A power communication fault comprehensive diagnosis method

Abstract

The application provides a power communication fault comprehensive diagnosis method, comprising the following steps: starting analysis through a failure table address; module reading, detecting whether a module or a collector is damaged, a program being designed to read multiple times to prevent misjudgment and ensure detection accuracy; signal diagnosis, judging whether noise interference exists in a field, and finally outputting a result of whether noise interference exists through a series of processing such as FFT operation, power spectrum data processing and peak detection; carrier sensing, positioning a station area island or a station area string problem, and finally outputting a CCO address list, a neighborhood meter list, abnormal information and the like; integrating and analyzing information obtained through steps two to four, and finally outputting result information such as whether a module or a meter is damaged, whether there is noise interference, whether it is a station area island, whether it is a station area string and the like. The application can intuitively display investigation results of a module or a collector damage problem, an environmental noise problem, a station area island problem and a station area string problem.

Description

Technical Field

[0001] This invention relates to the technical field of power communication, and specifically to a comprehensive method for diagnosing power communication faults. Background Technology

[0002] A smart grid, or intelligent power grid, is built upon a high-speed, two-way communication network. Through the application of sensing and measurement technologies, advanced control methods, advanced equipment technologies, and advanced decision-making systems, it aims to achieve a reliable, safe, economical, efficient, and environmentally friendly power grid. The core concept of a smart grid is to realize the informatization, digitalization, automation, and interactivity of the power grid.

[0003] For fault location and analysis, current field analysis tools cannot perform full-link fault analysis and diagnosis of low-voltage acquisition systems. Furthermore, due to the complexity of technical issues in acquisition systems, it is difficult to judge and characterize them by simple manual observation. The mode of relying entirely on technical personnel for analysis is not only inefficient and unreliable, but also has many limitations in troubleshooting. Summary of the Invention

[0004] This invention provides a comprehensive diagnostic method for power communication faults to solve the technical problems mentioned in the background section.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A comprehensive diagnostic method for power communication faults includes the following steps:

[0007] Step 1: Begin analysis using the address of the failure table;

[0008] Step 2, module reading, to check whether the module or collector is damaged. The program is designed to read the data multiple times to prevent misjudgment and ensure detection accuracy.

[0009] Step 3: Signal diagnosis. Determine if there is noise interference in the field. Through a series of processes such as FFT operation, power spectrum data processing, and peak detection, the final output result shows whether there is noise interference.

[0010] Step four, carrier sensing, to locate the problem of isolated or cross-area transformers, and finally output the CCO address list, neighboring meter list, and abnormal information;

[0011] Step 5: Integrate and analyze the information obtained in steps 2 to 4, and finally output the results such as whether the module or meter is damaged, whether there is noise interference, whether it is an isolated transformer area, and whether it is connected to other transformer areas.

[0012] Furthermore, step two, specifically detecting whether the detection module or collector is damaged, includes the following steps:

[0013] Step 1: Start the reading process by using the table number;

[0014] Step two: The meter reader sends a beacon frame to start the network.

[0015] Step 3: The meter reader determines whether the target node is connected to the network. If it is connected, proceed to step 4; otherwise, proceed to step 5.

[0016] Step 4: Read the electricity meter in network access mode, create a meter reading frame and send it, then proceed to Step 6;

[0017] Step 5: Listen for the network ID of the monitoring station area; in non-network access mode, organize and send meter reading frames, then proceed to Step 6;

[0018] Step 6: Wait for the meter reading response. After the reading is completed, display the reading results.

[0019] Furthermore, after the module's reading function is activated, the reading parameters are selected, the processor generates the corresponding commands, the HPLC chip performs carrier transmission and reception, and returns the results to the processor. The processor stores the interaction messages to the SD card, and finally displays the results on the screen.

[0020] Furthermore, step three, determining whether there is noise interference at the scene, specifically includes the following steps:

[0021] Step 1: Click the start button to begin the analysis;

[0022] Step 2: Perform ADC sampling on the power line signal;

[0023] Step 3: FFT operation and processing to obtain frequency domain information of interference signal. This system performs FFT operation and processing through software. To ensure operation performance, parameters such as butterfly factor are obtained by table lookup.

[0024] Step four: The frequency domain data processing unit processes and identifies the frequency domain data obtained from the FFT operation. It processes the frequency domain data through methods such as cyclic sampling, maximum hold, power spectrum accumulation, and peak detection to make the power line environmental noise information processing results more accurate.

[0025] Furthermore, when sampling power line signals using an ADC, the HPLC communication technical specification defines four communication frequency bands, with the measured signal frequency band ranging from 0.7MHz to 12MHz. According to the sampling theorem, the sampling frequency should be greater than 24MHz. This system uses a sampling frequency of 25MHz to sample noise signals. The HPLC communication technical specification stipulates that the subcarrier spacing used for communication is 24.414KHz. To ensure accurate assessment of the impact of noise on HPLC communication, the minimum number of sampling points is 1024. This system involves 2048 sampling points per run, corresponding to a spectral resolution of 12.207KHz.

[0026] Furthermore, step three, which involves locating isolated or interconnected substations, specifically includes the following steps:

[0027] Step 1: Select the frequency band and begin listening;

[0028] Step two: The message listening module completes the initial listening and parsing of the carrier message and stores the original message in the SD card;

[0029] Step 3 involves message processing through two parts: beacon processing and management message frame processing.

[0030] Step four: The result output unit displays the processing results, such as the CCO address list, the neighboring meter list, and abnormal information. This information can be used to locate the islanding problem or the cross-area problem.

[0031] Furthermore, the message processing is carried out through two parts: beacon processing and management message frame processing. The beacon processing processes the received central beacon frames, proxy beacon frames, and discovery beacon frames, and obtains a list of nearby CCO addresses and nearby meters through beacon frame processing, which can be used to troubleshoot islanded or cross-area problems in transformer substations. The management message frame processing mainly processes network access request frames and network access request response frames, and provides prompts when anomalies are detected.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] This invention integrates three functions: module reading, signal diagnosis, impedance analysis, and carrier sensing. With a rationally designed execution flow, on-site personnel only need to connect the equipment and specify the target meter to initiate comprehensive analysis and generate a problem list. The results of troubleshooting issues such as module or data acquisition unit damage, environmental noise, isolated distribution areas, and cross-connection problems are displayed intuitively. This function is specifically designed for on-site problem diagnosis, requiring only one application to locate meter-level issues.

[0034] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0035] Figure 1 This is a flowchart illustrating the comprehensive diagnostic process of the present invention;

[0036] Figure 2 This is a flowchart of the module copying process of the present invention;

[0037] Figure 3 This is a flowchart of the carrier sensing process of the present invention;

[0038] Figure 4 This is a flowchart of the channel analysis process of the present invention;

[0039] Figure 5 This is a flowchart of the signal diagnosis process of the present invention. Detailed Implementation

[0040] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Example 1

[0044] Please refer to the appendix. Figure 1-4 A comprehensive diagnostic method for power communication faults includes the following steps:

[0045] Step 1: Begin analysis using the address of the failure table;

[0046] Step 2, module reading, to check whether the module or collector is damaged. The program is designed to read the data multiple times to prevent misjudgment and ensure detection accuracy.

[0047] Step 3: Signal diagnosis. Determine if there is noise interference in the field. Through a series of processes such as FFT operation, power spectrum data processing, and peak detection, the final output result shows whether there is noise interference.

[0048] Step four, carrier sensing, to locate the problem of isolated or cross-area transformers, and finally output the CCO address list, neighboring meter list, and abnormal information;

[0049] Step 5: Integrate and analyze the information obtained in steps 2 to 4, and finally output the results such as whether the module or meter is damaged, whether there is noise interference, whether it is an isolated transformer area, and whether it is connected to other transformer areas.

[0050] Furthermore, step two, specifically detecting whether the detection module or collector is damaged, includes the following steps:

[0051] Step 1: Start the reading process by using the table number;

[0052] Step two: The meter reader sends a beacon frame to start the network.

[0053] Step 3: The meter reader determines whether the target node is connected to the network. If it is connected, proceed to step 4; otherwise, proceed to step 5.

[0054] Step 4: Read the electricity meter in network access mode, create a meter reading frame and send it, then proceed to Step 6;

[0055] Step 5: Listen for the network ID of the monitoring station area; in non-network access mode, organize and send meter reading frames, then proceed to Step 6;

[0056] Step 6: Wait for the meter reading response. After the reading is completed, display the reading results.

[0057] Furthermore, after the module's reading function is activated, the reading parameters are selected, the processor generates the corresponding commands, the HPLC chip performs carrier transmission and reception, and returns the results to the processor. The processor stores the interaction messages to the SD card, and finally displays the results on the screen.

[0058] Furthermore, step three, determining whether there is noise interference at the scene, specifically includes the following steps:

[0059] Step 1: Click the start button to begin the analysis;

[0060] Step 2: Perform ADC sampling on the power line signal;

[0061] Step 3: FFT operation and processing to obtain frequency domain information of interference signal. This system performs FFT operation and processing through software. To ensure operation performance, parameters such as butterfly factor are obtained by table lookup.

[0062] Step four: The frequency domain data processing unit processes and identifies the frequency domain data obtained from the FFT operation. It processes the frequency domain data through methods such as cyclic sampling, maximum hold, power spectrum accumulation, and peak detection to make the power line environmental noise information processing results more accurate.

[0063] Furthermore, when sampling power line signals using an ADC, the HPLC communication technical specification defines four communication frequency bands, with the measured signal frequency band ranging from 0.7MHz to 12MHz. According to the sampling theorem, the sampling frequency should be greater than 24MHz. This system uses a sampling frequency of 25MHz to sample noise signals. The HPLC communication technical specification stipulates that the subcarrier spacing used for communication is 24.414KHz. To ensure accurate assessment of the impact of noise on HPLC communication, the minimum number of sampling points is 1024. This system involves 2048 sampling points per run, corresponding to a spectral resolution of 12.207KHz.

[0064] Furthermore, step three, which involves locating isolated or interconnected substations, specifically includes the following steps:

[0065] Step 1: Select the frequency band and begin listening;

[0066] Step two: The message listening module completes the initial listening and parsing of the carrier message and stores the original message in the SD card;

[0067] Step 3 involves message processing through two parts: beacon processing and management message frame processing.

[0068] Step four: The result output unit displays the processing results, such as the CCO address list, the neighboring meter list, and abnormal information. This information can be used to locate the islanding problem or the cross-area problem.

[0069] Furthermore, the message processing is carried out through two parts: beacon processing and management message frame processing. The beacon processing processes the received central beacon frames, proxy beacon frames, and discovery beacon frames, and obtains a list of nearby CCO addresses and nearby meters through beacon frame processing, which can be used to troubleshoot islanded or cross-area problems in transformer substations. The management message frame processing mainly processes network access request frames and network access request response frames, and provides prompts when anomalies are detected.

[0070] Example 2

[0071] A comprehensive diagnostic method for power communication faults includes the following steps:

[0072] Sp1, launch the application, enter the address of the failure table, and begin analysis.

[0073] SP2, module reading, is used to detect whether the module or data collector is damaged. The program is designed to read the data multiple times to prevent false judgments and ensure detection accuracy.

[0074] Sp3, signal diagnostics, is used to determine whether there is noise interference in the field. It outputs the result of whether there is noise interference through a series of processes such as FFT operation, power spectrum data processing, and peak detection.

[0075] Sp4, Carrier Sense, is used to locate isolated or cross-area problems in a transformer substation. This function ultimately outputs a list of CCO addresses, a list of neighboring meters, and abnormal information.

[0076] SP5, the comprehensive diagnostic tool integrates and analyzes the above information to output results such as whether the module or meter is damaged, whether there is noise interference, whether it is an isolated transformer area, and whether it is connected to another transformer area.

[0077] Furthermore, the comprehensive diagnostic function integrates module reading, signal diagnosis, impedance analysis, and carrier sensing, with a rationally designed execution flow. On-site, simply connect the equipment and specify the target meter to initiate comprehensive analysis and generate a problem list. The results of troubleshooting issues such as module or data acquisition unit damage, environmental noise, isolated distribution areas, and cross-contamination are displayed intuitively. This function is specifically designed for on-site problem diagnosis, requiring only one application to locate meter-level issues.

[0078] Further, the module copying process is as follows:

[0079] Sp1, launch the application, enter the table number to start the copying process.

[0080] SP2, the meter reader sends a beacon frame to start the network.

[0081] Sp3: The meter reader determines whether the target node has joined the network. If it has joined the network, it proceeds to Sp4; otherwise, it proceeds to Sp5.

[0082] SP4, in network access mode, reads the electricity meter, sets up and sends meter reading frames, then enters SP6.

[0083] SP5, listens for the network ID of the area, organizes and sends meter reading frames in non-network access mode, then enters SP6.

[0084] SP6, wait for meter reading response, and display the reading result after the reading is completed;

[0085] The module reading function is designed to locate module or data acquisition unit damage issues. This function allows for the determination of whether a module or data acquisition unit is damaged. The product should be adaptively compatible with reading modules or data acquisition units in all HPLC solutions. On-site reading of the meter is sufficient to verify whether the module or data acquisition unit is damaged. The function is simple to operate and provides clear results.

[0086] After the function is activated, the reading parameters are selected, the processor generates the corresponding commands, the HPLC chip performs carrier transmission and reception, and returns the results to the processor. The processor stores the interaction message to the SD card and displays the results on the screen. The module reading implementation process is shown in the figure below. The tool has networking capabilities. For offline modules in the field area, it can achieve network reading. For modules already connected to the network in the field area, it can listen to the network ID and use that network ID for module reading.

[0087] Furthermore, the carrier sensing process is shown in the following diagram:

[0088] Sp1, launch the application, select the frequency band, and start listening.

[0089] Sp2, the message listening module completes the initial listening and parsing of the carrier message and stores the original message in the SD card.

[0090] SP3 message processing is divided into two parts: beacon processing and management message frame processing. Beacon processing handles received central beacon frames, proxy beacon frames, and discovery beacon frames, obtaining a list of nearby CCO addresses and nearby meters, which can be used to troubleshoot islanded or interconnected transformer substation issues. Management message frame processing mainly handles network access request frames and network access request response frames, providing alerts when anomalies are detected.

[0091] Sp4, the result output unit displays the processing results, such as the CCO address list, the neighboring meter list, and abnormal information. This information can be used to locate the islanding problem or the cross-area problem.

[0092] The carrier sensing function is designed to address issues such as meter defects, isolated transformer substations, and cross-regional issues. On-site, problems at the end of the data acquisition link can be located by listening to carrier communication messages at the meter. This function analyzes the listened messages and presents the problem location results in a list format.

[0093] Furthermore, the signal diagnostic process is as follows:

[0094] Sp1, launch the application, and click the launch button to start the analysis.

[0095] Sp2 performs ADC sampling on the power line signal. The HPLC communication technical specification defines four communication frequency bands, as shown in Table 1-1. The frequency range of the measured signal is 0.7MHz to 12MHz. According to the sampling theorem, the sampling frequency should be greater than 24MHz. This system uses a sampling frequency of 25MHz to sample the noise signal. The HPLC communication technical specification stipulates that the subcarrier spacing used for communication is 24.414KHz. To ensure accurate assessment of the impact of noise on HPLC communication, the minimum number of sampling points is 1024. This system involves 2048 sampling points per run, corresponding to a spectral resolution of 12.207KHz.

[0096] Sp3 and FFT operations are performed to obtain frequency domain information of the interference signal. This system performs FFT operations in software. To ensure computational performance, parameters such as the butterfly factor are obtained by looking up tables.

[0097] Sp4, the frequency domain data processing unit, processes and identifies the frequency domain data obtained from FFT operations. It processes the frequency domain data through methods such as cyclic sampling, maximum hold, power spectrum accumulation, and peak detection, making the power line environmental noise information processing results more accurate.

[0098] The signal diagnostic function is designed to address environmental noise issues. This function allows for the measurement of environmental noise and the localization of noise sources. The device displays the measurement results graphically and provides alerts indicating whether the environmental noise level is excessive. Simultaneously, it records noise and interference data, providing a data foundation for laboratory simulations and retrospective analysis of on-site interference environments.

[0099] Signal diagnostic applications collect power line environmental noise and radio electromagnetic interference noise, analyze time-varying characteristics, amplitude-frequency characteristics, and noise variation patterns, and generate on-site noise intensity results for the transformer substation area.

[0100] Table 1-1 Communication Frequency Bands

[0101]

[0102] Furthermore, the signal transmission process is as follows:

[0103] Sp1, launch the application and click the launch button.

[0104] Sp2 encodes the test data information.

[0105] Sp3 performs IFFT operations based on the encoding results to generate a discrete-time signal.

[0106] Sp4 sends test signals through the DA converter chip and PA chip.

[0107] Sp5, repeat steps Sp2 to Sp4 according to a fixed cycle;

[0108] The signal analysis function is designed for in-depth research on power line communication theory, enabling the analysis of low-voltage power line impedance characteristics and providing basic data for low-voltage power line channel research.

[0109] Furthermore, the signal reception process is as follows:

[0110] Sp1, launch the application, and click the launch button to start the analysis.

[0111] Sp2, high-speed ADC sampling.

[0112] Sp3 performs an FFT operation on the sampled data to obtain frequency domain information.

[0113] Sp4 processes frequency domain data and extracts environmental noise information and transmitted signal information.

[0114] Sp5, information decoding, analyzes power line channel impedance information.

[0115] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A power communication fault comprehensive diagnosis method, characterized in that, It comprises the following steps: Step one, start analysis through the failure table address; Step two, module copy, detect whether the module or collector is damaged, the program designs multiple copy to prevent misjudgment and ensure detection accuracy; Step three, signal diagnosis, judge whether there is noise interference in the field, through FFT operation, power spectrum data processing, peak detection and a series of processing to finally output whether there is noise interference; Step four, carrier sensing, locate the problem of isolated or stringed area, finally output CCO address list, neighborhood meter list, abnormal information; Step five, integrate and analyze the information obtained from steps two to four, and finally output whether the module or meter is damaged, whether there is noise interference, whether it is an isolated area, and whether it is a stringed area; In step two, detecting whether the module or collector is damaged specifically comprises the following steps: Step one, start copy through the table number; Step two, the copy controller sends a beacon frame to start networking; Step three, the copy controller judges whether the target node is in the network, if yes, go to step four, otherwise go to step five; Step four, copy the meter in the network mode, group the meter frame and send it, go to step six; Step five, listen to the area network ID, organize and send the meter frame in the non-network mode, go to step six; Step six, wait for the meter response, and display the copy result after the copy is completed; In step three, judging whether there is noise interference in the field specifically comprises the following steps: Step one, click the start button to start analysis; Step two, ADC sampling of power line signal; Step three, FFT operation processing, get the frequency domain information of interference signal, the system performs FFT operation processing through software operation, to ensure the operation performance, the parameters are obtained by table lookup method; Step four, the frequency domain data processing unit processes and identifies the frequency domain data obtained by FFT operation, processes the frequency domain data through loop sampling, maximum retention, power spectrum accumulation and peak detection method, so that the power line environmental noise information processing result is more accurate; In step three, the positioning of isolated or stringed area problem specifically comprises the following steps: Step one, select the frequency band and start listening; Step two, the message listening module completes the preliminary listening and analysis of the carrier message, and stores the original message in the SD card; Step three, process the message through beacon frame processing and management message frame processing; Step four, the result output unit displays the processing result, including CCO address list, neighborhood meter list, abnormal information, through which the isolated area problem or stringed area problem can be located.

2. The method according to claim 1, wherein, After the module copy function is started, the copy parameter selection is performed, the corresponding command is generated by the processor, the HPLC chip executes carrier sending and receiving, and the result is returned to the processor, the processor stores the interactive message to the SD card, and finally the result is displayed on the screen.

3. The method according to claim 1, wherein, When ADC sampling of power line signal is performed, the measured signal frequency band range is 0.7MHz-12MHz, and 25MHz sampling frequency is adopted to sample the noise signal; the single sampling point number is 2048, and the corresponding frequency spectrum resolution is 12.207KHz.

4. The method according to claim 1, wherein, Through beacon frame processing and management message frame processing, the central beacon frame, proxy beacon frame and discovery beacon frame received are processed in the beacon frame processing, and the nearby CCO address list and the nearby meter list are obtained through the beacon frame processing, which can be used for troubleshooting of the isolated transformer area or the string transformer area; The management message frame processing mainly processes the network access request frame and the network access request response frame, and prompts when an exception is monitored.

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