Mechanism of space charge formation in cross linked polyethylene (XLPE) under temperature gradient

A bipolar charge transport model is used to simulate the formation of space charge in XLPE plaques placed under a temperature gradient. The model is used to assess the relative importance of charge migration and blocked extraction for three possible effects of the temperature gradient. The simulations were carried out for samples with different thicknesses and the results verified by comparison with experiment. In this way it has been shown that not only does the temperature gradient influence space charge accumulation through its introduction of a conductivity gradient, but also through differences in the injecting and extracting processes at electrodes of different temperature.

[1]  G. Chen,et al.  Space charge formation and its modified electric field under applied voltage reversal and temperature gradient in XLPE cable , 2008, IEEE Transactions on Dielectrics and Electrical Insulation.

[2]  Nicholas Quirke,et al.  Molecular modeling of electron trapping in polymer insulators , 2000 .

[3]  Gian Carlo Montanari,et al.  Models of bipolar charge transport in polyethylene , 2006 .

[4]  N. Quirke,et al.  Electronic states of excess electrons in polyethylene , 2002, Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[5]  T. Lewis,et al.  The contribution of field-induced morphological change to the electrical aging and breakdown of polyethylene , 2005, IEEE Transactions on Dielectrics and Electrical Insulation.

[6]  T. Maeno,et al.  Effects of crosslinking byproducts on space charge formation in crosslinked polyethylene , 2005, IEEE transactions on dielectrics and electrical insulation.

[7]  J. Hjerrild,et al.  Effect of Insulation Properties on the Field Grading of Solid Dielectric DC Cable , 2001, IEEE Power Engineering Review.

[8]  Demin Tu,et al.  Space charge in XLPE power cable under dc electrical stress and heat treatment , 1995 .

[9]  G. Montanari,et al.  A new conduction phenomenon observed in polyethylene and epoxy resin: Ultra‐fast soliton conduction , 2011 .

[10]  T. Takada,et al.  Space charge formation in LDPE/MgO Nano-composite under high electric field at high temperature , 2007, 2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena.

[11]  John C. Fothergill,et al.  Electric field criteria for charge packet formation and movement in XLPE , 2001 .

[12]  Ying Li,et al.  Experimental observation of charge transport and injection in XLPE at polarity reversal , 1992 .

[13]  T. Okamoto,et al.  Space charge behavior in XLPE cable insulation under 0.2-1.2 MV/cm dc fields , 1998 .

[14]  L. A. Dissado,et al.  Dependence of charge accumulation on sample thickness in Nano-SiO2 doped IDPE , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.

[15]  C. Laurent,et al.  Modeling of charge injection and extraction in a metal/polymer interface through an exponential distribution of surface states , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.

[16]  Jung-Ki Park,et al.  Effects of sample preparation conditions and short chains on space charge formation in LDPE , 1996 .

[17]  X. Chen,et al.  Effect of voltage reversal on space charge and transient field in LDPE films under temperature gradient , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[18]  G. Chen,et al.  Influence of thermal treatment and residues on space charge accumulation in XLPE for DC power cable application , 2007, IEEE Transactions on Dielectrics and Electrical Insulation.

[19]  Y. Murata,et al.  Space charge suppression effect of nano-size fillers added to polymeric materials , 2009 .

[20]  X Chen,et al.  Space charge measurement in LPDE films under temperature gradient and DC stress , 2010, IEEE Transactions on Dielectrics and Electrical Insulation.

[21]  K. Bambery,et al.  Space charge accumulation in two power cable grades of XLPE , 1998 .

[22]  G. Teyssedre,et al.  Charge dynamics and its energetic features in polymeric materials , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.

[23]  K. Suh,et al.  Effects of constituents of XLPE on the formation of space charge , 1994 .

[24]  G. Teyssedre,et al.  Polymeric HVDC Cable Design and Space Charge Accumulation. Part 1: Insulation/Semicon Interface , 2007, IEEE Electrical Insulation Magazine.

[25]  S. Roy,et al.  Numerical methods in the simulation of charge transport in solid dielectrics , 2006 .

[26]  G. Montanari,et al.  Relative Importance of Trapping and Extraction in the Simulation of Space Charge Distribution in Polymeric Insulators under DC Potentials , 2007, 2007 IEEE International Conference on Solid Dielectrics.

[27]  G. Chen,et al.  Electrodes and charge injection in low-density polyethylene using the pulsed electroacoustic technique , 2001 .

[28]  Jiansheng Yuan,et al.  Simulation of bipolar charge transport with trapping and recombination in polymeric insulators using Runge–Kutta discontinuous Galerkin method , 2008 .

[29]  Nicholas Quirke,et al.  Electron trapping in polymer insulators : A new approach using molecular modelling , 1998 .

[30]  G. Teyssedre,et al.  Bipolar charge transport model with trapping and recombination: an analysis of the current versus applied electric field characteristic in steady state conditions , 2008 .

[31]  Teruyoshi Mizutani,et al.  Space charge measurement techniques and space charge in polyethylene , 1994 .

[32]  T. Takada,et al.  Attenuation recovery technique for acoustic wave propagation in PEA method , 2001, Proceedings of 2001 International Symposium on Electrical Insulating Materials (ISEIM 2001). 2001 Asian Conference on Electrical Insulating Diagnosis (ACEID 2001). 33rd Symposium on Electrical and Ele.

[33]  G. Montanari,et al.  High mobility conduction in insulating polymers through fast soliton-like charge pulses , 2009 .

[34]  Jacques Lewiner,et al.  Evidence of strong correlation between space-charge buildup and breakdown in cable insulation , 1996 .

[35]  G. Teyssedre,et al.  HVDC Cable Design and Space Charge Accumulation. Part 3: Effect of Temperature Gradient [Feature article] , 2008, IEEE Electrical Insulation Magazine.