Molybdenum Disulphide Coated Fluorescent Fiber for Detection of Corona Discharges in Transformer Oil

Early detection of corona discharge plays a critical role in avoiding catastrophic failure of transformer insulation. In this study, we explore the use of two-dimensional material coated fluorescent fiber for early detection of corona discharge. Specifically, Molybdenum disulphide (MoS2) material is dip coated over a commercial grade fluorescent since the bandgap of the coated MoS2 material corresponds to the visible and ultraviolet (UV) spectral regions. Corona inception voltage detection adopting MoS2 coated fluorescent fiber exhibits detection efficiency with the percentage difference of 32% in comparison to the UHF technique. Also, fiber coating enhances the energy content of the discharge signal by the difference of 150% with respect to uncoated fluorescent fiber. The phase resolved partial discharge studies reveal that the discharge is observed at the peak of the applied AC voltage.