Suction type SF6 gas leakage monitoring device and 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 the field of SF6 gas leakage monitoring, and specifically relates to a high-precision inhalation SF6 gas leakage monitoring method and device which adopts the dual-wavelength infrared monitoring principle, has temperature compensation, and has digital signal output. Background technique [0002] In the power system, SF6 gas is widely used because of its excellent insulation performance and arc extinguishing performance. However, because SF6 is heavier than air, 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 SF6 will be decomposed into a variety of toxic substances under the action of high temperature or electric arc, or when encountering moisture. Therefore, the "State Grid Corporation of China Electric Power Safety Work Regulations" clearly requires regular monitoring and inspection of SF6 equipment and places, and stipulates that the conce...

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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 monitoring accuracy of the relevant SF6 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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