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基于双向自我校正技术的光学传感系统:在气体绝缘开关装置中对二硫化碳和二氧化硫的在线检测方法

Jie Gao^1,2, Yucun Zhang¹, Rui Zhu¹

¹School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.

Analytical chemistry

|March 29, 2025

概括

一个新的光学传感系统可以准确地检测气体绝缘开关装置中的二硫化碳 (CS) 和二氧化硫 (SO). 该系统使用双向自纠正技术,精确地在线监测这些关键故障指示气体.

科学领域:

* 分析化学分析化学
* 光谱学是一种光谱学.
* 环境监测 * 环境监测

背景情况:

*气体隔热开关装置 (GIS) 需要早期检测故障.
*二硫化碳 (CS) 和二氧化硫 (SO) 是GIS故障的主要指标气体.
*现有的检测方法面临的挑战是光谱重叠和准确性.

研究的目的:

* 开发一个光学传感系统,在线检测CS和SO.
* 实施一种新的双向自我校正技术 (BSCT) 用于光谱解.
*为了在GIS中实现CS₂和SO₂的高精度和低检测极限.

主要方法:

*使用了195-230nm范围内的紫外差光学吸收光谱学 (UV-DOAS).
* 开发并应用双向自我校正技术 (BSCT) 来解重叠的光谱.
* 采用光谱重建和最小正方形建模用于定量分析.

主要成果:

*获得的平均绝对百分比误差为CS₂的0.543%和SO₂的0.521%.
*在50厘米光学距离下,CS₂的最低检测极限为0.5ppb,SO₂的最低检测极限为12ppb.
*通过将结果与单元标准气体进行比较,验证了BSCT技术.

结论:

*使用BSCT开发的光学传感系统在混合气体环境中有效检测CS和SO.
* 该系统为在线监控GIS故障提供了高精度和灵敏度.
* 这代表了在线检测CS₂和SO₂在ppb-ppm范围内的重大进展.

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