Emission spectroscopy of partial discharges in air-filled voids in Unfilled epoxy
| Autor: | Sergey Pancheshnyi, Issatay U. Nadinov, Svetlana Starikovskaia, Philippe Auvray, Lorenz Herrmann, Sergey Shcherbanev |
|---|---|
| Přispěvatelé: | Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Nuclear and High Energy Physics Range (particle radiation) Materials science 020209 energy Analytical chemistry chemistry.chemical_element 02 engineering and technology Condensed Matter Physics 01 natural sciences Emission intensity Nitrogen Surface conductivity chemistry [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] 0103 physical sciences Electrode 0202 electrical engineering electronic engineering information engineering Stimulated emission Emission spectrum Spectroscopy |
| Zdroj: | IEEE Transactions on Plasma Science IEEE Transactions on Plasma Science, 2016, 44 (7), pp.1219-1227. ⟨10.1109/TPS.2016.2576560⟩ IEEE Transactions on Plasma Science, Institute of Electrical and Electronics Engineers, 2016, 44 (7), pp.1219-1227. ⟨10.1109/TPS.2016.2576560⟩ |
| ISSN: | 0093-3813 |
| DOI: | 10.1109/TPS.2016.2576560⟩ |
| Popis: | International audience; Emission optical spectroscopy is used as a technique to study partial discharges (PDs) in four unfilled epoxy samples encompassing an artificial air-filled cavity. It is shown that emission spectroscopy can be used to estimate the density and the chemical composition of a gas from the spectrally resolved emission and time-resolved pulse shape of the PDs at any time during the aging process. Two scenarios are observed: either PD continues until the sample breaks down (observed in 1 out of 4 samples) or PD stops at a certain point without sample breakdown (3 out of 4 samples). For both the scenarios, a stable initial phase with a gradual decrease of emission intensity from the discharge is typical for a few hundreds of hours of continuous discharge operation. At this stage, the spectrum of the second positive system of molecular nitrogen dominates in the entire spectral range of 350500 nm studied in this work. Furthermore, time-resolved measurements indicate two types of discharges of very different frequencies and magnitudes as well as a decrease of the pressure in the voids as a function of aging time. Then, a sharp 500% increase of the N2 emission is observed 2 days before the breakdown; during the last day a spectrum of CO and some other C-N-O-H containing molecules is observed instead of the spectrum of molecular nitrogen. This allows predicting a breakdown at least a few hours before it happens by analyzing the broad emission spectra behavior. Additionally, the possible role of surface conductivity increase during aging on PD inhibition is discussed. |
| Databáze: | OpenAIRE |
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