Effect of voltage stabilizers on the space charge behavior of XLPE for HVDC cable application

Du, B. X.; Han, Chong

doi:10.1109/tdei.2018.007390

Cited by 53 publications

(37 citation statements)

References 15 publications

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“…There are many trap levels in the forbidden band of polymer materials. The formation of trap levels is complicated, and many factors affect the trap level, including molecular chain end groups, branches, amorphous regions and crystallization regions, polarizing groups, impurities, etc., as well as various physical chemistry effects that cause structural defects in materials [39]. After the polycyclic compound is added to the XLPE, the trap distribution and the carrier mobility behaviors change accordingly.…”

Section: Trap Distribution and Carrier Mobility Behaviorsmentioning

confidence: 99%

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: Trap Distribution and Carrier Mobility Behaviorsmentioning

confidence: 99%

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

Zhu

et al. 2019

Energies

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“…It is observed that the voltage stabilizer content within the range of 0.3–2 wt% was added in the different studies . However, to analyze the effect of low to high wt% additions, three different content of 0.5 wt% (low content), 1 wt% (average content), and 3 wt% (high content) are chosen for the present study.…”

Section: Methodsmentioning

confidence: 99%

“…In search of the new alternatives, the aromatic voltage stabilizers have received significant attention in recent years . The high electron affinity of these voltage stabilizers prevents the degradation of the polymeric materials via scavenging the high‐energy electrons.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

Chen

Paramane

Liu

et al. 2020

Polymer Engineering & Sci

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This article presents the possibility of extending the service life of XLPE insulation based on high voltage cables by blending the optimum concentration of the aromatic voltage stabilizer. The insulation performance of XLPE is analyzed by adding the 0.5, 1, and 3 wt% of 3‐aminobenzoic acid voltage stabilizer. The investigated insulation properties include the DC step‐by‐step breakdown to estimate the life exponent, space charge, DC conductivity, surface potential decay, dielectric loss, and dielectric constant measurements. The results illustrate that the 1 wt% voltage stabilizer addition increases the life exponent from 10 up to 15, which is highly suitable for the high voltage cables. Moreover, it exhibits the negligible space charge accumulation and the least electrical field distortion inside the insulation bulk. It also exhibits the lower DC conductivity by one order of magnitude comparing to the pure XLPE. The highest bandgap value of 1 wt% addition further supports its better insulating properties. Furthermore, the dielectric measurements show that the XLPE with 1 wt% voltage stabilizer exhibits the least dielectric constant and dielectric loss. The differential scanning calorimetry and thermogravimetric analysis results show that the thermal properties are significantly improved after the voltage stabilizer addition. POLYM. ENG. SCI., 60:717–731, 2020. © 2020 Society of Plastics Engineers

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“…When the applied voltage is +35 kV impulse and −25 kV DC, after the application of the impulse voltage, energy is produced by charges neutralization, exciting the thermal electrons to strike the molecular chain [36]. Since the energy required for excitation or ionization of most aromatic compounds is lower than that of PP, the aromatics will be excited or ionized by thermal electrons under the action of strong electric field, which makes it possible for polycyclic compound B to show the increased charge trap depth [32], [37]. During the process of injecting the charges, charges are easier to be trapped by the deep trap in PP-BN0.1, so the amount of the injected charges is reduced.…”

Section: A Effect Of Polycyclic Compounds On Electrical Tree Degradamentioning

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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Effect of voltage stabilizers on the space charge behavior of XLPE for HVDC cable application

Cited by 53 publications

References 15 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

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

Polycyclic Compounds Affecting Electrical Tree Growth in Polypropylene Under Ambient Temperature

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