Underground comprehensive pipe gallery cable fault detection and positioning system and method based on Hilbert-Huang transformation
A cable fault and integrated pipe gallery technology, applied in the fault location, detecting faults by conductor type, and using pulse reflection method to detect faults, etc. Effect
Pending Publication Date: 2020-12-29
JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology
[0003] The commonly used cable fault location method is often to adopt power failure inspection, which is time-consuming and labor-intensive. If the cable fault type and fault location can be judged according to the transient signal characteristics of the cable fault, the speed and accuracy of fault detection can be greatly improved, reducing Power outage time is of great significance to operation and maintenance
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[0051] Such as figure 2 and image 3 As shown, a Hilbert-Huang transform-based cable fault detection and location system for underground utility tunnels, the system includes a cable current sensor 3, a sheath circulation sensor 4, a sheath voltage sensor 5, a data processing device, and a lower computer processor 1 , the computer system in the central control room, the wireless transmission device 2, the automatic cable cutting device 7 and the operating status display screen;
[0052] The cable current sensor 3, the sheath circulation sensor 4 and the sheath voltage sensor 5 are used to detect the real-time status of the cable operation and obtain a status signal. The data processing device is a data processing unit module 6, and the data processing unit module 6 is used to process the status signal. Preprocess and obtain the preprocessed signal, the lower computer processor 1 is used to finely process the preprocessed signal and obtain the finely processed signal, the comput...
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The invention relates to an underground comprehensive pipe gallery cable fault detection and positioning system and method based on Hilbert-Huang transformation, and belongs to the field of cable detection. The system comprises a cable current sensor, a sheath circulation sensor, a sheath voltage sensor, a data processing device, a lower computer processor, a central control room computer system,a wireless transmission device, a cable automatic cutting device and an operation state display screen. According to the invention, the alpha-mode component of the transient quantity of the three-phase current is extracted through Clark transformation, and a wavelet transformation extreme point is obtained according to a Hilbert-Huang transformation method in wavelet transformation to capture thefault moment; accurate positioning of the fault point can be completed by combining a traveling wave ranging principle, the position of the fault point is locked within a certain range, a fault section cable is cut off, then operation maintenance personnel carry out a low-voltage pulse reflection experiment on the cable within the range near the fault position to find out the accurate position ofthe fault point, the fault is eliminated in time, and the system is recovered to be stable.
Description
technical field [0001] The invention relates to a Hilbert-Huang transformation-based cable fault detection and positioning system and method for an underground comprehensive utility gallery, belonging to the technical field of cable detection. Background technique [0002] In recent years, urban underground comprehensive pipe gallery has been highly valued by people. It not only saves land and is beautiful, but also avoids frequent excavation of roads when laying and maintaining underground pipelines, reducing the impact on traffic and residents' travel and construction costs. With the continuous development of the city, more and more cables are laid in the underground comprehensive utility gallery, and the cables are getting longer and longer. Cables inevitably fail during operation. Since they are buried underground, it is difficult to detect the location of the fault point quickly, delaying the repair time, and causing adverse effects on the production of industrial and m...
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IPC IPC(8): G01R31/08G01R31/11
CPCG01R31/083G01R31/11Y04S10/52
Inventor 韩宇泽沈培锋周平王东海赵轩胡彬彬黄磊
Owner JIANGSU ELECTRIC POWER CO