环保绝缘介质C_(5)F_(10)O混合气体体积分数比定量检测  

Quantitative Detection on the Concentration of Eco-Friendly Insulating Medium C_(5)F_(10)O Gas Mixture Concentration

作　　者：李亚龙[1] 张晓星[1,2] 卫卓 王毅 李祎[1] 肖淞[1] Li Yalong;Zhang Xiaoxing;Wei Zhuo;Wang Yi;Li Yi;Xiao Song(School of Electrical Engineering and Automation Wuhan University,Wuhan 430072 China;Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment Hubei University of Technology,Wuhan 430068 China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072 [2]湖北工业大学新能源及电网装备安全监测湖北省工程研究中心,武汉430068

出　　处：《电工技术学报》2022年第8期2117-2125,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51977159);国家留学基金委(202006270108)资助项目。

摘　　要：C_(5)F_(10)O混合气体在中低压电压等级电气设备中替代SF_(6)气体作为绝缘介质具有很好的应用前景。因C_(5)F_(10)O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,C_(5)F_(10)O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C_(5)F_(10)O混合气体体积分数比的方法,实验发现,C_(5)F_(10)O气体在237~350nm波段有紫外吸收峰,峰值位于299nm处,通过对C_(5)F_(10)O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0.99998,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C_(5)F_(10)O混合气体以及在工程应用中实时在线监测C_(5)F_(10)O混合气体的体积分数比变化和监测环境中C_(5)F_(10)O的泄漏,为运维人员制定运维计划提供参考。C_(5)F_(10)O gas mixture shows a great application prospect as SF_(6) alternative gas in medium-voltage (MV) electrical equipment. The concentration of C_(5)F_(10)O plays an important role in the dielectric characteristics of its gas mixtures. However, most of C_(5)F_(10)O 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 C_(5)F_(10)O in gas mixtures based on the ultraviolet differential spectroscopy. It is found that C_(5)F_(10)O gas has an ultraviolet absorption peak in the 237~350nm band (with the peak located at 299nm). The absorption peak detection of C_(5)F_(10)O 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 C_(5)F_(10)O gas mixture with accurate concentration and monitoring the concentration change of C_(5)F_(10)O gas mixture in real time in engineering applications, and provide reference for operation and maintenance personnel to formulate operation and maintenance plans.

关 键 词：C_(5)F_(10)O混合气体 紫外吸收光谱法 道尔顿分压法 定量检测 SF_(6)替代气体 

分 类 号：TM213[一般工业技术—材料科学与工程]