Space charge measurements on impregnated paper: a review of the PEA method and a discussion of results

Morshuis, P.H.F.; Jeroense, Marc

doi:10.1109/57.591529

Cited by 114 publications

(49 citation statements)

References 10 publications

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“…50,52 This sensitive method is of high resolution, 53 with its basic principles can be found elsewhere. 50,54 The amplitude of measurement results is proportional to the density of charge, with its polarity straightforward denotes the polarity of charge, and the delay is related to the position of charge.…”

Section: Experimental Proof Of Ion Migrationmentioning

confidence: 99%

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Electrical degradation of double-Schottky barrier in ZnO varistors

Cheng

2016

AIP Advances

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Researches on electrical degradation of double-Schottky barrier in ZnO varistors are reviewed, aimed at the constitution of a full picture of universal degradation mechanism within the perspective of defect. Recent advances in study of ZnO materials by atomic-scale first-principles calculations are partly included and discussed, which brings to our attention distinct cognition on the native point defects and their profound impact on degradation.

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Section: Experimental Proof Of Ion Migrationmentioning

confidence: 99%

“…one-dimensional distribution, which is the prerequisite for performing PEA test. [50][51][52] In the quasi-bicrystal samples, the intergranular layer contains Bi, Mn and Co elements for acquiring excellent electrical nonlinearity (fabrication procedures of quasi-bicrystal are directed to Ref. 6).…”

Section: Experimental Proof Of Ion Migrationmentioning

confidence: 99%

Electrical degradation of double-Schottky barrier in ZnO varistors

Cheng

2016

AIP Advances

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“…Hence there was evident homocharge accumulation near the anode. As regards heterocharge accumulation inner specimens with higher moisture concentrations, it was firstly reported in 1997 [18]. It was thought to be caused by the influence of moisture on carriers' movement and dielectric polarization then.…”

Section: Space Charge Measurementmentioning

confidence: 99%

“…But there is still no complete explanation so far and more investigation is required. It is generally accepted that moisture can accelerate space charge accumulation within oil paper [18], but the moisture concentration is usually less than 5%. Fig.…”

Section: Space Charge Measurementmentioning

confidence: 99%

Space Charge Behavior of Oil-paper Insulation Thermally Aged under Different Temperatures and Moistures

Zhou¹,

Huang²,

Chen³

et al. 2015

Journal of Electrical Engineering and Technology

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-Moisture and high temperature are the most important factors that lead to the ageing of oil-paper insulation, but the research about space charge characteristics of oil-paper insulation does not take the combined effect of ambient temperature, moisture and thermal ageing into account. The pulsed electroacoustic (PEA) method was used to investigate the influence of moisture and temperature on space charge characteristics of oil paper at different ageing stages. The results showed that moisture could speed up formation of space charge in oil paper when water concentration was low, but the formation was restrained if the water concentration was high. At the beginning of thermal ageing, heterogeneous charge accumulation had predominance, but it gradually changed to homogeneous charge injection with ageing. It was believed that moisture concentration could speed up ageing and enhance charge accumulation on one hand, and accelerate or slow down the establishment speed of space charge on the other hand, therefore, charge accumulation type changed with ageing. The more seriously the oil-paper insulation was thermally aged, the deeper the trap energy level was, hence more space charge was trapped, which could be speeded up by increasing the ageing temperature, but the effect of ambient temperature did not fit the Arrhenius law.

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“…Partial discharge or breakdown may occur in those places where the electrical field strength is strengthened; this can lead to premature failure of the insulation material (Zhang et al 1996;Liu et al 1989). To date, research has focused on the space charge dynamics of oil-impregnated insulation paper affected by voltage level, temperature, and moisture (Morshuis and Jeroense 1997;Ciobanu et al 2002;Tang et al 2010;Zhou et al 2009;Liu et al 1998). Although studies have found that many nanoparticles improve the space charge distribution in insulation materials such as polyethylene and polyimide, there are no reports on how to improve the space charge distribution in oil-impregnated insulation paper (Fleming et al 2005;Huang et al 2009;Wang et al 2009;Zha et al 2010;Thelakkadan et al 2011;Abd El-kader et al 2009;Ahmad et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Space Charge Behavior in Oil-Impregnated Insulation Paper Reinforced with Nano-TiO2

Liao¹,

Lv²,

Yang³

et al. 2013

BioResources

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a Oil-impregnated insulation paper is widely used in power transformers, and the insulation properties of oil-impregnated insulation paper play an important role in the reliability of power equipment. The formation and dynamics of space charge can affect the performance of insulation material. However, methods to improve the space charge distribution in oil-impregnated insulation paper are rarely reported. In this paper, space charge behavior in oil-impregnated insulation paper has been investigated using the pulsed electro-acoustic (PEA) technique. A series of measurements was applied when the oil-impregnated insulation paper reinforced with different nano-TiO 2 contents was subjected to various electric field strengths. The accumulation and decay of space charge are discussed, and the internal electric field strength distribution of oilimpregnated insulation paper is analyzed. The test results show that the space charge distribution is improved and the distortion rate of the internal electric field strength is reduced by adding nano-TiO 2 to the oilimpregnated insulation paper. The results show that the proposed method offers a new way to improve the properties of oil-impregnated insulation paper.

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Space charge measurements on impregnated paper: a review of the PEA method and a discussion of results

Abstract: Quantitative knowledge about space charge inside electrical insulation is important in order to evaluate t h e electrical field.

Cited by 114 publications

References 10 publications

Electrical degradation of double-Schottky barrier in ZnO varistors

Electrical degradation of double-Schottky barrier in ZnO varistors

Space Charge Behavior of Oil-paper Insulation Thermally Aged under Different Temperatures and Moistures

Space Charge Behavior in Oil-Impregnated Insulation Paper Reinforced with Nano-TiO2

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