Effect of ambient temperature on electrical treeing and breakdown phenomenon of polypropylene with repetitive pulse voltage

Du, B. X.; Zhu, Lewei; Han, Tao

doi:10.1109/tdei.2017.006229

Cited by 18 publications

(16 citation statements)

References 38 publications

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“…The accumulated damage was used to analyze the electrical treeing characteristics. The accumulated damage refers to the number of pixels in the area covered by the electrical tree, which can be used to characterize the damage area of electrical tree to insulating materials, and to describe the development trend of electrical tree in space [29,32]. The accumulated damage was calculated using Matlab language.…”

Section: Test Samples and Electrode Arrangementmentioning

confidence: 99%

“…In addition, in the process of electrical tree growth, some of the electrical tree channels are carbonized, and the carbonization channel delivers charges as a conductive current to the end of the channel, enhancing the electric field strength [42]. The deeper trap captures the transport charges in the carbonized electrical tree channels, reducing the electric field strength at the end of the channel, thereby decreasing the growth of the electrical tree [29]. The carrier migration process is closely related to the trap distribution of the composite material.…”

Section: Mechanism Of Polycyclic Compounds Fillers Inhibiting Electrimentioning

confidence: 99%

“…The maximum long-term design temperature of XLPE cables is generally 90 • C, and the operating temperature is usually around 50-60 • C [27]. It was found that high temperature affected the charge movement and partial discharge characteristics in the insulation, thus affecting the electrical treeing process [28,29]. However, most studies on polycyclic compounds are carried out at room temperature, and the effect of high temperature on polycyclic compounds still needs to be further studied.In this paper, XLPE is employed as the polymer matrix, and three types of polycyclic compounds with the content of 0.5% are added into the XLPE.…”

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confidence: 99%

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Effect of Polycyclic Compounds Fillers on Electrical Treeing Characteristics in XLPE with DC-Impulse Voltage

Zhu

et al. 2019

Energies

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Electrical tree is an important factor in the threat of the safety of cross-linked polyethylene (XLPE) insulation, eventually leading to the electrical failure of cables. Polycyclic compounds have the potential to suppress electrical treeing growth. In this paper, three types of polycyclic compounds, 2-hydroxy-2-phenylacetophenone, 4-phenylbenzophenone, and 4,4′-difluorobenzophenone are added into XLPE, denoted by A, B, and C. Electrical treeing characteristics are researched with DC-impulse voltage at 30, 60, and 90 °C, and the trap distribution and carrier mobility are characterized. It has been found that although three types of polycyclic compounds can all suppress the electrical tree propagation at different voltages and temperatures, the suppression effect of these polycyclic compounds with the same DC-impulse polarity is worse than with the opposite polarity. As the temperature increases, the suppression effect becomes weak. The energy level and deep trap density are the largest in XLPE-A composite, leading to a decrease in the charge transportation and resulting in the suppression of electrical treeing growth. Experimental results reveal that the polycyclic compound A has great application prospects in high voltage direct current (HVDC) cables.

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Section: Test Samples and Electrode Arrangementmentioning

confidence: 99%

Section: Mechanism Of Polycyclic Compounds Fillers Inhibiting Electrimentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of Polycyclic Compounds Fillers on Electrical Treeing Characteristics in XLPE with DC-Impulse Voltage

Zhu

et al. 2019

Energies

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“…Therefore, we set 70 • C to study the effect of polycyclic compounds on electrical trees in PP. At the same time, because PP has a higher melting point of about 150 • C, it can increase the operating temperature to about 90 • C [30]. Therefore, a temperature of 90 • C was set to investigate whether the polycyclic compounds can still inhibit the electrical tree at this temperature.…”

Section: B Electrical Treeing Experimentsmentioning

confidence: 99%

“…At the same time, during the operation of the HVDC cable, the wire core will generate more heat due to the high current, which will cause the cable to work in a high temperature environment [28], [29]. In our previous works, we studied the effects of impulse superimposed DC voltage and temperature on the growth and breakdown characteristics of electrical tree in PP respectively [30], [31]. It was found that the impulse superimposed DC voltage and high temperature accelerate the electrical tree degradation.…”

Section: Introductionmentioning

confidence: 99%

Polycyclic Compounds Affecting Electrical Tree Growth in Polypropylene Under Ambient Temperature

Zhu

Hou

2020

IEEE Access

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Polypropylene (PP) has great potential to be used as recyclable high-voltage direct current (HVDC) cable insulation material. Electrical tree is the key factor that leads to cable insulation failure and limits the increase of HVDC transmission voltage level. In this study, three different polycyclic compounds, namely 4,4'-bis(dimethylamino)phenylazo, 2-hydroxy-2-phenylacetophenone and 4-phenylbenzophenone, are added into PP matrix with the addition content of 0.1 wt%. The electrical treeing experiments are conducted under impulse superimposed DC voltage at 30, 70 and 90 • C. Then the polycyclic compound with the best effect on inhibiting electrical tree is selected, and its filling ratio is further changed from 0.1 wt% to 0.3 wt% to get the optimal inhibition effect. It is found that the addition of 2-hydroxy-2-phenylacetophenone can inhibit the electrical tree degradation. However, the addition of 4-phenylbenzophenone and 4,4'-bis(dimethylamino)benzene will increase the electrical tree length and accumulated damage. As the content of 2-hydroxy-2-phenylacetophenone increases, the electrical tree length and accumulated damage decrease firstly, and then increase. The effect of polycyclic compounds on the electrical tree degradation is affected by the relative polarity of impulse superimposed DC voltage and temperature. The experimental results reveal that adding 0.1 wt% 2-hydroxy-2-phenylacetophenone polycyclic compound to PP can effectively inhibit the electrical tree degradation, which has great potential for application in recycle HVDC cables.

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Nondestructive 3D Imaging of Microscale Damage inside Polymers—Based on the Discovery of Self‐Excited Fluorescence Effect Induced by Electrical Field

et al. 2023

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The development of high‐precision, non‐destructive, and three‐dimensional (3D) in situ imaging of micro‐scale damage inside polymers is extremely challenging. Recent reports suggest that 3D imaging technology based on micro‐CT technology causes irreversible damage to materials and is ineffective for many elastomeric materials. In this study, it is discovered that electrical trees inside silicone gel induced by an applied electric field can induce a self‐excited fluorescence effect. Based on this, high‐precision, non‐destructive, and 3D in situ fluorescence imaging of polymer damages is successfully achieved. Compared with the current methods, the fluorescence microscopic imaging method enables slicing of the sample in vivo with high‐precision operation, realizing the precise positioning of the damaged area. This pioneering discovery paves the way for high‐precision, non‐destructive, and 3D in situ imaging of polymer internal damage, which can solve the problem of internal damage imaging in insulating materials and precision instruments.

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Effect of ambient temperature on electrical treeing and breakdown phenomenon of polypropylene with repetitive pulse voltage

Cited by 18 publications

References 38 publications

Effect of Polycyclic Compounds Fillers on Electrical Treeing Characteristics in XLPE with DC-Impulse Voltage

Effect of Polycyclic Compounds Fillers on Electrical Treeing Characteristics in XLPE with DC-Impulse Voltage

Polycyclic Compounds Affecting Electrical Tree Growth in Polypropylene Under Ambient Temperature

Nondestructive 3D Imaging of Microscale Damage inside Polymers—Based on the Discovery of Self‐Excited Fluorescence Effect Induced by Electrical Field

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