基于光声光谱技术的SF_6泄露检测技术

SF6气体作为一种优良的绝缘介质,广泛应用于高压电力设备中。然而,作为一种主要的温室效应气体,其泄露将给环境和维修人员构成不良影响。能够及时灵敏地检测到SF6气体的泄露情况成为电力系统的一个广泛需求。光声光谱技术作为近年来兴起的一项新型的微量气体检测技术,具有灵敏度好,选择性好,动态检测范围大等优点。笔者基于光声光谱技术的基本原理,利用SF6在10.6微米波长处的红外吸收峰值,构建出一套SF6泄露检测系统。同时通过实验室模拟配比不同浓度SF6和空气的混合气体,对系统性能进行验证,发现该系统最低可检测到0.01 ppm的SF6,而且具有较好的线性度和稳定性。

Leakage Detection of SF6 Based on Photoacoustic Spectroscopy

SF6 is widely used in high voltage power equipments as a nice insulating dielectric.However,as a major green house gas,the leakage will definitely cause danger to the people and environment.,as a state-of-the-art technology,has the advantage of high sensitivity,selectivity and dynamic range.This paper utilizes photoacoustic spectroscopy technology to design an SF6 leakage detection system at the wave length of 10.6 micrometer of IR source.The blends of air and different concentrations of SF6 are detected by the system to verify its accuracy.The result shows that the system can detect the lowest 0.01ppm SF6 gas with good linearity and stability.