High-voltage cable wiring device and insulation detection method
By designing a high-voltage cable connection device and combining multimodal testing with machine learning algorithms, real-time and accurate monitoring of the insulation performance of high-voltage cables was achieved, solving the real-time and safety problems of traditional testing methods and improving the reliability and safety of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SANXIA JINSHAJIANG YUNCHUAN HYDROPOWER DEV CO LTD
- Filing Date
- 2024-03-27
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional high-voltage cable testing methods cannot meet real-time requirements, lack intuitiveness, and pose safety hazards. Periodic testing may miss critical issues, leading to accidents.
Design a high-voltage cable connection device to achieve real-time and intuitive insulation performance monitoring through the connection mechanism, and combine multimodal testing and machine learning algorithms to evaluate the insulation status, including dielectric spectrum testing, partial discharge detection and thermal image analysis, and establish an insulation status model for real-time data analysis.
It improves the efficiency and safety of insulation performance testing, reduces operational risks, enables real-time and accurate assessment of the insulation status of high-voltage cables, and enhances the reliability and safety of the system.
Smart Images
Figure CN121933767A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-voltage cable technology, and in particular to a high-voltage cable wiring device and insulation testing method. Background Technology
[0002] High-voltage cables play a crucial role in the operation of high-voltage motors, but the reliability and safety of their insulation performance directly affect the working condition of high-voltage motors. Traditional high-voltage cables have some technical shortcomings. First, existing technology mainly relies on periodic professional inspections, but such periodic inspections cannot meet the requirements for real-time cable status. In power systems, cable insulation performance may deteriorate outside the inspection cycle, so this method may miss critical issues and lead to accidents.
[0003] Secondly, traditional alarm mechanisms are usually based on current or temperature monitoring. While this method can sense the operating status of the cable system, it lacks intuitiveness. Maintenance personnel often need to rely on specialized equipment to interpret the monitoring data, which increases the complexity of system operation and the difficulty of maintenance. At the same time, there are safety hazards during maintenance. Due to the potential danger caused by current conduction, power needs to be cut off during maintenance. However, currently, maintenance personnel cannot intuitively judge the insulation performance of high-voltage cables when inspecting them, so they cannot determine whether there is leakage, which may lead to safety accidents. Summary of the Invention
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.
[0005] In view of the problems existing in the prior art, the present invention is proposed.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-voltage cable wiring device, characterized in that: it includes a high-voltage motor, comprising a high-voltage motor body, a control cabinet disposed on the outer wall of the high-voltage motor body, a terminal block disposed on the inner wall of the control cabinet, and a cable movably disposed on the end face of the terminal block, the inner wall of the control cabinet being connected to a ground wire; and a wiring mechanism, comprising a guide tube movably sleeved on the outer wall of the cable, a housing movably sleeved on the outer wall of the guide tube, a locking disc slidably disposed on the inner wall of the housing, and a grounding end locked on the outer wall of the cable, wherein a grounding wire is provided between the grounding end and the control cabinet.
[0007] In a preferred embodiment of the high-voltage cable wiring device of the present invention, a partition (K-6) is fixedly provided on the inner wall of the housing (K-2), an electromagnet (K-7) is provided on the inner wall of the partition (K-6), and a second elastic element (K-8) is provided between the partition (K-6) and the locking disc (K-3).
[0008] In a preferred embodiment of the high-voltage cable wiring device of the present invention, the second elastic element (K-8) is sleeved on the outer wall of the electromagnet (K-7), and a wedge-shaped cylinder (K-9) is provided at one end of the housing (K-2) near the grounding end (K-4).
[0009] In a preferred embodiment of the high-voltage cable connection device of the present invention, the inner wall of the wedge-shaped cylinder (K-9) is provided with a groove (K-10), and the inner wall of the wedge-shaped cylinder (K-9) is also provided with a ball (K-11).
[0010] In a preferred embodiment of the high-voltage cable connection device of the present invention, the ball (K-11) is slidably disposed on the inner wall of the groove (K-10), and the outer wall of the guide tube (K-1) is provided with a groove (K-12), and the ball (K-11) engages with the groove (K-12).
[0011] In a preferred embodiment of the high-voltage cable connection device of the present invention, the end of the guide tube (K-1) that extends to the outside of the housing (K-2) is provided with a fitting post (K-13), and the end face of the grounding end (K-4) is provided with a locking groove (K-14).
[0012] In a preferred embodiment of the high-voltage cable wiring device of the present invention, the fitting post (K-13) is fitted to the inner wall of the locking groove (K-14), and a third elastic element (K-15) is provided between the outer wall of the fitting post (K-13) and the outer wall of the housing (K-2).
[0013] The beneficial effects of the high-voltage cable connection device in this invention are as follows: Real-time and intuitive insulation performance monitoring is achieved through the connection mechanism. When the cable insulation performance deteriorates, the device provides an intuitive alarm through the contact phenomenon between the housing and the grounding end, which improves the efficiency and intuitiveness of problem detection. The multi-layered safety mechanism ensures rapid and safe current cutoff, effectively reducing operational risks, making maintenance work safer, and reducing disassembly and assembly steps for staff to perform performance checks, thus increasing convenience.
[0014] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: an insulation detection method, characterized in that it includes a high-voltage cable connection device; and performs multimodal testing, uses dielectric spectroscopy testing to obtain detailed information on the performance of the insulation material, performs partial discharge testing to identify potential insulation fault points, performs thermal imaging testing to identify existing thermal anomalies; acquires measurement data, establishes an insulation state model, uses historical data to train and verify the model, and uses the trained state model to perform real-time data analysis.
[0015] In a preferred embodiment of the insulation testing method of the present invention, the multimodal testing includes measuring the dielectric response of the cable using a high-frequency dielectric spectrometer to obtain the frequency response relationship between the electric field and the dielectric. The complex dielectric constant of the insulating material is obtained by the following formula:
[0016] ε * (ω,T,H)=ε′(ω,T,H)-θω''(ω,T,H)
[0017] Where ω is the electric field frequency, T is the temperature, H is the humidity, and ε * ε' is the complex dielectric constant, ω'' is the real part of the dielectric constant, and ω'' is the imaginary part of the dielectric constant. The high-voltage cable connection device is used to perform partial discharge detection on the high-voltage cable to monitor possible partial discharge activities in the cable. An infrared thermal imager is used to detect the temperature distribution on the cable surface, thereby identifying possible thermal anomalies and indicating problems with the insulation status.
[0018] As a preferred embodiment of the insulation detection method described in this invention, the following steps are taken: an insulation state model is established using machine learning algorithms such as neural networks and support vector machines; the insulation state model is established based on multimodal test data; the insulation state model is trained and validated, using historical datasets for model training and another independent validation dataset to evaluate the model's performance; the difference between the model's predicted values and the true values is measured using a loss function.
[0019]
[0020] Where J is the loss function, m is the number of samples in the dataset, and y (i) Let i be the actual label of the i-th sample. The model predicts the value of the i-th sample; real-time data analysis is performed, the trained model is deployed to the real-time monitoring system, the real-time collected data is analyzed, and timely insulation status assessment is provided.
[0021] The beneficial effects of the insulation detection method in this invention are as follows: by using different testing methods simultaneously, multi-dimensional and comprehensive insulation status information can be obtained, thereby more accurately assessing the health status of the cable. The comprehensive use helps to improve the sensitivity and accuracy of the detection. Through machine learning algorithms, patterns in the data can be discovered, improving the accuracy of the detection. Furthermore, it has the ability to perform real-time analysis, enabling the system to respond to potential problems in a timely manner, further improving the reliability of the high-voltage cable system. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the 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. Wherein:
[0023] Figure 1 This is a schematic diagram of the overall high-voltage cable connection device in this invention.
[0024] Figure 2 This is a schematic diagram of the internal structure of the control cabinet in this invention.
[0025] Figure 3 This is a schematic diagram of the wiring mechanism in this invention.
[0026] Figure 4 This is a schematic diagram of the internal wiring mechanism in this invention.
[0027] Figure 5 This is a schematic diagram of the insulation detection method in this invention. Detailed Implementation
[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.
[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.
[0031] Example 1
[0032] Reference Figures 1-4 This is the first embodiment of the present invention. This embodiment provides a high-voltage cable connection device. When the staff finds that the housing K-2 of a certain section of cable 104 is in contact with the grounding terminal K-4, it proves that the insulation performance of that section of cable 104 has deteriorated.
[0033] Specifically, a high-voltage cable connection device is characterized by comprising: a high-voltage motor 100, including a high-voltage motor body 101, a control cabinet 102 disposed on the outer wall of the high-voltage motor body 101, terminal blocks 103 disposed on the inner wall of the control cabinet 102, and a cable 104 movably disposed on the end face of the terminal blocks 103; the inner wall of the control cabinet 102 is connected to a ground wire; and...
[0034] The wiring mechanism K includes a guide tube K-1 movably sleeved on the outer wall of the cable 104, a housing K-2 movably sleeved on the outer wall of the guide tube K-1, a locking disc K-3 slidably disposed on the inner wall of the housing K-2, and a grounding terminal K-4 locked on the outer wall of the cable 104. A grounding wire K-5 is provided between the grounding terminal K-4 and the control cabinet 102.
[0035] The inner wall of the housing K-2 is fixedly provided with a partition K-6, the inner wall of the partition K-6 is provided with an electromagnet K-7, and a second elastic element K-8 is provided between the partition K-6 and the locking plate K-3. The second elastic element K-8 is sleeved on the outer wall of the electromagnet K-7.
[0036] More preferably, a wedge-shaped cylinder K-9 is provided at one end of the housing K-2 near the grounding end K-4, a groove K-10 is provided on the inner wall of the wedge-shaped cylinder K-9, and a ball K-11 is also provided on the inner wall of the wedge-shaped cylinder K-9, with the ball K-11 slidingly disposed on the inner wall of the groove K-10.
[0037] Furthermore, the outer wall of the guide tube K-1 is provided with a groove K-12, the sphere K-11 engages with the groove K-12, and the end of the guide tube K-1 that extends to the outside of the shell K-2 is provided with a fitting post K-13.
[0038] Preferably, the grounding terminal K-4 has a locking groove K-14 on its end face, the bonding post K-13 is bonded to the inner wall of the locking groove K-14, and a third elastic element K-15 is provided between the outer wall of the bonding post K-13 and the outer wall of the housing K-2.
[0039] Preferably, the current guide tube K-1 is made of copper alloy and is attached to the surface of the cable 104. When the cable 104 is damaged and the insulation effect deteriorates, the overflow current can be conducted along the current guide tube K-1. The housing K-2 is made of insulating plastic. One housing K-2 is set along the cable 104 at intervals and each housing K-2 is numbered according to the distance.
[0040] Furthermore, the grounding wire K-5 can be grounded through the control cabinet 102 or directly connected to the ground, depending on the distance. This allows the grounding terminal K-4 to be electrically connected to the ground through the grounding wire K-5, and to conduct the leakage current to the ground. The electromagnet K-7 can generate a magnetic field when current passes through it. The sphere K-11 is made of metal, so the sphere K-11 will be attracted and moved by the magnetic field.
[0041] Preferably, the partition K-6, the locking disc K-3 and the guide tube K-1 are provided with a circular hole at their center, and the cable 104 slides through the partition K-6, the locking disc K-3 and the guide tube K-1 in sequence, and the grounding end K-4 is fixed to the outer wall of the cable 104 by a screw.
[0042] Preferably, the groove K-12 is a funnel-shaped groove, and three spheres K-11 and three grooves K-12 are arranged in a circumferential array. The two ends of the sphere K-11 are respectively attached to and slide in contact with the groove K-12 and the engaging groove K-14. The second elastic element K-8 and the third elastic element K-15 are springs. The second elastic element K-8 causes the engaging disc K-3 to press the sphere K-11 downward, and the third elastic element K-15 causes the guide tube K-1 to have an outward tendency relative to the shell K-2.
[0043] In summary, during use, the high-voltage cable connection device is installed on the outer wall of cable 104 at the set intervals, and the grounding terminal K-4 is connected to the ground through grounding wire K-5. When the insulation layer of cable 104 connected to the high-voltage motor body 101 is damaged or the insulation performance is reduced for other reasons, the leaked current will be conducted along the guide tube K-1 to the electromagnet K-7 and generate magnetism to attract the ball K-11. The ball K-11 overcomes the elastic force of the second elastic element K-8 and pushes the locking disc K-3 upward to move, and moves to the larger diameter of the wedge cylinder K-9. The end of the ball is engaged with the groove K-12 and the locking groove K-14, thus eliminating the restriction on the guide tube K-1. Driven by the third elastic element K-15, the ball moves closer to the grounding end K-4 and guides the current inside the guide tube K-1 to the ground. When the staff finds that the shell K-2 of a certain section of cable 104 is in contact with the grounding end K-4, it proves that the insulation performance of that section of cable 104 has deteriorated and needs to be repaired. At the same time, the power must be disconnected before the repair work can be carried out, making the insulation performance more intuitive and improving the safety of operation.
[0044] Example 2
[0045] Reference Figure 5This is the fourth embodiment of the present invention. This embodiment provides an insulation detection method. By using different testing methods simultaneously, multi-dimensional and comprehensive insulation status information can be obtained, thereby more accurately assessing the health status of the cable. Through intelligent data analysis, the insulation status of the cable can be evaluated in real time under different working conditions, thereby timely identifying potential problems and improving the reliability of the cable system.
[0046] Specifically, an insulation testing method includes a high-voltage cable connection device; and performs multimodal testing, uses dielectric spectroscopy to obtain detailed information on the properties of the insulation material, performs partial discharge testing to identify potential insulation fault points, performs thermal imaging testing to identify existing thermal anomalies; acquires measurement data, establishes an insulation state model, trains and validates the model using historical data, and performs real-time data analysis using the trained state model.
[0047] Among them, multimodal testing covers a variety of testing methods such as dielectric spectrum, partial discharge, and thermal imaging, providing comprehensive and multi-dimensional information on the insulation status of cables, and providing a more complete understanding of the health status of cables;
[0048] It should be noted that multimodal testing includes measuring the dielectric response of the cable using a high-frequency dielectric spectrometer to obtain the frequency response relationship between the electric field and the dielectric. The complex dielectric constant of the insulating material is obtained by the following formula:
[0049] ε * (ω,T,H)=ε′(ω,T,H)-θω''(ω,T,H)
[0050] Where ω is the electric field frequency, T is the temperature, H is the humidity, and ε * Let ε' be the complex permittivity, ε′ be the real part of the permittivity, and ω'' be the imaginary part of the permittivity.
[0051] Using a high-voltage cable connection device to perform partial discharge detection on high-voltage cables monitors potential partial discharge activity within the cable. By comprehensively analyzing different test results, the state of the insulation medium can be determined more accurately, thus improving the accuracy of fault detection.
[0052] Infrared thermal imagers are used to detect the temperature distribution on the cable surface, thereby identifying potential thermal anomalies and indicating insulation problems. By fusing test data from different modes, the limitations of individual test methods can be overcome, improving overall reliability and stability.
[0053] Even better, an insulation state model is established using machine learning algorithms such as neural networks and support vector machines; based on multimodal test data, the insulation state model is established, and the system learns and identifies patterns and correlations between different modal test data, thereby better understanding the characteristics of cable insulation state.
[0054] The insulation state model was trained and validated using a historical dataset and evaluated using a separate set of validation datasets. The difference between the model's predictions and the actual values was measured using a loss function.
[0055]
[0056] Where J is the loss function, m is the number of samples in the dataset, and y (i) Let i be the actual label of the i-th sample. This is the model prediction value for the i-th sample;
[0057] Preferably, real-time data analysis is performed, the trained model is deployed to the real-time monitoring system, the real-time collected data is analyzed, timely insulation status assessment is provided, intelligent data analysis is used to monitor the status changes of the cable in real time and predict potential faults, so that maintenance personnel can take timely measures and improve the real-time performance and predictability of the system.
[0058] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0059] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.
[0060] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.
[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A high-voltage cable connection device, characterized in that: Includes a high-voltage motor (100), comprising a high-voltage motor body (101), a control cabinet (102) disposed on the outer wall of the high-voltage motor body (101), a terminal block (103) disposed on the inner wall of the control cabinet (102), and a cable (104) movably disposed on the end face of the terminal block (103), wherein the inner wall of the control cabinet (102) is connected to a ground wire; The wiring mechanism (K) includes a guide tube (K-1) movably sleeved on the outer wall of the cable (104), a housing (K-2) movably sleeved on the outer wall of the guide tube (K-1), a locking disc (K-3) slidably disposed on the inner wall of the housing (K-2), and a grounding terminal (K-4) locked on the outer wall of the cable (104). A grounding wire (K-5) is provided between the grounding terminal (K-4) and the control cabinet (102).
2. The high-voltage cable connection device as described in claim 1, characterized in that: The inner wall of the housing (K-2) is fixedly provided with a partition (K-6), the inner wall of the partition (K-6) is provided with an electromagnet (K-7), and a second elastic element (K-8) is provided between the partition (K-6) and the locking disc (K-3).
3. The high-voltage cable connection device as described in claim 2, characterized in that: The second elastic element (K-8) is sleeved on the outer wall of the electromagnet (K-7), and a wedge-shaped cylinder (K-9) is provided at one end of the housing (K-2) near the grounding end (K-4).
4. The high-voltage cable connection device as described in claim 3, characterized in that: The inner wall of the wedge-shaped cylinder (K-9) is provided with a groove (K-10), and the inner wall of the wedge-shaped cylinder (K-9) is also provided with a sphere (K-11).
5. The high-voltage cable connection device as described in claim 4, characterized in that: The sphere (K-11) is slidably disposed on the inner wall of the groove (K-10), and the outer wall of the guide pipe (K-1) is provided with a groove (K-12), and the sphere (K-11) engages with the groove (K-12).
6. The high-voltage cable connection device as described in claim 5, characterized in that: The end of the guide tube (K-1) that extends to the outside of the housing (K-2) is provided with a fitting post (K-13), and the end face of the grounding end (K-4) is provided with a locking groove (K-14).
7. The high-voltage cable connection device as described in claim 6, characterized in that: The bonding post (K-13) is bonded to the inner wall of the locking groove (K-14), and a third elastic element (K-15) is provided between the outer wall of the bonding post (K-13) and the outer wall of the housing (K-2).
8. An insulation testing method, characterized in that: The high-voltage cable connection device as described in any one of claims 1-7; and, Multimodal testing is performed, dielectric spectroscopy is used to obtain detailed information on the properties of insulating materials, partial discharge testing is performed to identify potential insulation fault points, and thermal imaging testing is performed to identify existing thermal anomalies. Acquire measurement data, establish an insulation state model, train and validate the model using historical data, and perform real-time data analysis using the trained state model.
9. The insulation testing method as described in claim 8, characterized in that: The multimodal testing includes measuring the dielectric response of the cable using a high-frequency dielectric spectrometer to obtain the frequency response relationship between the electric field and the dielectric. The complex dielectric constant of the insulating material is obtained by the following formula: e * (ω, T, H)=ε′(ω, T, H)-θω''(ω, T, H) ω is the electric field frequency, T is the temperature, H is the humidity, and ε is the electric field frequency. * Let ε' be the complex permittivity, ε′ be the real part of the permittivity, and ω'' be the imaginary part of the permittivity. The high-voltage cable connection device is used to perform partial discharge detection on the high-voltage cable to monitor possible partial discharge activities in the cable. Infrared thermal imagers are used to detect the temperature distribution on the cable surface, thereby identifying potential thermal anomalies and indicating problems with the insulation condition.
10. The insulation testing method as described in claim 9, characterized in that: Establish an insulation state model. Machine learning algorithms utilizing neural networks and support vector machines; An insulation state model was established based on multimodal test data; The insulation state model was trained and validated using a historical dataset and evaluated using a separate set of validation datasets. The difference between the model's predictions and the actual values was measured using a loss function. J is the loss function, m is the number of samples in the dataset, and y (i) Let i be the actual label of the i-th sample. This is the model prediction value for the i-th sample; Perform real-time data analysis, deploy the trained model to the real-time monitoring system, analyze the real-time collected data, and provide timely insulation status assessment.