Abstract

We have developed a laser Raman spectroscopy technique for assessing the working conditions of transformers by measuring dissolved ${\mathrm{C}}_2{\mathrm{H}}_2$ gas concentrations present in transformer oils. A frequency doubled $Q$-switched Nd:YAG laser (532 nm) was used as a laser source, and Raman signals at $\sim 1972{\mathrm{cm}}^{-1}$ originating from ${\mathrm{C}}_2{\mathrm{H}}_2$ gas dissolved in oil were detected. The results show that laser Raman spectroscopy is a useful alternative method for detecting transformer faults.

© 2013 Optical Society of America

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