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Composite insulator fatigue degree evaluation method based on video difference analysis

A technology of composite insulators and difference analysis, applied in the testing of machines/structural components, measuring devices, instruments, etc.

Active Publication Date: 2017-11-21
西安金源电气股份有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for evaluating the fatigue degree of composite insulators based on video difference analysis, which solves the problem of the measurement method of the deformation of composite insulators operating under strong winds that has not been involved in the prior art, and is useful for the rubber materials that make up composite insulators. Quantitative evaluation of the fatigue degree lays a good foundation for the evaluation of the fault state of the entire string of composite insulators

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  • Composite insulator fatigue degree evaluation method based on video difference analysis
  • Composite insulator fatigue degree evaluation method based on video difference analysis
  • Composite insulator fatigue degree evaluation method based on video difference analysis

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Embodiment Construction

[0066] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0067] A method for evaluating the fatigue degree of composite insulators based on video difference analysis, specifically implemented according to the following steps:

[0068] Step 1, collect video images and wind speed waveforms. The specific method is: through the calibrated 100Hz fixed-focus high-speed camera with pan-tilt and wind speed sensor installed on the site iron tower to obtain the real-time vibration video and wind speed waveform of the composite insulator under strong wind, according to For the mainstream wind direction in the strong wind area, install a calibrated fixed-focus high-speed camera with a pan-tilt and a wind speed sensor at the corresponding position of the iron tower where the composite insulator is located. Since the natural frequency of the composite insulator used in the UHV transmission line in the strong wind a...

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Abstract

The invention discloses a composite insulator fatigue degree evaluation method based on video difference analysis. First a video image and a wind speed waveform are collected, and then graying processing is performed on each frame of image in an obtained composite insulator vibration video, thereby obtaining a gray scale image P(t); edge extraction is performed on the obtained gray scale image P(t), two transverse left convex angle point coordinates of an edge curve are obtained, then a deformation quantity e(t)=[eta]d(t)f<1> of the composite insulator in unit time at the moment t is calculated, and according to the collected video, a primitive function of a sine curve is obtained, and a vibration sine curve waveform e(t) of the composite insulator under strong wind is obtained; and finally, an evaluation parameter alpha of the composite insulator fatigue degree is calculated. The problem of a method for measuring the deformation quantity of a composite insulator running in strong wind that the prior art does not involve is solved, and a quantitative evaluation of the fatigue degree of a rubber material forming the composite insulator is made, thereby laying a good foundation for evaluation of the failure state of the whole composite insulator.

Description

technical field [0001] The invention belongs to the technical field of electric equipment monitoring, and relates to a method for evaluating the fatigue degree of composite insulators based on video difference analysis. Background technique [0002] With the research and progress of composite insulator-related technologies, the construction and development of UHV transmission lines in my country have been continuously improved, and the manufacturing process, materials, test methods, aging problems, mechanical properties, brittle fracture, and shed structure of composite insulators have been studied. Research has always been the focus in the field of high-voltage insulation, and the shed damage of composite insulators is a new problem under strong wind disasters, which has not yet been targeted in IEC and national standards. Because the shed of the composite insulator on the transmission line will be deformed under strong wind, the deformation will lead to stress concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/00
Inventor 黄新波刘新慧张烨朱永灿张慧莹邢晓强杨璐雅刘成郑心心
Owner 西安金源电气股份有限公司
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