Visual detection method for assembling defects in metal oxide arrester for electric power

Abstract

The invention relates to a visual detection method for the assembling defects in a metal oxide arrester for electric power. In the visual detection method provided by the invention, a means that the electric measurement and the waveform observation are taken to be principal and the X-ray perspective radiation is taken to be auxiliary is adopted to realize the rapid diagnosis of the assembling defects in the metal oxide arrester for the electric power; the two ends of a discharge counter which is provided with an electric arrester are used for monitoring the voltage waveform through a common oscilloscope, and if the voltage waveform contains high-frequency and high-amplitude noise waves, the metallic suspended particle defect exists in the arrester; and by virtue of an X-ray perspective radiation means, the main point is that the visual expression of the structure feature in the arrester can be realized near the bottom of a single-section arrester, thereby directly determining that the defect exists in the arrester. The visual detection method provided by the invention mainly integrates an electric detection means and an X-ray perspective radiation technique to realize the rapid positioning and determination of the assembling defects in the metal oxide arrester for the electric power, and has the obvious advantages of concise structure, high efficiency, defect shape visualization and the like.

Description

technical field [0001] The invention belongs to the category of detection methods for assembly defects of electrical equipment in electric power systems, and is particularly suitable for the technical field of detection of internal assembly defects of metal oxide arresters during live operation. Background technique [0002] Surge arresters are used in power systems mainly to suppress lightning or operating overvoltage to control the stability of power system voltage. With the development of technology, the application range of metal oxide arresters has gradually expanded and finally become the mainstream type of arrester selection in power systems. Generally, this type of arrester is assembled by stacking metal oxide valve plates. For arresters with a voltage level of 110kV and above, parallel capacitors will be installed for voltage equalization; further, in order to suppress the occurrence of high-voltage partial discharge, conventional insulating porcelain bottles Or th...

AI Technical Summary

Problems solved by technology

However, due to various practical problems such as the large amount of lightning arresters operating in the system, the rapid economic development and the lack of opportunities for equipment power outages, this type of detection method is not easy to use in practice.

In addition, there are still some misplaced parts in practice, but the electrical connection is good, and it is difficult or impossible to detect through various types of electrical detection methods.

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