Hypothesis of Interfacial Charge Transportation in Oil-Paper Insulation for Transformer Moisture Estimation
Paper
Paper/Presentation Title | Hypothesis of Interfacial Charge Transportation in Oil-Paper Insulation for Transformer Moisture Estimation |
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Presentation Type | Paper |
Authors | Cui, Yi (Author), Ma, Hui (Author), Saha, Tapan (Author) and Liu, Yilu (Author) |
Journal or Proceedings Title | Proceedings of the 2019 IEEE Power & Energy Society General Meeting (PESGM) |
ERA Conference ID | 50486 |
Number of Pages | 5 |
Year | 2019 |
Place of Publication | Atlanta, United States |
ISBN | 9781728119816 |
Digital Object Identifier (DOI) | https://doi.org/10.1109/pesgm40551.2019.8973596 |
Web Address (URL) of Paper | https://ieeexplore.ieee.org/document/8973596 |
Conference/Event | 2019 IEEE Power and Energy Society General Meeting (PESGM) |
IEEE Power and Energy Society General Meeting | |
Event Details | 2019 IEEE Power and Energy Society General Meeting (PESGM) Event Date 04 to end of 08 Aug 2019 Event Location Atlanta, United States |
Event Details | IEEE Power and Energy Society General Meeting PES-GM |
Abstract | Accumulated space charge on the interface between oil and cellulosic paper has a significant impact on the dielectric excitation and relaxation behavior of transformer insulation system. Conventional differential time-domain dielectric spectroscopy (DTDS) function of polarization and depolarization current (PDC) measurement treats the whole oil-cellulosic paper insulation as a linear dielectric medium. This approach may not be able to separate the interfacial charge transportation from the relaxation process of dipoles. In this presented work, the effect of interfacial charge transportation on dielectric relaxation of oil-cellulosic paper insulation is investigated. A distributed parameter DTDS model of detrapping current caused by the interfacial charge transportation is established from the PDC measurement. Subsequently the characteristics parameters of the primary component of the distributed parameter DTDS model are extracted to estimate the moisture concentration of cellulosic insulation. The proposed method is verified using measurement results obtained at different stages of ageing experiment performed on prototype transformers. |
Keywords | Dielectric response; insulation; oil-paper interface; space charge; transformer |
ANZSRC Field of Research 2020 | 400803. Electrical energy generation (incl. renewables, excl. photovoltaics) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Tennessee, United States |
University of Queensland | |
Oak Ridge National Laboratory, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7w14/hypothesis-of-interfacial-charge-transportation-in-oil-paper-insulation-for-transformer-moisture-estimation
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