Plasma spectral measurement device and method for SF6 mixed gas

Abstract

The invention discloses a plasma spectral measurement device and method for SF6 mixed gas. The device is composed of an SF6 mixed gas charging, discharging and recycling device, an SF6 mixed gas arc plasma generation device and a spectrum detection device. The SF6 mixed gas charging, discharging and recycling device comprises two high-pressure gas cylinders used for storing SF6 gas and another kind of gas respectively, a mixed gas storage tank, a compressor, a filtration and absorption device, a vacuum pump and gas connecting pipelines. The SF6 mixed gas arc plasma generation device comprises two electrodes, a sealed gas chamber, a voltage regulator, a transformer, a water resistor and a connecting line. The method includes the following process steps that firstly, the mixed gas storage tank is vacuumized; secondly, the SF6 gas and the other kind of gas are fully mixed in the mixed gas storage tank; thirdly, the sealed gas chamber is vacuumized, and then the mixed gas is charged into the sealed gas chamber to a preset pressure intensity value; fourthly, loop voltage is regulated, and arc plasma is formed; fifthly, spectral information of the arc plasma is collected.

Description

technical field [0001] The invention belongs to the technical field of high voltage electric test, in particular to a SF 6 Mixed gas plasma spectrometry device and method. Background technique [0002] With the rapid development of the national economy, the power industry has been promoted to the direction of large units, long-distance, ultra-high voltage and AC-DC combined use. With the improvement of the transmission voltage level of the power grid, higher requirements are put forward for the insulation of power equipment. . SF 6 Gases are widely used in the power industry because of their high insulation and arc extinguishing capabilities. Meanwhile, SF 6 The gas also has the following defects: first, the liquefaction temperature is high, and it is easy to liquefy when used in the cold winter season in the alpine region, which poses a serious threat to the safe operation of power equipment; second, SF 6 The gas is a very strong greenhouse gas, and its GWP value is th...

AI Technical Summary

Problems solved by technology

Meanwhile, SF 6 The gas also has the following defects: first, the liquefaction temperature is high, and it is easy to liquefy when used in the cold winter season in the alpine region, which poses a serious threat to the safe operation of power equipment; second, SF 6 The gas is a very strong greenhouse gas, and its GWP value is the equivalent of CO 2 23,900 times that of the Kyoto Protocol adopted in 1997, the SF 6 The gas is listed as a gas that requires global control; the third is that it is sensitive to the unevenness of the electric field in the power equipment; the fourth is that it will decompose under the continuous action of the high-temperature arc

However, it has not yet found an effective substitute for SF 6 A single insulating gas with excellent gas properties, so people began to seek the use of SF 6 The mixed gas is used as an insulating and arc-extinguishing medium, which can not only reduce the liquefaction temperature of the insulating gas, but also reduce the SF 6 Gas usage

[0003] About SF at this stage 6 The research of mixed gas mainly focuses on its macroscopic aspects such as low voltage level, steady-state breakdown characteristics and dielectric strength. 6 There are few studies on the discharge mechanism of mixed gas

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