Insulating gas inflating method for electrical equipment

Abstract

The invention discloses an insulating gas inflating method for electrical equipment. The method comprises the steps that 1, a cavity to be subjected to arc extinguishing or gas insulating tests of theelectrical equipment is vacuumized; 2, nitrogen is inflated into the cavity at a preset inflating speed, and standing is carried out for a first preset time; 3, the cavity is vacuumized; and 4, a kPaof first insulating gas is inflated into the cavity at a first inflating speed, and standing is carried out for a second preset time after inflating is finished, wherein the inflating sum amount of the first insulating gas is X kPa; 5, b kPa of first insulating gas is inflated into the cavity, the inflating speed at any time in the process of inflating b kPa of first insulating gas is lower thanthe first inflating speed, a is larger than b, and the sum of a and b is equal to X. The whole inflating process of insulating gas is safe and smooth.

Description

Technical field [0001] The present invention relates to the technical field of power equipment, in particular to an insulating gas charging method for power equipment. Background technique [0002] SF 6 (Sulfur hexafluoride) gas, as an insulating gas for power equipment, has excellent insulation and arc extinguishing performance, and has been widely used in power grid equipment. Traditional SF 6 Due to the high greenhouse effect and the toxic decomposition products of the gas, its use must be basically restricted in 2020 according to the requirements of climate change related agreements. Therefore, in recent years, relevant domestic and foreign institutions have imposed restrictions on SF 6 Intensive research has been carried out on alternative gases. SF 6 Alternative gas includes two types: partial replacement and complete replacement. Among them, partial replacement means the use of SF 6 Mixture of other gases, for example, SF 6 Gas mixed with nitrogen, or CF 3 I gas is mixed ...

AI Technical Summary

Problems solved by technology

[0003] At present, when filling insulating gas into electrical equipment, whether it is a mixed insulating gas or a single-medium insulating gas, it is directly inflated to the electrical equipment, and the entire inflation process is continuous and at a relatively constant inflation speed. To inflate, so that in the later stage of the inflation process, the insulating gas in the power equipment may collide violently due to the excessively fast and excessive inflation speed, which will make the inflation process unsafe. At the same time, due to the gas The fierce collision is also not conducive to the smooth progress of the inflation in the later stage

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