Suction type SF6 gas leakage monitoring method

Abstract

The invention provides a suction type SF6 gas leakage monitoring device and method. The device comprises an air outlet (1), an air inlet (2), an infrared light supply (3), a window piece I (4), a window piece II (5), a reference spectral filter (6), a measuring spectral filter (7), a dual channel infrared detector (8), a temperature probe(9), a signal conditioning module (10), an A / D (Analog / Digital) conversion module (11), a data processing module (12), a light source driving module (13), a device body (14), an end cover I (15) and an end cover II (16). The invention provides the suction type SF6 gas leakage monitoring device and method have the advantages that the suction type SF6 gas leakage monitoring device has a digital output and thermal compensation function and is simple and reliable, and the sensitivity is high. The method and the device can carry out ration monitoring on SF6 leaking so as to externally output a high-precision SF6 leaking concentration value, and the method and the device have the advantages that the monitoring accuracy is high, the method and the device are stable and reliable, the structure is compact, the volume is small and exquisite and the like.

Description

technical field [0001] The invention belongs to SF 6 In the field of gas leakage monitoring, it specifically involves high-precision suction SF with dual-wavelength infrared monitoring principle, built-in temperature compensation, and digital signal output 6 Gas leakage monitoring method and device. Background technique [0002] In power systems, SF 6 The gas is widely used because of its excellent insulating properties and arc extinguishing properties. But since SF 6 It is heavier than air, and once it leaks, it is easy to deposit at the bottom of the power switch room, causing hypoxia in the human body when people enter. and SF 6 Under the action of high temperature or electric arc, or when encountering moisture, it will decompose into a variety of toxic substances. Therefore, the "State Grid Corporation Electric Power Safety Work Regulations" clearly requires that SF 6 Equipment and places need to be monitored and inspected regularly, and a concentration of 1000ppm...

AI Technical Summary

Problems solved by technology

[0005] 1) Generally, an interference filter with a half-bandwidth of 250nm is used as the measurement filter. Due to the wide half-bandwidth, the relevant SF 6 The monitoring accuracy of the leakage monitoring system is low;

[0006] 2) Most of the output signals are analog signals, and there are deficiencies in realizing digital output, temperature compensation, eliminating the influence of light sources and environmental factors, etc., and the scope of use is greatly limited

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