High-speed rail cable grounding system state monitoring device, method and equipment

Abstract

The invention discloses a high-speed rail cable grounding system state monitoring device, method and equipment, and belongs to the technical field of electric power facilities. The device comprises a data acquisition module used for acquiring voltage data and current data of a preset point location of a high-speed rail cable; the feature extraction module is used for performing feature extraction on the voltage data to obtain voltage change features and performing feature extraction on the current data to obtain current change features; and the fault analysis module is used for identifying whether the high-speed rail cable has a ground fault according to the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determining the type of the ground fault under the condition of identifying that the high-speed rail cable has the ground fault. According to the technical scheme, the voltage and current data of the high-speed rail cable are subjected to feature extraction, whether the grounding fault exists or not is recognized, the type of the grounding fault is determined, potential problems in a high-speed rail cable grounding system can be found timely and accurately, and therefore the stability and safety of high-speed rail power supply are guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of electric power facilities, and specifically relates to a device, method and equipment for monitoring the status of a high-speed railway cable grounding system. Background Art

[0002] The high-speed rail cable grounding system is a key facility to ensure the stability and safety of high-speed rail power transmission. During the operation of the high-speed rail, the high-speed rail cable grounding system properly grounds the metal sheath and other components of the high-speed rail cable to provide a release channel for the current. This not only helps to maintain the stability of the electrical performance of the high-speed rail cable, enabling it to transmit power efficiently, but also effectively reduces electromagnetic interference, avoids adverse effects on the high-speed rail communication and signal systems, and ensures the safety and smoothness of train operation.

[0003] However, many high-speed rail cables are exposed to harsh natural environments for a long time, such as humidity, high temperature, strong wind, etc., which will accelerate the aging and corrosion of the high-speed rail cable grounding system, resulting in an increase in grounding resistance; on the other hand, the continuous vibration generated by the operation of the train may gradually loosen the connection components of the high-speed rail cable grounding system. Once the high-speed rail cable grounding system is abnormal, the current in the metal sheath of the high-speed rail cable will increase, accelerating the aging of the high-speed rail cable insulation. In severe cases, it may cause a short circuit, resulting in a power outage on the high-speed rail, endangering the safety of train operation. Therefore, how to accurately monitor the status of the high-speed rail cable grounding system is an urgent problem that people in this field need to solve. Summary of the invention

[0004] The embodiments of the present application provide a high-speed railway cable grounding system status monitoring device, method and equipment, which aim to timely and accurately discover potential problems in the high-speed railway cable grounding system, thereby ensuring the stability and safety of the high-speed railway power supply.

[0005] In a first aspect, an embodiment of the present application provides a high-speed railway cable grounding system status monitoring device, the device comprising:

[0006] A data acquisition module is used to obtain voltage data and current data of preset points of the high-speed railway cable;

[0007] A feature extraction module, used to extract features from the voltage data to obtain voltage change features, and to extract features from the current data to obtain current change features;

[0008] A fault analysis module is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

[0009] In a second aspect, an embodiment of the present application provides a method for monitoring the state of a high-speed railway cable grounding system, the method comprising:

[0010] The voltage data and current data of the preset points of the high-speed railway cable are obtained through the data acquisition module;

[0011] Performing feature extraction on the voltage data to obtain voltage change features through a feature extraction module, and performing feature extraction on the current data to obtain current change features;

[0012] The fault analysis module identifies whether the high-speed railway cable has a ground fault based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determines the type of ground fault when it is identified that the high-speed railway cable has a ground fault.

[0013] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0014] In the embodiment of the present application, the data acquisition module is used to acquire the voltage data and current data of the preset points of the high-speed railway cable; the feature extraction module is used to extract the features of the voltage data to obtain the voltage change features, and to extract the features of the current data to obtain the current change features; the fault analysis module is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change features and the current change features, and to determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable. The above-mentioned high-speed railway cable grounding system status monitoring device can timely and accurately discover potential problems in the high-speed railway cable grounding system by extracting features from the voltage and current data of the high-speed railway cable to identify whether there is a ground fault and determine the type of ground fault, thereby ensuring the stability and safety of the high-speed railway power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a high-speed railway cable grounding system status monitoring device provided in Example 1 of the present application;

[0016] Figure 2 It is a structural schematic diagram of a high-speed railway cable grounding system status monitoring device provided in Example 2 of the present application;

[0017] Figure 3 It is a structural schematic diagram of a high-speed railway cable grounding system status monitoring device provided in Example 3 of the present application;

[0018] Figure 4 It is a flow chart of a method for monitoring the state of a high-speed railway cable grounding system provided in Embodiment 4 of the present application;

[0019] Figure 5 It is a schematic diagram of the structure of an electronic device provided in Example 5 of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the convenience of description, only the part related to the present application but not all the contents are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] In the following, in conjunction with the accompanying drawings, the high-speed railway cable grounding system status monitoring device, method and equipment provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0024] Embodiment 1

[0025] Figure 1 Schematic diagram of the structure of the high-speed railway cable grounding system status monitoring device provided in the first embodiment of the present application. Figure 1 As shown, the device comprises:

[0026] The data acquisition module 110 is used to acquire the voltage data and current data of the preset points of the high-speed railway cable;

[0027] A feature extraction module 120, configured to extract features from the voltage data to obtain voltage variation features, and to extract features from the current data to obtain current variation features;

[0028] The fault analysis module 130 is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

[0029] This application is applicable to scenarios where high-speed rail cables are installed. Specifically, the feature extraction of voltage data and current data, the identification of ground faults, and the determination of ground fault types can be performed by intelligent terminal devices, and the staff can take corresponding maintenance measures according to the determined ground fault type to improve the maintenance efficiency of high-speed rail cables with ground faults.

[0030] Based on the above usage scenarios, it can be understood that the executor of the present application can be a smart terminal device, such as a desktop computer, a laptop computer, a mobile phone, a tablet computer, and interactive multimedia, etc., and no excessive limitations are made here.

[0031] The data acquisition module 110 is used to acquire voltage data and current data of preset points of the high-speed railway cable.

[0032] Cable is a device used to transmit power or signals. High-speed rail cables can refer to cables used in high-speed rail power transmission systems, which are responsible for transmitting power for high-speed rail trains, station equipment and related facilities along the line. Preset points can be specific monitoring locations on pre-set high-speed rail cables.

[0033] Voltage data can be a physical quantity that measures the energy difference generated by the different potentials of a unit charge in an electrostatic field. Voltage data can be collected by a voltage transformer. Current data can refer to the amount of charge passing through the conductor cross section per unit time. Current data can be collected by a current transformer.

[0034] In this technical solution, optionally, the data acquisition module is specifically used to:

[0035] The voltage and current data of the power supply end, the load end and the preset intermediate points of the high-speed railway cable are obtained; wherein the preset intermediate points include equally spaced points, segmented points and environmental change points.

[0036] The power supply end can be the starting point where the high-speed railway cable obtains power input and is connected to the power supply system, such as a substation or traction substation.

[0037] The load end may refer to the end where the high-speed railway cable outputs electrical energy and is connected to electrical equipment, that is, the location of loads such as high-speed railway trains, station lighting, and communication signal equipment.

[0038] The preset intermediate point can be a pre-set intermediate specific monitoring position on the high-speed railway cable except the power supply end and the load end. The preset intermediate point can include equally spaced points, segmented points and environmental change points. Specifically, equally spaced points can be monitoring positions pre-set on the high-speed railway cable at fixed intervals; segmented points can be monitoring positions pre-set at the boundaries of sections by dividing the high-speed railway cable into different sections based on the structural characteristics, laying methods or functional areas of the high-speed railway cable; environmental change points can be monitoring positions pre-set at locations where the environment around the high-speed railway cable changes significantly.

[0039] The advantage of this arrangement of the scheme is that by obtaining the voltage and current data at the power supply end, load end, equally spaced points, segmented points and environmental change points of the high-speed rail cable, the operating conditions of the high-speed rail cable in different locations, different environments and different structural sections can be fully and meticulously understood, thereby providing accurate and rich data support for the identification of whether there is a grounding fault in the high-speed rail cable.

[0040] The feature extraction module 120 is used to extract features from the voltage data to obtain voltage change features, and to extract features from the current data to obtain current change features.

[0041] Feature extraction is the process of extracting the most representative information that best reflects the essential characteristics of the data from the original data. It can be understood that the voltage change feature can be the information extracted from the voltage data that can characterize the voltage change law and characteristics; the current change feature can be the information extracted from the current data that can characterize the current change law and characteristics.

[0042] The method of extracting the characteristics of voltage data to obtain voltage change characteristics can be adopted to determine the voltage time series of each preset point according to the voltage data, and determine the voltage change trend characteristics and voltage change speed characteristics of each preset point according to the voltage time series of each preset point and the preset sliding window size. The method of extracting the characteristics of current data to obtain current change characteristics can be adopted to determine the current time series of each preset point according to the current data, and determine the current change trend characteristics and current change speed characteristics of each preset point according to the current time series of each preset point and the preset sliding window size.

[0043] The fault analysis module 130 is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

[0044] A ground fault may refer to an electrical connection that should not exist between the conductor of a high-speed railway cable or a metal part (such as a metal sheath) connected to the conductor and the earth, causing abnormal current to flow into the earth. The method of identifying whether a high-speed railway cable has a ground fault based on voltage data, current data, voltage change characteristics, and current change characteristics can be used to identify that a high-speed railway cable has a ground fault when the voltage change trend characteristics at the power supply end are the same as the current change trend characteristics, and when the voltage change trend characteristics at a preset point are decreasing and the current change trend characteristics are increasing.

[0045] The ground fault type may be a classification result obtained by classifying the ground fault according to its manifestation and formation cause. The ground fault type may be determined by voltage data, current data, voltage change speed characteristics, and current change speed characteristics of a preset point where the ground fault exists.

[0046] In the present application example, the data acquisition module is used to acquire the voltage data and current data of the preset points of the high-speed rail cable; the feature extraction module is used to extract the features of the voltage data to obtain the voltage change features, and to extract the features of the current data to obtain the current change features; the fault analysis module is used to identify whether there is a ground fault in the high-speed rail cable based on the voltage data, the current data, the voltage change features and the current change features, and to determine the type of ground fault when it is identified that there is a ground fault in the high-speed rail cable. This technical solution can timely and accurately discover potential problems in the high-speed rail cable grounding system by extracting features from the voltage and current data of the high-speed rail cable to identify whether there is a ground fault and determine the type of ground fault, thereby ensuring the stability and safety of the high-speed rail power supply.

[0047] Embodiment 2

[0048] Figure 2It is a structural diagram of the high-speed railway cable grounding system status monitoring device provided in Example 2 of the present application. This solution has made better improvements on the basis of the above-mentioned embodiments, and the specific improvements are as follows: the feature extraction module is specifically used to: determine the voltage time series of each preset point according to the voltage data, and determine the voltage change trend characteristics and voltage change speed characteristics of each preset point according to the voltage time series of each preset point and the preset sliding window size; determine the current time series of each preset point according to the current data, and determine the current change trend characteristics and current change speed characteristics of each preset point according to the current time series of each preset point and the preset sliding window size.

[0049] like Figure 2 As shown, the device comprises:

[0050] The data acquisition module 210 is used to acquire the voltage data and current data of the preset points of the high-speed railway cable;

[0051] A feature extraction module 220, configured to extract features from the voltage data to obtain voltage variation features, and to extract features from the current data to obtain current variation features;

[0052] The fault analysis module 230 is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

[0053] The data acquisition module 210 is specifically used for:

[0054] The voltage and current data of the power supply end, the load end and the preset intermediate points of the high-speed railway cable are obtained; wherein the preset intermediate points include equally spaced points, segmented points and environmental change points.

[0055] The feature extraction module 220 is specifically used for:

[0056] Determine the voltage time series of each preset point according to the voltage data, and determine the voltage change trend characteristics and voltage change speed characteristics of each preset point according to the voltage time series of each preset point and a preset sliding window size;

[0057] The current time series of each preset point is determined according to the current data, and the current change trend characteristics and current change speed characteristics of each preset point are determined according to the current time series of each preset point and the preset sliding window size.

[0058] The voltage time series of a preset point may be a set of voltage data of the preset point arranged in time sequence. The voltage time series of the preset point may be obtained by storing the voltage data of the preset point in association with each other according to time.

[0059] The window is like a "sliding box" in the sequence, which moves one step each time and covers a certain amount of data. The step size can be preset, that is, the preset sliding window size. For example, if the preset sliding window size is 10, the window will simultaneously contain 10 consecutive voltage data in the voltage time series. In this solution, the preset sliding window size can be longer than the working condition switching time of the high-speed train.

[0060] The voltage change trend feature can be used to describe the changing trend of whether the voltage data is decreasing, increasing or remaining the same. The voltage change speed feature can be an indicator to measure how fast the voltage data changes in a unit time. The voltage change trend feature and the voltage change speed feature of each preset point can be determined according to the voltage time series of each preset point and the preset sliding window size. The average value of the voltage data in the current window and the average value of the voltage data in the window before the last sliding of the window can be calculated according to the preset sliding window size, and the difference between the two average values ​​can be calculated, and the voltage change trend feature and the voltage change speed feature can be determined according to the difference.

[0061] The following is a sample code for determining the voltage change trend characteristics and voltage change speed characteristics:

[0062] def calculate_voltage_features(voltage_time_series,window_size):

[0063] features = []

[0064] for iin range(len(voltage_time_series)-window_size+1):

[0065] current_window=voltage_time_series[i:i+window_size]

[0066] prev_window=voltage_time_series[i-1:i+window_size-1]if i>0else None

[0067] if prev_window is not None:

[0068] current_avg=sum(current_window) / window_size

[0069] prev_avg=sum(prev_window) / window_size

[0070] diff = current_avg - prev_avg

[0071] #Determine the voltage change trend characteristics

[0072] if diff>0:

[0073] trend="increase"

[0074] elif diff<0:

[0075] trend="decrease"

[0076] else:

[0077] trend="same"

[0078] #Assume that the time interval between each data point is 1, the speed calculated here is based on the speed of change of the window average voltage

[0079] speed=diff

[0080] features.append((trend,speed))

[0081] return features

[0082] #Sample data, assuming this is a voltage time series at a preset point

[0083] voltage_time_series_example=[100,102,105,103,104,106,108,107,106,105,104,103]

[0084] window_size_example=5

[0085] result=calculate_voltage_features(voltage_time_series_example,window_size_example)for trend,speed in result:

[0086] print(f"voltage change trend: {trend}, voltage change speed: {speed}")

[0087] The current time series of a preset point may be a set of current data of the preset point arranged in time sequence. The current time series of the preset point may be obtained by storing the current data of a preset point in association with each other according to time.

[0088] The current change trend feature can be used to describe the change trend of whether the current data is decreasing, increasing or remaining the same. The current change speed feature can be an indicator to measure how fast the current data changes in a unit time. According to the current time series of each preset point and the preset sliding window size, the current change trend feature and the current change speed feature of each preset point are determined. The average value of the current data in the current window and the average value of the current data in the window before the window last slid can be calculated according to the preset sliding window size, and the difference between the two average values ​​is calculated, and the current change trend feature and the current change speed feature are determined according to the difference.

[0089] In this technical solution, optionally, the fault analysis module includes:

[0090] A fault identification unit, configured to identify that a ground fault exists in the high-speed railway cable when the voltage change trend characteristic and the current change trend characteristic at the power supply end are equal, and when the voltage change trend characteristic at a preset point is decreasing and the current change trend characteristic is increasing;

[0091] A fault type determination unit is used to determine the type of grounding fault based on the voltage data, the current data, the voltage change speed characteristics and the current change speed characteristics of the preset point when it is identified that the high-speed railway cable has a grounding fault.

[0092] The voltage change trend characteristics at the power supply end are the same as the current change trend characteristics, indicating that the power supply situation at the power supply end is stable. Under normal operating conditions, there are no obvious power supply anomalies or load mutations. The output power quality is relatively stable and can continue to provide reliable power support for the high-speed rail cable. There is a preset point where the voltage change trend characteristics are decreasing and the current change trend characteristics are increasing, indicating that there is a grounding fault near the preset point, which may cause an additional current leakage path at the preset point, resulting in an abnormal increase in local current. This abnormal change in current affects the voltage distribution, causing the voltage at the preset point to decrease. Therefore, it can be identified that there is a grounding fault in the high-speed rail cable.

[0093] The method for determining the type of grounding fault based on the voltage data, current data, voltage change speed characteristics and current change speed characteristics of the preset points can be adopted. When the voltage data of the preset points is lower than the preset voltage threshold, the current data exceeds the preset current threshold, and the voltage change speed characteristics and the current change speed characteristics exceed the preset speed threshold, the data abnormality duration of the preset points is counted, and when the data abnormality duration exceeds the preset duration, the grounding fault type is determined as an insulation damage grounding fault, or the grounding fault type is determined as an insulation aging grounding fault.

[0094] In the technical solution, optionally, the fault type determination unit is specifically used to:

[0095] When the voltage data at the preset point is lower than the preset voltage threshold, the current data exceeds the preset current threshold, and the voltage change speed characteristic and the current change speed characteristic exceed the preset speed threshold, counting the abnormal duration of the data at the preset point, and when the abnormal duration of the data exceeds the preset duration, determining the ground fault type as an insulation damage ground fault;

[0096] or,

[0097] The ground fault type was determined to be an insulation aging ground fault.

[0098] The preset voltage threshold may be a preset upper limit of voltage data indicating a significant decrease in voltage data, the preset current threshold may be a preset lower limit of current data indicating a significant increase in current data, and the preset speed threshold may be a preset lower limit of change speed indicating that voltage / current data changes too quickly. If the voltage data at the preset point is lower than the preset voltage threshold, the current data exceeds the preset current threshold, and the voltage change speed characteristics and the current change speed characteristics exceed the preset speed threshold, it indicates that the operation state of the high-speed railway cable at the preset point has been significantly abnormal, and this fault is showing a trend of rapid development.

[0099] The data abnormality duration of the preset point may refer to the duration during which the voltage data of the preset point is lower than the preset voltage threshold and the current data exceeds the preset current threshold. The preset duration may be a preset lower limit of the data abnormality duration for determining whether the abnormality can be recovered autonomously.

[0100] An insulation damage grounding fault may refer to a situation where the insulation layer of a high-speed railway cable is severely damaged in an instant or in a short period of time due to sudden and strong external factors, resulting in a serious loss of insulation performance, forming a low-resistance path between the cable conductor and the earth, causing abnormal current flow to the earth. When the voltage data at a preset point is lower than the preset voltage threshold, the current data exceeds the preset current threshold, the voltage change speed characteristics and the current change speed characteristics exceed the preset speed threshold, and the abnormal duration of the data at the preset point exceeds the preset duration, it means that the insulation of the high-speed railway cable has been severely damaged in a short period of time, causing the current to increase abnormally and seek additional paths (grounding), thereby causing the voltage to drop rapidly. This rapid and large-scale change in electrical parameters, as well as the continuous abnormal duration, are consistent with the characteristics of insulation instantaneous failure caused by sudden external force impact, electrical breakdown, etc., so the grounding fault type can be determined as an insulation damage grounding fault.

[0101] Insulation aging grounding faults can be caused by the long-term operation of high-speed railway cables. Under the multiple effects of electricity, heat, mechanical stress and environmental factors, the performance of its insulation materials gradually deteriorates, and the insulation resistance gradually decreases, which eventually leads to the formation of a conductive path between the cable conductor and the earth, causing a grounding fault. The voltage change trend characteristic of the preset point is decreasing, but its voltage data is not lower than the preset voltage threshold, the current change trend characteristic of the preset point is increasing, but its current data does not exceed the preset voltage threshold, and the voltage change speed characteristic and current change speed characteristic of the preset point do not exceed the preset speed threshold, indicating that the insulation performance of the high-speed railway cable is in the process of slow deterioration. Insulation aging is a gradual process. At this stage, the insulation performance gradually decreases, but it has not yet reached the level of causing a sharp change in voltage, current and its change speed and breaking through the threshold. Therefore, the grounding fault type can be determined as an insulation aging grounding fault.

[0102] The benefit of this arrangement of the present scheme is that when the voltage data at a preset point is lower than a preset voltage threshold, the current data exceeds a preset current threshold, the voltage change speed characteristics and the current change speed characteristics exceed the preset speed threshold, and the abnormal duration of the data at the preset point exceeds a preset duration, the type of ground fault is determined as an insulation damage ground fault; otherwise, the type of ground fault is determined as an insulation aging ground fault. This can help staff take corresponding maintenance measures based on the determined type of ground fault, improve maintenance efficiency, and thus ensure the normal operation of the high-speed rail cable.

[0103] The advantage of this arrangement of the present scheme is that by identifying the presence of a grounding fault in the high-speed rail cable when the voltage change trend characteristics at the power supply end are equal to the current change trend characteristics, and when there is a preset point where the voltage change trend characteristics are decreasing and the current change trend characteristics are increasing, the interference caused by factors such as power supply end fluctuations or overall load changes can be effectively eliminated, and the abnormal signal of the high-speed rail cable grounding fault can be captured in a timely and accurate manner.

[0104] The advantage of this setting of the present scheme is that by determining the voltage / current time series of each preset point based on the voltage / current data, and determining the voltage / current change trend characteristics and the voltage / current change speed characteristics of each preset point based on the voltage / current time series of each preset point and the preset sliding window size, the slight fluctuations and abnormal changes in voltage and current can be captured in time. The preset sliding window size is longer than the switching time of the high-speed train operating condition, which enables the window to fully cover the data fluctuations during the operating condition switching process, avoiding misjudgment due to interference caused by the operating condition switching.

[0105] Embodiment 3

[0106] Figure 3 It is a structural diagram of the high-speed railway cable grounding system status monitoring device provided in Example 3 of the present application. This solution has made better improvements on the basis of the above-mentioned embodiments, and the specific improvements are: the fault analysis module also includes: a fault location determination unit, which is used to determine the grounding fault location of the high-speed railway cable according to the preset point position when it is identified that the high-speed railway cable has a grounding fault.

[0107] like Figure 3 As shown, the device comprises:

[0108] The data acquisition module 310 is used to acquire the voltage data and current data of the preset points of the high-speed railway cable;

[0109] A feature extraction module 320, configured to extract features from the voltage data to obtain voltage variation features, and to extract features from the current data to obtain current variation features;

[0110] The fault analysis module 330 is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

[0111] The data acquisition module 310 is specifically used for:

[0112] The voltage and current data of the power supply end, the load end and the preset intermediate points of the high-speed railway cable are obtained; wherein the preset intermediate points include equally spaced points, segmented points and environmental change points.

[0113] The feature extraction module 320 is specifically used for:

[0114] Determine the voltage time series of each preset point according to the voltage data, and determine the voltage change trend characteristics and voltage change speed characteristics of each preset point according to the voltage time series of each preset point and a preset sliding window size;

[0115] The current time series of each preset point is determined according to the current data, and the current change trend characteristics and current change speed characteristics of each preset point are determined according to the current time series of each preset point and the preset sliding window size.

[0116] Wherein, the fault analysis module 330 includes:

[0117] A fault identification unit 3301 is used to identify that there is a grounding fault in the high-speed railway cable when the voltage change trend characteristic and the current change trend characteristic at the power supply end are the same, and the voltage change trend characteristic at a preset point is decreasing and the current change trend characteristic is increasing;

[0118] A fault type determination unit 3302 is used to determine the type of ground fault according to the voltage data, the current data, the voltage change speed characteristics and the current change speed characteristics of the preset point when it is identified that the high-speed railway cable has a ground fault;

[0119] The fault location determination unit 3303 is used to determine the grounding fault location of the high-speed railway cable according to the preset point when it is identified that the high-speed railway cable has a grounding fault.

[0120] The ground fault location may refer to a specific location on a high-speed railway cable where abnormal current flows into the earth. The method of determining the ground fault location of a high-speed railway cable according to a preset point may include obtaining zero-sequence current data of a preset point and two adjacent preset points, obtaining the interval distance between the preset point and the two adjacent preset points, and determining the ground fault location of the high-speed railway cable according to the zero-sequence current data and the interval distance.

[0121] In the technical solution, optionally, the fault location determination unit is specifically used to:

[0122] Acquiring zero-sequence current data of the preset point and two adjacent preset points;

[0123] Obtaining the interval distance between the preset point and two adjacent preset points;

[0124] The grounding fault position of the high-speed railway cable is determined according to the zero-sequence current data and the spacing distance.

[0125] Zero-sequence current data may refer to the current phasor and the current when it is not zero. Zero-sequence current data may be acquired through a zero-sequence current transformer.

[0126] The interval distance between a preset point and two adjacent preset points may refer to the length of a high-speed rail cable between the preset point and the two adjacent preset points. The interval distance between a preset point and two adjacent preset points may be obtained by referring to a high-speed rail cable laying drawing, an engineering design document, or a line layout manual or other description documents.

[0127] According to the zero-sequence current data and the spacing distance, the method for determining the grounding fault position of the high-speed railway cable can be adopted by setting the zero-sequence current data of the previous adjacent preset point of the preset point as the first zero-sequence current, setting the zero-sequence current data of the preset point as the second zero-sequence current, setting the zero-sequence current data of the next adjacent preset point of the preset point as the third zero-sequence current, setting the spacing distance between the preset point and the previous adjacent preset point as the first spacing distance, setting the spacing distance between the preset point and the next adjacent preset point as the second spacing distance, calculating the second zero-sequence current and the first zero-sequence current. The difference between the zero-sequence currents is taken as the first difference, and the difference between the third zero-sequence current and the second zero-sequence current is calculated as the second difference. If the first difference is greater than or equal to the second difference, the first zero-sequence current, the first spacing distance and the preset multiple are multiplied, and the multiplication result is divided by the first difference to obtain the spacing distance between the ground fault position and the previous adjacent preset point. Conversely, if the first difference is less than the second difference, the second zero-sequence current, the second spacing distance and the preset multiple are multiplied, and the multiplication result is divided by the second difference to obtain the spacing distance between the ground fault position and the preset point.

[0128] Here is a sample code for locating a ground fault in a high-speed rail cable:

[0129]

[0130] fault_location_distance=calculate_fault_location(first_zerosequence_current, second_zerosequence_current,

[0131] third_zerosequence_current,first_distance,second_distance,preset_multiplier)print(f"The distance between the ground fault location and the corresponding point is: {fault_location_distance}")

[0132] The advantage of this setting of the present scheme is that by determining the grounding fault position of the high-speed railway cable based on the zero-sequence current data of the preset point and the two adjacent preset points, as well as the interval distance between the preset point and the two adjacent preset points, the grounding fault position can be located more accurately and efficiently, providing strong support for the rapid repair of the grounding fault.

[0133] The benefit of this scheme is that by determining the grounding fault location of the high-speed rail cable according to the preset point, it can help the staff to quickly arrive at the fault site according to the determined grounding fault location to carry out maintenance work, thereby greatly shortening the fault investigation time and improving the efficiency of fault maintenance.

[0134] Embodiment 4

[0135] Figure 4 Schematic diagram of the flow of the high-speed railway cable grounding system status monitoring method provided in the fourth embodiment of the present application. Figure 4 As shown, the specific steps include:

[0136] S401, obtaining voltage data and current data of preset points of the high-speed railway cable through a data acquisition module;

[0137] S402, extracting features from the voltage data to obtain voltage change features through a feature extraction module, and extracting features from the current data to obtain current change features;

[0138] S403. Identify whether the high-speed railway cable has a ground fault according to the voltage data, the current data, the voltage change characteristics and the current change characteristics through a fault analysis module, and determine the type of ground fault when it is identified that the high-speed railway cable has a ground fault.

[0139] In an embodiment of the present application, the voltage data and current data of the preset points of the high-speed railway cable are acquired through a data acquisition module; the voltage data is feature extracted through a feature extraction module to obtain voltage change features, and the current data is feature extracted through a feature analysis module to obtain current change features; the fault analysis module identifies whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change features, and the current change features, and determines the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable. The above-mentioned high-speed railway cable grounding system status monitoring method can timely and accurately discover potential problems in the high-speed railway cable grounding system by extracting features from the voltage and current data of the high-speed railway cable to identify whether there is a ground fault and determine the type of ground fault, thereby ensuring the stability and safety of the high-speed railway power supply.

[0140] The high-speed railway cable grounding system status monitoring method provided in the embodiment of the present application corresponds to the high-speed railway cable grounding system status monitoring device provided in the above embodiment, has the same functional modules and beneficial effects, and will not be repeated here to avoid repetition.

[0141] Embodiment 5

[0142] like Figure 5 As shown, an embodiment of the present application also provides an electronic device 500, including a processor 501, a memory 502, and a program or instruction stored in the memory 502 and executable on the processor 501. When the program or instruction is executed by the processor 501, each process of the above-mentioned high-speed railway cable grounding system status monitoring device embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0143] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0144] Embodiment 6

[0145] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned high-speed railway cable grounding system status monitoring device embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0146] The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0147] Embodiment 7

[0148] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned high-speed railway cable grounding system status monitoring device embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0149] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0150] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0151] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0152] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0153] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A high-speed railway cable grounding system status monitoring device, characterized in that: The device comprises: A data acquisition module is used to obtain voltage data and current data of preset points of the high-speed railway cable; A feature extraction module, used to extract features from the voltage data to obtain voltage change features, and to extract features from the current data to obtain current change features; A fault analysis module is used to identify whether there is a ground fault in the high-speed railway cable based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determine the type of ground fault when it is identified that there is a ground fault in the high-speed railway cable.

2. The high-speed railway cable grounding system status monitoring device according to claim 1 is characterized in that: The data acquisition module is specifically used for: The voltage and current data of the power supply end, the load end and the preset intermediate points of the high-speed railway cable are obtained; wherein the preset intermediate points include equally spaced points, segmented points and environmental change points.

3. The high-speed railway cable grounding system status monitoring device according to claim 2 is characterized in that: The feature extraction module is specifically used for: Determine the voltage time series of each preset point according to the voltage data, and determine the voltage change trend characteristics and voltage change speed characteristics of each preset point according to the voltage time series of each preset point and a preset sliding window size; The current time series of each preset point is determined according to the current data, and the current change trend characteristics and current change speed characteristics of each preset point are determined according to the current time series of each preset point and the preset sliding window size.

4. The high-speed railway cable grounding system status monitoring device according to claim 3 is characterized in that: The fault analysis module comprises: A fault identification unit, configured to identify that a ground fault exists in the high-speed railway cable when the voltage change trend characteristic and the current change trend characteristic at the power supply end are equal, and when the voltage change trend characteristic at a preset point is decreasing and the current change trend characteristic is increasing; A fault type determination unit is used to determine the type of grounding fault based on the voltage data, the current data, the voltage change speed characteristics and the current change speed characteristics of the preset point when it is identified that the high-speed railway cable has a grounding fault.

5. The high-speed railway cable grounding system status monitoring device according to claim 4 is characterized in that: The fault type determination unit is specifically used to: When the voltage data at the preset point is lower than the preset voltage threshold, the current data exceeds the preset current threshold, and the voltage change speed characteristic and the current change speed characteristic exceed the preset speed threshold, counting the abnormal duration of the data at the preset point, and when the abnormal duration of the data exceeds the preset duration, determining the ground fault type as an insulation damage ground fault; or, The ground fault type was determined to be an insulation aging ground fault.

6. The high-speed railway cable grounding system status monitoring device according to claim 4 is characterized in that: The fault analysis module further includes: A fault position determination unit is used to determine the grounding fault position of the high-speed railway cable according to the preset point position when it is identified that the high-speed railway cable has a grounding fault.

7. The high-speed railway cable grounding system status monitoring device according to claim 6 is characterized in that: The fault location determination unit is specifically used to: Acquiring zero-sequence current data of the preset point and two adjacent preset points; Obtaining the interval distance between the preset point and two adjacent preset points; The grounding fault position of the high-speed railway cable is determined according to the zero-sequence current data and the spacing distance.

8. A method for monitoring the status of a high-speed railway cable grounding system, characterized in that: The method comprises: The voltage data and current data of the preset points of the high-speed railway cable are obtained through the data acquisition module; Performing feature extraction on the voltage data to obtain voltage change features through a feature extraction module, and performing feature extraction on the current data to obtain current change features; The fault analysis module identifies whether the high-speed railway cable has a ground fault based on the voltage data, the current data, the voltage change characteristics and the current change characteristics, and determines the type of ground fault when it is identified that the high-speed railway cable has a ground fault.

9. The high-speed railway cable grounding system status monitoring method according to claim 8 is characterized in that: The data acquisition module is used to obtain the voltage and current data of the preset points of the high-speed railway cable, including: The voltage and current data of the power supply end, the load end and the preset intermediate points of the high-speed railway cable are obtained; wherein the preset intermediate points include equally spaced points, segmented points and environmental change points.

10. An electronic device, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the high-speed railway cable grounding system status monitoring method as described in any one of claims 8 to 9 are implemented.

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