Interface charge behavior of multi-layer oil–paper insulation under DC and polarity reversal voltages

Du, B. X.; Zhang, J. G.; Liu, Daosheng

doi:10.1109/tdei.2015.005052

Cited by 28 publications

(16 citation statements)

References 16 publications

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“…The PEA principle can be seen in literatures [1][2][3]10,13,14], as shown in Figure 1a [1]. When considering the oil-paper insulation is commonly used as multi-layer, in this experiment, oil-paper insulation samples with three layers immersed in new and aged oil were measured, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The charge density decreases according to an exponential law, as shown in Equation (2). In Equation (2), σ and A means the equivalent surface charge density and the initial surface charge density, respectively.…”

Section: Common Methods For Trap Distribution Analysis Using Charge Dementioning

confidence: 99%

“…Mineral oil ageing or deterioration is normally associated with oxidation, as shown in the following chemical reactions (1), (2), (3) [35][36][37]. Where RH: hydrocarbon compounds; R•, RO•, RO 2 •, H•: free radicals; ROOR: alkyl peroxide; ROOH: hydrogen peroxide. The ageing products are mainly the gaseous (CO, CO 2 , and volatile hydrocarbons), liquid (RCHO, R-CO-R, ROH, RCOOH, tars, and H 2 O) and sludge.…”

Section: Comparison Analysis Of the Trap Distribution Using The Impromentioning

confidence: 99%

“…It is reported that the space charge has great effect on the insulation property of the oil-paper insulation in convert transformer [1][2][3][4][5]. Space charge means the excess electric charge over a region of space, rather than distinct point-like charges [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Space charge means the excess electric charge over a region of space, rather than distinct point-like charges [6,7]. Space charge could severely distort the local electrical field, which causes the material degradation or leads to the insulation breakdown [1][2][3]. Besides, oil-paper insulation gradually degrades under the combined stresses of thermal, electrical, and chemical during transformer routine operation [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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New Method for Shallow and Deep Trap Distribution Analysis in Oil Impregnated Insulation Paper Based on the Space Charge Detrapping

et al. 2018

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Abstract:Space charge has close relation with the trap distribution in the insulation material. The phenomenon of charges trapping and detrapping has attracted significant attention in recent years. Space charge and trap parameters are effective parameters for assessing the ageing condition of the insulation material qualitatively. In this paper, a new method for calculating trap distribution based on the double exponential fitting analysis of charge decay process and its application on characterizing the trap distribution of oil impregnated insulation paper was investigated. When compared with the common first order exponential fitting analysis method, the improved dual-level trap method could obtain the energy level range and density of both shallow traps and deep traps, simultaneously. Space charge decay process analysis of the insulation paper immersed with new oil and aged oil shows that the improved trap distribution calculation method can distinguish the physical defects and chemical defects. The trap density shows an increasing trend with the oil ageing, especially for the deep traps mainly related to chemical defects. The greater the energy could be filled by the traps, the larger amount of charges could be trapped, especially under higher electric field strength. The deep trap energy level and trap density could be used to characterize ageing. When one evaluates the ageing condition of oil-paper insulation using trap distribution parameters, the influence of oil performance should not be ignored.

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Section: Methodsmentioning

confidence: 99%

Section: Common Methods For Trap Distribution Analysis Using Charge Dementioning

confidence: 99%

Section: Comparison Analysis Of the Trap Distribution Using The Impromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New Method for Shallow and Deep Trap Distribution Analysis in Oil Impregnated Insulation Paper Based on the Space Charge Detrapping

et al. 2018

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Applications and Prospects of Online Insulation Monitoring Technique Based on Broadband Frequency Response for Transformers in Voltage Source Converter System

Zheng

Zhang

2023

Lecture Notes in Electrical Engineering

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Effects of aluminum nitride nanoparticles on the space charge behavior of cellulose paper

et al. 2016

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Interface charge behavior of multi-layer oil–paper insulation under DC and polarity reversal voltages

Cited by 28 publications

References 16 publications

New Method for Shallow and Deep Trap Distribution Analysis in Oil Impregnated Insulation Paper Based on the Space Charge Detrapping

New Method for Shallow and Deep Trap Distribution Analysis in Oil Impregnated Insulation Paper Based on the Space Charge Detrapping

Applications and Prospects of Online Insulation Monitoring Technique Based on Broadband Frequency Response for Transformers in Voltage Source Converter System

Effects of aluminum nitride nanoparticles on the space charge behavior of cellulose paper

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