Simultaneous Analysis of Gases Extracted From Transformer Oil Using Raman Spectroscopy

Dissolved gas analysis has been accepted worldwide as the most practical diagnostic method for detecting incipient transformer faults. However, simultaneous detection of multi-trace gases (H2, CO, CO2, CH4, C2H2, C2H4 and C2H6) is still a challenge with high accuracy and sensitivity. In this paper, for the first time, the technology of Raman spectroscopy was used to achieve qualitative and quantitative analysis of fault gases extracted from transformer oil. Firstly, the fundamentals of Raman spectroscopy for molecular detection was introduced and discussed. Then based on our home-built Raman system, the simultaneous measurement of seven kinds of fault gases was achieved qualitatively. And one or more Raman variations of each gas species had been detected. For convenience and sensitivity of…