基于频率锁定吸收光谱技术的变压器故障特征气体检测研究

发布时间：2018-07-01 12:09

  本文选题：油中溶解气体分析 + H吸收谱线　； 参考：《中国电机工程学报》2017年18期

【摘要】：高准确度、高灵敏度检测故障特征气体是基于油中溶解气体分析的变压器早期潜伏性故障诊断的关键。该文开展了基于频率锁定吸收光谱技术的变压器故障特征气体检测研究。基于电四极跃迁理论,论证了H_2等同核双原子分子同样存在吸收效应;为提高H_2最小浓度的检测极限,搭建了频率锁定腔增强吸收光谱气体检测平台,首次实现了基于吸收光谱技术的变压器故障特征气体H_2的定性与定量检测分析,检测准确度与重复性分别达到约93.82%及94.35%。腔内气体压强为101k Pa时,H_2最小检测浓度的实验值约为7.5μL/L,与计算值的相对偏差仅为3.8%。此外,基于激光器阵列技术,实现了其他6种变压器故障特征混合气体CO、CO2、CH_4、C_2H_2、C_2H_4与C_2H_6的吸收光谱检测,其检测准确度与最小检测浓度同样满足变压器油中溶解气体分析的需求。该研究为研制基于频率锁定吸收光谱技术的变压器故障特征气体现场检测系统提供了理论依据和技术支撑。
[Abstract]:Detection of fault characteristic gas with high accuracy and sensitivity is the key to early latent fault diagnosis of transformer based on dissolved gas analysis in oil. In this paper, the fault gas detection of transformer based on frequency locking absorption spectrum is studied. Based on the theory of electric quadrupole transition, it is proved that the absorption effect also exists in the equivalent nuclear diatomic molecules. In order to increase the detection limit of the minimum concentration of H _ s _ 2, a frequency-locked cavity enhanced absorption spectrum gas detection platform is built. For the first time, the qualitative and quantitative detection and analysis of transformer fault characteristic gas H _ s _ 2 based on absorption spectrum technology are realized. The detection accuracy and repeatability are about 93.82% and 94.35% respectively. When the gas pressure in the cavity is 101 KPA, the experimental value of the minimum detection concentration is about 7.5 渭 L / L, and the relative deviation from the calculated value is only 3.8. In addition, based on the laser array technology, the absorption spectrum detection of other six transformer fault feature mixture gases COCO2CO2CH4 / C2H2H4 and C2HSn6 are realized. The detection accuracy and minimum detection concentration are the same as the requirements of dissolved gas analysis in transformer oil. The research provides theoretical basis and technical support for the development of transformer fault feature gas field detection system based on frequency locked absorption spectrum technology.
【作者单位】： 输配电装备及系统安全与新技术国家重点实验室(重庆大学);
【基金】：国家自然科学基金项目(61605020) 重庆市基础科学与前沿技术研究专项(cstc2016jcyj A0427) 中国及重庆市博士后科学基金项目(2016M600722,2017T100675,Xm201602)~~
【分类号】：TM407
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本文编号：2087736