From LDPE to XLPE: investigating the change of electrical properties. part II: luminescence

Teyssèdre, G.; Laurent, Christian; Montanari, Gian Carlo; Campus, A.; Nilsson, U.H.

doi:10.1109/tdei.2005.1453449

Cited by 31 publications

(12 citation statements)

References 16 publications

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“…Reference 36 provided information on the specific relation between space charge distribution and electric field. 36 In the range of 5-10 kV/mm, the space charge profiles exhibit no notable difference, because there is only surface charge on the electrode. When the electric field strength is raised to 15 and 20 kV/mm, it was seen that the charge peaks across the interface between the electrode and the specimen move to the specimen bulk, indicating that charges at the electrodes moves forward the bulk, and also charges in the bulk are redistributed inside.…”

Section: Electric Field Strengthmentioning

confidence: 98%

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Research progress on space charge characteristics in polymeric insulation

Zhang¹,

Christen

Meng³

et al. 2016

J. Adv. Dielect.

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Due to their excellent electrical insulation properties and processability, polymer materials are used in many electrical products. It is widely believed that space charge plays an important role for the electric field distribution, conduction, ageing, and electric breakdown of polymeric insulation. This paper reviews measurements and characteristics of space charge behavior which mainly determined by the pulsed electro-acoustic (PEA) measurement technique. Particular interests are the effects of the applied voltage, the electrodes, temperature, humidity, microstructure, additives, and filler materials on accumulation, distribution, transport, and the decay of space charge in polymeric materials. This review paper is to provide an overview on various space charge effects under different conditions, and also to summarize the information for polymeric materials with suppressed space charge and improved electrical behavior.

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Section: Electric Field Strengthmentioning

confidence: 98%

“…The threshold field for traveling packets characterizes sometimes at the same time a threshold for the onset of electro-luminescence. 36 The 3-H PEA system allowing real-time space-charge observations makes it possible to measure charge packet dynamics, 9 as shown in Figs. 4(a) and 4(b).…”

Section: Electric Field Strengthmentioning

confidence: 99%

Research progress on space charge characteristics in polymeric insulation

Zhang¹,

Christen

Meng³

et al. 2016

J. Adv. Dielect.

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“…8qji ee (x,t)/8t+8jc (x,t)jax = Sfr ee (x,t) (3) 8 q, rap (x,t)/8t = S,rap (x,t) (4) jc (x,t) = qjiee (x,t). fl·F(x,t) (5) 82¢( x,t)/ ax2 = -( qjiee (x,t) + q'ra" (x,t))/ BOer (6) ¢s(t)= f: F(x,t)dx (7) where, qjree and q lra" are the free charge density and trapped charge density in the dielectric in C/m3, respectively.…”

Section: Bipolar Charge Transport Modelmentioning

confidence: 99%

The effect of charge recombination on surface potential decay crossover characteristics of LDPE

Min

2014

Proceedings of 2014 International Symposium on Electrical Insulating Materials

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Bipolar charge injection and transport has been ob served in corona charged low density polyethylene (LDPE) dur ing surface potential decay (SPD) processes. The proposed bipo lar charge transport (BCT) model can well interpret the SPD characteristics, especially the SPD crossover phenomenon. Bipo lar charge transport in materials can result in charge recombina tion (CR). It is evident that CR can affect space charge distribu tions and external current of insulators subjected to electrical stresses. Therefore, it is of interest to investigate the influence of CR on the SPD and crossover behaviors of charged insulating materials. We deal with the SPD properties of corona charged LDPE by the BCT model with a constant charge carrier mobility, including charge trapping/detrapping and CR. The non-linear charge advection-reaction equation in the BCT model is solved by a highly stable and accurate finite difference weighted essentially non-oscillatory (WENO) method with the Strang splitting method. The Poisson's equation is resolved by boundary element method (BEM). The simulation outputs show that the recombination co efficients can affect the space charge and electric field profiles,and recombination rate in the corona charged material. We find that the larger the recombination coefficients are, the higher the threshold initial surface potential for SPD crossover will be.

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“…PE has been widely used in power apparatus as the main insulation material (e.g., capacitors, cables) [1,2]. Currently, much effort has been devoted to enhance the electric strength and the insulation property of PE under a direct current field by using various techniques [3,4,5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Doping Effect of Graphene Nanoplatelets on Electrical Insulation Properties of Polyethylene: From Macroscopic to Molecular Scale

et al. 2016

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The doping effect of graphene nanoplatelets (GNPs) on electrical insulation properties of polyethylene (PE) was studied by combining experimental and theoretical methods. The electric conduction properties and trap characteristics were tested for pure PE and PE/GNPs composites by using a direct measurement method and a thermal stimulated current (TSC) method. It was found that doping smaller GNPs is more beneficial to decrease the conductivity of PE/GNPs. The PE/GNPs composite with smaller size GNPs mainly introduces deep energy traps, while with increasing GNPs size, besides deep energy traps, shallow energy traps are also introduced. These results were also confirmed by density functional theory (DFT) and the non-equilibrium Green’s function (NEGF) method calculations. Therefore, doping small size GNPs is favorable for trapping charge carriers and enhancing insulation ability, which is suggested as an effective strategy in exploring powerful insulation materials.

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From LDPE to XLPE: investigating the change of electrical properties. part II: luminescence

Cited by 31 publications

References 16 publications

Research progress on space charge characteristics in polymeric insulation

Research progress on space charge characteristics in polymeric insulation

The effect of charge recombination on surface potential decay crossover characteristics of LDPE

Doping Effect of Graphene Nanoplatelets on Electrical Insulation Properties of Polyethylene: From Macroscopic to Molecular Scale

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