Space charge and charge trapping characteristics of cross-linked polyethylene subjected to ac electric stresses
Chong, Y L, Chen, G, Miyake, H, Matsui, K, Tanaka, Y and Takada, T (2006) Space charge and charge trapping characteristics of cross-linked polyethylene subjected to ac electric stresses. Journal of Physics D: Applied Physics, 39, (8), 1658-1666.
This paper reports on the result of space charge evolution in cross-linked polyethylene (XLPE) planar samples of approximately 220 μm thick. The space charge measurement technique used in this study is the PEA method. There are two phases to this experiment. In the first phase, the samples were subjected to dc 30 kVdc/mm and ac (sinusoidal) electric stress level of 30 kVpk/mm at frequencies of 1 Hz, 10 Hz and 50 Hz ac. In addition, ac space charge under 30 kVrms/mm and 60 kVpk/mm electric stress at 50 Hz was also investigated. The volts off results showed that the amount of charge trapped in XLPE sample under dc electric stress is significantly bigger than samples under ac stress even when the applied ac stresses are substantially higher. The second phase of the experiment involves studying the dc space charge evolution in samples that were tested under ac stress during the first phase of the experiment. Ac ageing causes positive charge to become more dominant over negative charge. It was also discovered that ac ageing creates deeper traps, particularly for negative charge. This paper also gave a brief overview of the data processing methods used to analyse space charge under ac electric stress.
|Keywords:||AC electric fields, space charge, electrical degradation, trapping characteristics|
|Divisions:||Faculty of Physical Sciences and Engineering > Electronics and Computer Science
Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE
|Date Deposited:||11 Apr 2006|
|Last Modified:||27 Mar 2014 20:05|
|Publisher:||IOP Publishing Ltd|
|Further Information:||Google Scholar|
|ISI Citation Count:||4|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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