A method for evaluating the reliability status of arresters under different air moisture content

Abstract

A method for evaluating the reliability status of lightning arresters under different air moisture content, characterized in that a test platform is built, and the platform mainly includes lightning arresters, working current intensity parameter testers, test chambers, air moisture content analysis and control devices, and air moisture content sensors etc.; carry out the reliability state test of the arrester under different moisture content in the air, and control and measure the moisture content environment in the air where the arrester is located through the upper computer to analyze and control the moisture content of the air in the test chamber; then conduct the arrester operating current The intensity parameter measurement experiment obtained the expression of the reliability coefficient of the arrester under different water vapor contents in the air, and established an evaluation model based on the theoretical error integral coefficient, and then evaluated the reliability state of the arrester. The invention can effectively obtain the analytical evaluation of the reliability state of the lightning arrester under the condition of water vapor content in the actual air, and is beneficial to the safe and stable operation of the lightning arrester in the actual complex environment.

Description

technical field [0001] The invention relates to the field of lightning arrester performance testing, in particular to a method for evaluating the reliability state of lightning arresters under different air moisture contents. Background technique [0002] With the rapid progress of urbanization and industrialization, the scale of the power grid has also developed rapidly. In recent years, my country has built and put into operation a total of 24 UHV projects of "Thirteen Interchanges and Ten Directions", and the transmission and distribution grid continues to improve. Regional power grids With the continuous optimization of the structure and the synchronous advancement of power transmission and distribution-related technologies, the grid pattern of inter-regional AC-DC hybrid connection has been formed. However, many places in our country are in strong lightning areas. As an electrical appliance that protects electrical equipment from high transient overvoltage hazards and li...

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Problems solved by technology

[0003] At present, most of the relevant research on arresters at home and abroad is based on simulation or blackout tests, which cannot fully reflect the actual situation on site. Compared with blackout tests, online monitoring methods have the advantages of higher real-time and cost reduction; The working current intensity parameter will be affected by the moisture content in the environment. Under different moisture content conditions in the air, it will have different effects on the reliability of the arrester. At present, there is a lack of a method involving the reliability of the arrester under the condition of large water difference around it. State Test System and Analytical Evaluation Method

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