Effects of crosslinking byproducts on space charge formation in crosslinked polyethylene

Maeno, Y.; Hirai, Naoshi; Ohki, Yoshimichi; Tanaka, Toshikatsu; Okashita, M.; Maéno, Takashi

doi:10.1109/tdei.2005.1394019

Cited by 90 publications

(38 citation statements)

References 14 publications

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“…where N 0 is the effective density of states in the valence band, ε is the permittivity of the sample, H is the total trap density, and l is a constant inverse proportional to the measuring temperature and always greater than 1 [24]. So the exponent of the voltage must always be greater than 2 and becomes smaller at higher temperature.…”

Section: Effect Of Temperature On Thresholdmentioning

confidence: 99%

“…The formation of homocharge is believed to be caused by charge injection, whereas heterocharge may be formed in two ways: 1) field-assisted ionic dissociation of chemical species intrinsic to the insulation; 2) injected charge blocked or part blocked at the extraction electrode [24,25]. Since the charge mobility at room temperature is relatively low, it seems unlikely for the injected charge to cross the sample within the measurement time.…”

Section: Effect Of Temperature On Chargementioning

confidence: 99%

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Effect of temperature on space charge trapping and conduction in cross-linked polyethylene

Lan

Yin

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

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This paper presented the measurement results of space charge distribution and high field conduction in cross-linked polyethylene (XLPE) plate sample at various electric fields for a broad temperature range from 30 to 90 o C. The temperature effect on charge trapping and transport mechanism is discussed based on estimation of threshold characteristic and apparent mobility. It is shown that the threshold field for space charge accumulation apparently decreased with the temperature, probably associated with acceleration of charge injection and ionic dissociation. The apparent mobility of charges showed an exponential dependence on temperature, which indicates enhancement of charge detrapping and transfer rate at higher temperature. The field dependence of the space charge decreases with the temperature, results in more space charge accumulate at room temperature than at high temperature at certain high field. This behavior indicates that the space charge formation rate increases slower than the charge detrapping rate as the temperature increases. Besides, negative charge is always dominant in the sample at the measuring field and temperature range. This is probably due to stronger electron injection at XLPE-aluminum interface or more negative ion formed by dissociation of chemical species.

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Section: Effect Of Temperature On Thresholdmentioning

confidence: 99%

Section: Effect Of Temperature On Chargementioning

confidence: 99%

Effect of temperature on space charge trapping and conduction in cross-linked polyethylene

Lan

Yin

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

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“…Moreover, insulation systems containing additives, byproducts, or something similar may be more sensitive to humidity than clean material 69 because of ionic dissociation in the presence of moisture. 70 Thus it is important to control the amount of absorbed moisture in polymeric insulation material as this governs the dynamics of the charge build-up and decay in the epoxy resin samples.…”

Section: Humidity and Inherent Moisturementioning

confidence: 99%

“…91 A number of experiments have been designed for the clarification how the crosslinking byproducts affect the space charge formation and which byproduct is the dominant. 69,88,[92][93][94] For instance, Maeno et al 69,[92][93][94] reported that cumyl-alcohol is responsible for homo-charge in LDPE and XLPE, acetophenone for heterocharge in XLPE, and -methylstyrene has no effect in LDPE but provides traps in XLPE. It is believed that space charge can be significantly reduced with a proper elimination of all the crosslinking by-products (de-gassing), water, and carbonyl groups.…”

Section: Additives and Cross-linking By-productsmentioning

confidence: 99%

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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“…At the same time, the nature of the trap is closely linked to the storage and transport of charge. So many features of polymer dielectric materials are closely related to the distribution of space charge [3][4]. Therefore, scientific and accurate characterization of trap energy spectrum distribution in the dielectric material is of great scientific significance and practical value to improve the performance and application level of the dielectric material [5].…”

Section: Introductionmentioning

confidence: 99%

The Research on the Effects of Electrical Aging on Trap Distribution in Polyethylene Doped with Nanoparticies

Li¹,

Wang²,

Zhu³

et al. 2014

IJCA

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Effects of crosslinking byproducts on space charge formation in crosslinked polyethylene

Cited by 90 publications

References 14 publications

Effect of temperature on space charge trapping and conduction in cross-linked polyethylene

Effect of temperature on space charge trapping and conduction in cross-linked polyethylene

Research progress on space charge characteristics in polymeric insulation

The Research on the Effects of Electrical Aging on Trap Distribution in Polyethylene Doped with Nanoparticies

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