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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Dissado, L.A. Zadeh, S. Fothergill, J.C. See, A. |
| Copyright Year | 2007 |
| Description | Author affiliation: Leicester Univ., Leicester (Dissado, L.A.; Fothergill, J.C.) |
| Abstract | The generation and transit of charge packets in 150mum thick peelings from the insulation of Medium Voltage Cables manufactured using the same XLPE batch have been investigated at a number of different temperatures. Charge packet motion was investigated in peelings taken from cables that have been electro-thermally stressed at T= 90degC for 5000 hours with a Laplacian field E = 20kV/mm at the location of the samples. It was found that charge packets were generated by an applied field of 120kV/mm when the internal space charge field reached 140-150kV/mm. Measurements were made in three controlled temperature environments and it was found that the transit time fitted an Arrhenius behaviour with an activation energy of -1.2 eV. This value is similar to estimates made for the deepest traps (>1.1eV) made from the decay of space charge accumulated at lower fields of 46.67kVmm. It is also close to the activation energy for the conductivity (-1.25 eV) obtained from the dielectric spectroscopy of unpeeled cable sections at $E_{rms}$ = 0.41 V/mm, and ~1.15eV from the dielectric spectroscopy of the peelings (E = 40V/mm). It is therefore concluded that the transit of the charge packet is associated with the trap-to-trap transport of charge carriers located in the deepest traps available. The implications of these results for the mechanism of charge packet generation is discussed. |
| Starting Page | 425 |
| Ending Page | 428 |
| File Size | 473363 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424414819 |
| DOI | 10.1109/CEIDP.2007.4451552 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-10-14 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Temperature dependence Space charge Dielectrics Electrochemical impedance spectroscopy Cable insulation Medium voltage Manufacturing Laplace equations Energy measurement Time measurement |
| Content Type | Text |
| Resource Type | Article |
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