New Principle for the Determination of Potential Distributions in Dielectrics

Laurenceau, P.; Dreyfus, Gérard; Lewiner, J.

doi:10.1103/physrevlett.38.46

Cited by 286 publications

(81 citation statements)

References 4 publications

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“…Utilising a short pulse laser to ablate the front semi-con electrode, an acoustic wave is generated acting as a virtual probe sensitive to charge as it transverse through the material. Details and principle behind its operation can be found in numerous literatures [4][5].…”

Section: Methodsmentioning

confidence: 99%

The effect of degassing on morphology and space charge

Chong

Chen

2004

Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004.

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It is believed that space charge buildup in cross-linked polyethylene (XLPE) insulation is one of the main cause for premature failure of underground power cables. The space charge activities in XLPE depend on many factors such as additives, material treatment, ambient temperature, insulator/electrode interface, etc. Degassing is one of the material treatment processes commonly employed in cable manufacturing to improve insulation performance. In this paper, investigation on the effect of degassing period on the morphology and space charge was carried out. Planar XLPE samples of the same composite were subjected to different degassing time. It is discovered that apart from removing volatile by-products, degassing also anneals XLPE material; changing the morphology as a result.

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Section: Methodsmentioning

confidence: 99%

The effect of degassing on morphology and space charge

Chong

Chen

2004

Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004.

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“…There are two major techniques widely used to measure space charge in solid dielectric materials; they are the pulsed electroacoustic (PEA) technique (Maeno et al, 1988) and the PWP technique (Laurenceau et al, 1977). Depending on how the pressure wave is generated, the latter can be further classified as the laser induced pressure pulse (LIPP) method and the piezoelectric induced pressure wave propagation method (PIPWP).…”

Section: The Principle Of Pwpmentioning

confidence: 99%

The influence of oxidation on space charge formation in gamma-irradiated low-density polyethylene

Chen

Zhong

Xie

et al. 2003

Radiation Physics and Chemistry

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The research presented in this paper investigates the role of oxidation in the formation of space charge in gammairradiated low-density polyethylene after being electrically stressed under dc voltage. Polyethylene plaques both with and without antioxidant were irradiated up to 500 kGy using a 60 Co gamma source and space charge distributions were measured using the piezoelectric induced pressure wave propagation method. It has been found that a large amount of positive charge evolved adjacent to the cathode in the sample without antioxidant and was clearly associated with oxidation of the surface. The amount of charge formed for a given applied stress increased with the dose absorbed by the material. A model has been proposed to explain the formation of space charge and its profile. The charge decay after the removal of the external applied stress is dominated by a process being controlled by the cathode interfacial stress (charge injection) rather than a conventional RC circuit model. On the other hand, space charge in a sample containing antioxidant under the same applied electric stress was negligible even in the sample exposed to 500 kGy. The main process to form space charge is via charge injection rather than charge separation in the sample without antioxidant. r

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“…(7) A pressure wave can be produced with the use of a laser, a shock tube or a piezo device. With the pressure wave propagating through a sample, a nonuniform deformation of a local material, small displacement of space charge, and variation of permittivity occur.…”

Section: ∆V(t) =mentioning

confidence: 99%

“…Over the last 40 years, methods utilizing pressure pulses, (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) electron beams, (15)(16)(17) and thermal pulses (18)(19)(20) have been developed for the measurement of space charge in solid insulating materials. The pressure pulse techniques have also been used for the measurement of space charge in composite oil/cellulose insulating systems.…”

Section: Introductionmentioning

confidence: 99%

Space Charge Measurement Technologies and Their Potential Applications

2017

Sensors and Materials

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The development history of major space-charge measurement technologies is reviewed. Advantages and disadvantages are analyzed regarding the electron beam, thermal pulse, pressure wave, pulsed electroacoustic wave, electrooptic Kerr effect, and Pockels effect methods. Measurement technologies are discussed further with regard to principles, knowhow, and milestones of development. With the pulsed electroacoustic method as an example, a deconvolution technique is introduced, as it is needed to quantify the density of space charge in a material. Potential applications of these technologies to measure the distribution of space charge in dielectrics and electrical insulation materials and systems are addressed. By the electrooptic Pockels effect method, two-dimensional discharge patterns on the surfaces of cellulose Kraft paper and Nomex T410 paper were measured and reported for the first time. With the progress of the technologies, it appears that today, sensors can be made to measure quantitatively the distribution of space charge in dielectrics and electrical insulation systems.

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New Principle for the Determination of Potential Distributions in Dielectrics

Cited by 286 publications

References 4 publications

The effect of degassing on morphology and space charge

The effect of degassing on morphology and space charge

The influence of oxidation on space charge formation in gamma-irradiated low-density polyethylene

Space Charge Measurement Technologies and Their Potential Applications

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