الفهرس | Only 14 pages are availabe for public view |
Abstract Detection of partial discharge (PD) is vital to reassure the reliability of Medium voltage (MV) and high voltage (HV) electric power systems during operation. Nevertheless, optical detection methods has been developed in recent years due to their high sensitivity and immunity to electromagnetic interference. The conventional optical fibers have exhibited excellent performance in optical PD detection and many applications. However, they suffer from limitations regarding their structure. In particular, the optical fiber design should satisfy the design rules of core diameter limitation in single-mode operation and selection of core and cladding materials to be with similar thermal characteristics. In this work, two D-shaped Photonic crystal fiber based on surface plasmon resonance sensors for optical detection of PD in MV and HV equipment including gas insulated systems are designed and investigated for the first time to the best of our knowledge. First, a photochromic spirooxazine dye-doped silica sol-gel is utilized for sensing the UV radiation emitted from the PD in air. Then, a methyl-red-doped poly (methyl methacrylate) (MR-PMMA) is used for sensing the radiation from the PD in SF6-insulated systems, which is mainly a visible light. Furthermore, the sensors have the advantage of a simple structural design and easy fabrication. The sensing performance of the proposed sensors is demonstrated with the help of the full vectorial finite element method (FVFEM). Moreover, the proposed UV sensor shows high sensitivity of 2.4 nm/mW.cm-2 . Additionally, the ratio of the sensitivity to the full width at half maximum (FWHM) represented by Figure of merit (FOM) shows a high value of 0.073 mW-1 .cm2 . On the other hand, the sensing ability of the visible light sensor is investigated under different light intensities. Hence, the numerical simulation results show the highest sensitivity of 667 pm/mW.cm-2 besides high sensing linearity. |