Fiber Bragg Grating Hydrogen Sensor Applied for Partial Discharge Detection in Transformer Oil

Abstract

Most optical hydrogen sensors are based on light intensity measurement and light intensity detection is vulnerable to the light source output and the optical fiber arrangement. To overcome the shortcomings, an optical fiber based sensor based on fiber Bragg grating (FBG) technique which is capable to measure the concentration of hydrogen dissolved is described in this paper. To examine the availability of monitoring initial hydrogen generation, a needle-to-plate partial discharge (PD) model was setup in the lab. The results between wavelength shifts of optical hydrogen sensor well agreed with conventional dissolved gas analysis (DGA), proving a potential utilization in the detection of dissolved hydrogen in power transformer.

First-Principles Calculations of Gas-Sensing Properties of Pd Clusters Decorated AlNNTs to Dissolved Gases in Transformer Oil

“…However, insulation defects inevitably occur during the long-running transformer. It may arouse the decomposition of inner filled oil to trace of oil-dissolved gases under electric discharge, including hydrogen (H 2 ), methane (CH 4 ), acetylene (C 2 H 2 ), and ethylene (C 2 H 4 ) [3]- [6]. The continuous electric discharge will seriously damage the operational stability of the electric system and industrial production [1], [7]- [9].…”