Long-distance GIL arc discharge fault locating method and long-distance GIL arc discharge fault locating device

Abstract

The invention discloses a long-distance GIL arc discharge fault locating method and a long-distance GIL arc discharge fault locating device. The method comprises the following steps: receiving a soundwave signal and converting the sound wave signal into a sound wave digital electric signal; according to the sound wave digital signal, calculating short-time energy of each microphone flag frame, determining M microphone positions closest to a sound source; determining time difference between any two of the M microphones, and determining a fault point position according to distance between the sound source and the microphone. The method and the device provided by the invention solve problems of high consumption of labor force, poor locating accuracy and failure of usage in long-term online monitoring of an artificial process, overcome defects of an ultrasonic method and an ultrahigh frequency method, such as high need of microphones, complex system composition, high workload of mountingand maintenance, liable to be affected by electromagnetic interference, relatively poor locating reliability and relatively high equipment cost, and realize fast locating for fault points through monitoring and analyzing an audible sound signal generated by GIL internal arc discharge.

Description

technical field [0001] The present invention relates to the technical field of fault location of power transmission equipment, more specifically, to a long-distance GIL arc discharge fault location method and device. Background technique [0002] GIL (Gas-insulated Metal-enclosed Transmission Line) is a gas-insulated metal-enclosed transmission line. It is a high-voltage, high-current, long-distance transmission line that uses sulfur hexafluoride (SF6) or other gas insulation, and the shell and conductor are arranged coaxially. Power transmission equipment has significant advantages such as large transmission capacity, small loss, less land occupation, high operational reliability, small maintenance, long life, and small environmental impact. It is especially suitable for overhead power transmission or limited cable power transmission. Complementary transmission technology. [0003] All aspects of GIL manufacturing, transportation, and on-site assembly may cause insulation ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the artificial method in the background technology needs a lot of manpower, the positioning accuracy is low, and the ultrasonic method and the UHF method need to use more microphones, the system structure is complex, the installation and maintenance workload is large, it is easily affected by electromagnetic interference, and the positioning reliability Poor, high equipment cost and other problems, the present invention provides a long-distance GIL arc discharge fault location method and device, the method comprising:

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