变压器故障特征气体光反馈频率锁定非对称线型F-P腔增强拉曼光谱检测研究  

Transformer Fault Characteristic Gas Optical Feedback Frequency Locking Asymmetric Linear F-P Cavity Enhanced Raman Spectroscopy Detection

作　　者：万福 白耀天[1] 王锐 朱磊 龙英凯 陈伟根 WAN Fu;BAI Yaotian;WANG Rui;ZHU Lei;LONG Yingkai;CHEN Weigen(State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China;National Innovation Center for Industry-Education Integration of Energy Storage Technology,Chongqing University,Chongqing 400044,China;State Grid Chongqing Electric Power Company Chongqing Electric Power Research Institute,Chongqing 401123,China)

机构地区：[1]重庆大学输变电装备技术全国重点实验室(重庆大学电气工程学院),重庆400044 [2]重庆大学国家储能技术产教融合创新平台,重庆400044 [3]国网重庆市电力公司电力科学研究院,重庆401123

出　　处：《光子学报》2024年第11期156-166,共11页Acta Photonica Sinica

基　　金：国家电网有限公司科技项目资助(No.SGCQDK00SBJS2200274)。

摘　　要：提出一种简便且高灵敏度的非对称腔镜线型F-P腔增强拉曼光谱气体检测技术,将腔谐振光直接反馈至二极管激光器,实现642 nm多量子阱二极管激光器稳定锁定到外部线型腔进行功率积累,从而增强气体拉曼信号。降低腔输入镜的反射率来使反馈光中谐振光的强度高于直反光,使谐振光在锁定过程中占主导地位。与传统技术相比,在没有添加任何附加光学元件或复杂光学布置的情况下,保证了腔内激光基本横向模式TEM00的稳定功率积累。用80 mW的二极管激光器在腔内累积产生320 W的激光。采用后向拉曼信号收集方式,在60 s积分时间下,对变压器主要故障特征气体CH_(4)、C_(2)H_(6)、C_(2)H_(4)、C_(2)H_(2)、CO、CO_(2)的检出限分别为1.3、4.4、2.7、1.2、10.5、5.1μL/L。The oil-immersed power transformer represents a pivotal component within the framework of a power system.The accurate detection of power transformer operation status and the issuing of fault warnings are of great significance in ensuring the safe and reliable operation of the power grid.The composition and content of dissolved gases in transformer oil are closely related to the fault state of the transformer.One of the most effective methods for diagnosing the operational state of a transformer is the accurate detection and analysis of the characteristic gases associated with transformer faults.Trace gas sensing based on laser spectroscopy plays a pivotal role in numerous fields,including environmental monitoring,urban surveillance,industrial process control,medical diagnostics,and agronomy.Raman spectroscopy is based on the Raman scattering effect of matter,which can be used to detect all gases except single atom gases.The simultaneous qualitative and quantitative analysis of multi-component gases can be achieved by utilizing a single wavelength laser.Nevertheless,the extremely low Raman scattering cross-section of gas represents a significant limitation in the detection sensitivity of Raman spectroscopy,which in turn constrains its broad applicability in the field of trace gas detection and analysis.Fiber-Enhanced Raman Spectroscopy(FERS)is a Raman scattering signal enhancement technology based on hollow fibers.Its objective is to improve the collection efficiency of Raman scattered light.However,the balance time required for gas to enter the fiber is too long.Cavity-Enhanced Raman Spectroscopy(CERS)employs the linear correlation between the Raman signal and laser power to enhance the Raman signal of gases and improve the sensitivity of gas detection by stabilizing the laser to a linear Fabry-Pérot(F-P)cavity,thereby enabling the accumulation of optical power.One of the key issues associated with F-P cavity enhancement technology based on optical feedback frequency locking is the potential for the direct refle

关 键 词：线型F-P腔 光学反馈 非对称腔镜 拉曼光谱 气体检测 

分 类 号：TN247[电子电信—物理电子学]