Optimization method, system and device for leaky cable monitoring system

Abstract

This invention provides an optimized method, system, and equipment for a leaky cable monitoring system, relating to the field of railway cable monitoring technology. The method includes: synchronously acquiring grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; displaying the grounding current or partial discharge parameters, and simultaneously displaying the temperature and humidity with the displayed grounding current or partial discharge parameters; comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, and generating a warning message when any parameter exceeds the corresponding warning threshold. This invention, through simultaneous acquisition of multiple parameters, simultaneous display, and comprehensive warning, achieves multi-dimensional real-time monitoring of cable insulation status, improving the comprehensiveness of monitoring and the timeliness of warnings, and is suitable for online monitoring and status assessment of railway high-voltage cables.

Description

Technical Field

[0001] This invention relates to the field of railway cable monitoring technology, and in particular to an optimization method, system and equipment for a leaky cable monitoring system. Background Technology

[0002] The insulation condition of railway high-voltage cables is directly related to the safe operation of the traction power supply system. Real-time monitoring of key parameters such as cable grounding current, partial discharge, temperature and humidity is an important means to detect insulation deterioration and prevent cable faults in a timely manner.

[0003] Currently, the mainstream technology in railway cable leakage current monitoring mainly focuses on online monitoring of grounding leakage current. For example, a monitoring loop is formed by connecting a relay and a grounding resistor in series between the shield and the core wire of the cable under test, and leakage current data is obtained using an isolated sampling method to achieve online monitoring of cable-to-ground leakage current. However, existing technologies generally have the following shortcomings: First, the monitoring parameters are singular, only monitoring grounding current, without integrating key state parameters such as partial discharge, temperature, and humidity, which easily leads to missed or false fault detections; second, the monitoring functions are independent, making it impossible to achieve integrated monitoring and comprehensive analysis of multiple parameters; third, the early warning dimensions are lacking, making it impossible to provide timely warnings of early signs of cable insulation degradation; fourth, data display and analysis are insufficient, making it difficult to analyze the impact of environmental factors on the cable insulation state; and fifth, the parameter configuration flexibility is poor, making it impossible to adjust the early warning standards according to different laying environments and cable models, resulting in poor adaptability.

[0004] Therefore, there is an urgent need to design an optimized solution for a leaky cable monitoring system that can achieve integrated monitoring and early warning of grounding current, partial discharge, temperature and humidity, in order to solve the problems of single monitoring parameters, independent functions, lack of early warning, insufficient analysis and poor adaptability in the existing technology. Summary of the Invention

[0005] This invention provides an optimization method, system, and device for a leaky cable monitoring system, which solves the problems of single monitoring parameters, independent functions, lack of early warning, insufficient analysis, and poor adaptability in the prior art.

[0006] This invention provides an optimization method for a leaky cable monitoring system. The method includes: synchronously collecting grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; displaying the grounding current or partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, and generating a warning message when any parameter exceeds the corresponding warning threshold.

[0007] According to the optimization method of the cable leakage monitoring system provided by the present invention, the partial discharge parameters of the cable are collected synchronously, including: collecting the pulse signal of partial discharge of the cable; filtering and amplifying the pulse signal; and analyzing the discharge amplitude and discharge frequency from the processed pulse signal.

[0008] An optimization method for a leaky cable monitoring system provided by the present invention displays grounding current or partial discharge parameters, and displays temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, comprising: providing a monitoring type selection operation, the monitoring type selection operation including at least a first monitoring mode and a second monitoring mode; in response to the selection of the first monitoring mode, displaying a waveform of the grounding current, and displaying temperature and humidity on the same screen; in response to the selection of the second monitoring mode, displaying a waveform related to the partial discharge parameters, and displaying temperature and humidity on the same screen.

[0009] According to the optimization method of the leaky cable monitoring system provided by the present invention, the waveform diagrams related to the partial discharge parameters include: a first waveform diagram for representing the trend of discharge amplitude changing over time, and a second waveform diagram for representing the trend of discharge frequency changing over time.

[0010] According to the present invention, an optimization method for a leaky cable monitoring system is provided, the method further includes: updating the warning threshold in response to a user's configuration operation.

[0011] According to an optimization method for a leaky cable monitoring system provided by the present invention, grounding current, temperature, humidity, discharge amplitude, and discharge frequency are compared with their respective early warning thresholds. When any parameter exceeds the corresponding early warning threshold, an early warning message is generated. This includes: comparing temperature with a temperature early warning threshold; if the temperature exceeds the threshold, a temperature over-limit early warning message is generated; comparing humidity with a humidity early warning threshold; if the humidity exceeds the threshold, a humidity over-limit early warning message is generated; comparing discharge amplitude with an amplitude early warning threshold; if the discharge amplitude exceeds the amplitude early warning threshold, an amplitude over-limit early warning message is generated; and comparing discharge frequency with a frequency early warning threshold; if the frequency exceeds the frequency early warning threshold, a frequency over-limit early warning message is generated.

[0012] According to the optimization method of the leaky cable monitoring system provided by the present invention, the method further includes: processing grounding current, temperature, humidity, discharge amplitude, and discharge frequency to generate multi-parameter monitoring data; displaying grounding current or partial discharge parameters and displaying temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, including: displaying grounding current or partial discharge parameters in the multi-parameter monitoring data; displaying temperature and humidity in the multi-parameter monitoring data on the same screen as the displayed grounding current or partial discharge parameters; comparing grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding early warning thresholds, including: comparing grounding current, temperature, humidity, discharge amplitude, and discharge frequency in the multi-parameter monitoring data with their respective corresponding early warning thresholds.

[0013] According to the present invention, an optimization method for a leaky cable monitoring system is provided, which further includes: storing grounding current, temperature, humidity, discharge amplitude and discharge frequency, as well as early warning information, and classifying, statistically analyzing and recording them.

[0014] This invention also provides an optimized system for a leaky cable monitoring system, comprising: a sensing module for synchronously collecting grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; a display module connected to the sensing module for displaying the grounding current or partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; and an early warning module connected to the sensing module for comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding early warning thresholds, and generating an early warning message when any parameter exceeds the corresponding early warning threshold.

[0015] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein an optimization method for a leaky cable monitoring system is implemented when the processor executes the computer program.

[0016] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the optimization method of the leaky cable monitoring system described in any of the above claims.

[0017] The present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements the optimization method for the leaky cable monitoring system described in any of the above claims.

[0018] The optimized method, system, and equipment for a leaky cable monitoring system provided by this invention expands single-parameter monitoring into a multi-dimensional monitoring system covering electrical parameters, environmental parameters, and insulation degradation characteristic parameters by simultaneously collecting grounding current, temperature, humidity, and partial discharge parameters of the cable, breaking down the information silos of existing technologies. By displaying temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, the linkage and visualization of environmental factors and electrical status data are realized, providing an intuitive data foundation for analyzing the impact of the environment on the insulation status. By comparing grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective warning thresholds, a warning message is generated when any parameter exceeds the threshold, upgrading a single leakage warning to a multi-parameter comprehensive warning. This enables timely capture of early signs of cable insulation degradation, thereby realizing multi-dimensional real-time monitoring of the insulation status of railway high-voltage cables and improving the comprehensiveness of monitoring and the timeliness of warnings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the monitoring interface in the ground current monitoring mode of an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the monitoring interface in the partial discharge monitoring mode of an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram illustrating the multi-parameter early warning area in an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the configuration items on the parameter setting page in an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of an optimized system of a leaky cable monitoring system provided in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] It should be noted that the optimization method of the leaky cable monitoring system of the present invention is applied to the online monitoring scenario of railway cable insulation status. The system is based on the existing leaky cable monitoring system in the railway field and is optimized and modified. The existing leaky cable monitoring system includes a grounding current monitoring module, a data transmission channel, a microcontroller unit (MCU), and a host computer application terminal. The present invention achieves multi-parameter integrated monitoring and comprehensive early warning without changing the core hardware and basic logic of the original system.

[0029] To facilitate understanding of the implementation basis of the method of this invention, the hardware and software components of the leaky cable monitoring and optimization system of this invention are described below in the form of a system architecture overview, including: Sensing layer: grounding current sensor + temperature and humidity sensor + high frequency current transformer (HFCT); Transmission layer: Controller Area Network (CAN) bus / 4th Generation Mobile Communication Technology (4G) / optical fiber (reusing the original transmission channel); Processing layer: MCU (with added multi-parameter data acquisition and parsing logic); Application layer: real-time monitoring display + multi-parameter early warning + monitoring information statistics + alarm log + parameter settings.

[0030] The following is combined Figure 1 This invention describes an optimization method for the leaky cable monitoring system. For consistency, the entity performing this method will be uniformly referred to as the system, and will not be described further thereafter.

[0031] Figure 1 This is a flowchart illustrating an optimization method for a leaky cable monitoring system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the method includes the following: S101. Synchronously collect the grounding current, temperature, humidity, and partial discharge parameters of the cable.

[0032] In this embodiment of the invention, synchronous acquisition means that each sensor uses the same sampling frequency to perform data acquisition, ensuring the time synchronization of multi-channel acquired data.

[0033] Among them, the partial discharge parameters include at least the discharge amplitude and the discharge frequency.

[0034] In some embodiments, the aforementioned grounding current, temperature, and humidity can be acquired in the following ways: the grounding current data of the cable circuit under test is acquired through the grounding current sensor of the existing grounding current monitoring module; the temperature and humidity environmental parameters of the corresponding installation location are acquired synchronously through the patch-type temperature and humidity sensor; the analog signals acquired by each sensor are synchronously transmitted to the corresponding AD conversion channel to complete the conversion of analog signals to digital signals.

[0035] For example, in the scenario of cable laying in railway tunnels, a patch-type temperature and humidity sensor can be installed at each grounding point and intermediate joint of the cable, in the same position as the original grounding current sensor. The sensor is cascaded with the original monitoring unit to realize the synchronous acquisition of temperature and humidity analog signals.

[0036] Specifically, the temperature signal collected by the temperature and humidity sensor is in °C, and the humidity signal is in %RH. The current signal collected by the grounding current sensor is in A. All analog signals are converted by an analog-to-digital converter (A / D) and then uploaded to the MCU via the system transmission layer using the existing transmission channels. These transmission channels include, but are not limited to, CAN bus, 4G, and fiber optic. The temperature and humidity sensor has a measurement range of -40℃ to 125℃ and 0%RH to 100%RH, with accuracies of ±0.2℃ and ±2%RH, respectively.

[0037] In other embodiments, pulse signals of partial discharge in the cable can be acquired and filtered and amplified.

[0038] For example, an HFCT is installed on the grounding wire of the cable under test to collect partial discharge pulse signals generated during the cable insulation degradation process via electromagnetic coupling. The HFCT has a measurement frequency band of 1MHz to 100MHz and a monitoring sensitivity of less than or equal to 2pC, which can effectively capture high-frequency pulse signals generated by partial discharge in the cable. The acquired pulse signals are first filtered by a hardware filtering circuit to remove power frequency and low-frequency interference signals, and then amplified by an amplification circuit to meet the accuracy requirements of subsequent signal analysis.

[0039] Specifically, the filtered and amplified signal is transmitted to the corresponding AD conversion channel. After the analog signal is converted to a digital signal, it is uploaded to the MCU through the transmission layer.

[0040] Furthermore, the discharge amplitude and discharge frequency are obtained from the processed pulse signal.

[0041] For example, the MCU extracts features from the converted digital pulse signal through a preset partial discharge signal parsing logic, identifies valid partial discharge pulses, counts the number of pulses per unit time to obtain the discharge frequency, and calculates the peak value of the pulse signal to obtain the discharge amplitude.

[0042] Specifically, the unit of discharge amplitude is pC, and the unit of discharge frequency is times / minute. The partial discharge parameters obtained by analysis, together with the synchronously collected grounding current, temperature, and humidity parameters, constitute multi-dimensional insulation status data.

[0043] Thus, by adding synchronous acquisition of temperature, humidity, and partial discharge parameters to the existing leaky cable monitoring system, this invention provides a complete data foundation for a comprehensive assessment of cable insulation status. Furthermore, it reuses the transmission channels and core hardware of the original system, resulting in low modification costs and strong adaptability.

[0044] S102. Display the grounding current or partial discharge parameters, and display the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters.

[0045] Optionally, the present invention may also provide a monitoring type selection operation.

[0046] It should be noted that the monitoring type selection operation is implemented by adding a monitoring type drop-down selection box before the real-time waveform module on the system's real-time monitoring page, which corresponds to the present invention. Figure 2 , Figure 3 The image shows a schematic diagram of the real-time monitoring page.

[0047] The monitoring type selection operation includes at least a first monitoring mode and a second monitoring mode. The first monitoring mode is the grounding current monitoring mode, which is the default monitoring mode of the original leaky cable monitoring system; the second monitoring mode is the partial discharge monitoring mode, which is a new monitoring mode added in this invention. The two modes can be switched by maintenance personnel with one click.

[0048] In one alternative implementation, in response to the selection of a first monitoring mode, a waveform of the grounding current can be displayed, along with temperature and humidity displayed on the same screen.

[0049] For example, when the user selects the ground current monitoring mode, the system enters the following state: Figure 2 The real-time monitoring page shown (grounding current monitoring mode) displays a real-time waveform of the grounding current in the core area of ​​the page. The vertical axis of the waveform represents the current value, and the horizontal axis represents the time. The real-time value of the grounding current is also displayed below the waveform.

[0050] Specifically, on the same side of the grounding current waveform diagram, the real-time temperature and humidity values ​​for the corresponding deployment location are displayed simultaneously. The display format is: Temperature: XX℃; Humidity: XX%RH. The temperature and humidity data are displayed on the same screen as the grounding current data, and the refresh rate is consistent. The right side of the page simultaneously displays a real-time warning area, including sensor device ID, sensor channel number, real-time monitoring value, warning value, warning content, and warning time. Keyword filtering search is supported.

[0051] In another alternative implementation, in response to the selection of a second monitoring mode, waveforms related to partial discharge parameters can be displayed, along with temperature and humidity displayed on the same screen.

[0052] For example, when the user selects the partial discharge monitoring mode, the system enters the following state: Figure 3 The real-time monitoring page shown (partial discharge monitoring mode) switches the core area of ​​the page to waveforms related to partial discharge parameters, while retaining the monitoring type drop-down selection box and the real-time warning area. Temperature and humidity values ​​are still displayed synchronously in the same area.

[0053] Specifically, in the partial discharge monitoring mode, the display format and refresh frequency of temperature and humidity data are completely consistent with those in the grounding current monitoring mode, enabling full-screen display of temperature and humidity data in both monitoring modes. Maintenance personnel can intuitively analyze the impact of ambient temperature and humidity on the partial discharge status of cables.

[0054] Thus, by setting up a dual monitoring mode that can be switched with one click, the present invention enables the simultaneous display of temperature and humidity data in both modes. Maintenance personnel can view multi-parameter linkage data without switching pages, making the operation convenient, the data correlation strong, and greatly improving the fault analysis efficiency of maintenance personnel.

[0055] In this embodiment of the invention, the waveform diagrams related to the partial discharge parameters include: a first waveform diagram representing the trend of discharge amplitude changing over time, and a second waveform diagram representing the trend of discharge frequency changing over time.

[0056] For example, the first waveform diagram refers to a real-time waveform diagram with time as the horizontal axis and discharge amplitude as the vertical axis, which can intuitively display the real-time changing trend of the partial discharge amplitude of the cable and help maintenance personnel identify abnormal fluctuations in discharge intensity.

[0057] For example, the second waveform diagram refers to a real-time waveform diagram with time as the horizontal axis and discharge frequency as the vertical axis. It can intuitively show the changing trend of the number of partial discharges in the cable per unit time, helping maintenance personnel to judge the development speed of insulation degradation.

[0058] Specifically, the first and second waveforms are arranged independently vertically on the page, and the time axes of the two waveforms are completely synchronized. The refresh frequency of both waveforms is on the order of seconds, which is consistent with the refresh frequency of temperature, humidity and grounding current data, ensuring the time synchronization of multi-parameter data.

[0059] Thus, this invention uses two independent waveform diagrams to display the amplitude and frequency variation trends of partial discharge, enabling a direct judgment of the development pattern of partial discharge and timely detection of early signs of cable insulation deterioration, thereby significantly improving the practicality and accuracy of partial discharge monitoring.

[0060] S103. Compare the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective warning thresholds. When any parameter exceeds the corresponding warning threshold, generate a warning message.

[0061] It should be noted that, based on the grounding current and equipment fault disconnection early warning of the original leaky cable monitoring system, this invention adds four new early warning indicators: excessive temperature, excessive humidity, excessive partial discharge amplitude, and excessive partial discharge frequency. The early warning rules follow the threshold comparison logic of the original system to ensure compatibility with the original system. Figure 4 The diagram shows a multi-parameter warning area.

[0062] In one alternative implementation, the temperature can be compared with a temperature warning threshold; if the threshold is exceeded, a temperature over-limit warning message is generated.

[0063] In this embodiment of the invention, the temperature warning threshold can be a manually set value, which can be flexibly adjusted according to the actual scenario.

[0064] For example, for cables laid in tunnels, where the ambient temperature is relatively stable but heat dissipation is poor, the maximum temperature threshold can be set to 60℃ and the minimum temperature threshold can be set to -10℃; for cables laid in the open air, where the temperature difference between day and night is large, the maximum temperature threshold can be set to 50℃ and the minimum temperature threshold can be set to -20℃.

[0065] For example, the multi-parameter early warning module compares the real-time collected temperature value with the temperature threshold range consisting of the preset upper temperature threshold and the lower temperature threshold. If the temperature value is higher than the upper threshold or lower than the lower threshold, it is immediately determined that the temperature exceeds the limit and the corresponding temperature exceedance early warning information is generated.

[0066] Specifically, the generated temperature over-limit warning information includes the sensor device ID, sensor channel number, real-time temperature monitoring value, corresponding temperature warning threshold, warning content, and warning time. The warning information is simultaneously pushed to the real-time warning area of ​​the real-time monitoring page for display, and at the same time, the page's warning prompt is triggered.

[0067] In another alternative implementation, the humidity can be compared with a humidity warning threshold, and if it exceeds the threshold, a humidity over-limit warning message can be generated.

[0068] In this embodiment of the invention, the humidity warning threshold can be a manually set value, which can be flexibly adjusted according to the actual scenario.

[0069] For example, for cables laid in tunnels, due to the humid environment, the maximum humidity threshold can be set to 95%RH and the minimum humidity threshold to 30%RH; for cables laid in outdoor cable trenches, the maximum humidity threshold can be set to 85%RH and the minimum humidity threshold to 20%RH; for cables laid in indoor substations, the maximum humidity threshold can be set to 80%RH and the minimum humidity threshold to 15%RH.

[0070] For example, the multi-parameter early warning module compares the real-time collected humidity value with the preset humidity upper limit threshold and humidity lower limit threshold range. If the humidity value is higher than the upper limit threshold or lower than the lower limit threshold, it is immediately determined that the humidity exceeds the limit and the corresponding humidity exceedance early warning information is generated.

[0071] Specifically, the field format of humidity exceeding the limit warning information is completely consistent with that of temperature exceeding the limit warning information. It is displayed in reverse chronological order in the real-time warning area along with other types of warning information, and users can filter and view it by warning type.

[0072] In another alternative implementation, the discharge amplitude can be compared with the amplitude warning threshold. If the amplitude exceeds the threshold, an amplitude over-limit warning message is generated.

[0073] In this embodiment of the invention, the amplitude warning threshold can be a manually set value, which can be flexibly adjusted according to the cable's insulation class, service life, and historical monitoring data.

[0074] For example, for newly commissioned cables, the maximum discharge amplitude threshold can be set to 50pC and the minimum discharge amplitude threshold can be set to 0pC (i.e., only monitoring whether the amplitude exceeds the upper limit); for cables with a long service life and potential insulation aging, the maximum discharge amplitude threshold can be set to 100pC and the minimum discharge amplitude threshold can be set to 0pC; for cable sections with more active partial discharge, the maximum discharge amplitude threshold can be set to 80pC to provide early warning of insulation degradation trends.

[0075] For example, the multi-parameter early warning module will compare the real-time parsed discharge amplitude value with the amplitude threshold range consisting of the preset upper limit threshold and lower limit threshold of discharge amplitude. If the discharge amplitude value is higher than the upper limit threshold or lower than the lower limit threshold, it will be immediately determined as amplitude exceeding the limit and corresponding amplitude exceeding the limit early warning information will be generated.

[0076] Specifically, the amplitude over-limit warning information synchronously records the corresponding HFCT device number and installation location. Maintenance personnel can directly locate the abnormal cable location through the warning information, which greatly improves the efficiency of fault diagnosis.

[0077] In another alternative implementation, the discharge frequency can be compared with a frequency warning threshold. If the threshold is exceeded, a frequency over-limit warning message is generated.

[0078] In this embodiment of the invention, the frequency warning threshold can be a value set manually, which can be flexibly adjusted according to the cable's operating status, environmental conditions, and historical discharge frequency trends.

[0079] For example, for cables operating under normal conditions, the maximum discharge frequency threshold can be set to 10 times / minute; for cables operating in humid environments, since humidity may cause an increase in the frequency of partial discharge, the maximum discharge frequency threshold can be set to 20 times / minute; for cables that have shown early signs of insulation degradation, the maximum discharge frequency threshold can be set to 5 times / minute in order to detect abnormal upward trends in the discharge frequency in a timely manner.

[0080] For example, the multi-parameter early warning module compares the real-time statistical discharge frequency value with the frequency threshold range consisting of the preset upper limit threshold and lower limit threshold of discharge frequency. If the discharge frequency value is higher than the upper limit threshold or lower than the lower limit threshold, it is immediately determined that the frequency exceeds the limit and the corresponding frequency exceeds the limit early warning information is generated.

[0081] Specifically, the frequency over-limit warning information and the amplitude over-limit warning information are stored together. Maintenance personnel can view the intensity and frequency of abnormal discharges at the same time through the warning information to comprehensively assess the severity of cable insulation deterioration.

[0082] Thus, by adding four core early warning indicators, this invention can comprehensively cover various abnormal signs in the process of cable insulation deterioration, significantly reducing the probability of missed or misjudged faults, realizing early warning of cable insulation faults, and preventing the fault from expanding and affecting the safe operation of the railway traction power supply system.

[0083] Optionally, the present invention can also update the warning threshold in response to the user's configuration operation.

[0084] For example, the parameter settings page provides custom threshold configuration items for each monitoring parameter, corresponding to the present invention. Figure 5 The parameter setting page configuration item diagram shown allows maintenance personnel to manually input and save the threshold values ​​of each parameter according to the cable laying environment, model and specifications. After receiving the saved threshold values, the system will synchronously update them to the multi-parameter early warning module, replacing the original early warning thresholds.

[0085] The custom threshold configuration items provided on the parameter settings page are shown in Table 1 below: Table 1 Configuration items Configuration type unit highest temperature Upper limit threshold ℃ minimum temperature Lower threshold ℃ highest humidity Upper limit threshold %RH Minimum humidity Lower threshold %RH Maximum discharge amplitude Upper limit threshold pC Minimum discharge amplitude Lower threshold pC Maximum discharge frequency Upper limit threshold times / minute Minimum discharge frequency Lower threshold times / minute Specifically, maintenance personnel can configure independent early warning thresholds for sensors in different locations. For example, for cables laid in tunnels, a humidity threshold adapted to the high humidity environment of tunnels can be set, and for cables laid in the open air, a temperature threshold adapted to the temperature difference between day and night can be set to improve the on-site adaptability of the system.

[0086] Thus, by setting customizable multi-parameter threshold configuration items, this invention solves the problems of poor parameter configuration flexibility and inability to adapt to different field environments in the prior art. Maintenance personnel can flexibly adjust the warning standards according to the actual application scenario, which greatly improves the adaptability and practicality of the system.

[0087] In the optimized method of the leaky cable monitoring system provided by this invention, by synchronously collecting the grounding current, temperature, humidity, and partial discharge parameters of the cable, the single-parameter monitoring is expanded into a multi-dimensional monitoring system covering electrical parameters, environmental parameters, and insulation degradation characteristic parameters, breaking the information silos of existing technologies. By displaying temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, the linkage visualization of environmental factors and electrical status data is realized, providing an intuitive data basis for analyzing the impact of the environment on the insulation status. By comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, a warning message is generated when any parameter exceeds the threshold, upgrading the single leakage warning to a multi-parameter comprehensive warning, which can timely capture early signs of cable insulation degradation, thereby realizing multi-dimensional real-time monitoring of the insulation status of railway high-voltage cables, improving the comprehensiveness of monitoring and the timeliness of warning.

[0088] Optionally, after S101 above, the present invention can further process the grounding current, temperature, humidity, discharge amplitude and discharge frequency to generate multi-parameter monitoring data.

[0089] For example, after the MCU parses and calibrates the synchronously acquired raw data from multiple channels, it adds a unified timestamp to each set of data to generate a standardized multi-parameter monitoring dataset with a unified format and time synchronization, ensuring the time consistency of data such as grounding current, temperature, humidity, discharge amplitude, and discharge frequency.

[0090] Specifically, the generated multi-parameter monitoring data is synchronously transmitted to the real-time monitoring module, multi-parameter early warning module, monitoring information statistics module, and alarm log module of the application layer, providing a unified data foundation for the functional implementation of each module.

[0091] Furthermore, the display step of S102 above can specifically be: displaying the grounding current or partial discharge parameters in the multi-parameter monitoring data, and displaying the temperature and humidity in the multi-parameter monitoring data on the same screen as the displayed grounding current or partial discharge parameters.

[0092] For example, the real-time monitoring module extracts the data corresponding to the monitoring mode selected by the user from the standardized multi-parameter monitoring dataset, as well as the synchronized temperature and humidity data, and displays them on the same screen in a preset format to ensure that the time of the displayed data is completely synchronized.

[0093] Specifically, when a user switches monitoring modes, the real-time monitoring module directly extracts the corresponding data from the same multi-parameter monitoring dataset for display, without needing to re-initiate a data collection request, thus achieving seamless switching of monitoring modes without data delay or packet loss.

[0094] Furthermore, the comparison step in S103 above can be specifically as follows: comparing the grounding current, temperature, humidity, discharge amplitude and discharge frequency in the multi-parameter monitoring data with their respective early warning thresholds.

[0095] For example, the multi-parameter early warning module extracts the real-time values ​​of all monitoring parameters from the same standardized multi-parameter monitoring dataset and compares them synchronously with the corresponding updated early warning thresholds to ensure that the early warning judgments of all parameters are based on the data collected at the same time point, thus avoiding misjudgments of early warnings due to asynchronous data time.

[0096] Specifically, the multi-parameter early warning module can realize multi-parameter correlation early warning judgment based on multi-parameter data at the same time point. For example, when temperature and humidity data show abnormal fluctuations, accompanied by a slight increase in the amplitude and frequency of partial discharge, an early warning of insulation degradation can be generated, further improving the accuracy of the warning.

[0097] Thus, by generating a standardized multi-parameter monitoring dataset with a unified timestamp, this invention achieves time synchronization and data linkage of all monitoring parameters, ensuring the consistency of data across modules such as display, early warning, and statistics for multi-parameter correlation analysis and linked early warning, thereby further improving the stability and accuracy of the system.

[0098] Optionally, the present invention can also store the above-mentioned grounding current, temperature, humidity, discharge amplitude and discharge frequency, as well as early warning information, and perform classification, statistics and recording.

[0099] For example, standardized multi-parameter monitoring datasets and real-time early warning information can be synchronously stored in a database. The stored monitoring data can be statistically analyzed from multiple dimensions through a monitoring information statistics module, and the stored early warning information can be classified, recorded, and managed through an alarm log module.

[0100] Specifically, in the device status statistics area of ​​the system monitoring information page, new statistical items such as temperature, humidity, partial discharge amplitude, partial discharge frequency historical extreme values, real-time values, and alarm counts can be added. These items can be displayed on the same screen as the original equipment number, power supply section, installation location, maximum current, and other information. Multi-dimensional filtering by equipment, channel, and alarm type is also supported.

[0101] Specifically, four new log types can be added to the alarm content categories on the system alarm log page: temperature exceeding limits, humidity exceeding limits, amplitude exceeding limits, and discharge frequency exceeding limits. The core fields of the original logs are retained, including sensor name, device number, alarm time, alarm threshold, and channel. Filtering by alarm type, time, and device number is supported, and log data export is also supported.

[0102] Thus, through multi-dimensional statistical analysis and classified log recording, this invention realizes full lifecycle management of multi-parameter data collection, display, early warning, storage, and query, providing complete and traceable data support for the preventive maintenance of cables.

[0103] The following describes the optimized system of the leaky cable monitoring system provided by the present invention. The optimized system of the leaky cable monitoring system described below and the optimized method of the leaky cable monitoring system described above can be referred to in correspondence.

[0104] Figure 6 This is a structural diagram of an optimized system for a leaky cable monitoring system provided in an embodiment of the present invention. The optimized system includes: a sensing module 601, a display module 602, and an early warning module 603; the sensing module 601 is connected to the display module 602, and the early warning module 603 is connected to the sensing module 602.

[0105] Among them, the sensing module 601 is used to synchronously collect the grounding current, temperature, humidity and partial discharge parameters of the cable, wherein the partial discharge parameters include at least the discharge amplitude and discharge frequency.

[0106] In this embodiment of the invention, the sensing module 601 includes a grounding current sensor, a temperature and humidity sensor, and a partial discharge sensor. The grounding current sensor is used to collect cable-to-ground leakage current data. The temperature and humidity sensor is a patch-type sensor, deployed at key nodes in the cable laying process, including cable grounding points and cable joints, to collect temperature and humidity data of the cable laying environment. The partial discharge sensor uses a high-frequency current transformer, deployed at the cable grounding point, to collect the pulse signal of partial discharge in the cable, and after filtering and amplification, analyzes it to obtain the discharge amplitude and discharge frequency.

[0107] In addition, the data collected by the sensing module 601 is uploaded to the processing module through the system transmission layer. The transmission layer reuses the original leaky cable monitoring system's controller area network (CAN bus), 4th generation mobile communication technology (4G), or fiber optic channel.

[0108] The display module 602 is used to display grounding current or partial discharge parameters, and to display temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters.

[0109] In this embodiment of the invention, the display module 602 includes a mode switching unit, a first display unit, and a second display unit. The mode switching unit provides a monitoring type selection operation, which includes at least a first monitoring mode and a second monitoring mode. The first display unit displays a waveform of the grounding current in response to the selection of the first monitoring mode, and simultaneously displays temperature and humidity. The second display unit displays waveforms related to partial discharge parameters in response to the selection of the second monitoring mode, and simultaneously displays temperature and humidity. The waveforms related to the partial discharge parameters include a first waveform representing the trend of discharge amplitude over time, and a second waveform representing the trend of discharge frequency over time.

[0110] The early warning module 603 is used to compare the grounding current, temperature, humidity, discharge amplitude and discharge frequency with their respective early warning thresholds. When any parameter exceeds the corresponding early warning threshold, an early warning message is generated.

[0111] In this embodiment of the invention, the early warning module 603 includes a temperature early warning unit, a humidity early warning unit, an amplitude early warning unit, and a frequency early warning unit. The temperature early warning unit compares the temperature with a temperature early warning threshold; if the temperature exceeds the threshold, a temperature over-limit early warning message is generated. The humidity early warning unit compares the humidity with a humidity early warning threshold; if the humidity exceeds the threshold, a humidity over-limit early warning message is generated. The amplitude early warning unit compares the discharge amplitude with an amplitude early warning threshold; if the discharge amplitude exceeds the threshold, an amplitude over-limit early warning message is generated. The frequency early warning unit compares the discharge frequency with a frequency early warning threshold; if the frequency exceeds the threshold, a frequency over-limit early warning message is generated.

[0112] Furthermore, the optimized system of the leaky cable monitoring system provided in this embodiment of the invention also includes a processing module, a parameter configuration module, a storage module, and a statistical recording module. The processing module is connected to the sensing module, display module, and early warning module, respectively, and is used to process the grounding current, temperature, humidity, discharge amplitude, and discharge frequency collected by the sensing module to generate multi-parameter monitoring data, and output the multi-parameter monitoring data to the display module and early warning module. The parameter configuration module is connected to the early warning module and is used to update the early warning threshold in response to user configuration operations, and synchronize the updated early warning threshold to the early warning module. The storage module is connected to the sensing module and early warning module and is used to store grounding current, temperature, humidity, discharge amplitude, discharge frequency, and early warning information. The statistical recording module is connected to the storage module and is used to classify, statistically analyze, and record the stored data.

[0113] In the optimized system of the leaky cable monitoring system provided by this invention, by synchronously collecting the grounding current, temperature, humidity, and partial discharge parameters of the cable, the single-parameter monitoring is expanded into a multi-dimensional monitoring system covering electrical parameters, environmental parameters, and insulation degradation characteristic parameters, breaking the information silos of existing technologies. By displaying temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, the linkage and visualization of environmental factors and electrical status data are realized, providing an intuitive data foundation for analyzing the impact of the environment on the insulation status. By comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective warning thresholds, a warning message is generated when any parameter exceeds the threshold, upgrading the single leakage warning to a multi-parameter comprehensive warning, which can timely capture early signs of cable insulation degradation, thereby realizing multi-dimensional real-time monitoring of the insulation status of railway high-voltage cables, improving the comprehensiveness of monitoring and the timeliness of warning.

[0114] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include: a processor 710, a communications interface 720, a memory 730, and a communications bus 740, wherein the processor 710, the communications interface 720, and the memory 730 communicate with each other through the communications bus 740.

[0115] The processor 710 can call logic instructions in the memory 730 to execute an optimization method for the leaky cable monitoring system. The method includes: synchronously collecting grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; displaying the grounding current or partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, and generating a warning message when any parameter exceeds the corresponding warning threshold.

[0116] Furthermore, the logical instructions in the aforementioned memory 730 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0117] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the optimization method of the leaky cable monitoring system provided by the above methods. The method includes: synchronously collecting grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; displaying the grounding current or partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, and generating warning information when any parameter exceeds the corresponding warning threshold.

[0118] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements an optimization method for the leaky cable monitoring system provided by the above methods. The method includes: synchronously acquiring grounding current, temperature, humidity, and partial discharge parameters of the cable, wherein the partial discharge parameters include at least discharge amplitude and discharge frequency; displaying the grounding current or partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds, and generating warning information when any parameter exceeds the corresponding warning threshold.

[0119] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optimization method for a leaky cable monitoring system, characterized in that, The method includes: The grounding current, temperature, humidity, and partial discharge parameters of the cable are collected synchronously, wherein the partial discharge parameters include at least the discharge amplitude and the discharge frequency. The grounding current or the partial discharge parameters are displayed, and the temperature and humidity are displayed on the same screen as the grounding current or the partial discharge parameters. The grounding current, temperature, humidity, discharge amplitude, and discharge frequency are compared with their respective warning thresholds. When any parameter exceeds the corresponding warning threshold, a warning message is generated.

2. The method according to claim 1, characterized in that, The partial discharge parameters of the synchronously acquired cable include: Acquire the pulse signal of partial discharge in the cable; The pulse signal is filtered and amplified. The discharge amplitude and discharge frequency are obtained by parsing the processed pulse signal.

3. The method according to claim 1, characterized in that, The method of displaying the grounding current or the partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, includes: A monitoring type selection operation is provided, which includes at least a first monitoring mode and a second monitoring mode; In response to the selection of the first monitoring mode, the waveform of the grounding current is displayed, and the temperature and humidity are displayed on the same screen. In response to the selection of the second monitoring mode, a waveform graph related to the partial discharge parameters is displayed, and the temperature and humidity are displayed on the same screen.

4. The method according to claim 3, characterized in that, The waveforms related to the partial discharge parameters include: A first waveform diagram is used to represent the trend of the discharge amplitude changing over time, and a second waveform diagram is used to represent the trend of the discharge frequency changing over time.

5. The method according to claim 1, characterized in that, The method further includes: The warning threshold is updated in response to the user's configuration operation.

6. The method according to claim 1, characterized in that, The step involves comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective corresponding warning thresholds. When any parameter exceeds the corresponding warning threshold, a warning message is generated, including: The temperature is compared with the temperature warning threshold. If it exceeds the threshold, a temperature over-limit warning message is generated. The humidity is compared with the humidity warning threshold. If it exceeds the threshold, a humidity over-limit warning message is generated. The discharge amplitude is compared with the amplitude warning threshold. If it exceeds the threshold, an amplitude over-limit warning message is generated. The discharge frequency is compared with the frequency warning threshold. If the frequency exceeds the threshold, a frequency over-limit warning message is generated.

7. The method according to claim 1, characterized in that, The method further includes: The grounding current, temperature, humidity, discharge amplitude, and discharge frequency are processed to generate multi-parameter monitoring data; The method of displaying the grounding current or the partial discharge parameters, and displaying the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters, includes: Display the grounding current or the partial discharge parameter from the multi-parameter monitoring data; The temperature and humidity from the multi-parameter monitoring data are displayed on the same screen as the grounding current or the partial discharge parameters. The step of comparing the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective early warning thresholds includes: The grounding current, temperature, humidity, discharge amplitude, and discharge frequency in the multi-parameter monitoring data are compared with their respective early warning thresholds.

8. The method according to claim 1, characterized in that, The method further includes: The system stores the grounding current, temperature, humidity, discharge amplitude, discharge frequency, and early warning information, and performs classification, statistics, and recording.

9. An optimization system for a leaky cable monitoring system, characterized in that, include: The sensing module is used to synchronously collect the grounding current, temperature, humidity and partial discharge parameters of the cable, wherein the partial discharge parameters include at least the discharge amplitude and the discharge frequency. The display module, connected to the sensing module, is used to display the grounding current or the partial discharge parameters, and to display the temperature and humidity on the same screen as the displayed grounding current or partial discharge parameters; The early warning module, connected to the sensing module, is used to compare the grounding current, temperature, humidity, discharge amplitude, and discharge frequency with their respective early warning thresholds. When any parameter exceeds the corresponding early warning threshold, an early warning message is generated.

10. An electronic device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the method as described in any one of claims 1 to 8.

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