Experimental device and method based on characteristic study of metal particle movvement

Abstract

The invention provides an experimental device and a method based on characteristic study of metal particle movvement. The experimental device comprises a sealing air chamber and an electrode module, wherein the electrode module is arranged in the sealing air chamber, and consists of an upper electrode plate and a lower electrode plate; the upper electrode plate is connected with a high-voltage power source through a protection resistor, and the lower electrode plate is connected with an outer casing of the sealing air chamber; the outer casing is grounded. The method comprises the following steps of checking whether the equipment of each part is complete or not; placing the metal particles between the upper electrode plate and the lower electrode plate; filling air into the sealing air chamber to the required pressure; adjusting the distance between the two electrode plates, engaging the high-pressure power source, and increasing the voltage until the metal particles are moved; observing whether the metal particles can bounce onto the upper electrode of the electrode module or not; when the metal particles cannot bounce onto the upper electrode, adjusting the distance between the upper electrode plate and the lower electrode plate until the metal particles can bounce onto the upper electrode plate; when the metal particles are moved to the rightmost side of the upper electrodeplate, finishing the experiment. The experimental device has the advantages that the influence by the air environment is avoided, the device can work under any air environment, and the problem of synchronizing of image signal acquistion at two directions is solved.

Description

technical field [0001] The invention relates to the technical field of high-voltage transmission lines and insulation, in particular to an experimental device and method based on the research on the motion characteristics of metal particles. Background technique [0002] GIS / GIL equipment has been applied since the 1960s and 1970s and has been widely used all over the world, and has great application prospects in the fields of UHV power transmission and offshore large-scale wind power transmission. However, GIS / GIL will produce some metal debris or particles during transportation, assembly, and operation. According to the statistics of reliable operation, most of the faults inside electrical equipment are caused by metal particles in electrical equipment. Free conductive particles Existence will cause SF 6 Dielectric strength drops up to more than 80%. The metal particles move freely in the insulating cavity, and the resulting electric field distortion will bring a series ...

AI Technical Summary

Problems solved by technology

However, GIS / GIL will produce some metal debris or particles during transportation, assembly, and operation. According to the statistics of reliable operation, most of the faults inside electrical equipment are caused by metal particles in electrical equipment. Free conductive particles Existence will cause SF 6 Dielectric strength drops up to more than 80%

The metal particles move freely in the insulating cavity, and the resulting electric field distortion will bring a series of insulation problems: 1. The maximum and minimum values ​​of the electric field strength are at the fixed particles, and the field strength distortion near the metal particles is easy to cause The gas around the particles decomposes; 2. The free metal particles may roll or jump under the action of the electric field environment, and its movement is largely random, which increases the difficulty of detection and prevention; 3. Attached metal particles The insulator's flashover along the surface deteriorates the dielectric strength of GIS / GIL more seriously than the case of air gap breakdown

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