Devices, methods and equipment for testing the water immersion of cable insulation

Abstract

This application discloses a device, method, and equipment for detecting water immersion in cable insulation, belonging to the field of Internet of Things (IoT) technology. The device includes: a leakage current acquisition module, installed at preset lengths along the cable, for acquiring leakage current of the cable in use; a leakage type determination module, used to determine whether the cable has a water immersion fault in its insulation layer based on the leakage current; and an alarm module, which, if a water immersion fault is detected, issues a water immersion alarm based on the location of the leakage current acquisition module. This technical solution can accurately determine whether a cable has a water immersion fault in its insulation layer in real time and can quickly locate the fault location. It improves the maintenance efficiency of repair personnel while reducing losses and extending cable life.

Description

Technical Field

[0001] This application belongs to the field of power equipment technology, and specifically relates to a device, method and equipment for detecting water immersion in cable insulation. Background Technology

[0002] When cables are put into use, they are wrapped with an insulation layer. This insulation layer prevents short circuits caused by exposed wires from damaging equipment and prevents wires exceeding safe voltage from posing a danger to people. Only under the protection of the insulation layer can cables operate normally and reliably. If the insulation layer is soaked with water, it can cause accidents such as leakage, short circuits, and corrosion of metal conductors, endangering personal safety and the integrity of the wiring.

[0003] Currently, cable insulation is primarily waterproofed by adding external waterproofing materials. However, if this external waterproofing material is damaged, the cable insulation will become waterlogged. When the insulation layer is intact, its insulation resistance is such that electrical components are isolated from the metal casing by the insulation layer. The insulation resistance of an intact insulation layer is in the megaohm to infinity range. Once the insulation layer is damaged, the insulation resistance will decrease. Nowadays, a multimeter is used to measure the insulation resistance to determine if the cable insulation layer is waterlogged. If the cable's operating voltage is below 500V, select the 10K resistance range on the multimeter. Connect one probe of the multimeter to the copper wire of a conductor running through a metal conduit or flexible metal tube, and the other probe to the metal casing and the grounding wire. If the measured insulation resistance is less than 0.5MΩ, it indicates that the external waterproofing material is damaged and the insulation layer is waterlogged.

[0004] Currently, it's impossible to detect water immersion in cable insulation in real time. Repair personnel are only dispatched when a cable malfunctions and fails to transmit power. Furthermore, repair personnel must troubleshoot each fault individually, wasting considerable time and incurring significant losses. This not only reduces cable lifespan but also potentially endangers personnel safety. Therefore, how to detect water immersion in cable insulation in real time, quickly pinpoint the immersion scenario, improve worker efficiency, reduce losses, and extend cable lifespan is a pressing issue in this field. Summary of the Invention

[0005] This application provides a cable insulation layer water immersion detection device, method, and equipment. The aim is to solve the problem that existing technologies cannot detect cable insulation layer water immersion faults in real time, requiring maintenance personnel to manually troubleshoot, resulting in significant time wastage, substantial losses, reduced cable lifespan, and potential safety hazards. The cable insulation layer water immersion detection device can accurately determine the presence of water immersion faults in the cable insulation layer in real time and quickly locate the fault. This improves maintenance efficiency, reduces losses, and extends cable lifespan.

[0006] In a first aspect, embodiments of this application provide a water immersion detection device for cable insulation layers, the device comprising:

[0007] Leakage current acquisition module, one is set at every preset length of the cable, to collect the leakage current of the cable in use;

[0008] A leakage type determination module is used to determine whether the cable has an insulation layer water immersion fault based on the leakage current.

[0009] If an insulation layer immersion fault is detected, the alarm module will issue a immersion alarm based on the location of the leakage current acquisition module.

[0010] Furthermore, the leakage type determination module is specifically used for:

[0011] Identify whether the magnitude of the leakage current is within a preset current range; wherein, the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults;

[0012] If so, then the cable fault type is determined to be a water immersion fault in the insulation layer.

[0013] Furthermore, the leakage type determination module is also used for:

[0014] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0015] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0016] If the fault is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0017] Furthermore, the leakage type determination module is specifically used for:

[0018] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0019] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0020] If it is within the preset range, then identify whether the rate of change of the leakage current is within the preset rate range;

[0021] If the speed is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0022] Furthermore, the leakage type determination module is also used for:

[0023] Obtain information about the cable's installation environment;

[0024] If it is the first environmental type, then acquire micro-meteorological information and determine the change model of the leakage current based on the micro-meteorological information;

[0025] If the change range of the leakage current is within a preset range, and the change rate of the leakage current is within a preset rate range, and is consistent with the change model of the leakage current, then the cable fault type is determined to be an insulation layer water immersion fault.

[0026] If it is the second environment type, then obtain the water level depth information of the cable laying environment;

[0027] If the change range of the leakage current is within a preset range, the change rate of the leakage current is within a preset rate range, and the water level depth information is higher than the cable laying height, then the cable fault type is determined to be an insulation layer water immersion fault.

[0028] Furthermore, the leakage type determination module is specifically used for:

[0029] If the magnitude of the leakage current is within the preset current range, and the leakage location of the leakage current matches the cable laying type, then the cable fault type is determined to be an insulation layer water immersion fault.

[0030] Secondly, embodiments of this application provide a method for detecting water immersion in cable insulation, the method comprising:

[0031] The leakage current of the cable in use is collected by a leakage current acquisition module; wherein, a leakage current acquisition module is set at every preset length of the cable;

[0032] The leakage type determination module determines whether the cable has an insulation layer water immersion fault based on the leakage current.

[0033] If a water immersion fault is found in the insulation layer, the alarm module will issue a water immersion alarm based on the location of the leakage current acquisition module.

[0034] Furthermore, determining whether the cable has an insulation layer water immersion fault based on the leakage current includes:

[0035] Identify whether the magnitude of the leakage current is within a preset current range; wherein, the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults;

[0036] If so, then the cable fault type is determined to be a water immersion fault in the insulation layer.

[0037] Furthermore, determining whether the cable has an insulation layer water immersion fault based on the leakage current also includes:

[0038] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0039] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0040] If the fault is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0041] Thirdly, embodiments of this application provide an electronic device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0042] Fourthly, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0043] Fifthly, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0044] In this embodiment, a leakage current acquisition module is installed at preset intervals along the cable to collect leakage current during use; a leakage type determination module is used to determine whether the cable has an insulation layer water immersion fault based on the leakage current; and an alarm module, if an insulation layer water immersion fault is found, issues a water immersion alarm based on the location of the leakage current acquisition module. This cable insulation layer water immersion detection device can accurately determine in real time whether a cable has an insulation layer water immersion fault and quickly locate the fault. This improves maintenance efficiency, reduces losses, and extends cable life. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the cable insulation layer immersion detection device provided in Embodiment 1 of this application;

[0046] Figure 2 This is a schematic diagram of the structure of the cable insulation layer immersion detection device provided in Embodiment 2 of this application;

[0047] Figure 3This is a schematic flowchart of the water immersion test method for cable insulation provided in Embodiment 3 of this application;

[0048] Figure 4 This is a schematic diagram of the structure of the electronic device provided in Embodiment 4 of this application. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. It should also be noted that, for ease of description, only the parts relevant to this application are shown in the drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0050] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0051] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0052] The following description, in conjunction with the accompanying drawings, details the cable insulation immersion detection device, method, and equipment provided in this application through specific embodiments and application scenarios.

[0053] Example 1

[0054] Figure 1This is a schematic diagram of the structure of the cable insulation layer immersion detection device provided in Embodiment 1 of this application.

[0055] like Figure 1 As shown, it specifically includes the following:

[0056] Leakage current acquisition module 101 is set at every preset length of the cable to collect the leakage current of the cable in use.

[0057] Leakage type determination module 102 is used to determine whether the cable has an insulation layer water immersion fault based on the leakage current;

[0058] If an insulation layer water immersion fault exists, the alarm module 103 will issue a water immersion alarm based on the location of the leakage current acquisition module.

[0059] Firstly, this solution can be used to detect and issue water immersion alarms for cable insulation faults. Specifically, a leakage current acquisition device can detect water immersion faults in the cable insulation, and a control terminal can issue a water immersion alarm. The leakage current acquisition device can be a residual current device (RCD) tester, and the control terminal can be a smart terminal device, such as a laptop, desktop computer, or tablet computer, or even an IoT platform.

[0060] Based on the above usage scenarios, it is understood that the implementing entity of this application can be a terminal device that integrates the functions of detecting whether there is a water immersion fault in the cable insulation layer and providing water immersion alarms; no further limitations are imposed here.

[0061] In this solution, the leakage current acquisition module can include a leakage current acquisition device, specifically a residual current device (RCD) tester. The RCD tester is a new generation of multi-functional leakage current testing instrument that integrates leakage current testing and RCD verification functions. It can conveniently test and verify circuits, electrical equipment, and RCDs. It tests the leakage current of circuits and electrical equipment under energized conditions; and tests and verifies the operating current and operating time of various models of RCDs under energized and de-energized conditions.

[0062] A cable can be a device for transmitting electrical energy or signals, and is usually composed of several or several groups of conductors, including power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, and aluminum alloy cables.

[0063] The preset length can be the length of the residual current device (RCD) tester. Specifically, the distance between two adjacent cable joints can be set to the preset length. Correspondingly, an RCD tester can be installed at each cable joint. Since the insulation layer is not conductive under normal circumstances, no current will be generated externally. However, the insulation layer will become conductive after being immersed in water. Therefore, the presence of a water immersion fault in the insulation layer can be determined by measuring whether there is a leakage current outside the insulation layer.

[0064] Leakage current refers to the tiny induced current generated around an insulating material under the influence of an electric field, typically measured in microamps. In this design, the leakage current can be the current generated outside the insulation layer.

[0065] After connecting the leakage current tester to the outside of the cable insulation layer, the high-precision microcomputer controller inside the leakage current tester can automatically determine the required range for testing the leakage current and automatically complete the range conversion, ultimately generating a leakage current reading. This completes the step of collecting the cable leakage current, and this reading can be used to determine whether there is a water immersion fault in the insulation layer.

[0066] When the leakage current tester measures leakage current outside the cable insulation layer, it can be further determined that the cable has a water immersion fault in the insulation layer.

[0067] A GPS (Navigation Satellite Timing and Ranging Global Position System) location tracker can be installed inside a residual current device (RCD) tester. Utilizing both GPS and GPRS (General Packet Radio Service) positioning technologies, the exact location of the target device can be accurately determined within a short time. Since the GPS tracker obtains location information via GPRS from an IoT SIM card, the IoT SIM card transmits the real-time location of the RCD tester to a server via the network. The server then performs data conversion to obtain the real-time coordinates of the RCD tester, i.e., the location of the leakage current acquisition module. GPS is a satellite-based positioning system used to obtain geographic location information and accurate Coordinated Time. GPRS is a wireless packet switching technology that provides end-to-end and wide-area wireless IP (Internet Protocol) connectivity.

[0068] Once the location of the leakage current acquisition module is obtained, it can be transmitted to a smart terminal device or IoT platform via wireless communication technology. The smart terminal device or IoT platform can display the location of the leakage current acquisition module in three forms: electronic map, satellite imagery, and topographic map. When triggering a water immersion alarm, the location of the leakage current acquisition module should be represented in geographic coordinates, such as (latitude, longitude). For example, the geographic coordinates of the leakage current acquisition module are (30°N 120°E), indicating that the module is located at 30 degrees North latitude and 120 degrees East longitude. The final water immersion alarm information can be represented as the location of the leakage current acquisition module minus the alarm information. Wireless communication refers to long-distance transmission communication between multiple nodes without the use of conductors or cables; radios, wireless radios, etc., can be used for wireless communication.

[0069] Based on the above technical solutions, optionally, the leakage type determination module is specifically used for:

[0070] Identify whether the magnitude of the leakage current is within a preset current range; wherein, the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults;

[0071] If so, then the cable fault type is determined to be a water immersion fault in the insulation layer.

[0072] In this scheme, the preset current range can be determined according to the leakage current standard. Specifically, the leakage current standard is 30mA (milliampere), which is the safe leakage current value for cables. When this value is exceeded, it can be determined that the cable fault type belongs to the insulation layer water immersion fault.

[0073] Because the leakage current of cables may vary depending on the historical occurrence of water immersion faults, statistical analysis revealed that a leakage current of 30mA would not cause any pathological physiological hazards to a person who has been electrocuted; however, a leakage current exceeding 30mA would cause such hazards. Therefore, the leakage current standard was set at 30mA. Accordingly, a leakage current range of 0mA to 30mA is considered as not having a water immersion fault in the insulation layer; a leakage current exceeding 30mA is considered as having a water immersion fault in the insulation layer.

[0074] When a smart terminal or IoT platform receives a leakage current value higher than 30mA from a leakage current tester via wireless communication technology, it can be determined that the cable fault type is a water immersion fault in the insulation layer.

[0075] In this solution, due to the insulation resistance between the cable and ground, a small leakage current will exist. This leakage current is not the leakage current when the cable has a water immersion fault in the insulation layer; it can be considered as the leakage current during normal cable operation. If a preset current range is not set to further determine whether the cable has a water immersion fault in the insulation layer, false alarms will occur, thereby reducing the work efficiency of maintenance personnel.

[0076] Based on the above technical solutions, optionally, the leakage type determination module is specifically used for:

[0077] If the magnitude of the leakage current is within the preset current range, and the leakage location of the leakage current matches the cable laying type, then the cable fault type is determined to be an insulation layer water immersion fault.

[0078] The leakage location can be the location where the leakage current is generated in the cable. For example, when the cable is in the first type of environment, i.e., a high-altitude environment, the leakage location can be the upper half of the cable; when the cable is in the second type of environment, i.e., an underground tunnel environment, the leakage location can be any part of the cable, above, below, left, and right.

[0079] Cable laying types can include aerial laying and underground tunnel laying, which are determined based on the cable laying environment information. The first environment type corresponds to aerial laying; the second laying type corresponds to underground tunnel laying.

[0080] When a residual current device (RCD) tester checks for leakage current, it can also locate the leakage point and transmit this location to a smart terminal or IoT platform via wireless communication. The smart terminal or IoT platform compares the leakage point with the cable installation type. If the leakage point matches the cable installation type and the leakage current is within a preset current range, the cable fault is determined to be a water immersion fault in the insulation layer. If the leakage current is within the preset current range, but the leakage point does not match the cable installation type, further investigation by maintenance personnel is required to determine if a fault exists. For example, if the leakage point is in the upper part of the cable and the cable installation type is high-altitude installation, the cable fault is determined to be a water immersion fault in the insulation layer; if the leakage point is in the lower part of the cable and the cable installation type is high-altitude installation, further investigation by maintenance personnel is required to determine if a fault exists.

[0081] This solution determines whether a cable fault is caused by water immersion in the insulation layer by comparing the location of the leakage current with the cable laying type. This method can quickly detect whether the cable insulation layer is water-immersed, thereby improving the work efficiency of maintenance personnel and extending the cable life to a certain extent.

[0082] Based on the above technical solutions, optionally, the leakage type determination module is further used for:

[0083] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0084] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0085] If the fault is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0086] In this scheme, the observation period can be the leakage current acquisition period of the leakage current tester. For example, if the leakage current tester reports the leakage current data to a smart terminal or IoT platform every minute via wireless communication technology, then the leakage current acquisition period of the leakage current tester is one minute. Furthermore, the observation period is one minute.

[0087] The variation range can be the difference between the maximum and minimum values ​​of the leakage current within the observation period. External environmental factors such as temperature, electric field strength, and humidity may cause a decrease in the insulation resistance between the cable and ground, leading to an increase in leakage current. However, this does not necessarily indicate a water immersion fault in the insulation layer. Therefore, the variation range of the leakage current must be measured. If the variation range is large, a water immersion fault in the insulation layer is confirmed; if the variation range is small, it indicates a short-term increase in leakage current due to environmental factors, and no water immersion fault has occurred. The formula for calculating the variation range is:

[0088] Variation range = Maximum leakage current - Minimum leakage current

[0089] The preset amplitude range can be the range of leakage current changes that would indicate an insulation immersion fault. Specifically, the preset amplitude range can be set to be greater than 10mA. When the leakage current tester transmits the leakage current data for one observation period to a smart terminal or IoT platform via wireless communication technology, the smart terminal or IoT platform uses the amplitude calculation formula to calculate the leakage current change within the observation period and compares this change with the preset amplitude range to identify whether the change is within the preset range. If the leakage current is within the preset current range but the leakage current change is between 0mA and 10mA, it is determined that there is no insulation immersion fault. If the leakage current is within the preset current range and the leakage current change is greater than 10mA, the cable fault type is determined to be an insulation immersion fault.

[0090] This solution determines a cable fault as an insulation immersion fault only when both the leakage current magnitude and the leakage current variation range are within a preset range. This avoids false alarms caused by a decrease in insulation resistance between the cable and ground due to environmental factors, leading to a short-term increase in leakage current. It increases the accuracy of insulation immersion detection and, to some extent, extends cable life. Without a preset range, the original leakage current might be close to reaching the preset range, but a slight increase due to environmental factors causes it to exceed the range, triggering an alarm. However, if the cable continues to operate normally without fault, this would reduce the efficiency of maintenance personnel.

[0091] Based on the above technical solutions, optionally, the leakage type determination module is specifically used for:

[0092] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0093] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0094] If it is within the preset range, then identify whether the rate of change of the leakage current is within the preset rate range;

[0095] If the speed is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0096] In this scheme, the rate of change can be the rate at which the leakage current changes from its minimum value to its maximum value, and the calculation formula can be:

[0097] Rate of change = Magnitude of change ÷ Time of change

[0098] Due to the influence of external environmental factors such as temperature, electric field strength, and humidity, leakage current may increase. It's possible for the leakage current to reach both the magnitude and the magnitude of its change to fall within a preset range. However, since the effects of external environmental factors are gradual, even if the leakage current increases due to these factors, it will decrease as the environment changes. Therefore, it can be concluded that the increase in leakage current caused by external environmental factors does not indicate a water immersion fault in the insulation layer. Thus, even if the leakage current reaches the preset range, the rate of change must be measured. If the rate of change is rapid, a water immersion fault in the insulation layer is confirmed; if the rate of change is slow, it indicates a short-term increase in leakage current due to environmental factors, and no water immersion fault in the insulation layer is present.

[0099] The preset speed range can be set to the rate of change of leakage current when an insulation immersion fault occurs. For example, the preset speed range can be set to be greater than 10 mA / s. When the leakage current tester transmits the leakage current data for one observation period to a smart terminal or IoT platform via wireless communication technology, the smart terminal or IoT platform uses the rate of change calculation formula to calculate the rate of change of leakage current from minimum to maximum value within the observation period, and compares this rate of change with the preset speed range to identify whether the rate of change is within the preset speed range. If the magnitude of the leakage current is within the preset current range, and the amplitude of the leakage current change is also within the preset amplitude range, but the rate of change of the leakage current is between 0 mA / s and 10 mA / s, it is determined that no insulation immersion fault has occurred. If the magnitude of the leakage current is within the preset current range, and the amplitude of the leakage current change is also within the preset amplitude range, and the rate of change of the leakage current is greater than 10 mA / s, the cable fault type is determined to be an insulation immersion fault.

[0100] This solution, by setting a preset speed range, avoids false alarms caused by increased leakage current due to external environmental influences, increases the accuracy of water immersion detection of cable insulation, and extends cable life to some extent. Furthermore, the more accurate fault diagnosis also improves the work efficiency of maintenance personnel.

[0101] In this embodiment, a leakage current acquisition module is installed at preset intervals along the cable to collect leakage current during use; a leakage type determination module is used to determine whether the cable has an insulation layer water immersion fault based on the leakage current; and an alarm module, if an insulation layer water immersion fault is found, issues a water immersion alarm based on the location of the leakage current acquisition module. This cable insulation layer water immersion detection device can accurately determine in real time whether a cable has an insulation layer water immersion fault and quickly locate the fault. This improves maintenance efficiency, reduces losses, and extends cable life.

[0102] The cable insulation immersion detection device in this application embodiment can be a device, or it can be a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, mobile electronic devices can be mobile phones, tablets, laptops, PDAs, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc., while non-mobile electronic devices can be servers, network attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service machines, etc. This application embodiment does not impose specific limitations.

[0103] The cable insulation immersion detection device in this embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this embodiment does not specifically limit its use.

[0104] Example 2

[0105] Figure 2 This is a schematic diagram of the structure of the cable insulation layer immersion detection device provided in Embodiment 2 of this application.

[0106] like Figure 2 As shown, it specifically includes the following:

[0107] The leakage type determination module 102 is also used for:

[0108] Obtain information about the cable's installation environment;

[0109] If it is the first environmental type, then acquire micro-meteorological information and determine the change model of the leakage current based on the micro-meteorological information;

[0110] If the change range of the leakage current is within a preset range, and the change rate of the leakage current is within a preset rate range, and is consistent with the change model of the leakage current, then the cable fault type is determined to be an insulation layer water immersion fault.

[0111] If it is the second environment type, then obtain the water level depth information of the cable laying environment;

[0112] If the change range of the leakage current is within a preset range, the change rate of the leakage current is within a preset rate range, and the water level depth information is higher than the cable laying height, then the cable fault type is determined to be an insulation layer water immersion fault.

[0113] In this plan, the laying environment information can be the laying environment type of the cable. Specifically, the laying environment type includes a first environment type and a second environment type. The first environment type is high-altitude type, and the second environment type is underground tunnel.

[0114] Cable height information can be collected using height sensors and then transmitted to smart terminals or IoT platforms via wireless communication technology. For example, when the cable is laid at high altitude, the height information can be represented as above ground - 50 meters; when laid in an underground tunnel, the height information can be represented as underground - 10 meters. By reading this height information, smart terminals or IoT platforms can further determine whether the cable is laid at high altitude or in an underground tunnel.

[0115] Micro-meteorological information can be the weather information of the day, including meteorological elements such as wind speed, wind direction, rainfall, air temperature, air humidity, light intensity, soil temperature, soil moisture, atmospheric pressure, and evaporation.

[0116] A leakage current variation model can be a big data model that judges leakage current based on micro-meteorological information, and can be composed of multiple leakage current variation sub-models. For example, if the micro-meteorological information for the day indicates heavy rain between 7:00 and 8:00 AM, the leakage current variation model can determine that there may be leakage current between 7:15 and 8:00 AM. After 8:00 AM, due to the cessation of rain, the leakage current may decrease or may not exist.

[0117] When the cable is in the first environmental type, the micro-meteorological information of the environment is monitored by meteorological sensors and transmitted to the smart terminal or Internet of Things platform using wireless communication technology. The smart terminal or Internet of Things platform can then obtain the micro-meteorological information at that time.

[0118] The leakage current variation model can be pre-trained. This involves inputting micro-meteorological information and leakage current variations into a data modeling tool, training individual leakage current variation sub-models through calculations defined at each node, and then combining all sub-models to obtain the final leakage current variation model. When a smart terminal or IoT platform acquires micro-meteorological information, it inputs this information into the leakage current variation model. Calculations determine whether this micro-meteorological information corresponds to one of the leakage current variation sub-models. If the leakage current variation amplitude is within a preset range, the leakage current variation rate is within a preset range, and it corresponds to one of the leakage current variation sub-models, then the cable fault type is determined to be an insulation layer water immersion fault. If the leakage current variation amplitude is within a preset range, the leakage current variation rate is within a preset range, but it does not correspond to one of the leakage current variation sub-models, then no insulation layer water immersion fault has occurred.

[0119] Water level depth information can refer to the water level depth of an underground tunnel, which is expressed relative to the total depth of the tunnel. For example, if the total depth of the underground tunnel is 100 meters and the water level depth is 40 meters, then the water surface is 60 meters below the ground. Cable laying height is also expressed relative to the total depth of the underground tunnel; if the cable laying height is 80 meters, then the cable is 20 meters below the ground.

[0120] Water level depth can be measured using a pressure water level sensor. After being transmitted to a smart terminal or IoT platform via wireless communication technology, the smart terminal or IoT platform can obtain the water level depth information in real time.

[0121] After the cable is laid, the laying height can be pre-stored on a smart terminal or IoT platform. When the water level depth information is obtained, the smart terminal or IoT platform will compare the laying height information with the water level depth information. If the water level depth is higher than the laying height, and the change range of the leakage current is within the preset range, and the change rate of the leakage current is within the preset speed range, then the cable fault type is determined to be an insulation layer water immersion fault. If the change range of the leakage current is within the preset range, and the change rate of the leakage current is within the preset speed range, but the water level depth is lower than the laying height, then it is determined that there is no insulation layer water immersion fault.

[0122] The technical solution provided in this embodiment determines whether a cable fault is caused by water immersion in the insulation layer by setting different environmental types and measuring the leakage current under different environmental types. This method provides more accurate fault type identification, improves the work efficiency of maintenance personnel, and extends cable life to a certain extent.

[0123] Example 3

[0124] Figure 3This is a schematic flowchart of the water immersion test method for cable insulation provided in Embodiment 3 of this application.

[0125] like Figure 3 As shown, the specific steps include the following:

[0126] S301, the leakage current of the cable in use is collected by the leakage current acquisition module; wherein, the leakage current acquisition module is set at every preset length of the cable;

[0127] S302, The leakage type determination module determines whether the cable has an insulation layer water immersion fault based on the leakage current;

[0128] S303, if there is a water immersion fault in the insulation layer, the alarm module will issue a water immersion alarm based on the location of the leakage current acquisition module.

[0129] Furthermore, determining whether the cable has an insulation layer water immersion fault based on the leakage current includes:

[0130] Identify whether the magnitude of the leakage current is within a preset current range; wherein, the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults;

[0131] If so, then the cable fault type is determined to be a water immersion fault in the insulation layer.

[0132] Furthermore, determining whether the cable has an insulation layer water immersion fault based on the leakage current also includes:

[0133] Identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical immersion leakage currents;

[0134] If so, then identify whether the change in leakage current is within a preset range during the observation period;

[0135] If the fault is within the preset range, the cable fault type is determined to be a water immersion fault in the insulation layer.

[0136] In this embodiment, a leakage current acquisition module collects the leakage current of the cable in use; wherein, one leakage current acquisition module is set at every preset length of the cable; a leakage type determination module determines whether the cable has an insulation layer water immersion fault based on the leakage current; if an insulation layer water immersion fault is found, an alarm module issues a water immersion alarm based on the location of the leakage current acquisition module. This cable insulation layer water immersion detection method can accurately determine whether the cable has an insulation layer water immersion fault in real time and can quickly locate the fault location. This improves the maintenance efficiency of repair personnel while reducing losses and extending cable life.

[0137] The water immersion detection method for cable insulation provided in this embodiment corresponds to the device provided in the above embodiments and has a corresponding execution process and beneficial effects, which will not be described in detail here.

[0138] Example 4

[0139] like Figure 4 As shown, this application embodiment also provides an electronic device 400, including a processor 401, a memory 402, and a program or instructions stored in the memory 402 and executable on the processor 401. When the program or instructions are executed by the processor 401, they implement the various processes of the above-described cable insulation layer water immersion detection device embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0140] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0141] Example 5

[0142] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described cable insulation immersion detection device embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0143] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0144] Example 6

[0145] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described cable insulation layer water immersion detection device embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0146] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0147] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0148] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0149] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0150] The above description is merely a preferred embodiment and the technical principles employed in this application. This 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 depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A device for detecting water immersion in cable insulation, characterized in that, The device includes: Leakage current acquisition module, one is set at every preset length of the cable, to collect the leakage current of the cable in use; A leakage type determination module is used to determine whether the cable has an insulation layer water immersion fault based on the leakage current. If an insulation layer water immersion fault is detected, the alarm module will issue a water immersion alarm based on the location of the leakage current acquisition module. The leakage type determination module is specifically used to: identify whether the magnitude of the leakage current is within a preset current range; wherein, the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults; if so, the cable fault type is determined to be an insulation layer water immersion fault. The leakage type determination module is further configured to: identify whether the magnitude of the leakage current is within a preset leakage current range; wherein the preset leakage current range is obtained by statistical analysis of historical immersion leakage current data; if so, identify whether the change amplitude of the leakage current is within a preset amplitude range during the observation period; if it is within the preset amplitude range, determine that the cable fault type belongs to the insulation layer immersion fault. The leakage type determination module is specifically used to: identify whether the magnitude of the leakage current is within a preset leakage current range; wherein, the preset leakage current range is obtained based on statistical data of historical water immersion leakage current; if so, identify whether the change amplitude of the leakage current is within a preset amplitude range within the observation period; if within the preset amplitude range, identify whether the change rate of the leakage current is within a preset rate range; if within the preset rate range, determine that the cable fault type belongs to the insulation layer water immersion fault. The leakage type determination module is further configured to: acquire cable laying environment information; if it is a first environment type, acquire micro-meteorological information and determine the leakage current change model based on the micro-meteorological information; if the leakage current change amplitude is within a preset amplitude range, and the leakage current change rate is within a preset speed range, and matches the leakage current change model, then determine that the cable fault type belongs to insulation layer water immersion fault; if it is a second environment type, acquire water level depth information of the cable laying environment; if the leakage current change amplitude is within a preset amplitude range, and the leakage current change rate is within a preset speed range, and the water level depth information is higher than the cable laying height, then determine that the cable fault type belongs to insulation layer water immersion fault.

2. The cable insulation immersion detection device according to claim 1, characterized in that, The leakage type determination module is specifically used for: If the magnitude of the leakage current is within the preset current range, and the leakage location of the leakage current matches the cable laying type, then the cable fault type is determined to be an insulation layer water immersion fault.

3. A method for detecting water immersion in cable insulation, characterized in that, The method includes: The leakage current of the cable in use is collected by a leakage current acquisition module; wherein, a leakage current acquisition module is set at every preset length of the cable; The leakage type determination module determines whether the cable has an insulation layer water immersion fault based on the leakage current. If a water immersion fault is found in the insulation layer, the alarm module will issue a water immersion alarm based on the location of the leakage current acquisition module. The process of determining whether a cable has an insulation layer water immersion fault based on the leakage current includes: identifying whether the magnitude of the leakage current is within a preset current range; wherein the preset current range is obtained by statistically analyzing the leakage current of cables with historical water immersion faults; if so, the cable fault type is determined to be an insulation layer water immersion fault. The method of determining whether a cable has an insulation layer water immersion fault based on the leakage current further includes: identifying whether the magnitude of the leakage current is within a preset leakage current range; wherein the preset leakage current range is obtained by statistical analysis of historical water immersion leakage current data; if so, identifying whether the change amplitude of the leakage current within the observation period is within a preset amplitude range; if it is within the preset amplitude range, determining that the cable fault type is an insulation layer water immersion fault. The method of determining whether a cable has an insulation layer water immersion fault based on the leakage current includes: identifying whether the magnitude of the leakage current is within a preset leakage current range; wherein the preset leakage current range is obtained based on statistical data of historical water immersion leakage currents; if so, identifying whether the change amplitude of the leakage current within the observation period is within a preset amplitude range; if within the preset amplitude range, identifying whether the change rate of the leakage current is within a preset rate range; if within the preset rate range, determining that the cable fault type is an insulation layer water immersion fault. The method further includes: acquiring cable laying environment information; if it is a first environment type, acquiring micro-meteorological information and determining the leakage current change model based on the micro-meteorological information; if the leakage current change amplitude is within a preset amplitude range, and the leakage current change rate is within a preset speed range, and matches the leakage current change model, then determining that the cable fault type belongs to insulation layer water immersion fault; if it is a second environment type, acquiring water level depth information of the cable laying environment; if the leakage current change amplitude is within a preset amplitude range, and the leakage current change rate is within a preset speed range, and the water level depth information is higher than the cable laying height, then determining that the cable fault type belongs to insulation layer water immersion fault.

4. An electronic device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the water immersion detection method for cable insulation as described in claim 3.

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