Ultrahigh voltage transmission lines hardware corona test method based on ultraviolet imagery technology

Abstract

An extra high voltage transmission line hardware corona test method based on the ultraviolet imaging technology is characterized in that: an ultraviolet imaging apparatus working in a wave band from 240nm to 280nm is adopted to shoot at a horizontal distance of 10-20 meters from a tested object; the voltage is applied according to GB / T2317.2-2000 Corona and RIV tests for electric power fittings, and the voltage applied on a sample is gradually increased during the test until the sample corona is produced and kept for 4-6 minutes, and the voltage is recorded as a corona starting voltage; then the voltage applied on the sample is gradually reduced until the corona on the sample disappears, the state is kept for 4-6 minutes, and the voltage is recorded as a corona extinction voltage; the steps are repeated for a plurality of times, and the average values are respectively taken as the corona starting voltage and the corona extinction voltage of the tested object. The extra high voltage line hardware corona test method which can effectively observe the corona of the extra high voltage transmission line and hardware with the results capable of guiding the pattern selection and design of extra high voltage hardware has great engineering application significance and economic value.

Description

technical field [0001] The present invention is applied to the design of UHV transmission lines in my country, guides the design and selection of uniform rings in UHV test bases and test demonstration projects in my country, and is useful for reducing radio interference and audible noise produced by UHV transmission lines and fittings due to corona discharge etc. It has great engineering application significance and economic value. Background technique [0002] Due to the increase in voltage level of UHV transmission lines, the noise and radio interference generated by corona and the voltage distribution of insulator strings are more prominent. Improve the electric field distribution of the insulator string to meet the engineering needs. [0003] The grading ring can improve the voltage distribution of the insulator string, and has a good uniform effect, because on the one hand, after the grading ring is installed, the power line on the surface of the insulator is more perpe...

AI Technical Summary

Problems solved by technology

The results obtained by different measurement methods are quite different, that is, the measurement results of different people and different observation positions of the same measurement method will be different; due to the influence of environmental conditions, there may also be large differences in the results of different time measurements. The testing method of the experiment will directly affect the results of the research

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