Numerical Modeling of Space Charge in Polyethylene under AC Fields


Zhao, J, Xu, Z, Chen, G and Lewin, P L (2010) Numerical Modeling of Space Charge in Polyethylene under AC Fields. In, 2010 IEEE International Conference on Solid Dielectrics, Potsdam, Germany, 04 - 09 Jul 2010. IEEE, 565-568.

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Description/Abstract

A bipolar charge transport model has been developed to simulate the dynamics of space charge under dc fields. The modeling shows space charge build-up and decay comparable to experiments. In this paper, this bipolar charge transport model is taken further to simulate the space charge in polyethylene under ac fields. The results show that there is small quantity of phase dependent bipolar charge accumulation mostly in the vicinity of the electrodes instead of moving into the bulk under ac fields. This causes a slight distortion of the local field in the bulk. However at lower frequencies (less than 1Hz) there is increased charge accumulation and penetration. The conduction current is quite small and hence the displacement component dominates the total current. Bipolar charge recombination is going to reach a saturation level after a certain ac stressing time. Increasing the ac voltage will normally increase the amount of total charge and the charge recombination rate.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 4 - 9 July 2010
ISBNs: 9781424474929
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science
Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE
ePrint ID: 271368
Date Deposited: 07 Jul 2010 14:06
Last Modified: 27 Mar 2014 20:16
Further Information:Google Scholar
ISI Citation Count:0
URI: http://eprints.soton.ac.uk/id/eprint/271368

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