Partial discharge signal direction-finding method based on circular ultrahigh-frequency sensor array
A technology of UHF sensor and discharge signal, which is applied in the field of direction finding, can solve the problems of high hardware requirements and difference in arrival time of electromagnetic waves, etc., and achieve the effect of low hardware requirements, ingenious conception and good application prospects
Active Publication Date: 2019-06-28
STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY +2
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[0003] At present, partial discharge is one of the important reasons for equipment failure. In recent years, the monitoring and positioning of partial discharge in open substation space has received some attention and research. The existing UHF partial discharge space positioning technology is mainly Based on the arrival time difference of electromagnetic waves, however, the prior art method requires very high time synchronization accuracy and sampling rate, which will result in extremely high hardware requirements
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[0037] The method and system for finding the direction of partial discharge signals based on a circular UHF sensor array according to the present invention will be further described according to specific embodiments and accompanying drawings, but this description does not constitute an improper limitation to the technical solution of the present invention.
[0038] figure 1 It is a structural schematic diagram of a partial discharge signal direction finding system based on a circular UHF sensor array in some embodiments of the present invention.
[0039] Such as figure 1 As shown, the partial discharge signal direction finding system based on the circular UHF sensor array includes N UHF sensors S uniformly arranged on the circumference of a circle 1 , S 2 , S 3 …S N And a signal acquisition and processing device connected with each UHF sensor data.
[0040] For the specific structure of the UHF sensor, please refer to Figure 2 to Figure 3 . in, figure 2 From a certai...
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The invention discloses a partial discharge signal direction-finding method based on a circular ultrahigh-frequency sensor array. The method comprises the steps: arranging a plurality of ultrahigh-frequency sensors uniformly on the circumference of a circle to form a circular ultrahigh-frequency a sensor array; receiving ultrahigh-frequency partial discharge signals simultaneously by using the plurality of ultrahigh-frequency sensors; searching for an extreme value in the received ultrahigh-frequency partial discharge signals; and determining the direction of the ultrahigh-frequency partial discharge signal based on the angle of collecting the extreme value of the ultrahigh-frequency sensor. In addition, the invention also discloses a partial discharge signal direction-finding system basedon a circular ultrahigh-frequency sensor array. The system includes a circular ultrahigh-frequency sensor array formed by a plurality of ultrahigh-frequency sensors uniformly arranged on the circumference of a circle and a signal acquisition and processing device in data connection to the ultrahigh-frequency sensors. The disclosed method being simple is easy to implement; and the orientation of the partial discharge signal generation can be obtained rapidly and accurately.
Description
technical field [0001] The invention relates to a direction finding method and system, in particular to a partial discharge signal direction finding method and system. Background technique [0002] In the electric power industry, the status inspection and diagnosis of electric equipment can improve the efficiency of maintenance, effectively discover potential hidden dangers of equipment, and detect power failures in time, thereby effectively avoiding major accidents. [0003] At present, partial discharge is one of the important reasons for equipment failure. In recent years, the monitoring and positioning of partial discharge in open substation space has received some attention and research. The existing UHF partial discharge space positioning technology is mainly Based on the arrival time difference of electromagnetic waves, however, the methods in the prior art require very high time synchronization accuracy and sampling rate, which will result in extremely high requireme...
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IPC IPC(8): G01R31/12
Inventor 任力孙兴华李鹏王晓梅贾廷波郑楠孙安青金昌峰卢洋肖笋秦昊
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY