Integrated cable fault positioning device

Abstract

The invention discloses an integrated cable fault positioning device, which comprises a fault positioning power supply module, a resistance reduction burn-through module, a distance measurement module, a three-gear capacitance adjustment module, an AI intelligent waveform analysis module, an Internet of Things communication module and a safety monitoring module, according to the invention, the fault positioning power supply module, the resistance reduction burnthrough module and the distance measurement module are integrally designed and a one-time wiring mode is adopted, so that complex wiring and debugging processes during cooperative work of a plurality of devices are avoided, and the preparation time before testing is greatly shortened. A high-resistance fault is converted into a low-resistance fault through the resistance-reducing burnthrough module, and the resistance value of a fault cable is monitored in real time to automatically stop resistance-reducing burnthrough. The connection mode of the high-voltage capacitor is switched through a three-gear capacitor adjusting function, the impact energy is adjusted to effectively break down a fault point, and different cable fault types are covered. The equipment is monitored in real time through the safety monitoring module, so that the safety risk and the equipment loss are reduced. The AI intelligent waveform analysis can remove interference information, quickly judge the fault distance and reduce the power failure time.

Description

Technical Field

[0001] The present invention relates to the technical field of cable fault testing, and more particularly to an integrated cable fault locating device. Background Art

[0002] In modern power transmission and distribution networks, cables, as key energy carriers, are widely used in various fields. However, over long-term operation, cables are susceptible to failure due to various factors, such as environmental corrosion, mechanical damage, and electrical aging. If a cable failure cannot be detected and repaired promptly and accurately, it will lead to power outages, severely impacting social production and daily life.

[0003] Traditional cable fault testing equipment has numerous drawbacks. First, traditional test equipment typically consists of multiple independent devices working together, resulting in extremely complex wiring between them. In real-world testing scenarios, technicians spend a significant amount of time and effort connecting and debugging the devices. This is not only inefficient, but also prone to connection errors during the complex wiring process, hindering the testing process and prolonging troubleshooting time. Second, the waveforms obtained by traditional impulse current sampling methods are extremely complex. These waveforms contain a lot of interference, making accurate analysis and interpretation extremely challenging for inexperienced professionals. This can easily lead to errors and delays in fault diagnosis, making it difficult to quickly locate the fault point. Furthermore, the surge energy of the locating power supply in traditional test equipment is difficult to precisely control. If the surge energy is too high, it may not only penetrate the fault point but also damage other parts of the cable, further expanding the fault range. However, if the surge energy is too low, the fault point may not be effectively penetrated, resulting in test failure and requiring repeated attempts, increasing testing costs and time. In addition, if the burning-through process of cable fault resistance reduction is not stopped in time, the damage to the fault point may be aggravated, causing the conductor at the fault point to melt or carbonize too much, destroying the cable structure near the fault point, expanding the scope of the fault, and increasing the difficulty of repair. Excessive temperature may ignite flammable materials around the cable and cause a fire. Excessive current will cause the cable fault test equipment connected to it to heat up severely, causing increased thermal stress inside the equipment, thereby damaging equipment components, affecting the normal operation of the equipment, and reducing the service life of the equipment.

[0004] Therefore, it is necessary to invent an integrated cable fault locating device to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an integrated cable fault locating device to solve the problem raised in the above-mentioned background technology that traditional testing equipment is usually composed of multiple independent devices working together, the wiring between devices is extremely complicated, and the testing efficiency is low.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: including a fault locating power supply module, a resistance reduction and burn-through module, a ranging module, a three-speed capacitor adjustment module, an AI intelligent waveform analysis module, an Internet of Things communication module, and a safety monitoring module. The fault locating power supply module, the resistance reduction and burn-through module, and the ranging module are integrated into one using a primary wiring method. The three-speed capacitor adjustment module changes the high-voltage capacitor wiring method by designing a capacitor conversion mechanism composed of a stationary disk and a rotating disk to select different capacitor gears according to the cable fault type. The resistance reduction and burn-through module monitors the resistance change of the faulty cable in real time during the process of converting a high-resistance fault into a low-resistance fault until the resistance reduction and burn-through are automatically stopped when the appropriate resistance value is reached. The safety monitoring module monitors the ground loop, step voltage, instrument temperature, and authority key status in real time to cut off, discharge, and restore the high-voltage power supply, and simultaneously provides safety status prompt information to protect personnel safety.

[0007] As a further description of the above technical solution, the three-stage capacitance adjustment module is based on the energy formula W=1 / 2CV 2 To adjust the capacitance and voltage, so that the output energy is stable at 2000J, where W represents the energy stored in the capacitor, C represents the capacitance of the capacitor, and V represents the voltage across the capacitor.

[0008] As a further description of the above technical solution, the static disk of the capacitance conversion mechanism of the three-speed capacitance adjustment module is connected to the capacitor, and the rotating disk performs capacitance series and parallel adjustment;

[0009] As a further description of the above technical solution, the three-speed capacitance adjustment module is provided with two gears: a high voltage and small capacitance gear and a low voltage and large capacitance gear;

[0010] As a further description of the above technical solution, the AI intelligent waveform analysis module combines the principle of multiple pulse testing with a built-in artificial intelligence algorithm to automatically process and compare test waveform data and determine the fault distance;

[0011] As a further description of the above technical solution, the IoT communication module supports network connection, includes a supporting APP, and can upload test data to the IoT platform;

[0012] As a further description of the above technical solution, the Internet of Things platform is used to realize centralized management and sharing of test data;

[0013] As a further description of the above technical solution, the artificial intelligence algorithm of the AI intelligent waveform analysis module has self-learning and optimization capabilities.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. The present invention integrates the fault location power supply module, resistance reduction burn-through module and distance measurement module into an integrated design and a one-time wiring method, avoiding the complicated wiring and debugging process when multiple devices work together, greatly shortening the preparation time before testing. The AI intelligent waveform analysis function can quickly determine the fault distance, reducing the time of manual waveform analysis, significantly improving test efficiency, increasing the speed of fault investigation, reducing power outage time, and ensuring the normal operation of the power system.

[0016] 2. The present invention combines the AI intelligent waveform analysis function with the principle of multiple pulse testing to effectively remove interference information and accurately determine the fault distance. Through continuous learning and optimization of the AI algorithm, as test data accumulates, the accuracy of fault analysis continues to improve, which makes the test results more reliable, reduces maintenance delays and resource waste caused by fault judgment errors, and improves the reliability and stability of the power system. The integrated design reduces the size and weight of the equipment, and reduces the production and transportation costs of the equipment. At the same time, the fast and accurate testing process reduces the workload and test time of the testers, and reduces labor costs. In addition, accurate fault location avoids unnecessary damage to the cable, reduces maintenance costs, and comprehensively reduces the total cost of cable fault testing;

[0017] 3. The present invention can accurately adjust the power supply impact energy according to different cable fault types by setting a three-speed capacitance adjustment technology, effectively breaking down various fault points, whether it is a high-resistance fault or a low-resistance fault, as well as high-resistance flashover inside the connector and water-influent cable faults that traditional equipment is difficult to deal with. This device can quickly and effectively test, expanding the scope of application of the test device and improving the ability to deal with complex faults. The all-round safety protection function monitors key indicators in real time, and immediately cuts off the high voltage and discharges once an abnormality occurs, effectively preventing equipment damage and personal safety accidents. This provides reliable safety protection for testers, reduces safety risks during the test process, and protects the life safety of testers and the normal operation of equipment.

[0018] 4. The present invention uses a resistance reduction and burn-through module to monitor the resistance change of the faulty cable in real time when converting a high-resistance fault into a low-resistance fault until the resistance reduction and burn-through are automatically stopped when the appropriate resistance is reached. This protects the cable body and insulation structure, avoids excessive damage to the insulation layer, prevents deformation of the cable structure, controls the damage range of the fault point, avoids the expansion of the fault range, reduces the risk of fire and electric shock, avoids overload of cable fault testing equipment, and reduces safety risks and equipment losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A system structure diagram of an integrated cable fault locating device provided by the present invention;

[0020] Figure 2A test flow chart of an integrated cable fault locating device provided by the present invention;

[0021] Figure 3 A schematic structural diagram of a capacitance conversion mechanism provided by the present invention;

[0022] Figure 4 A schematic diagram of the distribution of rotating disk electrodes provided by the present invention;

[0023] Figure 5 A schematic diagram of the wiring of a stationary disk and a rotating disk provided by the present invention;

[0024] Figure 6 A front view of a stationary disk and rotating disk connecting shaft provided by the present invention;

[0025] Figure 7 This is a rear view of a stationary disk and rotating disk connecting shaft provided by the present invention;

[0026] Figure 8 This is a schematic diagram of the central electrode structure of a rotating disk provided by the present invention. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The integrated cable fault locating device of the present invention integrates a fault locating power supply module, a resistance reduction burn-through module, and a distance measurement module. Its compact and rational structural design effectively reduces the device's size and weight. The device uses a single-wiring method, allowing operators to complete multiple cable fault testing tasks with a single simple wiring operation, significantly avoiding the tedious operations and potential errors associated with multiple wiring operations. For example, in actual operation, technicians no longer need to spend a lot of time connecting the lines of multiple devices, as with traditional equipment. Instead, they only need to connect the device to the cable once to start the testing process, greatly improving work efficiency.

[0030] Three-speed capacitance adjustment module: equipped with three-speed capacitance adjustment function, according to the energy formula W = 1 / 2CV 2(W is energy, C is capacitance, and V is voltage). By precisely adjusting capacitance and voltage, the energy output is ensured to be stable at 2000J. When facing different types of cable faults, the appropriate capacitance gear can be flexibly selected. For high-resistance faults, the high-voltage and low-capacitance gear is selected, and the high voltage is used to provide enough energy to break through the high-resistance fault point; for low-resistance faults, the low-voltage and high-capacitance gear is selected, which can avoid damage to the cable caused by excessive energy while ensuring a stable 2000J energy output, ensuring the effectiveness and safety of the test. Figure 3 The figure shows the capacitance conversion mechanism structure of the three-speed capacitance adjustment module, which consists of a stationary disk 1 and a rotating disk 2. The stationary disk includes 8 electrodes, and the rotating disk contains 22 electrodes. The rotating disk and the stationary disk together realize the three-speed capacitance switching. Figure 4 The figure shows the distribution of electrodes on the rotating disk. One electrode is placed at the center of the rotating disk as a common electrode, which divides the rotating disk into 30°-150° area 3, 150°-270° area 4, and 270°-30° area 5. The remaining 21 electrodes are divided into 3 groups and placed in 3 areas respectively. Figure 5 The figure shows the wiring diagram of the stationary disk and the rotating disk of the present invention. The A1 and A2 electrodes, A3 and A4 electrodes, A5 and A6 electrodes, and A7 and A8 electrodes of the stationary disk electrode group 6 are respectively connected to the two ends of the four capacitors. The electrode group 7 is located in the 30°-150° area 3 of the rotating disk. The B1, B2, B3 and B4 electrodes in the electrode group 7 are connected, and the B5, B6, B7 and B8 electrodes are connected; the electrode group 8 is located in the 150°-270° area 4 of the rotating disk. The C2 and C3 electrodes in the electrode group 8 are connected, the C4 and C5 electrodes are connected, and the C6 and C7 electrodes are connected; the electrode group 9 is located in the 270°-30° area 5 of the rotating disk. The D2 and D3 electrodes in the electrode group 9 are connected, the D4 and D8 electrodes are connected, and the D6 and D7 electrodes are connected. The B1, C1 and D1 electrodes are common electrodes and are located in the center of the rotating disk. The area division and wiring of the rotating disk change the series and parallel connection mode of the high-voltage capacitors, thereby realizing three-speed capacitance conversion. As Figure 6 The front view of the stationary disk and rotating disk connecting shaft of the present invention is shown as follows: Figure 7 The figure shows the rear view of the connecting shaft of the stationary disk and rotating disk of the present invention. The connecting shaft is slotted at 120° intervals, and the three slots are connected. A fixed slot is opened below one of the slots. The connecting shaft allows the rotating disk to rotate only one circle clockwise. After rotating one circle clockwise, it can only rotate one circle counterclockwise, realizing gear selection and preventing the wire from getting tangled. Figure 8 The figure shows the structure diagram of the central electrode of the rotating disk of the present invention. The central electrode of the rotating disk is connected to one end of the rotating disk connecting shaft of the stationary disk. The connecting shaft can rotate and be fixed on the central electrode of the rotating disk, so as to accurately lock into one of the gears.

[0031] AI Intelligent Waveform Analysis Module: Integrating the principles of multiple pulse testing, the device features a built-in advanced artificial intelligence algorithm. During testing, the algorithm efficiently processes and accurately compares collected fault waveform data. Using preset fault models and rules, the AI algorithm can quickly and accurately determine fault distances. Furthermore, the AI algorithm possesses self-learning and optimization capabilities, continuously improving the accuracy and reliability of fault analysis as test data accumulates. For example, after multiple tests, the AI algorithm can automatically adjust the parameters of the fault model based on the actual fault situation, making subsequent fault diagnosis more accurate.

[0032] IoT Remote Service Module: The device supports network connectivity and comes with a dedicated app. Technicians can use the app to remotely access the device's test data and operating status, enabling real-time fault diagnosis and analysis. If field operators encounter problems, technicians can provide remote guidance via the app to help resolve difficulties encountered during testing. Furthermore, the device can upload test data to an IoT platform for centralized data management and sharing. Experts in different locations can collaborate on cable fault diagnosis through the IoT platform, leveraging the expertise of all parties involved and improving the accuracy and efficiency of fault diagnosis.

[0033] Comprehensive Safety Protection Modules: The device is equipped with four safety monitoring modules, providing real-time monitoring of ground loop, step voltage, instrument temperature, and access key status. If any abnormality is detected, such as a ground loop fault, excessive step voltage, excessive instrument temperature, or an abnormal access key, the device automatically disconnects the high voltage and performs a discharge operation, fully safeguarding equipment and personnel safety. For example, if the step voltage exceeds the safety threshold, the device immediately activates a protective mechanism, disconnecting the high voltage to prevent electric shock to the tester and ensure safety during the test process.

[0034] 1. High resistance fault test

[0035] Wiring operation: The technician moves the integrated cable fault locator to the cable fault site and uses the matching cable connection cable to connect the device to the faulty cable according to the device's wiring markings. Ensure that the connection is secure and not loose.

[0036] Parameter setting: Based on experience, the cable fault is initially judged to be a high-resistance fault. On the device's operating interface, select the high-voltage, low-capacitance setting of the three-level capacitance adjustment function. Also, set other relevant test parameters, such as test frequency and pulse width.

[0037] Start the test: Press the start button to start the device. The fault locating power supply outputs high-voltage, low-capacitance surge energy in an attempt to break down the high-resistance fault point. During the test, the pulse generator emits multiple pulse signals, which propagate through the cable and reflect at the fault point.

[0038] Data Collection and Analysis: The device's sensors collect reflected pulse waveform data and transmit it to the AI Intelligent Waveform Analysis module. The module processes and compares the collected data and quickly calculates the fault distance based on pre-set high-resistance fault models and rules.

[0039] Fault Location and Report Generation: The AI-powered waveform analysis module displays the calculated fault distance on the device's display. Simultaneously, the device uploads the test data to the IoT platform via the network, generating a detailed test report including information such as fault type, fault distance, and test time. Technicians can remotely view the test results and report via the app for further analysis and processing.

[0040] Safety Monitoring and Protection: Throughout the test, four safety monitoring modules monitor the ground loop, step voltage, instrument temperature, and access key status in real time. If any abnormality occurs, such as a broken ground loop, excessive step voltage, or excessive instrument temperature, the device automatically disconnects the high voltage and initiates a discharge operation, ensuring the safety of both equipment and personnel.

[0041] 2. Low resistance fault test

[0042] Wiring and parameter setting: The technician connected the device to the faulty cable. Since it was judged to be a low-resistance fault, the technician selected the lower voltage and higher capacitance position of the three-level capacitance adjustment module on the device operation interface and set the corresponding test parameters.

[0043] Test process: After starting the test, the device outputs low-voltage, high-capacitance impulse energy to test for cable faults. The pulse generator operates multiple times to collect reflected waveform data.

[0044] Data Analysis and Fault Location: The AI-powered waveform analysis module analyzes and processes the collected waveform data, determines the fault distance based on the low-resistance fault model, and displays the results on the display. Simultaneously, the data is uploaded to the IoT platform to generate a test report.

[0045] Safety assurance: The safety monitoring module continuously monitors the operating status of the equipment. Once an abnormality is detected, the safety protection mechanism is immediately activated to cut off the high voltage and discharge it to ensure the safety of the test process.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated cable fault locating device, characterized by: It includes a fault locating power supply module, a resistance reduction and burn-through module, a ranging module, a three-speed capacitor adjustment module, an AI intelligent waveform analysis module, an Internet of Things communication module and a safety monitoring module. The fault locating power supply module, the resistance reduction and burn-through module and the ranging module are integrated into one by a one-time wiring method. The three-speed capacitor adjustment module changes the high-voltage capacitor wiring method by designing a capacitor conversion mechanism composed of a stationary disk and a rotating disk to select different capacitor gears according to the cable fault type. The resistance reduction and burn-through module monitors the resistance change of the faulty cable in real time during the process of converting a high-resistance fault into a low-resistance fault until the resistance reduction and burn-through are automatically stopped when the appropriate resistance is reached. The safety monitoring module monitors the grounding loop, step voltage, instrument temperature and authority key status in real time to realize the cutting off, discharging and recovery of the high-voltage power supply and simultaneously gives safety status prompt information to protect personnel safety.

2. The integrated cable fault location device according to claim 1, characterized in that: The three-stage capacitance adjustment module is based on the energy formula W=1 / 2CV 2 To adjust the capacitance and voltage, so that the output energy is stable at 2000J, where W represents the energy stored in the capacitor, C represents the capacitance of the capacitor, and V represents the voltage across the capacitor.

3. The integrated cable fault location device according to claim 2, characterized in that: The stationary disk of the capacitance conversion mechanism of the three-speed capacitance adjustment module is connected to the capacitor, and the rotating disk performs capacitance series and parallel adjustment.

4. The integrated cable fault location device according to claim 3, characterized in that: The three-stage capacitance adjustment module is provided with two stages: a high voltage and small capacitance stage and a low voltage and large capacitance stage.

5. The integrated cable fault location device according to claim 4, characterized in that: The AI intelligent waveform analysis module combines the principle of multiple pulse testing with a built-in artificial intelligence algorithm to automatically process and compare test waveform data and determine the fault distance.

6. The integrated cable fault locating device according to claim 5, characterized in that: The IoT communication module supports network connection, includes a supporting APP, and can upload test data to the IoT platform.

7. The integrated cable fault locating device according to claim 6, characterized in that: The Internet of Things platform is used to realize centralized management and sharing of test data.

8. The integrated cable fault location device according to claim 7, characterized in that: The artificial intelligence algorithm of the AI intelligent waveform analysis module has self-learning and optimization capabilities.

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