Method and system for optimizing medium-voltage carrier communication in high-permeability power grid

Abstract

The invention relates to the technical field of communication optimization, and particularly discloses a medium-voltage carrier communication optimization method and system in a high-permeability power grid, and the method comprises the steps: constructing a medium-voltage carrier communication channel transmission model in the high-permeability power grid, and obtaining a medium-voltage carrier communication channel fading factor, analyzing medium-voltage carrier communication channel interference characteristics and communication channel characteristics in the high-permeability power grid, determining medium-voltage carrier communication channel quality, obtaining medium-voltage carrier communication transmission requirements, determining a relay node optimization deployment scheme, selecting a medium-voltage carrier communication channel optimization frequency interval in the high-permeability power grid, and optimizing the medium-voltage carrier communication channel optimization frequency interval in the high-permeability power grid. And judging whether the forwarding efficiency of the relay node is qualified or not. The method solves the problems that a traditional medium-voltage carrier communication method is insufficient in transmission reliability, insufficient in network topology adaptive capacity, poor in anti-interference capacity and slow in dynamic topology change response. The method can better adapt to a complex environment, and ensures that a communication system can stably operate under various working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of communication optimization, and in particular to a method and system for optimizing medium voltage carrier communication in a high-penetration power grid. Background Art

[0002] With the continuous development of modern power grids, high-penetration power grids have become a trend. A large number of distributed energy resources (solar energy, wind energy, etc.) are connected to high-penetration power grids, and the access of these distributed energy sources makes the topological structure of the power grid more complex. At the same time, the construction of smart grids is also advancing. The large-scale application of equipment such as smart meters and distribution automation terminals has made the power grid's demand for and dependence on communications increasingly high. As a communication method that can use existing power lines for data transmission, medium-voltage carrier communication has potential application value in the communication system of smart grids. Medium-voltage carrier communication has the advantage of not requiring additional communication lines to be laid. However, in a high-penetration power grid environment, due to the increase in signal interference sources on the power lines in the high-penetration power grid, and the complex topological structure of the power grid will cause problems such as signal attenuation and reflection, the path loss of signal transmission will increase, and the reliability of transmission will decrease.

[0003] Nowadays, there are still some deficiencies in the research on medium-voltage carrier communication optimization in high-penetration power grids. Specifically, the traditional medium-voltage carrier communication method has insufficient transmission reliability when facing the complex electromagnetic environment and network structure of high-penetration power grids. In addition, the traditional network topology has insufficient adaptability, poor anti-interference ability, and slow response to dynamic topology changes, which affects the reliability of communication. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method and system for optimizing medium-voltage carrier communications in a high-penetration power grid, which can effectively solve the problems involved in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a method for optimizing medium-voltage carrier communication in a high-penetration power grid, comprising the following steps: constructing a medium-voltage carrier communication channel transmission model in a high-penetration power grid, analyzing and obtaining a channel multipath fading factor and a channel shadow fading factor, and obtaining a medium-voltage carrier communication channel fading factor based on the channel multipath fading factor and the channel shadow fading factor; analyzing the interference characteristics of the medium-voltage carrier communication channel in the high-penetration power grid to obtain a medium-voltage carrier communication channel interference signal;

[0006] The characteristics of the medium-voltage carrier communication channel in the high-penetration power grid are analyzed, and the quality of the medium-voltage carrier communication channel is determined by combining the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel. The medium-voltage carrier communication transmission demand is obtained, and combined with the quality of the medium-voltage carrier communication channel, the optimal deployment plan of the relay nodes is determined and the optimal frequency range of the medium-voltage carrier communication channel in the high-penetration power grid is selected. A forwarding delay model of the relay nodes that have been optimally deployed is constructed to determine whether the forwarding efficiency of the relay nodes is qualified, and determine the optimization plan for the forwarding efficiency of unqualified relay nodes.

[0007] As a further method, a medium-voltage carrier communication channel transmission model in a high-penetration power grid is constructed, and the channel multipath fading factor and channel shadow fading factor are obtained by analysis. The specific analysis process is as follows: Construct a medium-voltage carrier communication channel transmission model in a high-penetration power grid:

[0008]

[0009] In the formula, H decline is the channel multipath fading factor, a k is the attenuation coefficient of the kth channel transmission path, π is pi, f is the carrier frequency, t k is the transmission delay of the k-th channel transmission path, j is an imaginary unit, e is a natural constant, k is the number of each channel transmission path, k = 1, 2, 3, ..., N, N is the total number of channel transmission paths;

[0010] Calculate the channel shadow fading factor:

[0011]

[0012] In the formula, H decline,y is the channel shadow fading factor, σ sh is the shadow fading standard deviation stored in the database, n sh is a random number that follows a standard normal distribution.

[0013] As a further method, based on the channel multipath fading factor and the channel shadow fading factor, the medium voltage carrier communication channel fading factor is obtained. The specific analysis process is: the medium voltage carrier communication channel fading factor, the specific calculation formula is:

[0014]

[0015] In the formula, S decline is the fading factor of the medium voltage carrier communication channel.

[0016] As a further method, the interference characteristics of the medium-voltage carrier communication channel in the high-penetration power grid are analyzed to obtain the interference signal of the medium-voltage carrier communication channel. The specific analysis process is: obtaining the interference characteristic data of the medium-voltage carrier communication channel in the high-penetration power grid, the interference characteristic data of the medium-voltage carrier communication channel in the high-penetration power grid specifically includes the peak power of electromagnetic pulses, the average frequency of harmonics, and the number of sunspots; based on the obtained interference characteristic data of the medium-voltage carrier communication channel in the high-penetration power grid, a comprehensive analysis is performed to obtain the interference signal of the medium-voltage carrier communication channel, and the interference signal of the medium-voltage carrier communication channel is used as the analysis basis for determining the quality of the medium-voltage carrier communication channel.

[0017] As a further method, the medium voltage carrier communication channel interference signal, the specific analysis process is:

[0018]

[0019] In the formula, Chan inter is the interference signal of the medium voltage carrier communication channel, Peak Power is the peak power of electromagnetic pulse, Harm aver is the harmonic mean frequency, sunspot is the number of sunspots, μ 1 Peak Power The compensation factor, μ 2 Harm aver The compensation factor, μ 3 is the compensation factor of the set sunspot, and e is a natural constant.

[0020] As a further method, the characteristics of the medium-voltage carrier communication channel in the high-penetration power grid are analyzed, and the quality of the medium-voltage carrier communication channel is determined by combining the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel. The specific analysis process is as follows: Calculate the signal-to-noise ratio of the medium-voltage carrier communication channel in the high-penetration power grid:

[0021]

[0022] Where SNR is the signal-to-noise ratio of the medium voltage carrier communication channel in the high penetration power grid, γ is the dynamic adjustment factor of the signal power stored in the database, and H decline is the channel multipath fading factor, N 0 is the noise power spectral density;

[0023] Calculate the bit error rate of medium voltage carrier communication channel in high penetration power grid:

[0024]

[0025] Where BER is the bit error rate of the medium voltage carrier communication channel in the high penetration power grid, Bit error is the number of bit errors transmitted, Bit nis the total number of codes transmitted;

[0026] Based on the signal-to-noise ratio of the medium-voltage carrier communication channel in the high-penetration power grid, the bit error rate of the medium-voltage carrier communication channel in the high-penetration power grid, the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel, the characteristics of the medium-voltage carrier communication channel are obtained through comprehensive analysis. The characteristics of the medium-voltage carrier communication channel are used as the analysis basis for determining the quality of the medium-voltage carrier communication channel.

[0027] Medium voltage carrier communication channel characteristics, the specific calculation formula is:

[0028]

[0029] In the formula, Zbi xd is the medium voltage carrier communication channel characteristic, S decline is the fading factor of the medium voltage carrier communication channel, Chan inter is the interference signal of the medium voltage carrier communication channel, λ 1 is the compensation factor of the set SNR, λ 2 is the compensation factor for the set BER, λ 3 For the setting S decline The compensation factor, λ 4 Chan inter The compensation factor of

[0030] A medium voltage carrier communication channel feature-medium voltage carrier communication channel quality mapping table pre-stored in a database is obtained, and a matching medium voltage carrier communication channel quality is found according to the medium voltage carrier communication channel feature by searching the mapping table.

[0031] As a further method, the medium voltage carrier communication transmission demand is obtained. The specific analysis process is as follows: Get the medium voltage carrier communication transmission distance Zbc jl ; Get the target transmission rate Zbc of the medium voltage carrier communication channel sl ; The medium voltage carrier communication transmission distance and the medium voltage carrier communication channel target transmission rate are recorded as the medium voltage carrier communication transmission requirements.

[0032] As a further method, combined with the quality of the medium-voltage carrier communication channel, the relay node optimization deployment plan is determined and the optimized frequency range of the medium-voltage carrier communication channel in the high-penetration power grid is selected. The specific analysis process is: the medium-voltage carrier communication transmission distance, the target transmission rate of the medium-voltage carrier communication channel and the quality of the medium-voltage carrier communication channel are stored as specified tags, and the specified tag-relay node optimization deployment plan mapping table pre-stored in the database is obtained. By searching the mapping table, a matching relay node optimization deployment plan is found according to the specified tag;

[0033] Calculate the frequency interval selection index of medium voltage carrier communication channel in high penetration power grid:

[0034]

[0035] In the formula, F sel (f min , f max ) is the interval [f min , f max ] in the medium voltage carrier communication channel frequency interval selection index in the high penetration power grid, For the interval [f min , f max ], B avail (f min , f max ) is the interval [f min , f max ] of available channel bandwidth, For setting The weight factor of B avail (f min , f max )’s weight factor;

[0036] The frequency interval corresponding to the maximum value of each frequency interval selection index of the medium voltage carrier communication channel in the high penetration power grid is the optimized frequency interval of the medium voltage carrier communication channel in the high penetration power grid, f min For the interval [f min , f max ] frequency minimum value, f max For the interval [f min , f max ] is the maximum frequency value.

[0037] As a further method, a relay node forwarding delay model with optimized deployment is constructed to determine whether the relay node forwarding efficiency is qualified, and determine the optimization scheme for the forwarding efficiency of unqualified relay nodes. The specific analysis process is as follows: Constructing a relay node forwarding delay model with optimized deployment:

[0038]

[0039] Where, T relay is the total forwarding delay of the relay node, T proc is the processing delay of the relay node, ΔT proc is the allowed processing delay of the relay node stored in the database, T trans is the transmission delay of the relay node, ΔT trans is the allowed transmission delay of the relay node stored in the database, T queue is the queuing delay of the relay node, ΔT queue is the allowed queuing delay of the relay node stored in the database, φ 1 For setting The compensation factor, φ 2 For setting The compensation factor, φ 3 For setting The compensation factor of

[0040] The total forwarding delay of the relay node is compared with the total forwarding bounded delay of the relay node stored in the database; if the total forwarding delay of the relay node is lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is qualified; if the total forwarding delay of the relay node is not lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is unqualified, and an optimization scheme mapping table of the total forwarding delay of the relay node-relay node forwarding efficiency pre-stored in the database is obtained, and by looking up the mapping table, a matching optimization scheme for the relay node forwarding efficiency is found according to the total forwarding delay of the relay node.

[0041] The second aspect of the present invention provides a medium-voltage carrier communication optimization system in a high-penetration power grid, including a channel fading factor analysis module, a channel interference signal analysis module, a communication channel quality determination module, a relay node optimization deployment module and a forwarding efficiency optimization scheme determination module, wherein: the channel fading factor analysis module is used to construct a medium-voltage carrier communication channel transmission model in a high-penetration power grid, analyze and obtain a channel multipath fading factor and a channel shadow fading factor, and obtain a medium-voltage carrier communication channel fading factor based on the channel multipath fading factor and the channel shadow fading factor; the channel interference signal analysis module is used to analyze the interference characteristics of the medium-voltage carrier communication channel in the high-penetration power grid to obtain a medium-voltage carrier communication channel interference signal;

[0042] The communication channel quality determination module is used to analyze the characteristics of the medium-voltage carrier communication channel in the high-penetration power grid, and determine the quality of the medium-voltage carrier communication channel in combination with the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel; the relay node optimization deployment module is used to obtain the medium-voltage carrier communication transmission demand, and determine the relay node optimization deployment plan and select the optimized frequency range of the medium-voltage carrier communication channel in the high-penetration power grid in combination with the medium-voltage carrier communication channel quality; the forwarding efficiency optimization plan determination module is used to construct a forwarding delay model for the relay node that has completed the optimized deployment, determine whether the forwarding efficiency of the relay node is qualified, and determine the optimization plan for the forwarding efficiency of unqualified relay nodes.

[0043] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0044] (1) The present invention provides a method and system for optimizing medium-voltage carrier communications in a high-penetration power grid. By constructing a transmission model to analyze the fading factor, the attenuation characteristics of the channel can be accurately grasped. The quality of the medium-voltage carrier communication channel can be evaluated more accurately, and factors that lead to communication interruptions or errors can be discovered in advance. The channel interference characteristics are analyzed so that targeted anti-interference measures can be taken during the communication process. Obtaining transmission requirements and determining the optimal deployment plan for relay nodes in combination with channel quality can maximize the role of relay nodes in high-penetration power grids.

[0045] (2) The present invention can use the frequency with better channel quality for communication by selecting the appropriate medium-voltage carrier communication channel optimization frequency interval. By building a relay node forwarding delay model and judging whether the forwarding efficiency is qualified, the forwarding efficiency of the relay node can be improved. This comprehensive optimization method can better adapt to this complex environment and ensure that the communication system can operate stably under various working conditions.

[0046] (3) The present invention determines the quality of the medium-voltage carrier communication channel by analyzing the characteristics of the medium-voltage carrier communication channel in the high-penetration power grid, combining the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel, which helps to estimate the risks of communication in advance. If the channel quality is poor, then it can be foreseen that a high bit error rate and signal interruption will occur during the communication process, thus avoiding the serious impact of communication failures on the operation of the power grid. After clarifying the channel quality, targeted anti-interference strategies can be formulated according to the characteristics of the interference signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0048] Figure 1 The figure is a schematic flow chart of the method steps of the present invention.

[0049] Figure 2 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] Reference Figure 1As shown, the first aspect of the present invention provides a method for optimizing medium-voltage carrier communication in a high-penetration power grid, including: constructing a medium-voltage carrier communication channel transmission model in a high-penetration power grid, analyzing and obtaining a channel multipath fading factor and a channel shadow fading factor, and obtaining a medium-voltage carrier communication channel fading factor based on the channel multipath fading factor and the channel shadow fading factor.

[0052] The specific analysis process is as follows: Construct a medium voltage carrier communication channel transmission model in a high penetration power grid:

[0053]

[0054] In the formula, H decline is the channel multipath fading factor, a k is the attenuation coefficient of the kth channel transmission path, π is pi, f is the carrier frequency, t k is the transmission delay of the k-th channel transmission path, j is an imaginary unit, e is a natural constant, k is the number of each channel transmission path, k = 1, 2, 3, ..., N, N is the total number of channel transmission paths;

[0055] Calculate the channel shadow fading factor:

[0056]

[0057] In the formula, H decline,y is the channel shadow fading factor, σ sh is the shadow fading standard deviation stored in the database, n sh is a random number that follows a standard normal distribution.

[0058] Based on the channel multipath fading factor and the channel shadow fading factor, the medium voltage carrier communication channel fading factor is obtained. The specific analysis process is: the medium voltage carrier communication channel fading factor, the specific calculation formula is:

[0059]

[0060] In the formula, S decline is the fading factor of the medium voltage carrier communication channel.

[0061] By constructing a medium-voltage carrier communication channel transmission model in a high-penetration power grid, the transmission characteristics of the channel can be accurately described. Involving parameters such as the channel multipath fading factor, the attenuation coefficient of each channel transmission path, the carrier frequency, and the transmission delay, we can deeply understand the behavior of the channel under different conditions, including the attenuation and phase change of the signal when it is transmitted on multiple paths. Not only can the channel multipath fading factor be obtained, but the channel shadow fading factor and the final medium-voltage carrier communication channel fading factor can also be further calculated. This facilitates accurate analysis and evaluation of channel conditions in different scenarios.

[0062] The fading factor of the medium voltage carrier communication channel is used as an analytical basis for determining the channel quality. It can fully reflect the fading of the channel, including the combined effects of multipath fading and shadow fading. It can more accurately evaluate the quality of the channel in a high-penetration power grid environment, such as judging whether the channel is suitable for high-speed data transmission or whether additional measures are needed to improve the channel quality. This is crucial to ensure reliable communication between various devices in the power grid.

[0063] In a high-penetration power grid, the large-scale access of distributed energy and the complexity of the power grid topology make the medium-voltage carrier communication channel affected by various factors, such as harmonic interference, signal reflection and attenuation. The above method fully considers these complex factors by constructing a comprehensive transmission model and calculating the fading factor, and can more realistically reflect the channel characteristics in a high-penetration power grid environment. This enables the design and optimization of the communication system to better adapt to this complex environment, ensure good communication performance under various working conditions, and provide strong communication support for the stable operation of the high-penetration power grid.

[0064] The interference characteristics of medium-voltage carrier communication channels in high-penetration power grids are analyzed, and the interference signals of medium-voltage carrier communication channels are obtained.

[0065] The specific analysis process is: obtaining interference characteristic data of medium-voltage carrier communication channels in high-penetration power grids, which specifically include electromagnetic pulse peak power, harmonic average frequency, and sunspot number; based on the obtained interference characteristic data of medium-voltage carrier communication channels in high-penetration power grids, a comprehensive analysis is performed to obtain the interference signal of the medium-voltage carrier communication channel, which is used as the analysis basis for determining the quality of the medium-voltage carrier communication channel.

[0066] Medium voltage carrier communication channel interference signal, the specific analysis process is as follows:

[0067]

[0068] In the formula, Chan inter is the interference signal of the medium voltage carrier communication channel, Peak Power is the peak power of electromagnetic pulse, Harm aver is the harmonic mean frequency, sunspot is the number of sunspots, μ 1 Peak Power The compensation factor, μ 2 Harm aver The compensation factor, μ 3 is the compensation factor of the set sunspot, and e is a natural constant.

[0069] By acquiring interference characteristic data of medium-voltage carrier communication channels in high-penetration power grids, including electromagnetic pulse peak power, harmonic average frequency, sunspot number, etc., it is possible to comprehensively cover various interference sources that affect communication channels. In a high-penetration power grid environment, electromagnetic pulses come from the switching operation of power electronic equipment, harmonics are generated by distributed energy access, and changes in the number of sunspots will affect the ionosphere, which in turn affects communications. Combining these factors, the impact of interference on the channel can be evaluated more comprehensively and accurately, avoiding the problem of incomplete evaluation caused by considering only a single interference factor.

[0070] Various interference factors are quantified through mathematical models. In this way, a numerical value representing the degree of interference can be intuitively obtained, which is convenient for comparison and analysis of interference conditions in different scenarios. The interference signal of the medium-voltage carrier communication channel is one of the important analysis bases for determining the channel quality. Together with the factors such as the channel fading factor mentioned above, it can more accurately determine the channel quality. The channel quality depends not only on the attenuation of the signal, but also on the presence of interference, which can seriously affect the reliability of communication and the accuracy of data transmission. By incorporating the interference signal into the channel quality evaluation system, we can have a more comprehensive understanding of the actual situation of the channel, so as to more accurately judge whether the channel meets the communication requirements, such as whether it can support high-speed, low-bit error rate data transmission. After clarifying the specific value and composition of the interference signal, we can formulate targeted anti-interference strategies.

[0071] In a high-penetration power grid, various interference factors are intertwined and the environment is complex and changeable. Through detailed analysis and quantification of channel interference characteristics, we can better adapt to this complex environment. We can timely discover the changing trend and main interference sources of interference, take measures in advance to prevent and respond, and ensure that medium-voltage carrier communication can operate stably in a complex power grid environment. This is crucial to ensure reliable communication between smart meters, distributed energy management systems and other equipment in the power grid, thereby ensuring the normal realization of functions such as automatic monitoring, control and energy management of the power grid, and improving the overall operation efficiency and safety of the power grid.

[0072] The characteristics of medium-voltage carrier communication channel in high-penetration power grid are analyzed, and the quality of medium-voltage carrier communication channel is determined by combining the interference signal of medium-voltage carrier communication channel and the fading factor of medium-voltage carrier communication channel.

[0073] The specific analysis process is as follows: Calculate the signal-to-noise ratio of the medium-voltage carrier communication channel in the high-penetration power grid:

[0074]

[0075] Where SNR is the signal-to-noise ratio of the medium voltage carrier communication channel in the high penetration power grid, γ is the dynamic adjustment factor of the signal power stored in the database, and H decline is the channel multipath fading factor, N0 is the noise power spectral density;

[0076] Calculate the bit error rate of medium voltage carrier communication channel in high penetration power grid:

[0077]

[0078] Where BER is the bit error rate of the medium voltage carrier communication channel in the high penetration power grid, Bit error is the number of bit errors transmitted, Bit n is the total number of codes transmitted;

[0079] Based on the signal-to-noise ratio of the medium-voltage carrier communication channel in the high-penetration power grid, the bit error rate of the medium-voltage carrier communication channel in the high-penetration power grid, the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel, the characteristics of the medium-voltage carrier communication channel are obtained through comprehensive analysis. The characteristics of the medium-voltage carrier communication channel are used as the analysis basis for determining the quality of the medium-voltage carrier communication channel.

[0080] Medium voltage carrier communication channel characteristics, the specific calculation formula is:

[0081]

[0082] In the formula, Zbi xd is the medium voltage carrier communication channel characteristic, S decline is the fading factor of the medium voltage carrier communication channel, Chan inter is the interference signal of the medium voltage carrier communication channel, λ 1 is the compensation factor of the set SNR, λ 2 is the compensation factor for the set BER, λ 3 For the setting S decline The compensation factor, λ 4 Chan inter The compensation factor of

[0083] A medium voltage carrier communication channel feature-medium voltage carrier communication channel quality mapping table pre-stored in a database is obtained, and a matching medium voltage carrier communication channel quality is found according to the medium voltage carrier communication channel feature by searching the mapping table.

[0084] By calculating the signal-to-noise ratio and bit error rate of the medium-voltage carrier communication channel in the high-penetration power grid, and combining the channel fading factor and channel interference signal, a comprehensive analysis is conducted to obtain the characteristics of the medium-voltage carrier communication channel. This comprehensive consideration of multiple factors can comprehensively and accurately reflect the actual quality of the channel. The signal-to-noise ratio reflects the relative strength of the signal and noise, the bit error rate reflects the accuracy of data transmission, the fading factor characterizes the attenuation of the signal during transmission, and the interference signal represents the impact of external interference on the channel. Combining these factors avoids the one-sidedness of single indicator evaluation and can more accurately grasp the channel quality.

[0085] In a high-penetration power grid, the massive access of distributed energy, the complex power grid topology, and the changing electromagnetic environment pose many challenges to the medium-voltage carrier communication channel. The above method can better adapt to this complex environment by comprehensively analyzing multiple channel characteristic parameters. The fading factor takes into account the attenuation of the signal in a complex power grid line, and the interference signal covers the influence of various interference sources such as electromagnetic pulses and harmonics, which are closely related to the actual situation of the high-penetration power grid. Through this comprehensive analysis, we can more accurately understand the performance of the channel in a high-penetration power grid environment.

[0086] By obtaining the medium voltage carrier communication channel characteristics-medium voltage carrier communication channel quality mapping table pre-stored in the database, the matching channel quality can be quickly found according to the calculated channel characteristics. This method can greatly improve the efficiency of channel quality assessment, quickly provide reference for the operation and maintenance of the communication system, and timely adjust system parameters or take corresponding measures to ensure that the communication system is always in a good operating state. At the same time, the use of the mapping table also facilitates batch evaluation and management of a large number of channels, improving work efficiency and management level.

[0087] Obtain the medium-voltage carrier communication transmission requirements, combine the medium-voltage carrier communication channel quality, determine the optimal deployment plan for relay nodes, and select the optimized frequency range of the medium-voltage carrier communication channel in the high-penetration power grid.

[0088] Specifically, the medium voltage carrier communication transmission requirements are obtained. The specific analysis process is as follows: Get the medium voltage carrier communication transmission distance Zbc jl ; Get the target transmission rate Zbc of the medium voltage carrier communication channel sl The medium voltage carrier communication transmission demand data specifically includes the medium voltage carrier communication transmission distance and the medium voltage carrier communication channel target transmission rate.

[0089] The medium voltage carrier communication transmission distance, the medium voltage carrier communication channel target transmission rate and the medium voltage carrier communication channel quality are stored as specified tags, and a mapping table of specified tags and relay node optimization deployment solutions pre-stored in the database is obtained. By searching the mapping table, a matching relay node optimization deployment solution is found according to the specified tags;

[0090] Calculate the frequency interval selection index of medium voltage carrier communication channel in high penetration power grid:

[0091]

[0092] In the formula, F sel (f min , f max ) is the interval [f min , f max ] in the medium voltage carrier communication channel frequency interval selection index in the high penetration power grid, For the interval [f min , f max ], B avail (f min , f max ) is the interval [f min , f max ] of available channel bandwidth, For setting The weight factor of B avail (f min , f max )’s weight factor;

[0093] The frequency interval corresponding to the maximum value of each frequency interval selection index of the medium voltage carrier communication channel in the high penetration power grid is the optimized frequency interval of the medium voltage carrier communication channel in the high penetration power grid, f min For the interval [f min , f max ] frequency minimum value, f max For the interval [f min , f max ] is the maximum frequency value.

[0094] By obtaining specific transmission demand data such as medium-voltage carrier communication transmission distance and target transmission rate, and combining it with the medium-voltage carrier communication channel quality obtained by previous evaluation, the relay node optimization deployment plan can be determined more accurately. For example, when the transmission distance is long and the channel quality is poor, a mapping table can be used to find a solution suitable for increasing the number of relay nodes or adjusting the location of relay nodes to ensure that the signal can be effectively transmitted and meet the target transmission rate requirements. This method of determining a deployment plan based on actual transmission requirements and channel quality can improve the pertinence and effectiveness of the communication system and avoid waste of resources and unreasonable deployment.

[0095] The frequency interval selection index of medium-voltage carrier communication channel in high-penetration power grid is calculated, which takes into account the average signal-to-noise ratio and available channel bandwidth of the interval, and by setting the weight factor, the optimized frequency interval of medium-voltage carrier communication channel can be scientifically selected. This method comprehensively considers signal quality (signal-to-noise ratio) and bandwidth resources, avoiding the problem of poor communication performance caused by selecting frequency based on only a single factor.

[0096] Selecting the optimal frequency interval can improve spectrum utilization efficiency. In a high-penetration power grid, spectrum resources are limited. Through this scientific frequency interval selection method, a frequency interval with a high signal-to-noise ratio and a large available bandwidth can be found, enabling the communication system to achieve a higher data transmission rate and better communication quality under limited spectrum resources. This is of great significance for improving the overall performance and capacity of the power grid communication system, and also helps to reduce frequency interference between different communication systems and ensure smooth power grid communication.

[0097] Starting from the transmission requirements, the relay node deployment and frequency range selection are comprehensively considered to achieve the overall optimization of the medium voltage carrier communication system. Through this comprehensive optimization, the potential of the communication system can be fully utilized and the overall efficiency and performance of the system can be improved.

[0098] A relay node forwarding delay model for optimized deployment is constructed to determine whether the relay node forwarding efficiency is qualified, and to determine an optimization plan for the forwarding efficiency of unqualified relay nodes.

[0099] The specific analysis process is as follows: Construct a relay node forwarding delay model that completes the optimized deployment:

[0100]

[0101] Where, T relay is the total forwarding delay of the relay node, T proc is the processing delay of the relay node, ΔT proc is the allowed processing delay of the relay node stored in the database, T trans is the transmission delay of the relay node, ΔT trans is the allowed transmission delay of the relay node stored in the database, T queue is the queuing delay of the relay node, ΔT queue is the allowed queuing delay of the relay node stored in the database, φ 1 For setting The compensation factor, φ 2 For setting The compensation factor, φ 3 For setting compensation factor.

[0102] The total forwarding delay of the relay node is compared with the total forwarding bounded delay of the relay node stored in the database; if the total forwarding delay of the relay node is lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is qualified; if the total forwarding delay of the relay node is not lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is unqualified, and an optimization scheme mapping table of the total forwarding delay of the relay node-relay node forwarding efficiency pre-stored in the database is obtained, and by looking up the mapping table, a matching optimization scheme for the relay node forwarding efficiency is found according to the total forwarding delay of the relay node.

[0103] By constructing a relay node forwarding delay model, it is clarified that the total forwarding delay of the relay node is composed of factors such as processing delay, transmission delay and queuing delay, and by comparing it with the allowed processing delay, allowed transmission delay and allowed queuing delay stored in the database, the forwarding delay of the relay node can be accurately quantified. This quantification method provides a specific numerical basis for the evaluation of forwarding efficiency, which is no longer a vague concept, and facilitates accurate judgment of the performance of the relay node.

[0104] The total forwarding delay of the relay node is compared with the total forwarding limit delay stored in the database to clearly determine whether the forwarding efficiency of the relay node is qualified. This clear standard can help operation and maintenance personnel quickly and accurately identify problematic relay nodes, promptly discover bottlenecks and potential failure points in the communication system, and provide a clear direction and basis for subsequent optimization and maintenance.

[0105] When it is determined that the forwarding efficiency of the relay node is unqualified, the matching optimization solution can be quickly found by searching the optimization solution mapping table of the total forwarding delay of the relay node-the forwarding efficiency of the relay node pre-stored in the database. This mapping table-based approach greatly improves the efficiency of the optimization process and reduces the time and cost of manual analysis and experiments. Operation and maintenance personnel can quickly take targeted measures based on the information in the mapping table, such as adjusting the hardware configuration of the relay node, optimizing the software algorithm, and improving the network topology, to improve the forwarding efficiency of the relay node.

[0106] Relay nodes play an important role in signal forwarding and relaying in communication systems, and their forwarding efficiency directly affects the performance and reliability of the entire communication system. By accurately evaluating and efficiently optimizing the forwarding efficiency of relay nodes, it is possible to ensure that signals can pass through relay nodes quickly and accurately during transmission, reducing the risk of delays and data loss.

[0107] Reference Figure 2As shown, the second aspect of the present invention provides a medium-voltage carrier communication optimization system in a high-penetration power grid, including a channel fading factor analysis module, a channel interference signal analysis module, a communication channel quality determination module, a relay node optimization deployment module and a forwarding efficiency optimization scheme determination module.

[0108] The channel fading factor analysis module is used to construct a medium-voltage carrier communication channel transmission model in a high-penetration power grid, analyze and obtain the channel multipath fading factor and the channel shadow fading factor, and obtain the medium-voltage carrier communication channel fading factor based on the channel multipath fading factor and the channel shadow fading factor.

[0109] The channel interference signal analysis module is used to analyze the interference characteristics of the medium-voltage carrier communication channel in the high-penetration power grid to obtain the medium-voltage carrier communication channel interference signal.

[0110] The communication channel quality determination module is used to analyze the characteristics of the medium-voltage carrier communication channel in the high-penetration power grid, and determine the quality of the medium-voltage carrier communication channel by combining the medium-voltage carrier communication channel interference signal and the medium-voltage carrier communication channel fading factor.

[0111] The relay node optimization deployment module is used to obtain the medium-voltage carrier communication transmission requirements, determine the relay node optimization deployment plan based on the medium-voltage carrier communication channel quality, and select the optimized frequency range of the medium-voltage carrier communication channel in the high-penetration power grid.

[0112] The forwarding efficiency optimization scheme determination module is used to construct a forwarding delay model of the relay node that has completed the optimized deployment, determine whether the forwarding efficiency of the relay node is qualified, and determine the optimization scheme for the forwarding efficiency of unqualified relay nodes.

[0113] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for optimizing medium voltage carrier communication in a high penetration power grid, characterized in that: The following steps are involved: A medium-voltage carrier communication channel transmission model in a high-penetration power grid is constructed, and the channel multipath fading factor and channel shadow fading factor are analyzed and obtained. Based on the channel multipath fading factor and channel shadow fading factor, the medium-voltage carrier communication channel fading factor is obtained. The interference characteristics of medium voltage carrier communication channel in high penetration power grid are analyzed to obtain the interference signal of medium voltage carrier communication channel; Analyze the characteristics of medium-voltage carrier communication channels in high-penetration power grids, and determine the quality of medium-voltage carrier communication channels by combining the interference signal and fading factor of medium-voltage carrier communication channels. Obtain medium-voltage carrier communication transmission requirements, determine the optimal deployment plan for relay nodes based on the quality of medium-voltage carrier communication channels, and select the optimal frequency range for medium-voltage carrier communication channels in high-penetration power grids; A relay node forwarding delay model for optimized deployment is constructed to determine whether the relay node forwarding efficiency is qualified, and to determine an optimization plan for the forwarding efficiency of unqualified relay nodes.

2. A method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 1, characterized in that: The medium voltage carrier communication channel transmission model in the high penetration power grid is constructed, and the channel multipath fading factor and the channel shadow fading factor are obtained by analysis. The specific analysis process is as follows: Constructing a medium voltage carrier communication channel transmission model in a high penetration power grid: In the formula, H decline is the channel multipath fading factor, a k is the attenuation coefficient of the kth channel transmission path, π is pi, f is the carrier frequency, t k is the transmission delay of the k-th channel transmission path, j is an imaginary unit, e is a natural constant, k is the number of each channel transmission path, k = 1, 2, 3, ..., N, N is the total number of channel transmission paths; Calculate the channel shadow fading factor: In the formula, H decline,y is the channel shadow fading factor, σ sh is the shadow fading standard deviation stored in the database, n sh is a random number that follows a standard normal distribution.

3. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 2, characterized in that: Based on the channel multipath fading factor and the channel shadow fading factor, the medium voltage carrier communication channel fading factor is obtained. The specific analysis process is: the medium voltage carrier communication channel fading factor, the specific calculation formula is: In the formula, S decline is the fading factor of the medium voltage carrier communication channel.

4. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 1, characterized in that: The interference characteristics of the medium voltage carrier communication channel in the high penetration power grid are analyzed to obtain the interference signal of the medium voltage carrier communication channel. The specific analysis process is as follows: Obtain interference characteristic data of medium-voltage carrier communication channels in high-penetration power grids, wherein the interference characteristic data of medium-voltage carrier communication channels in high-penetration power grids specifically include electromagnetic pulse peak power, harmonic average frequency, and sunspot number; Based on the acquired interference characteristic data of the medium-voltage carrier communication channel in the high-penetration power grid, a comprehensive analysis is performed to obtain the medium-voltage carrier communication channel interference signal, which is used as the analysis basis for determining the quality of the medium-voltage carrier communication channel.

5. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 4, characterized in that: The specific analysis process of the medium voltage carrier communication channel interference signal is as follows: In the formula, Chan inter is the interference signal of the medium voltage carrier communication channel, Peak Power is the peak power of electromagnetic pulse, Harm aver is the harmonic average frequency, sunspot is the number of sunspots, and μ1 is the set Peak Power The compensation factor, μ2 is the set Harm aver , μ3 is the compensation factor of the set sunspot, and e is a natural constant.

6. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 1, characterized in that: The characteristics of the medium voltage carrier communication channel in the high penetration power grid are analyzed, and the quality of the medium voltage carrier communication channel is determined by combining the interference signal of the medium voltage carrier communication channel and the fading factor of the medium voltage carrier communication channel. The specific analysis process is as follows: Calculate the signal-to-noise ratio of the medium voltage carrier communication channel in a high penetration power grid: Where SNR is the signal-to-noise ratio of the medium voltage carrier communication channel in the high penetration power grid, γ is the dynamic adjustment factor of the signal power stored in the database, and H decline is the channel multipath fading factor, N0 is the noise power spectrum density; Calculate the bit error rate of medium voltage carrier communication channel in high penetration power grid: Where BER is the bit error rate of the medium voltage carrier communication channel in the high penetration power grid, Bit error is the number of bit errors transmitted, Bit n is the total number of codes transmitted; Based on the signal-to-noise ratio of the medium-voltage carrier communication channel in the high-penetration power grid, the bit error rate of the medium-voltage carrier communication channel in the high-penetration power grid, the interference signal of the medium-voltage carrier communication channel and the fading factor of the medium-voltage carrier communication channel, the characteristics of the medium-voltage carrier communication channel are obtained through comprehensive analysis. The characteristics of the medium-voltage carrier communication channel are used as the analysis basis for determining the quality of the medium-voltage carrier communication channel. Medium voltage carrier communication channel characteristics, the specific calculation formula is: In the formula, Zbi xd is the medium voltage carrier communication channel characteristic, S decline is the fading factor of the medium voltage carrier communication channel, Chan inter is the interference signal of the medium voltage carrier communication channel, λ1 is the compensation factor of the set SNR, λ2 is the compensation factor of the set BER, and λ3 is the compensation factor of the set S decline The compensation factor of λ4 is the set Chan inter The compensation factor of A medium voltage carrier communication channel feature-medium voltage carrier communication channel quality mapping table pre-stored in a database is obtained, and a matching medium voltage carrier communication channel quality is found according to the medium voltage carrier communication channel feature by searching the mapping table.

7. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 1, characterized in that: The specific analysis process of obtaining the medium voltage carrier communication transmission demand is as follows: Get the medium voltage carrier communication transmission distance Zbc jl ; Get the target transmission rate Zbc of the medium voltage carrier communication channel sl ; The medium voltage carrier communication transmission distance and the medium voltage carrier communication channel target transmission rate are recorded as the medium voltage carrier communication transmission requirements.

8. A method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 7, characterized in that: The above-mentioned method combines the quality of the medium-voltage carrier communication channel to determine the optimal deployment scheme of the relay node and select the optimal frequency range of the medium-voltage carrier communication channel in the high-penetration power grid. The specific analysis process is as follows: The medium voltage carrier communication transmission distance, the medium voltage carrier communication channel target transmission rate and the medium voltage carrier communication channel quality are stored as specified tags, and a mapping table of specified tags and relay node optimization deployment solutions pre-stored in the database is obtained. By searching the mapping table, a matching relay node optimization deployment solution is found according to the specified tags; Calculate the frequency interval selection index of medium voltage carrier communication channel in high penetration power grid: In the formula, F sel (f min , f max ) is the interval [f min , f max ] in the medium voltage carrier communication channel frequency interval selection index in the high penetration power grid, For the interval [f min , f max ], B avail (f min , f max ) is the interval [f min , f max ] of available channel bandwidth, For setting The weight factor of B avail (f min , f max )’s weight factor; The frequency interval corresponding to the maximum value of each frequency interval selection index of the medium voltage carrier communication channel in the high penetration power grid is the optimized frequency interval of the medium voltage carrier communication channel in the high penetration power grid, f min For the interval [f min , f max ] frequency minimum value, f max For the interval [f min , f max ] is the maximum frequency value.

9. The method for optimizing medium voltage carrier communication in a high penetration power grid according to claim 1, characterized in that: The relay node forwarding delay model of the optimized deployment is constructed to determine whether the relay node forwarding efficiency is qualified, and determine the optimization scheme for the forwarding efficiency of unqualified relay nodes. The specific analysis process is as follows: Construct a relay node forwarding delay model with optimized deployment: Where, T relay is the total forwarding delay of the relay node, T proc is the processing delay of the relay node, ΔT proc is the allowed processing delay of the relay node stored in the database, T trans is the transmission delay of the relay node, ΔT trans is the allowed transmission delay of the relay node stored in the database, T queue is the queuing delay of the relay node, ΔT queue is the allowed queuing delay of the relay node stored in the database, φ1 is the set The compensation factor is φ2, which is the set The compensation factor is φ3, which is set The compensation factor of comparing the total forwarding delay of the relay node with the total forwarding bounded delay of the relay node stored in the database; If the total forwarding delay of the relay node is lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is qualified; If the total forwarding delay of the relay node is not lower than the total forwarding bounded delay of the relay node, the relay node forwarding efficiency corresponding to the total forwarding delay of the relay node is unqualified, and an optimization scheme mapping table of the total forwarding delay of the relay node-relay node forwarding efficiency pre-stored in the database is obtained. By searching the mapping table, a matching optimization scheme for the relay node forwarding efficiency is found according to the total forwarding delay of the relay node.

10. A medium voltage carrier communication optimization system in a high penetration power grid, applied to a medium voltage carrier communication optimization method in a high penetration power grid according to any one of claims 1 to 9, characterized in that: It includes a channel fading factor analysis module, a channel interference signal analysis module, a communication channel quality determination module, a relay node optimization deployment module and a forwarding efficiency optimization solution determination module, wherein: The channel fading factor analysis module is used to construct a medium-voltage carrier communication channel transmission model in a high-penetration power grid, analyze and obtain a channel multipath fading factor and a channel shadow fading factor, and obtain a medium-voltage carrier communication channel fading factor based on the channel multipath fading factor and the channel shadow fading factor; The channel interference signal analysis module is used to analyze the interference characteristics of the medium-voltage carrier communication channel in the high-penetration power grid to obtain the medium-voltage carrier communication channel interference signal; The communication channel quality determination module is used to analyze the characteristics of the medium-voltage carrier communication channel in the high-penetration power grid, and determine the quality of the medium-voltage carrier communication channel in combination with the medium-voltage carrier communication channel interference signal and the medium-voltage carrier communication channel fading factor; The relay node optimization deployment module is used to obtain the medium-voltage carrier communication transmission demand, determine the relay node optimization deployment plan and select the medium-voltage carrier communication channel optimization frequency range in the high-penetration power grid in combination with the medium-voltage carrier communication channel quality; The forwarding efficiency optimization scheme determination module is used to construct a forwarding delay model of the relay node that has completed the optimized deployment, determine whether the forwarding efficiency of the relay node is qualified, and determine the optimization scheme for the forwarding efficiency of unqualified relay nodes.

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