Temperature distribution calculation method and system suitable for zinc oxide arrester

Abstract

The invention provides a temperature distribution calculation method and system suitable for a zinc oxide arrester. According to the invention, sunlight radiation and wind speed are converted into corresponding boundary conditions to be applied to the temperature field simulation model; therefore, the temperature distribution rule of the extra-high voltage lightning arrester under the influence ofexternal environmental factors can be researched and analyzed without a temperature rise test with a long period and a large error, and technical support is provided for infrared temperature measurement and fault diagnosis of the lightning arrester.

Description

technical field [0001] The disclosure belongs to the field of high-voltage equipment state detection, and relates to a temperature distribution calculation method and system suitable for zinc oxide arresters. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Zinc oxide surge arresters are important overvoltage protection equipment in UHV substations, and are generally installed on the main transformer and line outlet side of GIS. When the internal resistance sheet of the arrester is damp, deteriorated, etc., it will lead to changes in the surface temperature characteristics, so that the operation status of the UHV arrester can be diagnosed by means of infrared temperature measurement. [0004] However, the arrester is a voltage-induced heating device, which has the characteristics of small heat generation and low surface temperature rise, ...

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Problems solved by technology

[0004] However, the arrester is a voltage-induced heating device, which has the characteristics of small heat generation and low surface temperature rise, and its surface temperature is also affected by external environmental factors, such as light intensity, wind force, etc., which will inevitably give infrared temperature measurement and fault diagnosis If you wait for suitable environmental conditions, the work efficiency will be reduced, and even the defects cannot be found in time. Therefore, it is necessary to study the internal and external temperature distribution characteristics of UHV arresters under the influence of external environmental factors.

[0005] The traditional surge arrester temperature rise test is usually carried out in the test hall, the test period is long, there are many error factors, and it is impossible to truly simulate the outdoor field operating environment. If the simulation software can be used to establish a surge arrester temperature field that takes into account wind speed, sunlight and other factors The calculation model can quickly and accurately conduct research and analysis on the internal and external temperature distribution of the arrester under the influence of external environmental factors

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