A multi-component mixed gas discharge characteristic analysis device based on different defect types

Abstract

The invention discloses a multi-component mixed gas discharge characteristic analysis device based on different defect types. The multi-component mixed gas discharge characteristic analysis device comprises a sealed experiment cavity, a multi-element gas supply device, a vacuumizing device, a high-voltage introduction electrode assembly for introducing high-voltage electricity, and a defect simulation electrode assembly arranged in the sealed experiment cavity in a replaceable manner; the defect simulation electrode assembly includes a tip simulation electrode assembly, a surface simulation electrode assembly, and at least one of a composite tip simulation electrode assembly and a superimposed simulation electrode assembly of the surface simulation electrode assembly. According to the multi-component mixed gas discharge characteristic analysis experiment device based on different defect types, the device can simulate the condition that the gas-insulated power equipment has different types of discharge faults in a laboratory environment, can introduce gas dielectrics with different components, and carries out the electrical and optical method analysis of discharge characteristics, thereby providing a corresponding experiment basis for the improvement of the protection technology and discharge fault analysis method of the gas-insulated power equipment.

Description

technical field [0001] The invention belongs to the technical field of power equipment protection and fault analysis, and in particular relates to a discharge characteristic analysis device for multi-element mixed gas based on different defect types. Background technique [0002] SF 6 Gas has high dielectric strength and high stability, and is widely used in gas-insulated power equipment such as GIS and GIL. However, SF 6 It is a greenhouse gas that will cause great harm to the natural environment, and its global warming potential (GWP) is CO 2 23900 times. SF 6 The high liquefaction temperature limits its application in alpine regions, and SF 6 The cost of gas is high, so it is not suitable for power equipment with large gas consumption. In recent decades, SF 6 The research on alternative gases has attracted extensive attention from domestic and foreign scholars, and the alternative gases involved are mainly divided into three categories: the first category is conven...

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Problems solved by technology

[0005] Chinese Patent Application Announcement No. CN 106684708A discloses a kind of SF 6 The spark discharge device discloses a device that can control the frequency of spark discharge and the energy of a single spark discharge, but the simulated discharge defect of this structure is a single discharge defect, which only involves the needle-plate electrode structure, and the gas medium it uses is Single gas, poor versatility

[0006] Chinese Patent Application Publication No. CN 108931573A discloses an experimental device for simulating sulfur hexafluoride / nitrogen decomposition products, and discloses an experiment for simulating sulfur hexafluoride / nitrogen decomposition products for different discharge types and discharge conditions device, but its simulated discharge defect mainly considers the partial discharge that only the gas medium participates in, and does not consider the creeping discharge defect that the solid medium participates in, and the gas medium is only SF 6 / N 2 binary gas mixture

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