High-voltage cable defect detection methods, detection systems, electronic equipment and storage media

Abstract

This invention provides a method, system, electronic device, and storage medium for detecting defects in high-voltage cables, belonging to the field of electrical testing technology. This defect detection method utilizes the spectral signal wavelength changes caused by temperature rise due to ablation defects in the water-blocking buffer layer of high-voltage cables, as well as the simultaneous release of characteristic gases. By detecting the spectral signal, the presence of defects in the target section is determined. Then, the gas in the target section is sampled and analyzed, and the ablation defects are identified and judged based on the composition and concentration amplitude of the gas signal. It uses non-electrical characteristic quantities to locate and detect the ablation defects, avoiding the influence of electromagnetic interference on the testing equipment. It also eliminates the need for personnel to perform imaging inspections of the high-voltage cable along the entire route, effectively improving the on-site adaptability and accuracy of detecting ablation defects in the buffer layer of high-voltage cables.

Description

Technical Field

[0001] This invention relates to the field of electrical testing technology, and in particular to a method, system, electronic device, and storage medium for detecting defects in high-voltage cables. Background Technology

[0002] High-voltage cables are a crucial component of power systems, and their operational reliability is a fundamental prerequisite for ensuring the safe and stable operation of the power system. In recent years, high-voltage cable breakdown faults caused by the erosion of the water-blocking buffer layer have frequently occurred in China, becoming the most significant cause of cable failures. In the past five years, faults caused by buffer layer erosion defects have accounted for over 80% of high-voltage cable insulation breakdown faults. Cables with buffer layer erosion defects must be replaced entirely, resulting in substantial economic losses. Furthermore, the number of such faults is showing an increasing trend year by year, necessitating regular inspection for these structural defects.

[0003] In related technologies, the detection technology for ablation defects in the water-blocking buffer layer of high-voltage cables mainly adopts X-ray imaging. A portable X-ray machine is used to perform radiographic imaging on the high-voltage cable section to observe the location of possible defects.

[0004] The detection methods employed in related technologies typically require personnel to carry equipment to the section of high-voltage cable to be inspected. Since the locations of high-voltage cables are not fixed, this presents inconveniences for both equipment installation and personnel inspection, especially in rugged mountainous areas, slopes, or underground sections. Furthermore, the vicinity of high-voltage cables often contains numerous other electrical devices or lines, whose electromagnetic interference can interfere with the detection imaging, affecting the accuracy of the inspection. Summary of the Invention

[0005] This invention provides a method, system, electronic device, and computer storage medium for detecting defects in high-voltage cables, which improves the field adaptability and accuracy of detecting ablation defects in the buffer layer of high-voltage cables. The technical solution is as follows:

[0006] In a first aspect, embodiments of the present invention provide a method for detecting defects in high-voltage cables, comprising:

[0007] The spectral signal of the target segment of the high-voltage cable is detected and identified to determine the presence of defects in the target segment;

[0008] The gas inside the water-blocking buffer layer in the target section of the high-voltage cable is sampled and inspected. The ablation defects of the water-blocking buffer layer are determined based on the composition and content range of the gas.

[0009] Optionally, detecting and identifying the spectral signal of the target segment of the high-voltage cable to determine the presence of a defect in the target segment includes:

[0010] Acquire the spectral signal of the target section of the high-voltage cable;

[0011] Filter the spectral signal to a specified wavelength band;

[0012] Identify the spectral signal located in the specified band.

[0013] Optionally, identifying the spectral signal located in the designated band includes:

[0014] The spectral signal after filtering light is identified using a spectral detector. If the spectral signal located in the specified band is identified, it is determined that there is a defect in the high-voltage cable located in the target detection section.

[0015] Optionally, the step of sampling and inspecting the gas inside the water-blocking buffer layer in the target section of the high-voltage cable, and determining the ablation defects of the water-blocking buffer layer based on the composition and content range of the gas, includes:

[0016] Gas is extracted from inside the water-blocking buffer layer through the gas intake port of the high-voltage cable;

[0017] The gases are classified according to their molecular weight or molecular weight density;

[0018] Multiple different types of gases were detected separately to obtain the composition and concentration range of each type of gas;

[0019] The degree of ablation defects is determined by comparing the composition and content amplitude of various gases with standard thresholds.

[0020] Optionally, the identification of the spectral signal of the target section of the high-voltage cable and the sampling inspection of the gas inside the water-blocking buffer layer in the target section of the high-voltage cable can be performed separately or simultaneously.

[0021] Secondly, the present invention provides a detection system, comprising:

[0022] The spectral detection module is used to detect and identify the spectral signal of the target section of the high-voltage cable to determine whether there is a defect in the target section.

[0023] The gas detection module is used to sample and inspect the gas inside the water-blocking buffer layer in the target section of the high-voltage cable, and to determine the ablation defects of the water-blocking buffer layer based on the composition and content range of the gas.

[0024] Optionally, the spectral detection module includes:

[0025] A spectral sensor unit is used to acquire the spectral signal of the target section of the high-voltage cable;

[0026] A linear gradient filter unit is used to filter the spectral signal to a specified wavelength band;

[0027] A spectral detection unit is used to identify the spectral signal located in the specified wavelength band.

[0028] Optionally, the gas detection module includes:

[0029] An air extraction unit is used to extract gas from the air intake of the high-voltage cable inside the water-blocking buffer layer.

[0030] The gas separation unit is used to classify the gas according to its molecular weight or molecular weight density.

[0031] A multi-channel gas sensing unit is used to detect multiple different types of gases to obtain the composition and concentration amplitude of these gases.

[0032] The central processing unit is used to compare the composition and content amplitude of various gases with standard thresholds to determine the degree of ablation defects.

[0033] Optionally, the spectral detection module and the gas detection module are integrated into a portable housing.

[0034] Thirdly, the present invention also provides an electronic device, comprising:

[0035] processor;

[0036] Memory used to store instructions that can be executed by the processor;

[0037] The processor is configured to execute the high-voltage cable defect detection method described in the first aspect above.

[0038] Fourthly, the present invention also provides a storage medium storing computer instructions thereon, which, when executed by a processor, implement the high-voltage cable defect detection method described in the first aspect above.

[0039] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0040] The high-voltage cable defect detection method provided in this invention utilizes the spectral signal wavelength change caused by the temperature rise due to ablation defects in the water-blocking buffer layer of the high-voltage cable, as well as the simultaneous precipitation of characteristic gases. By detecting the spectral signal, the presence of defects within the target section is confirmed. Then, the gas within the target section is sampled and analyzed, and the ablation defects are identified and determined based on the composition and concentration amplitude of the gas signal. This method uses non-electrical characteristic quantities to locate and detect the ablation defects, avoiding the influence of electromagnetic interference on the detection equipment. It also eliminates the need for personnel to perform imaging inspections of the high-voltage cable along the entire route, effectively improving the on-site adaptability and accuracy of high-voltage cable buffer layer ablation defect detection. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a flowchart of a high-voltage cable defect detection method provided in an embodiment of the present invention;

[0043] Figure 2 This is a flowchart of step S1 provided in an embodiment of the present invention;

[0044] Figure 3 This is a flowchart of step S2 provided in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of a detection system provided in an embodiment of the present invention;

[0046] Figure 5 This is a structural block diagram of the spectral detection module in the detection system provided in the embodiments of the present invention;

[0047] Figure 6 This is a structural block diagram of the gas detection module in the detection system provided in this embodiment of the invention;

[0048] Figure 7 This is a schematic diagram of the control structure of an electronic device provided in an embodiment of the present invention.

[0049] In the picture:

[0050] 1-Spectrum detection module; 2-Gas detection module; 3-Host computer system; 11-Spectrum sensor unit; 12-Linear gradient filter unit; 13-Spectrum detection unit; 21-Gas extraction unit; 22-Gas distribution unit; 23-Multi-channel gas sensing unit; 24-Central processing unit; 4100-Electronic equipment; 4101-Processor; 4103-Communication interface; 4104-Bus; m-High voltage cable; n-Power supply. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0052] Figure 1 This is a flowchart of a high-voltage cable defect detection method provided in an embodiment of the present invention. Figure 1 As shown, this embodiment of the invention provides a method for detecting defects in high-voltage cables, which includes:

[0053] S1 detects and identifies the spectral signal of the target section of the high-voltage cable to determine if there is a defect in the target section.

[0054] S2, sample the gas inside the water-blocking buffer layer in the target section of the high-voltage cable and determine the ablation defects of the water-blocking buffer layer based on the composition and content amplitude of the gas.

[0055] Using the high-voltage cable defect detection method provided in this invention, when conducting on-site detection of ablation defects in high-voltage cable m, personnel can carry relevant detection tools to the target section of high-voltage cable m to be inspected. First, a spectral sensor, such as a photosensitive element or optical fiber, is used to acquire the spectral signal of the target section. During the ablation of the water-blocking buffer layer of high-voltage cable m, the temperature at the defect location rises, generating a spectral signal with a wide wavelength range. The characteristic spectrum is obtained after passing through a linear graded filter. The characteristic spectrum is identified using a spectral detector and sent to the central processing unit through the channel control unit. After algorithm analysis, it is displayed on the host computer system, allowing personnel to preliminarily determine the target section where the ablation defect exists.

[0056] If the water-blocking buffer layer in a high-voltage cable has an ablation defect, because it is located between the insulation shield and the corrugated aluminum sheath within the high-voltage cable, the water-blocking buffer layer will undergo an electrochemical reaction. Under the conditions of unipolar current and the presence of water, the pure aluminum material of the corrugated aluminum sheath will undergo the following reaction:

[0057] H₂O→H⁺OH⁻

[0058] Cathode: 6H+ + 6e → 3H2

[0059] Anode: 6OH⁻ - 6e⁻ → 3H₂O + 3[O]

[0060] 2Al + 3[O] → Al₂O₃↓ + 1669J

[0061] All:2Al+3H2O=Al2O3↓+3H2↑+1669J (1)

[0062] Formula (1) above shows that aluminum quickly undergoes electro-corrosion under the conditions of water and electric current. After corrosion, Al2O3 and H2 are produced, and 1669J of energy is released. This energy acts on the buffer layer. According to the heat balance equation:

[0063] Q = Cm(T - T0) (2)

[0064] The specific heat capacity C of the buffer layer is approximately 1.024 kJ / kg℃. Assuming a 2mm wide and 5mm long buffer layer is in contact with the aluminum sheath, its mass m is taken as 15-20 mg, and the ambient temperature T0 is taken as 20℃, the calculated heating temperature of the buffer layer is 101.5-128.6℃. Therefore, this reaction will produce at least hydrogen gas and white aluminum oxide powder, leading to an increase in the temperature of both the buffer layer and the outer surface of the cable.

[0065] The buffer layer is typically made of polyethylene terephthalate (PET), with the chemical formula (C10H8O4)n. PET contains a large number of relatively highly reactive ester groups, which are prone to thermal degradation reactions involving molecular chain breakage under heat and oxygen. Therefore, during the ablation of the buffer layer, the PET molecular chains break, and in the reaction of free radicals, hydrocarbon gases containing the three elements C, H, and O, such as H2, CO, CO2, CH4, C2H6, C2H4, and C2H2, are generated.

[0066] Therefore, by sampling the gas inside the water-blocking buffer layer of the target section of the high-voltage cable m at a pre-set gas intake point near the target section, the gas type and amplitude are collected and stored by the gas signal processing module. After the central processing unit performs algorithmic analysis on the gas information, it is displayed on the host computer system, and the ablation defects of the water-blocking buffer layer are determined based on the composition and content amplitude of the aforementioned gas. The determination criteria are based on the following table:

[0067]

[0068] The high-voltage cable defect detection method provided in this invention utilizes the spectral signal wavelength change caused by the temperature rise due to ablation defects in the water-blocking buffer layer of the high-voltage cable m, as well as the simultaneous precipitation of characteristic gases. By detecting the spectral signal, the presence of defects within the target section is confirmed. Then, the gas in the target section is sampled and analyzed, and the ablation defects are identified and determined based on the composition and concentration amplitude of the gas signal. This method uses non-electrical characteristic quantities to locate and detect the ablation defects, avoiding the influence of electromagnetic interference on the detection equipment. It also eliminates the need for personnel to perform imaging inspections of the high-voltage cable m along the entire route, effectively improving the on-site adaptability and accuracy of high-voltage cable buffer layer ablation defect detection.

[0069] Optionally, the identification of the spectral signal of the target section of the high-voltage cable and the gas sampling inspection inside the water-blocking buffer layer of the target section of the high-voltage cable can be performed separately or simultaneously. In this embodiment of the invention, the spectral signal and the gas signal can be detected simultaneously or sequentially. When the spectral signal is acquired and detected using a non-invasive spectral sensor and detector, the spectral signal should be detected first to determine if there is a defect in the target section before the gas signal is detected. This avoids drilling holes in the corrugated aluminum sheath of the cable multiple times or at multiple locations to extract gas, and also improves the accuracy of the detection. When gas extraction is performed directly from the pre-set gas extraction port on the high-voltage cable, a detection device integrating a spectral sensor and gas extraction function can be directly connected to it, and the spectral signal and gas signal can be detected simultaneously, improving the overall efficiency of defect detection.

[0070] Figure 2 This is a flowchart of step S1 provided in an embodiment of the present invention. Figure 2 As shown, in one possible implementation, step S1 specifically includes the following steps:

[0071] S11. Obtain the spectral signal of the target section of the high-voltage cable.

[0072] Specifically, in this embodiment of the invention, workers can use portable spectral sensors, such as photosensitive elements or fiber optic sensors, to insert into the high-voltage cable through pre-fabricated vents on the cable to detect hot spots inside the cable. The vents on the high-voltage cable are designed to facilitate inspection work by workers, and are pre-positioned at points where cable ablation may occur, based on the characteristics of gas overflow and diffusion mechanisms within the cable.

[0073] S12. Filter the spectral signal to the specified wavelength band.

[0074] Specifically, in this embodiment of the invention, the spectral signal acquired by the spectral sensor is filtered through a linear gradient filter to a specified wavelength band for easier analysis and detection. For example, the 9–14 μm wavelength band is selected to facilitate subsequent observation of the temperature during the ablation process of the high-voltage cable buffer layer, and the 0.01–0.40 μm wavelength band is selected to facilitate subsequent observation of the invisible light during the ablation process of the high-voltage cable buffer layer.

[0075] S13. Identify spectral signals located in the specified band.

[0076] Specifically, in this embodiment of the invention, the spectral signal of the filtered light to a specified wavelength band can be detected and obtained by a corresponding spectral detector. If a spectral signal located in the specified wavelength band exists, it can be determined that there is an ablation defect in the high-voltage cable located in the target detection section, and further determination of the degree of ablation defect is required.

[0077] Figure 3 This is a flowchart of step S2 provided in an embodiment of the present invention. Figure 3 As shown, in one possible implementation, step S2 specifically includes the following steps:

[0078] S21. Gas is extracted from inside the water-blocking buffer layer through the gas intake port of the high-voltage cable.

[0079] Specifically, in this embodiment of the invention, after identifying an ablation defect in the detection section of the high-voltage cable through spectral signals, it is necessary to determine the degree of the ablation defect based on the internal gas. At this time, an air extraction device, such as an air pipe with an air pump connected to the air intake of the high-voltage cable, is used to extract the gas inside the water-blocking buffer layer.

[0080] S22. Classify gases according to their molecular weight or molecular weight density.

[0081] Specifically, in this embodiment of the invention, the extracted gas is divided into zones according to molecular weight or molecular density using a gas separation device, providing a sealed space for subsequent gas composition detection.

[0082] S23. Detect different types of gases separately to obtain the composition and content range of different types of gases.

[0083] Specifically, in this embodiment of the invention, a multi-channel gas sensing linear array can be formed by combining and arranging multiple types of gas detection sensors to detect and classify the various gases in the previous step, and output the gas type and gas content amplitude.

[0084] S24. The degree of ablation defects is determined by comparing the composition and content amplitude of various gases with the standard threshold.

[0085] Specifically, in this embodiment of the invention, after the gas is detected by the multi-channel gas sensing linear array in the step, the peak value and gas type are sent to the signal acquisition and processing module and stored in the data buffer unit after the peak hold unit performs algorithm analysis on the gas information, and then displayed on the host computer system.

[0086] Figure 4 This is a structural block diagram of a detection system provided in an embodiment of the present invention. Figure 5 This is a structural block diagram of the spectral detection module in the detection system provided in the embodiment of the present invention. Figure 6 This is a structural block diagram of the gas detection module in the detection system provided in an embodiment of the present invention. Figures 4 to 6 As shown, the detection system has the function of implementing the above-mentioned high-voltage cable defect detection method. The detection system includes a spectral detection module 1 and a gas detection module 2. The spectral detection module 1 is used to detect and identify the spectral signal of the target segment of the high-voltage cable to determine the presence of defects in the target segment. The gas detection module 2 is used to sample and inspect the gas inside the water-blocking buffer layer of the target segment of the high-voltage cable, and to determine the ablation defects of the water-blocking buffer layer based on the composition and concentration amplitude of the gas. The high-voltage cable defect detection system provided in this embodiment utilizes the change in spectral signal wavelength caused by the temperature rise due to ablation defects in the water-blocking buffer layer of the high-voltage cable, and the simultaneous precipitation of characteristic gases. By detecting the spectral signal to confirm the presence of defects in the target segment, the gas in the target segment is sampled and analyzed, and the ablation defects are identified and determined based on the composition and concentration amplitude of the gas signal. It uses non-electrical characteristic quantities to locate and detect the occurrence of ablation defects, which can avoid the influence of electromagnetic interference on the detection instruments and equipment, and also eliminates the need for personnel to conduct imaging inspections of high-voltage cables along the entire route. This can effectively improve the on-site adaptability and accuracy of detecting ablation defects in the buffer layer of high-voltage cables.

[0087] Optionally, the spectral detection module 1 includes a spectral sensor unit 11, a linear graded filter unit 12, and a spectral detection unit 13. The spectral sensor unit 11 is used to acquire the spectral signal of the target section of the high-voltage cable; the spectral sensor unit 11 can be a photosensitive element or a fiber optic sensor. The linear graded filter unit 12 is used to filter the spectral signal to a specified wavelength band; the linear graded filter unit 12 can be a linear graded filter. The spectral detection unit 13 is used to identify the spectral signal located in the specified wavelength band. When the spectral sensor is a photosensitive element, the spectral detection unit 13 can be an infrared detector; when the spectral sensor is an optical fiber, the spectral detection unit 13 can be a linear spectral array.

[0088] Optionally, the gas detection module 2 includes a gas extraction unit 21, a gas distribution unit 22, a multi-channel gas sensing unit 23, and a central processing unit 24. The gas extraction unit 21 extracts gas from the gas inlet of the high-voltage cable inside the water-blocking buffer layer; the gas extraction unit 21 can be a gas pipe equipped with a pump. The gas distribution unit 22 classifies the gases according to molecular weight or molecular weight density. The multi-channel gas sensing unit 23 detects multiple different types of gases separately to obtain the composition and concentration amplitude of each gas. The multi-channel gas sensing unit 23 can be constructed by arranging multiple gas detection sensors to form a multi-channel gas sensing linear array, acquiring gas type and gas signal amplitude, and improving the signal-to-noise ratio through signal superposition processing for a certain period. The central processing unit 24 compares the composition and concentration amplitude of multiple different gases with standard thresholds to determine the degree of ablation defects. The central processing unit 24 can be a portable computer terminal capable of performing algorithmic analysis and other processing on spectral and gas signals; it is the final execution unit for program execution. The central processing unit 24 can be connected to the host computer system 3 via wired or wireless communication. After the data of spectral signal detection and gas signal detection are uploaded through the central processing unit 24, the data processing and analysis can be exchanged, the analysis results can be displayed, and the control of each unit module in the spectral detection module 1 and the gas detection module 2 can be achieved, which is convenient for the staff to operate.

[0089] Optionally, the spectral detection module 1 and the gas detection module 2 are integrated into a portable housing. Exemplarily, in this embodiment of the invention, each unit module of the spectral detection module 1 and the gas detection module 2 can be integrated into one unit and installed in a portable housing, which is equipped with a power supply n to power the spectral detection module 1 and the gas detection module 2. This facilitates the carrying and transportation of the unit by personnel when high-voltage cable defect detection is required.

[0090] Figure 7 This is a schematic diagram of the control structure of an electronic device provided in an embodiment of the present invention. Figure 7 As shown, the electronic device includes a processor and a memory for storing processor-executable instructions. The electronic device 4100 can be a computer device, and it may include one or more of the following components: a processor 4101, a memory 4102, a communication interface 4103, and a bus 4104.

[0091] The processor 4101 includes one or more processing cores. The processor 4101 executes various functional applications and information processing by running software programs and modules. The memory 4102 and the communication interface 4103 are connected to the processor 4101 via a bus 4104. The memory 4102 can be used to store at least one instruction, which the processor 4101 uses to execute to implement the various steps in the above method embodiments.

[0092] Furthermore, memory 4102 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic storage, flash memory, and programmable read-only memory (PROM).

[0093] For example, in this embodiment of the invention, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions, which can be executed by a processor to perform the aforementioned high-voltage cable defect detection method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0094] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0095] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for detecting defects in high-voltage cables, characterized in that, include: Detecting and identifying the spectral signal of a target section of a high-voltage cable to determine the presence of a defect in the target section includes: acquiring the spectral signal of the target section of the high-voltage cable; filtering the spectral signal to a specified wavelength band through a linear graded filter, the specified wavelength band including the 9~14μm band or the 0.01~0.40μm band; identifying the filtered spectral signal using a spectral detector; if the spectral signal located in the specified wavelength band is identified, it is determined that a defect exists in the high-voltage cable located in the target section. The process involves sampling and inspecting the gas inside the water-blocking buffer layer of the target section of the high-voltage cable. Based on the composition and concentration amplitude of the gas, the ablation defects of the water-blocking buffer layer are determined. This includes: extracting gas from the water-blocking buffer layer through a gas sampling port on the high-voltage cable, the sampling port being a pre-positioned port at a location where ablation may occur, based on the gas overflow characteristics and diffusion mechanism in the cable; classifying the gas according to molecular weight or molecular weight density; detecting different types of gases using a multi-channel gas sensing linear array composed of multiple gas detection sensors, and sending the maximum amplitude and gas type within a certain time period to a signal acquisition and processing module via a peak hold device to obtain the composition and concentration amplitudes of different types of gases; and comparing the composition and concentration amplitudes of different types of gases with standard thresholds to determine the degree of ablation defects.

2. The high-voltage cable defect detection method according to claim 1, characterized in that, The identification of the spectral signal of the target section of the high-voltage cable and the sampling inspection of the gas inside the water-blocking buffer layer of the target section of the high-voltage cable can be performed separately or simultaneously.

3. A detection system for performing the high-voltage cable defect detection method according to claim 1, characterized in that, The detection system includes: The spectral detection module (1) is used to detect and identify the spectral signal of the target section of the high-voltage cable to determine whether a defect exists in the target section. The spectral detection module (1) includes: A spectral sensor unit (11) is used to acquire the spectral signal of the target section of the high-voltage cable; A linear gradient filter unit (12) is used to filter the spectral signal to a specified wavelength band; A spectral detection unit (13) is used to identify the spectral signal located in the specified band; The gas detection module (2) is used to sample and inspect the gas inside the water-blocking buffer layer in the target section of the high-voltage cable, and to determine the ablation defects of the water-blocking buffer layer based on the composition and content range of the gas. The gas detection module (2) includes: The air extraction unit (21) is used to extract gas from the air intake of the high-voltage cable inside the water-blocking buffer layer. Gas separation unit (22) is used to classify the gas according to molecular weight or molecular weight density; A multi-channel gas sensing unit (23) is used to detect different types of gases to obtain the composition and content amplitude of different types of gases; The central processing unit (24) is used to compare the composition and content amplitude of various gases with standard thresholds to determine the degree of ablation defects.

4. The detection system according to claim 3, characterized in that, The spectral detection module (1) and the gas detection module (2) are integrated in the portable housing.

5. An electronic device, characterized in that, include: processor; Memory used to store instructions that can be executed by the processor; The processor is configured to execute the high-voltage cable defect detection method according to any one of claims 1 to 2.

6. A storage medium storing computer instructions thereon, characterized in that, When the computer instructions are executed by the processor, they implement the high-voltage cable defect detection method according to any one of claims 1 to 2.

Images