Nanoparticle effects on creeping flashover characteristics of oil/pressboard interface

Lv, Yuzhen; Zhou, You; Li, C.; Ma, Kai; Wang, Q.; Wang, W.; Zhang, S.; Jin, Zhiyang

doi:10.1109/tdei.2013.004151

Cited by 49 publications

(30 citation statements)

References 29 publications

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“…needle bed is the smallest under these conditions. Similar to the results of Lv et al () and Zhou (), there is a moderate SD in the breakdown voltage of the substances.…”

Section: Resultssupporting

confidence: 88%

“…The impulse voltage generator can generate an impulse voltage waveform of 1.2/50 μs. This waveform is commonly used in the literature (Deng, He, & Ma, ; Lv, Zhou, & Li, ).…”

Section: Methodsmentioning

confidence: 99%

“…A voltage was recorded as the breakdown voltage value if it was able to break down the needle bed in each of the five trials. Using the method of Lv et al () and Zhou (), we repeated this process six times and obtained six breakdown voltage values. Then, we obtained the average value of the six replicates and the SD .…”

Section: Methodsmentioning

confidence: 99%

“…The impulse voltage generator can generate an impulse voltage waveform of 1.2/50 μs. This waveform is commonly used in the literature (Deng, He, & Ma, 2011;Lv, Zhou, & Li, 2014). Figure S1 TA B L E 2 Properties of conifer needles Note: Each kind of conifer needle was repeatedly measured 10 times, and the average value and SD were taken.…”

Section: Devicementioning

confidence: 99%

See 3 more Smart Citations

Investigation of lightning ignition characteristics based on an impulse current generator

Feng

Shen

2019

Ecology and Evolution

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Lightning strike is an important ignition source of forest fires. Artificial lightning discharge is a method for studying lightning fires. However, there is not enough data on the ignition of combustible materials caused by artificial lightning discharge. Previous studies on lightning ignition have focused on the heating and ignition effects of long continuing current (LCC), but the function of the impulse current that occurs before the LCC has not been taken into account. In this paper, an impulse current generator of 8/20 μs was used to simulate the ignition effect of impulse current on conifer needle beds. Different current waveforms have different ignition characteristics. We compared five kinds of conifer needle beds. The average of the current needed to ignite the needle bed of Larix gmelinii (Ruprecht) Kuzeneva was the smallest, and the average of the breakdown voltage was the smallest for the needle bed of Pinus massoniana Lamb. The total energy input to the conifer needle beds was fitted as a multiple log‐linear regression model. The heating energy proportion value varies with different bulk densities, current amplitudes, and moisture contents. Based on this data, the heating energy of the impulse current transferred to the needles can be predicted. This information in conjunction with previous research on LCC was used to derive a lightning ignition prediction model of the full waveform for conifer needle beds.

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“…needle bed is the smallest under these conditions. Similar to the results of Lv et al () and Zhou (), there is a moderate SD in the breakdown voltage of the substances.…”

Section: Resultssupporting

confidence: 88%

“…The impulse voltage generator can generate an impulse voltage waveform of 1.2/50 μs. This waveform is commonly used in the literature (Deng, He, & Ma, ; Lv, Zhou, & Li, ).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Devicementioning

confidence: 99%

See 2 more Smart Citations

Investigation of lightning ignition characteristics based on an impulse current generator

Feng

Shen

2019

Ecology and Evolution

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“…The last ones additionally evaluated the specific magnetisation of other nanofluid to open new venues in optimising conventional electrotechnic constructions or to design novel devices [67]. Creeping discharge and flashover characteristics of the oil/pressboard interface under AC and impulse voltages was studied by Lv et al for a nanofluid based on TiO 2 nanoparticles [68], obtaining an increase of the shallow trap density and a lower shallow trap energy level of oil-impregnated pressboard which can improve the creeping flashover strength of oil/pressboard interface.…”

Section: Accelerated Thermal Ageing In Laboratorymentioning

confidence: 99%

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Fernández-Diego¹,

Fernández²,

Fernández³

et al. 2018

Simulation and Modelling of Electrical Insulation Weaknesses in Electrical Equipment

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Power transformers life is limited fundamentally by the insulation paper state, which can be analysed through different techniques such as furanic compound concentration, dissolved gases, methanol concentration, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, refractive index of cellulose fibres, degree of polymerisation or tensile strength. The two last techniques provide the best way to evaluate mechanical resistance of insulation paper. This chapter describes briefly the most remarkable studies about post-mortem assessment and thermal ageing tests in which mechanical properties are some of the characteristics evaluated to determine paper degradation. This work also gathers the main relationships developed until now to relate different by-products generated during transformer operation with loss of paper mechanical properties. Finally, this chapter defines the future approaches, which could be used to study paper degradation.

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Experimental analysis of artificial lightning breakdown and ignition characteristics in grassland

Feng

Dong

Shen

2020

Theor Appl Climatol

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Nanoparticle effects on creeping flashover characteristics of oil/pressboard interface

Cited by 49 publications

References 29 publications

Investigation of lightning ignition characteristics based on an impulse current generator

Investigation of lightning ignition characteristics based on an impulse current generator

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Experimental analysis of artificial lightning breakdown and ignition characteristics in grassland

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