Computer simulation on formation of space charge packets in XLPE films

Kaneko, K.; Mizutani, Tadashi; Suzuoki, Y.

doi:10.1109/94.765904

Cited by 115 publications

(84 citation statements)

References 3 publications

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“…Several models [12][13][14] have been proposed to simulate the formation and decay of space charge with certain degree of success. However, due to many parameters introduced in these models the exact physical processes of trapping and detrapping are not detailed.…”

Section: B Trapping Processmentioning

confidence: 99%

Charge trapping and detrapping in polymeric materials

Chen¹,

Xu²

2009

Journal of Applied Physics

218

159

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Space charge formation in polymeric materials can cause some serious concern for design engineers as the electric field may severely be distorted, leading to part of the material being overstressed. At the worst, this may result in material degradation and possibly premature failure. It is therefore important to understand charge generation, trapping, and detrapping processes in the material. In the present paper, the characteristics of charge trapping and detrapping in low density polyethylene under dc electric field have been investigated using the pulsed electroacoustic technique. It has been found that the charge decay shows very different characteristics for the sample with different periods of electric field application. To explain the results a simple trapping and detrapping model based on two trapping levels has been proposed. Qualitative analysis revealed the similar features to those observed experimentally.

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Section: B Trapping Processmentioning

confidence: 99%

Charge trapping and detrapping in polymeric materials

Chen¹,

Xu²

2009

Journal of Applied Physics

218

159

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show abstract

“…10,11 Meanwhile, only a few attempts have been made to provide some model description of these experimental results. [12][13][14][15][16] We have initiated an activity which aims at modeling charge transport phenomena in a synthetic insulator largely used in the high voltage area: polyethylene. The aims are to account for the internal distribution of field as a function of stress, which could be used in the future to feed aging models, since, whatever the aging scenario considered, the local field is an important parameter.…”

Section: Introductionmentioning

confidence: 99%

Models of bipolar charge transport in polyethylene

Boufayed

Teyssèdre

Laurent

et al. 2006

Journal of Applied Physics

164

130

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We introduce and develop two bipolar transport models which are based on appreciably different physical assumptions regarding the distribution function in the energy levels of trap states. In the first model, conduction is described by an effective mobility of the carriers and the accumulation of stored space charge is taken into account through a single trapping level. In the second model the hypothesis of an exponential distribution function of trap depth is made, with conduction taking place via a hopping process from site to site. The results of simulations of the two models are compared with experimental data for the external current and the space-time evolution of the electrical space charge distribution. The two descriptions are evaluated in a critical way, and the prospects for these models to adequately describe real systems are given.

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“…For these problems, different techniques for the space charge measurements were developed in order to understand and overcome their effects on the electrical properties such as electrical breakdown and conduction mechanism [5,6]. During these last years, the theoretical modelling and simulation have been integrated for better understanding the space charge dynamics [7][8][9][10][11][12]. Previous works showed the existence of two charge dynamics corresponding to mobile and trapped carriers at high and low DC applied voltages, respectively [12,13].…”

Section: Introductionmentioning

confidence: 99%

Physical and Numerical Modelling for Bipolar Charge Transport in Disorder Polyethylene Under High DC Voltage

Boukhris¹,

Belgaroui²,

Kallel³

2010

ijeei

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Laboratoire des matériaux composites céramiques et polymères (LaMaCoP) Faculté des sciences de Sfax BP 805 Sfax 3000 Tunisie. imed_boukhris@yahoo.frAbstract: This paper reports on validation of a numerical model for both transient and steady bipolar charge transport, trapping and recombination in polymeric insulators, such as low density polyethylene. The numerical model is based on the high precision Runge-Kutta method for determining mobile and trapped charge local density within the sample, during the application of a DC voltage. In addition, we have applied the finite element method considered as the most general one, which can be applied to any sample shape and boundary conditions. It is applied to resolve Poisson's equation, thus providing the potential and its gradient within the sample and at the dielectric-electrode interfaces. The principal results show the appearance of charge packets for the first time in modeling works although they have long been reported in experimental studies on polyethylene materials. The conditions for the appearance of such packets are discussed. For the net space charge density and the conduction current, the dynamics are in a good agreement with those observed in some experimental works during the transit time of the bipolar carriers. The model is already numerically validated for the space charge densities and the electric field distribution under low DC voltage.

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Computer simulation on formation of space charge packets in XLPE films

Cited by 115 publications

References 3 publications

Charge trapping and detrapping in polymeric materials

Charge trapping and detrapping in polymeric materials

Models of bipolar charge transport in polyethylene

Physical and Numerical Modelling for Bipolar Charge Transport in Disorder Polyethylene Under High DC Voltage

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