Method for evaluating reliability state of lightning arrester under different air water contents

Abstract

A method for evaluating the reliability state of a lightning arrester under different air water contents is characterized by establishing a test platform, wherein the platform mainly comprises the lightning arrester, a working current intensity parameter tester, a test box, an air water content analysis control device, an air water content sensor and the like; carrying out lightning arrester reliability state test under different water vapor contents in the air, and controlling and measuring the water vapor content environment in the air where the lightning arrester is located by the air water content analysis control device in the test box through the upper computer; and then carrying out a lightning arrester working current intensity parameter measurement experiment to obtain a lightning arrester reliability coefficient expression under different water vapor contents in the air, establishing an evaluation model based on the theoretical error integral coefficient, and further evaluating the reliability state of the lightning arrester. According to the method, the reliability state of the lightning arrester can be effectively analyzed and evaluated under the condition that the moisture content of the lightning arrester in actual air is obtained, and safe and stable operation of the lightning arrester in an actual complex environment is facilitated.

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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