation value and the preset quantity fluctuation threshold when the quantity fluctuation value is greater than the preset quantity fluctuation threshold.

[0033] Furthermore, the correction unit comprises:

[0034] A quantity fluctuation deviation calculation subunit, used to calculate the relative deviation between the quantity fluctuation value and the preset quantity fluctuation threshold value to form a quantity fluctuation deviation;

[0035] A correction subunit is connected to the quantity fluctuation deviation calculation subunit, and is used to reduce the preset intensity threshold according to the quantity fluctuation deviation and the preset correction coefficient when the quantity fluctuation deviation is greater than the preset correction deviation, and to increase the preset intensity threshold according to the quantity fluctuation deviation and the preset correction coefficient when the quantity fluctuation deviation is less than or equal to the preset correction deviation.

[0036] Furthermore, the first determining module includes:

[0037] A strength comparison unit, used to compare the real-time carrier signal strength with the preset strength threshold to form a strength comparison result;

[0038] A first determination unit is connected to the strength comparison unit, and is used to determine that the target channel is the first temporary channel when the strength comparison result is that the real-time carrier signal strength is greater than the preset strength threshold.

[0039] Furthermore, the second determining module includes:

[0040] A noise comparison unit, used to compare the real-time noise level with a preset noise threshold to form a noise comparison result;

[0041] A second determination unit is connected to the noise comparison unit, and is used to determine that the first temporary channel is the second temporary channel when the noise comparison result shows that the real-time noise level is less than the preset noise threshold.

[0042] Compared with the prior art, the beneficial effect of the present invention lies in that, through precise data collection and real-time judgment mechanism, it can effectively cope with complex environmental changes in the power network, ensure the stability and efficiency of communication, and through multi-level screening and judgment, select the channel with the best parameters such as signal strength, noise, delay, etc., effectively avoid interference and channels with large noise, and improve the reliability of communication. At the same time, the correction module can adjust the strength threshold in real time to ensure that the system maintains excellent communication performance when the number of channels fluctuates and the network load changes. In addition, the system optimizes the selection of power channels through a comprehensive evaluation of location distance and delay fluctuations, reduces signal transmission errors, further improves the accuracy and efficiency of data transmission, and effectively solves the problems of inaccurate channel selection and deviation in verification results due to low attention to the impact of real-time environmental changes on signal quality.

[0043] Furthermore, by calculating the consistency of signal strength fluctuations, channels with better signal stability can be effectively identified and selected as independent channels, ensuring the quality and stability of the selected channels during communication and improving the anti-interference ability and reliability of the system.

[0044] Furthermore, by setting a consistency comparison subunit and a determination subunit, channels with higher signal fluctuation stability can be accurately screened out, reducing the possibility of misselecting unstable channels.

[0045] Furthermore, by considering the distance relationship between channels and comprehensively evaluating the stability of delay fluctuations, it is ensured that the selected power channel can provide high-quality and stable signal transmission. Even at a long distance, the normal operation of the power channel can be ensured.

[0046] Furthermore, through the calculation of quantity fluctuations and threshold correction, the correction module can dynamically adjust the strength threshold, thereby effectively avoiding signal instability or misjudgment caused by excessive fluctuations in the number of power channels. This function can improve the adaptability and stability of the power communication system, ensuring that the system can still work normally and maintain good communication quality when the number of channels changes.

[0047] Furthermore, by dynamically adjusting the preset strength threshold, it can adapt to the fluctuation of the actual network, improve the adaptability of the system to environmental changes, and avoid system imbalance caused by an overly fixed strength threshold.

[0048] Furthermore, by correcting the preset strength threshold, the module can optimize channel selection in real time in a dynamic environment, improve the stability and reliability of the communication system, and reduce the impact of channels with poor signals on the overall system performance.

[0049] Furthermore, by excluding channels with excessively high noise levels, the communication quality is optimized and data transmission errors due to noise interference are avoided. By combining noise thresholds for screening, the anti-interference capability of the communication system can be effectively improved, ensuring that the system can maintain stable performance in a complex power network environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of a multi-channel power line carrier communication system according to this embodiment;

[0051] Figure 2 A determination logic diagram of an independent channel determined by a determination subunit in this embodiment;

[0052] Figure 3 A decision logic diagram for selecting a power channel for the selection subunit in this embodiment;

[0053] Figure 4 This is a decision logic diagram for correcting the preset intensity threshold value by the correction unit in this embodiment. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0057] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] See also Figure 1As shown, it is a schematic diagram of the multi-channel power line carrier communication system of this embodiment;

[0059] This embodiment provides a multi-channel power line carrier communication system, including:

[0060] A data acquisition module is used to collect the real-time carrier signal strength, real-time noise level and real-time channel delay value at the acquisition point on each target channel in the power network area;

[0061] A first determination module, connected to the data acquisition module, for determining a plurality of first temporary channels according to the real-time carrier signal strength and a preset strength threshold;

[0062] a second determination module, connected to the data acquisition module and the first determination module respectively, for determining a number of second temporary channels according to the real-time noise level of each of the first temporary channels;

[0063] A determination module, which is connected to the data acquisition module and the second determination module respectively, and is used to determine a number of independent channels according to the real-time carrier signal strengths of any two adjacent second temporary channels within a preset determination time period;

[0064] A selection module, which is connected to the determination module and the data acquisition module respectively, and is used to select a number of power channels according to the position distance between any two adjacent independent channels and the real-time channel delay value within a preset adjustment time;

[0065] A sending module, connected to the selection module, for sending a transmission signal according to all the power channels;

[0066] A correction module is connected to the first determination module and the selection module respectively, and is used to correct the preset intensity threshold according to the number of all the power channels within a preset correction time.

[0067] The target channel refers to a specific frequency band or line path selected by the data acquisition module for signal transmission and communication in the power line carrier communication system. Each target channel corresponds to a transmission path on the power line. The system monitors and evaluates the carrier signal strength, noise level and delay value of these channels to ensure communication quality.

[0068] Real-time carrier signal strength refers to the signal strength of a target channel on the power network measured in real time in the power line carrier communication system. It is usually expressed as the voltage or power of the signal, reflecting the strength of the signal and directly affecting the reliability of communication. Real-time noise level refers to the noise intensity caused by the power line itself and external interference sources in the same channel. It is usually expressed as the noise power spectrum density. The higher the noise level, the worse the communication quality. The real-time channel delay value refers to the time required for the signal to propagate in the channel from the transmitter to the receiver. It reflects the propagation speed of the signal and the responsiveness of the channel. Too much delay will cause communication delay and data packet loss.

[0069] The data acquisition module collects the carrier signal strength, noise level and channel delay value on the target channel in real time by deploying multiple monitoring points in the power network area. Each monitoring point is equipped with sensors and data acquisition equipment, which can continuously measure the signal strength, noise interference and channel delay. These data are transmitted to the data acquisition module in real time through the communication network for centralized processing and analysis. The carrier signal strength is obtained by the amplitude change of the received signal, the noise level is determined by analyzing the ratio of background noise to effective signal, and the channel delay value is determined by measuring the time difference of signal propagation. These real-time data provide a basic basis for subsequent channel screening, judgment and correction.

[0070] The preset strength threshold refers to the lower limit of the signal strength set in the system, which is used to determine whether the carrier signal is valid. It usually depends on the communication capability of the system and the environmental noise level, and is usually set between 20dB-50dB; in this embodiment, it is set to 30dB to ensure that the signal is strong enough to support stable communication and avoid low-intensity signals affecting system performance.

[0071] The preset judgment time refers to the time period used to determine whether the target channel meets the conditions, which usually depends on the stability of the signal fluctuation and is generally set to 1 second to 5 seconds; in this embodiment, it is set to 3 seconds, which can balance real-time and accuracy and avoid short-term fluctuations interfering with judgment.

[0072] The preset adjustment time refers to the time period considered when adjusting the power channel selection, which is usually set to several seconds to tens of seconds in order to effectively correct the delay fluctuation. In this embodiment, it is set to 10 seconds to ensure that the trend of delay changes is smooth and avoid system instability caused by frequent adjustments.

[0073] The preset correction duration refers to the time range considered when correcting the strength threshold, which is usually set based on the dynamic characteristics of the system and fluctuations in the communication environment, and is usually from several seconds to several minutes. In this embodiment, it is set to 30 seconds, which helps to smoothly correct the threshold and prevent threshold instability due to short-term fluctuations.

[0074] An independent channel refers to a channel in a power line carrier communication system that can communicate stably after being determined by specific parameters such as signal strength, noise level, and delay. Each independent channel can meet certain requirements in terms of signal quality and transmission stability, and will not be interfered by adjacent channels, ensuring the reliability and accuracy of data transmission.

[0075] The sending module determines the most suitable transmission path according to the power channel selected by the selection module, and sends the transmission signal through the selected power channel. In this process, the sending module selects the power channel with the best signal quality and stability according to the information provided by the selection module, thereby ensuring that the transmission signal can reach the target receiving end in the best state.

[0076] First, the data acquisition module is used to monitor the carrier signal strength, noise level and channel delay value on the target channel in real time. The system selects several first temporary channels based on the signal strength and the preset threshold, and then further determines the second temporary channel based on the noise level. Through the judgment module, the system determines which channels can be used as independent channels based on the signal strength fluctuations of adjacent channels. The selection module evaluates the distance between channels and the delay fluctuation value, and finally selects the best power channel for signal transmission. The correction module dynamically adjusts the strength threshold by correcting the fluctuation of the number of channels to ensure the stability of channel selection and communication quality.

[0077] Through precise data collection and real-time judgment mechanism, it can effectively respond to complex environmental changes in the power network and ensure the stability and efficiency of communication. Through multi-level screening and judgment, channels with optimal parameters such as signal strength, noise, and delay are selected, effectively avoiding channels with large interference and noise, and improving the reliability of communication. At the same time, the correction module can adjust the strength threshold in real time to ensure that the system maintains excellent communication performance when the number of channels fluctuates and the network load changes. In addition, the system optimizes the selection of power channels through a comprehensive evaluation of location distance and delay fluctuations, reduces signal transmission errors, and further improves the accuracy and efficiency of data transmission, effectively solving the problems of inaccurate channel selection and deviation in verification results due to low attention to the impact of real-time environmental changes on signal quality.

[0078] Specifically, the determination module includes:

[0079] A strength fluctuation calculation unit, used for calculating the standard deviation of the real-time carrier signal strength of each of the second temporary channels to form a strength fluctuation value;

[0080] a deviation calculation unit connected to the intensity fluctuation calculation unit, for calculating a relative deviation of the intensity fluctuation values ​​of any two adjacent second temporary channels to form a change consistency;

[0081] A determination unit is connected to the deviation calculation unit and is used to determine a number of independent channels according to the change consistency.

[0082] The determination module first calculates the standard deviation of the real-time carrier signal strength of each second temporary channel through the strength fluctuation calculation unit to obtain the strength fluctuation value. Then, the deviation calculation unit calculates the strength fluctuation values ​​of any two adjacent second temporary channels to obtain the relative deviation between them, thereby forming a change consistency. Finally, the determination unit determines which second temporary channels can be considered as independent channels, that is, channels with consistent and relatively stable signal strength fluctuations, based on the change consistency.

[0083] By calculating the consistency of signal strength fluctuations, channels with better signal stability can be effectively identified and selected as independent channels, ensuring the quality and stability of the selected channels during communication and improving the system's anti-interference ability and reliability.

[0084] Please continue reading Figure 2 As shown, it is a decision logic diagram of the decision subunit for deciding an independent channel in this embodiment;

[0085] Specifically, the determination unit includes:

[0086] A consistency comparison subunit, used to compare the change consistency with a preset consistency threshold to form a consistency comparison result;

[0087] A determination subunit is connected to the consistency comparison subunit, and is used to determine that the second temporary channel is the independent channel to form a plurality of independent channels when the change consistency is greater than the preset consistency threshold.

[0088] The preset consistency threshold is a standard value used to determine whether the second temporary channel has signal fluctuation consistency. It depends on the stability requirements of the target communication system, the noise level of the channel environment, and the error tolerance of the actual application scenario. It is usually set between 0.1 and 0.5. In this embodiment, it is set to 0.3, which can balance the system's requirements for fluctuation consistency and the flexibility of signal transmission, and avoid being too strict and resulting in overly conservative channel selection.

[0089] The determination unit compares the calculated change consistency with the preset consistency threshold through the consistency comparison subunit to generate a consistency comparison result. Subsequently, the determination subunit makes a judgment based on the comparison result. When the change consistency is greater than the preset consistency threshold, it is confirmed that the second temporary channel has signal fluctuation stability and is determined as an independent channel, thereby generating a group of independent channels.

[0090] By setting the consistency comparison subunit and the judgment subunit, channels with higher signal fluctuation stability can be accurately screened out, reducing the possibility of misselecting unstable channels.

[0091] Specifically, the selection module includes:

[0092] A measuring unit, used for measuring the distance between any two adjacent monitoring points on the independent channels to form a position distance;

[0093] A delay fluctuation calculation unit, used to calculate the relative deviation of the standard deviation of the real-time channel delay values ​​of any two adjacent independent channels to form a delay fluctuation deviation;

[0094] A selection unit is connected to the measuring unit and the delay fluctuation calculation unit respectively, and is used to select a plurality of power channels according to the position distance and the delay fluctuation value.

[0095] The distance between the monitoring points of any two adjacent independent channels is measured by the measuring unit to form the position distance, and the relative deviation of the standard deviation of the real-time channel delay value is calculated by the delay fluctuation calculation unit to form the delay fluctuation deviation. The selection unit combines the results of the position distance and the delay fluctuation deviation to screen out several power channels that meet the conditions for further transmission of communication signals.

[0096] Please continue reading Figure 3 As shown, it is a decision logic diagram of the selection subunit selecting the power channel in this embodiment;

[0097] Specifically, the selection unit includes:

[0098] A distance comparison subunit, used to compare the position distance with a preset distance threshold to form a distance comparison result;

[0099] A fluctuation deviation comparison subunit, used to compare the delay fluctuation deviation with a preset fluctuation deviation threshold to form a fluctuation deviation comparison result;

[0100] A selection subunit is respectively connected to the distance comparison subunit and the fluctuation deviation comparison subunit, and is used to select the corresponding two adjacent independent channels as power channels when the distance comparison result is that the position distance is less than the preset distance threshold, and the fluctuation deviation comparison result is that the delayed fluctuation deviation is less than the preset fluctuation deviation threshold.

[0101] Specifically, the selection subunit is further configured to select the corresponding two adjacent independent channels as power channels when the distance comparison result shows that the position distance is greater than or equal to the preset distance threshold.

[0102] The preset distance threshold refers to the maximum allowable distance between two independent channels when selecting a power channel. It depends on the coverage of the communication system, the stability of the channel, and the network structure. It is usually set between several hundred meters and several kilometers, depending on the scale of the network and the communication requirements. In this embodiment, it is set to 500 meters, which helps to ensure that the power channels do not lose signal quality due to being too far away, while covering a wide enough area to avoid signal interference or repeated selection due to being too close.

[0103] The preset fluctuation deviation threshold refers to the standard value used to determine whether the delay fluctuation is reasonable when selecting the power channel. It depends on the system's tolerance to delay fluctuations, the real-time requirements of the communication system, and the load of the channel. It is usually set between 0 milliseconds and 10 milliseconds. In this embodiment, it is set to 3 milliseconds, which can balance the system's tolerance to delay and the stability of channel selection, and avoid excessive fluctuations affecting communication quality.

[0104] Adjacent independent channels are evaluated by the distance comparison subunit and the fluctuation deviation comparison subunit. First, the distance comparison subunit compares the actual distance of the channel location with the preset distance threshold to determine whether the distance requirement is met. Next, the fluctuation deviation comparison subunit compares the delay fluctuation deviation of the channel with the preset fluctuation deviation threshold to evaluate whether the delay fluctuation is within a reasonable range. When both conditions are met, the two adjacent channels are selected as power channels. If the distance comparison result shows that the location distance is large, the adjacent channel will also be selected as the power channel to ensure that the number of channels and coverage meet the communication requirements.

[0105] By considering the distance relationship between channels and comprehensively evaluating the stability of delay fluctuations, it is ensured that the selected power channel can provide high-quality and stable signal transmission. Even at long distances, the normal operation of the power channel can be ensured.

[0106] Please continue reading Figure 4 As shown, it is a decision logic diagram of the correction unit of this embodiment correcting the preset intensity threshold;

[0107] Specifically, the correction module includes:

[0108] A quantity fluctuation calculation unit, used to calculate the standard deviation of the quantity of all the power channels to form a quantity fluctuation value;

[0109] A correction unit is connected to the quantity fluctuation calculation unit and is used to correct the preset intensity threshold according to the quantity fluctuation value and the preset quantity fluctuation threshold when the quantity fluctuation value is greater than the preset quantity fluctuation threshold.

[0110] The preset quantity fluctuation threshold is a standard value used to determine whether the fluctuation of the number of power channels exceeds the normal range. It depends on the operating characteristics of the power network and the normal fluctuation range of the number of channels. It is usually set between 2 and 5 times the standard deviation of the number of power channels. In this embodiment, it is set to 5, which can effectively avoid unnecessary adjustments due to normal fluctuations. At the same time, it ensures that when the number of power channels changes significantly, the system can respond in time to ensure communication stability.

[0111] The standard deviation of the number of all power channels is calculated by the quantity fluctuation calculation unit to form a quantity fluctuation value. This fluctuation value is used to measure the fluctuation amplitude of the number of power channels within a certain period of time. When the quantity fluctuation value is greater than the preset quantity fluctuation threshold, the correction unit corrects the preset strength threshold according to the difference between the quantity fluctuation value and the preset quantity fluctuation threshold. This process ensures that the system responds to changes in the number of power channels, thereby adjusting the strength threshold to adapt to the current network conditions and ensuring communication stability and performance.

[0112] By calculating the number fluctuation and threshold correction, the correction module can dynamically adjust the strength threshold, thereby effectively avoiding signal instability or misjudgment caused by excessive fluctuations in the number of power channels. This function can improve the adaptability and stability of the power communication system, ensuring that the system can still work normally and maintain good communication quality when the number of channels changes.

[0113] Specifically, the correction unit includes:

[0114] A quantity fluctuation deviation calculation subunit, used to calculate the relative deviation between the quantity fluctuation value and the preset quantity fluctuation threshold value to form a quantity fluctuation deviation;

[0115] A correction subunit is connected to the quantity fluctuation deviation calculation subunit, and is used to reduce the preset intensity threshold according to the quantity fluctuation deviation and a preset correction coefficient when the quantity fluctuation deviation is greater than the preset correction deviation, and to increase the preset intensity threshold according to the quantity fluctuation deviation and a preset correction coefficient when the quantity fluctuation deviation is less than or equal to the preset correction deviation, wherein the preset intensity threshold is positively correlated with the quantity fluctuation deviation.

[0116] The preset correction deviation is a value used to measure the relative deviation between the quantity fluctuation and the preset quantity fluctuation threshold. It depends on the stability requirements of the power network and the sensitivity of the system to changes. It is usually set between 0.1 and 0.5. In this embodiment, it is set to 0.3, which can balance the response speed and stability of the system, ensure timely correction in the case of large fluctuations, and avoid excessive adjustment that may cause the system to be too sensitive.

[0117] The preset correction factor is a proportional factor used to adjust the intensity threshold, which depends on the load characteristics of the power system and the response requirements to changes in network load, and is usually set between 0.05 and 0.2. In this embodiment, it is set to 0.1, which can ensure that the threshold is adjusted appropriately when the quantity fluctuation deviation is large, which can reduce errors and ensure the stability of the network, and avoid new unstable factors caused by excessive correction.

[0118] The quantity fluctuation deviation calculation subunit calculates the relative deviation between the quantity fluctuation value and the preset quantity fluctuation threshold value to obtain the quantity fluctuation deviation. Then, the correction subunit performs correction according to the comparison result between the quantity fluctuation deviation and the preset correction deviation. When the quantity fluctuation deviation is greater than the preset correction deviation, the preset intensity threshold value is reduced by the preset correction coefficient; and when the quantity fluctuation deviation is less than or equal to the preset correction deviation, the preset intensity threshold value is increased by the preset correction coefficient.

[0119] By dynamically adjusting the preset strength threshold to adapt to the fluctuation of the actual network, the system's adaptability to environmental changes is improved, avoiding system imbalance caused by an overly fixed strength threshold.

[0120] Specifically, the first determining module includes:

[0121] A strength comparison unit, used to compare the real-time carrier signal strength with the preset strength threshold to form a strength comparison result;

[0122] A first determination unit is connected to the strength comparison unit, and is used to determine that the target channel is the first temporary channel when the strength comparison result is that the real-time carrier signal strength is greater than the preset strength threshold.

[0123] The strength comparison unit compares the real-time carrier signal strength with the preset strength threshold to form a strength comparison result. When the real-time signal strength is greater than the preset threshold, the first determination unit determines the target channel as the first temporary channel. The core of this process is to determine which channels have better signal quality based on the comparison between the real-time signal strength and the threshold, so as to preliminarily screen out effective channels.

[0124] By setting preset strength thresholds, the module can optimize channel selection in real time under dynamic environments, improve the stability and reliability of the communication system, and reduce the impact of poor signal channels on overall system performance.

[0125] Specifically, the second determination module includes:

[0126] A noise comparison unit, used to compare the real-time noise level with a preset noise threshold to form a noise comparison result;

[0127] A second determination unit is connected to the noise comparison unit, and is used to determine that the first temporary channel is the second temporary channel when the noise comparison result shows that the real-time noise level is less than the preset noise threshold.

[0128] The preset noise threshold is a limit value set by the system, which is used to measure the noise level of the channel. It depends on the noise tolerance of the system, the technical requirements of power line carrier communication and the noise characteristics of the network environment. It is usually set between -60dBm and -100dBm. In this embodiment, it is set to -75dBm, which can balance the system's anti-noise ability and communication efficiency. In the actual power line carrier communication environment, it can effectively filter out excessive noise interference without being too strict, resulting in too few available channels, thereby maintaining the stability of the system and the reliability of data transmission.

[0129] In the second determination module, the noise comparison unit first compares the real-time noise level with the preset noise threshold to form a noise comparison result. When the real-time noise level is less than the preset noise threshold, the second determination unit determines the first temporary channel as the second temporary channel. The purpose of this process is to ensure that the noise level of the selected channel is within an acceptable range through further screening, thereby providing a more stable communication environment for subsequent signal transmission.

[0130] By excluding channels with excessively high noise levels, communication quality is optimized and data transmission errors caused by noise interference are avoided. By combining noise thresholds for screening, the anti-interference capability of the communication system can be effectively improved, ensuring that the system can maintain stable performance in a complex power network environment.

[0131] 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.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-channel power line carrier communication system, characterized in that: include: A data acquisition module is used to collect the real-time carrier signal strength, real-time noise level and real-time channel delay value at the acquisition point on each target channel in the power network area; A first determination module, connected to the data acquisition module, for determining a plurality of first temporary channels according to the real-time carrier signal strength and a preset strength threshold; a second determination module, connected to the data acquisition module and the first determination module respectively, for determining a number of second temporary channels according to the real-time noise level of each of the first temporary channels; A determination module, which is connected to the data acquisition module and the second determination module respectively, and is used to determine a number of independent channels according to the real-time carrier signal strengths of any two adjacent second temporary channels within a preset determination time period; A selection module, which is connected to the determination module and the data acquisition module respectively, and is used to select a number of power channels according to the position distance between any two adjacent independent channels and the real-time channel delay value within a preset adjustment time; A sending module, connected to the selection module, for sending a transmission signal according to all the power channels; a correction module, connected to the first determination module and the selection module respectively, for correcting the preset intensity threshold according to the number of all the power channels within a preset correction time; The determination module comprises: A strength fluctuation calculation unit, used for calculating the standard deviation of the real-time carrier signal strength of each of the second temporary channels to form a strength fluctuation value; a deviation calculation unit connected to the intensity fluctuation calculation unit, for calculating a relative deviation of the intensity fluctuation values ​​of any two adjacent second temporary channels to form a change consistency; a determination unit connected to the deviation calculation unit and configured to determine a number of independent channels according to the change consistency; The determination unit comprises: A consistency comparison subunit, used to compare the change consistency with a preset consistency threshold to form a consistency comparison result; a determination subunit, connected to the consistency comparison subunit, for determining, when the change consistency is greater than the preset consistency threshold, that the second temporary channel is the independent channel, so as to form a plurality of independent channels; The selection module comprises: A measuring unit, used for measuring the distance between any two adjacent monitoring points on the independent channels to form a position distance; A delay fluctuation calculation unit, used to calculate the relative deviation of the standard deviation of the real-time channel delay values ​​of any two adjacent independent channels to form a delay fluctuation deviation; a selection unit, connected to the measuring unit and the delay fluctuation calculation unit, respectively, for selecting a plurality of power channels according to the position distance and the delay fluctuation deviation; The selection unit comprises: A distance comparison subunit, used to compare the position distance with a preset distance threshold to form a distance comparison result; A fluctuation deviation comparison subunit, used to compare the delay fluctuation deviation with a preset fluctuation deviation threshold to form a fluctuation deviation comparison result; a selection subunit, which is connected to the distance comparison subunit and the fluctuation deviation comparison subunit respectively, and is used to select the corresponding two adjacent independent channels as power channels when the distance comparison result is that the position distance is less than the preset distance threshold, and the fluctuation deviation comparison result is that the delay fluctuation deviation is less than the preset fluctuation deviation threshold; The correction module comprises: A quantity fluctuation calculation unit, used to calculate the standard deviation of the quantity of all the power channels to form a quantity fluctuation value; a correction unit connected to the quantity fluctuation calculation unit, for correcting the preset intensity threshold according to the quantity fluctuation value and the preset quantity fluctuation threshold when the quantity fluctuation value is greater than the preset quantity fluctuation threshold; The correction unit comprises: A quantity fluctuation deviation calculation subunit, used to calculate the relative deviation between the quantity fluctuation value and the preset quantity fluctuation threshold value to form a quantity fluctuation deviation; A correction subunit is connected to the quantity fluctuation deviation calculation subunit, and is used to reduce the preset intensity threshold according to the quantity fluctuation deviation and the preset correction coefficient when the quantity fluctuation deviation is greater than the preset correction deviation, and to increase the preset intensity threshold according to the quantity fluctuation deviation and the preset correction coefficient when the quantity fluctuation deviation is less than or equal to the preset correction deviation.

2. The multi-channel power line carrier communication system according to claim 1, characterized in that: The selection subunit is further configured to select the corresponding two adjacent independent channels as power channels when the distance comparison result indicates that the position distance is greater than or equal to the preset distance threshold.

3. The multi-channel power line carrier communication system according to claim 2, characterized in that: The first determining module comprises: A strength comparison unit, used to compare the real-time carrier signal strength with the preset strength threshold to form a strength comparison result; A first determination unit is connected to the strength comparison unit, and is used to determine that the target channel is the first temporary channel when the strength comparison result is that the real-time carrier signal strength is greater than the preset strength threshold.

4. The multi-channel power line carrier communication system according to claim 3, characterized in that: The second determining module comprises: A noise comparison unit, used to compare the real-time noise level with a preset noise threshold to form a noise comparison result; A second determination unit is connected to the noise comparison unit, and is used to determine that the first temporary channel is the second temporary channel when the noise comparison result shows that the real-time noise level is less than the preset noise threshold.

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