Dual-mode communication system based on HPLC and HRF

Abstract

The invention discloses a dual-mode communication system based on HPLC (High Performance Liquid Chromatography) and HRF (High Frequency), which comprises a data acquisition module, a dual-mode communication module, an anomaly analysis and positioning module and an overhaul search notification module, and is characterized in that the dual-mode communication module is used for performing data transmission control and supervision on a concentrator and a plurality of intelligent electric meters in a power distribution network wirelessly through power line carriers and micropower; and the data acquisition module is used for processing the data delivered by the modulation-demodulation module. The invention relates to the technical field of power networking communication. According to the dual-mode communication system based on the HPLC and the HRF, the fault monitoring model can be established in the whole power grid dual-mode communication system to perform comprehensive fault detection and evaluation on each intelligent electric meter, the fault monitoring is accurate, the fault coping planning is comprehensive, and the reliability is high. The purposes of accurately monitoring the fault condition of each intelligent electric meter and reporting repair to the nearest repair station in the shortest time can be well achieved, and fault positioning and repair notification can be quickly carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of power network communication, and in particular to a dual-mode communication system based on HPLC and HRF. Background Art

[0002] HPLC is a high-speed power line carrier technology, and its operation depends on circuit reliability. A power outage means the channel is interrupted. In addition, the high impedance of the line will cause poor communication between stations. HRF is a high-speed wireless communication technology, and its operation is affected by the environment. Weather, building obstructions, and other factors can cause channel data frame loss. To overcome the dependence of HPLC technology on line reliability and the dependence of HRF technology on communication environment requirements, the HPLC+HRF dual-mode communication method has achieved complementary advantages. It has the characteristics of flexible networking, extremely low data frame loss rate, and strong environmental adaptability. This technology is also an important promotion direction for the State Grid Metering Center. In order to reduce the failure rate of dual-mode communication units, they need to be tested. HPLC+HRF dual-mode communication units are shipped in large quantities, and they need to be tested quickly and efficiently.

[0003] Referring to a method for detecting HPLC and HRF dual-mode communication units, disclosed in Chinese Patent Publication No. CN115987412A, the detection module's ZigBee wireless communication capability with a PC allows the PC to control the unit without manual operation. Simply by sending specific instructions, the dual-mode communication unit can be powered on and off. The ZigBee wireless collects test data, minimizing manual intervention, increasing detection speed, and reducing detection error rates. This method is of great significance to manufacturers of dual-mode communication units. In addition to basic detection items, this test method is scalable for detecting dual-mode communication units. By using the detection module's real-time monitoring data method for dual-mode communication units, the detection content can be expanded and extended, making the method adaptable to various environments.

[0004] Referring to the Chinese patent publication number CN117596674A, a routing networking communication system based on HPLC and HRF dual-mode communication modules is proposed. The time slot scheduling module achieves efficient message transmission, avoids communication congestion between multiple communication modules, and realizes effective collaboration between the HPLC carrier module and the HRF wireless module communication network. In addition, the dual-mode communication module uses high-speed power line carrier and high-speed wireless communication as signal transmission carriers, which greatly improves communication efficiency.

[0005] A comprehensive analysis of the above reference patents reveals the following defects:

[0006] The existing HPLC and HRF dual-mode communication systems are inaccurate in fault monitoring and have incomplete fault response planning. They cannot accurately detect and evaluate faults in the entire power dual-mode communication system, resulting in the inability to quickly locate the fault and notify maintenance when a smart meter fails. It is impossible to establish a fault monitoring model in the entire power grid dual-mode communication system to conduct comprehensive fault detection and evaluation of each smart meter. It is impossible to achieve the goal of accurately monitoring the fault conditions of each smart meter and reporting the problem to the nearest maintenance station in the shortest time, which is very detrimental to the stable operation of the entire power grid dual-mode communication system. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In response to the deficiencies in the prior art, the present invention provides a dual-mode communication system based on HPLC and HRF, which solves the problems of inaccurate fault monitoring and incomplete fault response planning of the existing HPLC and HRF dual-mode communication systems, and the inability to accurately perform fault detection and evaluation on the entire power dual-mode communication system. As a result, when a smart meter fails, it is impossible to quickly locate the fault and notify maintenance, and it is impossible to establish a fault monitoring model in the entire power grid dual-mode communication system to perform comprehensive fault detection and evaluation on each smart meter. It is impossible to achieve the purpose of both accurately monitoring the fault conditions of each smart meter and reporting the fault to the nearest maintenance station in the shortest time, which is very detrimental to the stable operation of the entire power grid dual-mode communication system.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dual-mode communication system based on HPLC and HRF, including a data acquisition module, a dual-mode communication module, an abnormality analysis and positioning module, and a maintenance search and notification module. The dual-mode communication module controls and monitors data transmission for a concentrator and several smart meters in a distribution network through power line carrier and micro-power wireless, and the data acquisition module is used to process data delivered by the modulation and demodulation module. The data acquisition module is used to obtain the modulated signal after carrier demodulation on the power line and perform preprocessing operations on the collected modulated signal;

[0011] The abnormality analysis and positioning module performs abnormality detection and identification on the signal based on the pre-processed modulated signal, accurately locates the fault according to the abnormality detection and identification results, and determines the location and range of the fault.

[0012] Preferably, the acquisition and preprocessing process of the modulated signal in the data acquisition module includes: using data acquisition equipment to capture the modulated signal after carrier demodulation from the power line, including sending performance indicators and electrical performance indicators, performing preprocessing operations on the collected modulated signal, including data cleaning, data preprocessing and signal denoising steps, and processing the signal through a smoothing algorithm to unify the dimension and numerical range of the signal.

[0013] Preferably, the dual-mode communication module can route and forward the data with the destination address of the distribution network concentrator and several smart meters as their own and non-their own data, complete business data interaction and business priority scheduling, compete for physical channels through the two channel access mechanisms of CSMA and TDMA, and the wireless channel scanning and selection switching mechanism, to achieve reliable transmission of data messages between the two channels and multiple nodes, disconnection detection, access networking and routing addressing management.

[0014] Preferably, the dual-mode communication module is used to send high-speed carrier signals or high-speed wireless signals to the power line medium or radiate them into space, and at the same time receive high-speed carrier signals from the power line medium or high-speed wireless signals radiated into space and demodulate them into data messages.

[0015] Preferably, the abnormality analysis and positioning module analyzes the transmission performance index and the electrical performance index based on the preprocessed modulated signal, extracts characteristic data of the transmission performance index and the electrical performance index respectively, and then for each characteristic data, determines the normal value of each characteristic data based on historical data and standard specifications, compares the extracted characteristic data with the normal value, identifies the characteristic data that deviates from the normal value as an abnormal value, analyzes the difference between each characteristic data of the transmission performance index and the normal value, calculates the deviation degree of each characteristic data, and based on the deviation degree of each characteristic data, comprehensively calculates the transmission performance trend index, and analyzes the transmission performance index trend of the modulated signal;

[0016] The expression of the transmission performance trend index is:

[0017]

[0018] Among them, X is the transmission performance trend index, i is the transmission performance index index, T i is the actual measured value of each transmission performance indicator, M i is the benchmark value of the energy index, R i The standardized deviation degree of each transmission performance index is w i is the weight coefficient, and The value of X ranges from 0 to 1, where 1 means that all indicators are in the best state and 0 means that at least one indicator deviates seriously from the baseline value.

[0019] Preferably, the difference between each characteristic data of the electrical performance index and the normal value is analyzed, the deviation degree of each characteristic data is calculated, and based on the deviation degree of each characteristic data, the electrical performance trend index is comprehensively calculated to analyze the electrical performance index trend of the modulated signal;

[0020] The expression of the electrical performance trend index is:

[0021]

[0022] Among them, Y is the electrical performance trend index, j is the electrical performance index index, y j is the actual measured value of each electrical performance index, B j is the reference value of each electrical performance index, y j , min and y j , max respectively represent the minimum and maximum values of each electrical performance index, which are used to standardize the degree of deviation. The value range of EI is between 0 and 1, where 1 means that all indicators are in the best state, and 0 means that at least one indicator deviates seriously from the benchmark value;

[0023] By calculating the trend index of transmission performance and electrical performance, the abnormal modulation signals on the power line are analyzed. Abnormal modulation signals are manifested as significant changes in transmission performance or electrical performance, or both. The abnormal modulation signals are further analyzed to determine their source, nature and impact range.

[0024] Preferably, the abnormality analysis and positioning module accurately locates the fault based on the abnormality detection and identification results, specifically, determines whether the smart meter is in faulty communication based on the transmission performance trend index X and the electrical performance trend index Y. If it is determined to be faulty communication, the geographical location information of the current faulty smart meter is obtained, and the maintenance location analysis algorithm in the maintenance search notification module is used to screen out the nearest maintenance station within the geographical location of the faulty smart meter, and send a maintenance notification to the nearest maintenance station within the geographical location of the faulty smart meter.

[0025] Preferably, the maintenance location analysis algorithm specifically includes the following steps:

[0026] S1, obtain the geographical location information of the faulty smart meter, and take the geographical location of the faulty smart meter as the center and use r1, r2, r3, ..., r n-1 、r n The gradient search radius is used to locate each maintenance station within the area;

[0027] The gradient search radius satisfies the following conditions:

[0028]

[0029] Among them, rn is the nth gradient search radius, r n-1 is the n-1th gradient search radius, a is the minimum radius gradient difference, and b is the maximum radius gradient difference;

[0030] S2. When searching for a maintenance station around the faulty smart meter with a search radius of r1, if a maintenance station with the shortest distance and no other maintenance tasks is found, a maintenance notification is sent to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type.

[0031] S3. If no maintenance station is found, continue searching for maintenance stations with a radius gradient difference of a until the nearest maintenance station with no other maintenance tasks is found. Then, send a maintenance notification to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type.

[0032] S4. If the searched maintenance station has other maintenance tasks and cannot perform immediate maintenance, the search for maintenance stations will continue with the search radius with a radius gradient difference of b, until the nearest maintenance station with no other maintenance tasks is found, and a maintenance notification will be sent to the maintenance station, along with the geographical location information of the faulty smart meter and the type of fault.

[0033] Preferably, the abnormal analysis and positioning module can combine the fault types in the historical maintenance database to divide the power system fault levels into different levels, namely, minor fault level, general fault level, serious fault level and emergency fault level. Based on the value of the fault assessment coefficient and the divided fault level, the corresponding fault evaluation threshold is matched for each fault level, and the calculated fault assessment coefficient is compared with the set fault evaluation threshold to determine the level of the fault.

[0034] Preferably, the characteristics of the transmission performance indicators include signal strength, spectrum purity, carrier frequency stability and signal modulation error, and the characteristics of the electrical performance indicators include voltage fluctuation, current stability, phase deviation and power factor.

[0035] (3) Beneficial effects

[0036] The present invention provides a dual-mode communication system based on HPLC and HRF. Compared with the existing technology, the dual-mode communication system based on HPLC and HRF has the following advantages: the dual-mode communication system based on HPLC and HRF includes a data acquisition module, a dual-mode communication module, an abnormality analysis and positioning module, and a maintenance search and notification module. The dual-mode communication module controls and monitors data transmission between a concentrator and several smart meters in a distribution network via power line carrier and micro-power wireless. The data acquisition module processes data delivered by the modulation and demodulation module, obtains the modulated signal after carrier demodulation on the power line, and performs pre-processing operations on the collected modulated signal. By establishing a fault monitoring model in the entire power grid dual-mode communication system, the system can comprehensively detect and evaluate faults in each smart meter. The system provides accurate fault monitoring and comprehensive fault response planning, effectively achieving the goals of accurately monitoring the fault conditions of each smart meter and reporting repairs to the nearest maintenance station in the shortest possible time. The system can quickly locate faults and provide maintenance notifications, thus significantly contributing to the stable operation of the entire power grid dual-mode communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural principle block diagram of the system of the present invention;

[0038] Figure 2 Schematic diagram of the principle of the maintenance position analysis algorithm of the present invention. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figure 1-2 The present invention provides three technical solutions: a dual-mode communication system based on HPLC and HRF, specifically including the following embodiments:

[0041] Example 1: A dual-mode communication system based on HPLC and HRF, including a data acquisition module, a dual-mode communication module, an abnormality analysis and positioning module, and a maintenance search and notification module. The dual-mode communication module controls and monitors data transmission to a concentrator and several smart meters in a distribution network via power line carrier and micropower wireless. The data acquisition module processes data delivered by the modulation and demodulation module, obtains a modulated signal after carrier demodulation on the power line, and performs preprocessing operations on the collected modulated signal.

[0042] The abnormality analysis and positioning module detects and identifies abnormalities in the signal based on the preprocessed modulated signal, accurately locates the fault based on the abnormality detection and identification results, and determines the location and scope of the fault.

[0043] In an embodiment of the present invention, the acquisition and preprocessing process of the modulated signal in the data acquisition module includes: using a data acquisition device to capture the modulated signal after carrier demodulation from the power line, including transmission performance indicators and electrical performance indicators, performing preprocessing operations on the collected modulated signal, including data cleaning, data preprocessing and signal denoising steps, and processing the signal through a smoothing algorithm to unify the dimension and numerical range of the signal.

[0044] In the embodiment of the present invention, the dual-mode communication module can route and forward data with the destination address of the distribution network concentrator and several smart meters and data not belonging to the smart meters, complete business data interaction and business priority scheduling, and through the CSMA and TDMA channel access mechanisms to compete for physical channels and the wireless channel scanning and selection switching mechanism, realize the reliable transmission of data messages between the two channels and multiple nodes, disconnection detection, access networking and routing addressing management.

[0045] In an embodiment of the present invention, the dual-mode communication module is used to send high-speed carrier signals or high-speed wireless signals to the power line medium or radiate them into space, and at the same time receive high-speed carrier signals from the power line medium or high-speed wireless signals radiated into space and demodulate them into data messages.

[0046] In an embodiment of the present invention, the abnormality analysis and positioning module analyzes the transmission performance index and the electrical performance index based on the preprocessed modulated signal, extracts characteristic data of the transmission performance index and the electrical performance index respectively, and then, for each characteristic data, determines the normal value of each characteristic data based on historical data and standard specifications, compares the extracted characteristic data with the normal value, identifies characteristic data that deviates from the normal value as an abnormal value, analyzes the difference between each characteristic data of the transmission performance index and the normal value, calculates the degree of deviation of each characteristic data, and comprehensively calculates the transmission performance trend index based on the degree of deviation of each characteristic data, thereby analyzing the transmission performance index trend of the modulated signal;

[0047] The expression of the sending performance trend index is:

[0048]

[0049] Among them, X is the transmission performance trend index, i is the transmission performance index index, T i is the actual measured value of each transmission performance indicator, M i is the benchmark value of the energy index, R i The standardized deviation degree of each transmission performance index is w i is the weight coefficient, and The value of X ranges from 0 to 1, where 1 means that all indicators are in the best state and 0 means that at least one indicator deviates seriously from the baseline value.

[0050] Example 2: The technical solution of the embodiment of the present invention is different from that of the embodiment in that: the difference between each characteristic data of the electrical performance index and the normal value is analyzed, the deviation degree of each characteristic data is calculated, and based on the deviation degree of each characteristic data, the electrical performance trend index is comprehensively calculated to analyze the electrical performance index trend of the modulated signal;

[0051] The expression of electrical performance trend index is:

[0052]

[0053] Among them, Y is the electrical performance trend index, j is the electrical performance index index, y j is the actual measured value of each electrical performance index, B j is the reference value of each electrical performance index, y j , min and y j , max respectively represent the minimum and maximum values of each electrical performance index, which are used to standardize the degree of deviation. The value range of EI is between 0 and 1, where 1 means that all indicators are in the best state, and 0 means that at least one indicator deviates seriously from the benchmark value;

[0054] By calculating the trend index of transmission performance and electrical performance, the abnormal modulation signals on the power line are analyzed. Abnormal modulation signals are manifested as significant changes in transmission performance or electrical performance, or both. The abnormal modulation signals are further analyzed to determine their source, nature and impact range.

[0055] In an embodiment of the present invention, the abnormality analysis and positioning module accurately locates the fault based on the abnormality detection and identification results. Specifically, it determines whether the smart meter is in fault communication based on the transmission performance trend index X and the electrical performance trend index Y. If it is determined to be fault communication, the geographical location information of the current faulty smart meter is obtained, and the maintenance location analysis algorithm in the maintenance search notification module is used to screen out the nearest maintenance station within the geographical location of the faulty smart meter, and send a maintenance notification to the nearest maintenance station within the geographical location of the faulty smart meter.

[0056] Example 3: The technical solution of the embodiment of the present invention is different from that of the embodiment in that: the maintenance position analysis algorithm specifically includes the following steps:

[0057] S1, obtain the geographical location information of the faulty smart meter, and take the geographical location of the faulty smart meter as the center and use r1, r2, r3, ..., r n-1 、r nThe gradient search radius is the location of each maintenance station within the area;

[0058] The gradient search radius satisfies the following conditions:

[0059]

[0060] Among them, r n is the nth gradient search radius, r n-1 is the n-1th gradient search radius, a is the minimum radius gradient difference, and b is the maximum radius gradient difference;

[0061] S2. When searching for a maintenance station around the faulty smart meter with a search radius of r1, if a maintenance station with the shortest distance and no other maintenance tasks is found, a maintenance notification is sent to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type.

[0062] S3. If no maintenance station is found, continue searching for maintenance stations with a radius gradient difference of a until the nearest maintenance station with no other maintenance tasks is found. Then, send a maintenance notification to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type.

[0063] S4. If the searched maintenance station has other maintenance tasks and cannot perform immediate maintenance, the search for maintenance stations will continue with the search radius with a radius gradient difference of b, until the nearest maintenance station with no other maintenance tasks is found, and a maintenance notification will be sent to the maintenance station, along with the geographical location information of the faulty smart meter and the type of fault.

[0064] In an embodiment of the present invention, the abnormal analysis and positioning module can combine the fault types in the historical maintenance database to divide the power system fault levels into different levels, namely, minor fault level, general fault level, serious fault level and emergency fault level. Based on the value of the fault assessment coefficient and the divided fault level, the corresponding fault evaluation threshold is matched for each fault level, and the calculated fault assessment coefficient is compared with the set fault evaluation threshold to determine the level of the fault.

[0065] In an embodiment of the present invention, the characteristics of the transmission performance indicators include signal strength, spectrum purity, carrier frequency stability and signal modulation error, and the characteristics of the electrical performance indicators include voltage fluctuation, current stability, phase deviation and power factor.

[0066] In summary, the present invention can realize comprehensive fault detection and evaluation of each smart meter by establishing a fault monitoring model in the entire power grid dual-mode communication system. The fault monitoring is accurate and the fault response planning is comprehensive. It achieves the purpose of accurately monitoring the fault conditions of each smart meter and reporting to the nearest maintenance station in the shortest time. It can quickly locate the fault and notify the maintenance, which is very beneficial to the stable operation of the entire power grid dual-mode communication system.

[0067] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0068] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-mode communication system based on HPLC and HRF, comprising a data acquisition module, a dual-mode communication module, an abnormality analysis and positioning module, and a maintenance search and notification module, characterized in that: The dual-mode communication module controls and supervises data transmission of the concentrator and several smart meters in the distribution network through power line carrier and micro-power wireless, and the data acquisition module is used to process the data delivered by the modulation and demodulation module. The data acquisition module is used to obtain the modulation signal after carrier demodulation on the power line and perform pre-processing operations on the acquired modulation signal; The abnormality analysis and positioning module performs abnormality detection and identification on the signal based on the pre-processed modulated signal, accurately locates the fault according to the abnormality detection and identification results, and determines the location and range of the fault.

2. A dual-mode communication system based on HPLC and HRF according to claim 1, characterized in that: The acquisition and preprocessing process of the modulated signal in the data acquisition module includes: using data acquisition equipment to capture the modulated signal after carrier demodulation from the power line, including transmission performance indicators and electrical performance indicators, performing preprocessing operations on the collected modulated signal, including data cleaning, data preprocessing and signal denoising steps, and processing the signal through a smoothing algorithm to unify the signal dimension and numerical range.

3. A dual-mode communication system based on HPLC and HRF according to claim 1, characterized in that: The dual-mode communication module can route and forward data with the destination address of the distribution network concentrator and several smart meters, as well as data other than their own, to complete business data interaction and business priority scheduling. It competes for physical channels through the CSMA and TDMA channel access mechanisms, and implements a wireless channel scanning and selection switching mechanism to achieve reliable transmission of data messages between the two channels and multiple nodes, offline detection, access networking, and routing addressing management.

4. A dual-mode communication system based on HPLC and HRF according to claim 1, characterized in that: The dual-mode communication module is used to send high-speed carrier signals or high-speed wireless signals to the power line medium or radiate them into space, and at the same time receive high-speed carrier signals from the power line medium or high-speed wireless signals radiated into space and demodulate them into data messages.

5. A dual-mode communication system based on HPLC and HRF according to claim 1, characterized in that: The abnormality analysis and positioning module analyzes the transmission performance index and the electrical performance index based on the preprocessed modulated signal, extracts characteristic data of the transmission performance index and the electrical performance index respectively, and then determines the normal value of each characteristic data based on historical data and standard specifications, compares the extracted characteristic data with the normal value, identifies characteristic data that deviates from the normal value as an abnormal value, analyzes the difference between each characteristic data of the transmission performance index and the normal value, calculates the deviation degree of each characteristic data, and comprehensively calculates the transmission performance trend index based on the deviation degree of each characteristic data, and analyzes the transmission performance index trend of the modulated signal; The expression of the transmission performance trend index is: Among them, X is the transmission performance trend index, i is the transmission performance index index, T i is the actual measured value of each transmission performance indicator, M i is the benchmark value of the energy index, R i The standardized deviation degree of each transmission performance index is w i is the weight coefficient, and The value of X ranges from 0 to 1, where 1 means that all indicators are in the best state and 0 means that at least one indicator deviates seriously from the baseline value.

6. A dual-mode communication system based on HPLC and HRF according to claim 5, characterized in that: Analyze the difference between each characteristic data of the electrical performance index and the normal value, calculate the deviation degree of each characteristic data, and based on the deviation degree of each characteristic data, comprehensively calculate the electrical performance trend index to analyze the electrical performance index trend of the modulated signal; The expression of the electrical performance trend index is: Among them, Y is the electrical performance trend index, j is the electrical performance index index, y j is the actual measured value of each electrical performance index, B j is the reference value of each electrical performance index, y j , min and y j , max respectively represent the minimum and maximum values of each electrical performance index, which are used to standardize the degree of deviation. The value range of EI is between 0 and 1, where 1 means that all indicators are in the best state, and 0 means that at least one indicator deviates seriously from the benchmark value; By calculating the trend index of transmission performance and electrical performance, the abnormal modulation signals on the power line are analyzed. Abnormal modulation signals are manifested as significant changes in transmission performance or electrical performance, or both. The abnormal modulation signals are further analyzed to determine their source, nature and impact range.

7. A dual-mode communication system based on HPLC and HRF according to claim 6, characterized in that: The abnormality analysis and positioning module accurately locates the fault based on the abnormality detection and identification results. Specifically, it determines whether the smart meter is in faulty communication based on the transmission performance trend index X and the electrical performance trend index Y. If it is determined to be faulty communication, the geographical location information of the current faulty smart meter is obtained, and the maintenance location analysis algorithm in the maintenance search notification module is used to screen out the nearest maintenance station within the geographical location of the faulty smart meter, and send a maintenance notification to the nearest maintenance station within the geographical location of the faulty smart meter.

8. A dual-mode communication system based on HPLC and HRF according to claim 7, characterized in that: The maintenance position analysis algorithm specifically includes the following steps: S1, obtain the geographical location information of the faulty smart meter, and take the geographical location of the faulty smart meter as the center and use r1, r2, r3, ..., r n-1 、r n The gradient search radius is used to locate each maintenance station within the area; The gradient search radius satisfies the following conditions: Among them, r n is the nth gradient search radius, r n-1 is the n-1th gradient search radius, a is the minimum radius gradient difference, and b is the maximum radius gradient difference; S2. When searching for a maintenance station around the faulty smart meter with a search radius of r1, if a maintenance station with the shortest distance and no other maintenance tasks is found, a maintenance notification is sent to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type. S3. If no maintenance station is found, continue searching for maintenance stations with a radius gradient difference of a until the nearest maintenance station with no other maintenance tasks is found. Then, send a maintenance notification to the maintenance station, along with the geographical location information of the faulty smart meter and the fault type. S4. If the searched maintenance station has other maintenance tasks and cannot perform immediate maintenance, the search for maintenance stations will continue with the search radius with a radius gradient difference of b, until the nearest maintenance station with no other maintenance tasks is found, and a maintenance notification will be sent to the maintenance station, along with the geographical location information of the faulty smart meter and the type of fault.

9. A dual-mode communication system based on HPLC and HRF according to claim 1, characterized in that: The abnormal analysis and positioning module can combine the fault types in the historical maintenance database to divide the power system fault levels into different levels, namely, minor fault level, general fault level, serious fault level and emergency fault level. Based on the value of the fault assessment coefficient and the divided fault level, the module matches the corresponding fault evaluation threshold for each fault level, compares the calculated fault assessment coefficient with the set fault evaluation threshold, and determines the level of the fault.

10. The dual-mode communication system based on HPLC and HRF according to claim 5, characterized in that: The characteristics of the transmission performance indicators include signal strength, spectrum purity, carrier frequency stability and signal modulation error, and the characteristics of the electrical performance indicators include voltage fluctuation, current stability, phase deviation and power factor.

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