变压器油中气体拉曼光谱光纤增强检测实验研究

Study on Experiment of the Raman Spectroscopy Detection Using Optical Fiber Enhancement

变压器油中溶解气体检测是目前国内外公认的诊断油浸式电力变压器早期潜伏性故障的有效方法之一。拉曼光谱利用单一波长的激光同时实现混合气体直接检测,具有明显的优势。论文开展了基于空芯光子带隙光纤的光纤增强拉曼光谱检测实验研究:基于MATLAB仿真确定了最佳光纤长度为1 m;设计并搭建了基于空芯光子带隙光纤增强的变压器油中溶解故障特征气体拉曼光谱检测平台,对比分析了H_(2)、CO_(2)和C_(2)H_(6)气体的光纤增强拉曼光谱检测特性,相比不采用光纤的直接测量,各气体特征峰峰面积及峰高均增强约9倍,表明了光纤增强拉曼光谱气体检测的可行性和有效性。

The detection of dissolved gases in transformer oil is one of the effective methods to diagnose the early latent faults of oil-immersed power transformers.Raman spectroscopy has obvious advantages in the direct detection of mixed gases by using a single wavelength laser at the same time.In this paper,the experimental study of fiber-enhanced Raman spectroscopy detection based on hollow photonic bandgap fiber is carried out:the optimum length of fiber is 1 m based on MATLAB simulation;the Raman spectroscopy detection platform of dissolved fault characteristic gas in transformer oil based on hollow photonic bandgap fiber enhancement is designed and built,and H_(2),CO_(2) and C_(2)H_(6) are compared and analyzed.Compared with the direct measurement without optical fiber,the peak area and peak height of each gas characteristic peak are enhanced about 9 times,which indicates the feasibility and effectiveness of optical fiber enhanced Raman spectroscopy for gas detection.