固体氧化物燃料电池传感器检测变压器油中溶解气体定量特性

发布时间：2018-04-11 07:56

本文选题：电力变压器 + 气相色谱　；参考：《电工技术学报》2017年21期

【摘要】：在线油色谱法是目前公认的发现变压器潜伏性故障的重要检测方法,对变压器运行状态的评估具有重要意义。气体传感器是在线色谱的关键技术。目前,国内外研制了许多油色谱在线监测传感器,但都存在灵敏度不高、线性范围难以满足要求等缺点,上述缺陷限制了在线色谱技术取代传统的离线检测技术。针对上述问题,提出一种固体氧化物燃料电池传感器检测变压器油中溶解气体的方法,介绍了传感器的制备方法、实验方法及步骤,并对油中气体的气敏响应机制进行探讨。在此基础上,基于Nernst方程构建传感器的定量数学模型。实验结果表明,固体氧化物燃料电池(SOFC)检测器技术及该文构建的模型能实现H_2、CH_4、C_2H_4、C_2H_6和C_2H_2的准确定量及高精度测量,对C_2H_2的灵敏度达到1×10~(-7),能较好地解决常规传感器及其定量方法稳定性差、准确性和灵敏度低等问题,具有重要的推广及应用价值。
[Abstract]:On-line oil chromatography is an important method for detecting latent faults of transformers, which is of great significance to the evaluation of transformer operation status.Gas sensor is the key technology of on-line chromatography.At present, many oil chromatographic on-line monitoring sensors have been developed at home and abroad, but all of them have some shortcomings, such as low sensitivity, and the linear range is difficult to meet the requirements. These defects limit the on-line chromatography technology to replace the traditional off-line detection technology.In order to solve the above problems, a method of detecting dissolved gas in transformer oil by solid oxide fuel cell sensor is presented. The preparation method, experimental method and step of sensor are introduced. The gas sensing response mechanism of oil is discussed.On this basis, the quantitative mathematical model of the sensor is constructed based on Nernst equation.The experimental results show that the solid oxide fuel cell detector technology and the model constructed in this paper can realize the accurate quantitative and high precision measurement of Hass _ 2CH4C _ 2C _ T _ 2H _ 2C _ 2H _ 2S _ 6 and C_2H_2.The sensitivity of C_2H_2 is 1 脳 10 ~ (10) ~ (-7), which can solve the problems of poor stability, accuracy and sensitivity of conventional sensors and their quantitative methods, and has important value of popularization and application.
【作者单位】：湖南大学电气与信息工程学院;
【基金】：国家自然科学基金(61102039) 教育部新世纪优秀人才支持计划(NCET-11-0130) 湖南省自然科学基金(14JJ7029)资助项目
【分类号】：TM41;TP212

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