环保绝缘介质C5F10O混合气体体积分数比定量检测

doi:10.19595/j.cnki.1000-6753.tces.201160

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摘要 C₅F₁₀O混合气体在中低压电压等级电气设备中替代SF₆气体作为绝缘介质具有很好的应用前景。因C₅F₁₀O的体积分数比对其混合气体的电气性能起到决定性作用,而已有的研究中,C₅F₁₀O混合气体大多是采用道尔顿分压法配制,存在配气误差无法确定的问题。该文基于紫外差分光谱法提出快速准确的定量检测C₅F₁₀O混合气体体积分数比的方法,实验发现,C₅F₁₀O气体在237~350nm波段有紫外吸收峰,峰值位于299nm处,通过对C₅F₁₀O气体的吸收峰进行检测,标准气体的体积分数比反演曲线线性确定系数高达0.999 98,检测绝对误差小于0.05%,理论检测下限低至200×10^-6。该文的研究成果可用于指导配制体积分数比更加精确的C₅F₁₀O混合气体以及在工程应用中实时在线监测C₅F₁₀O混合气体的体积分数比变化和监测环境中C₅F₁₀O的泄漏,为运维人员制定运维计划提供参考。

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	李亚龙
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关键词 ： C₅F₁₀O混合气体, 紫外吸收光谱法, 道尔顿分压法, 定量检测, SF₆替代气体

Abstract：C₅F₁₀O gas mixture shows a great application prospect as SF₆ alternative gas in medium-voltage (MV) electrical equipment. The concentration of C₅F₁₀O plays an important role in the dielectric characteristics of its gas mixtures. However, most of C₅F₁₀O gas mixtures in existing studies are prepared by Dalton's law, and the gas concentration error cannot be determined accurately. This paper proposed a rapid and accurate method for quantitatively detecting the concentration of C₅F₁₀O in gas mixtures based on the ultraviolet differential spectroscopy. It is found that C₅F₁₀O gas has an ultraviolet absorption peak in the 237~350nm band (with the peak located at 299nm). The absorption peak detection of C₅F₁₀O shows that the linear determination coefficient of the standard gas concentration inversion curve reaches 0.999 98, the absolute detection error is less than 0.05%, and the theoretical detection limit is 200ppm. This paper can provide guidance for the preparation of C₅F₁₀O gas mixture with accurate concentration and monitoring the concentration change of C₅F₁₀O gas mixture in real time in engineering applications, and provide reference for operation and maintenance personnel to formulate operation and maintenance plans.

Key words： C₅F₁₀O gas mixture ultraviolet (UV) absorption spectrometry Dalton's law quantitative detection SF₆ alternative gas

收稿日期: 2020-09-06

PACS:

TM213

基金资助:国家自然科学基金（51977159）和国家留学基金委（202006270108）资助项目

通讯作者: 张晓星男,1972年生,教授,博士生导师,研究方向为电气设备在线监测与故障诊断、绝缘状态评估、新型传感器技术以及SF₆替代气体等。E-mail: xiaoxingzhang@whu.edu.cn

作者简介: 李亚龙男,1989年生,博士研究生,研究方向为气体绝缘电气设备在线监测、SF6环保替代气体、气体放电等离子体等。E-mail: yalongli1122@whu.edu.cn

引用本文:

李亚龙, 张晓星, 卫卓, 王毅, 李祎, 肖淞. 环保绝缘介质C₅F₁₀O混合气体体积分数比定量检测[J]. 电工技术学报, 2022, 37(8): 2117-2125. Li Yalong, Zhang Xiaoxing, Wei Zhuo, Wang Yi, Li Yi, Xiao Song. Quantitative Detection on the Concentration of Eco-Friendly Insulating Medium C₅F₁₀O Gas Mixture Concentration. Transactions of China Electrotechnical Society, 2022, 37(8): 2117-2125.

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