A review on factors that affect surface charge accumulation and charge-induced surface flashover

Yuan, Mengqiang; Zou, Liang; Li, Zongze; Pang, Long; Zhao, Tong; Zhang, Li; Zhou, Jierui; Xiao, Peng; Akram, Shakeel; Wang, Zezhong; He, Shuijian

doi:10.1088/1361-6528/abe9e3

Cited by 32 publications

(28 citation statements)

References 94 publications

(161 reference statements)

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“…Charge accumulation is a very important factor in the acceleration of insulation deterioration [16][17][18], which distorts the electric field, causing flashover [19][20][21][22] and promoting the initiation and growth of the electrical tree [23]. Previous research has illustrated that the charges may accelerate under the pulsed voltage (100-300 Hz) and collide with the molecular chain, breaking the microstructure of the insulation material and resulting in the increase of the fractal dimension of the electrical tree [24].…”

Section: Introductionmentioning

confidence: 99%

Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times

Zhang

Wei

et al. 2021

High Voltage

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High-voltage electronic equipment is widely used in power systems, which normally operate under the pulse voltage condition. However, compared to DC or AC stress, the electrical insulation suffers a more severe ageing process under a pulse voltage with steep edges and so may cause electrical equipments to fail early. The charge behaviour in polyimide under the pulse voltage with different edge times was investigated in this study. The experimental results show that charges vibrate at the pulse edge, while the amplitude of charge vibration increases with decreasing edge times. Furthermore, the detected vibration signal is strong within the nanosecond edge times, while being negligible in the microsecond range. Notably, the amplitude of charge vibration at the falling edge is larger than that at the rising edge in the presence of the column-plate electrode. It is believed that the resultant force acting on the charge increases drastically at the pulse edges, leading to the charge movement and the generation of ultrasonic waves, with the resultant force becoming larger when the edge times decrease. Charge vibration behaviour is harmful to the microstructure of insulation materials, and so it may be concluded that the rise and fall times of the pulse voltage play an important role in insulation failure.

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Section: Introductionmentioning

confidence: 99%

Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times

Zhang

Wei

et al. 2021

High Voltage

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“…The reason to explain this contradiction is that the “surface” component is blocked by the shed. When the “air” component of streamer bypasses the shed, sometimes it might propagate along the “surface” propagation path due to the attraction of the surface charge [ 19 , 20 , 21 ], or sometimes it propagated along the “air” propagation path, or both cases existed in the one streamer discharge. Due to the larger fillet diameters of the curved profiles of the insulators A and B, the air component is more easily attracted by the surface charge and develops along the insulating material surface.…”

Section: Resultsmentioning

confidence: 99%

“…The reason to explain this contradiction is t "surface" component is blocked by the shed. When the "air" component of stream passes the shed, sometimes it might propagate along the "surface" propagation pa to the attraction of the surface charge [19][20][21], or sometimes it propagated along th propagation path, or both cases existed in the one streamer discharge. Due to the fillet diameters of the curved profiles of the insulators A and B, the air component i The ICCD camera (PI MAX3) made by Princeton Instruments was used to tak tographs of the micromorphology of the streamer propagation along the insulator to the weaknesses of the streamer discharge, each photograph recorded the three process of streamer discharges in order to make the photograph clearer.…”

Section: Light Emissionmentioning

confidence: 99%

Streamer Propagation along the Insulator with the Different Curved Profiles of the Shed

et al. 2022

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The flashover along the insulator endangers the reliable operation of the electrical power system. The reasonable curved profiles of the shed could improve the flashover voltage, which would reduce power system outages. The research on the influence of the curved profiles of the shed on the streamer propagation along the insulator made of polymer was presented in the paper. The streamer propagation “stability” field, path, and velocity affected by the curved profiles of the shed, were measured by ultraviolet camera, ICCD camera, and photomultipliers. The “surface” component of the streamer is stopped at the shed with the different curved profiles, while the “air” component could go round the shed and reach the cathode. The streamer propagation “stability” fields are inversely proportional to the curved profiles of the shed. The streamer propagation velocities are proportional to the curved profiles of the shed. The relationship between the streamer propagation and the flashover propagation was discussed in depth. The subsequent flashover propagation is greatly affected by the streamer propagation path and “stability” field. Furthermore, the influence of the material properties on the streamer propagation path was also discussed in depth.

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“…The exploration of highly sensitive online detection methods is a new challenge faced by researchers, and may also be a new direction for future research in this field [6]. Moreover, the charge accumulation at AC voltage, which has been discussed and verified by researchers in recent years, may result in a local electric field enhancement and lower the flashover voltage [21–27]. However, to the authors’ knowledge, there is still no direct evidence to verify this finding.…”

Section: Discussionmentioning

confidence: 99%

Defects and failure types of solid insulation in gas‐insulated switchgear: In situ study and case analysis

et al. 2021

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The gas-insulated switchgear (GIS) has been widely used in modern ultra-high voltage systems. However, once it fails, its fully enclosed feature brings challenges in its diagnosis and maintenance. As the failure rate of GIS due to insulator failure has been increasing in recent years, it is necessary and important to understand the commonly existing defects presented in the insulator. First, the manufacturing process of GIS insulators is introduced here. The defect types commonly existing in the insulator are categorised. The failure of GIS due to insulator defects that occurred in recent years are reviewed and discussed. The content in this study is useful for engineers and scientists to study on the GIS solid insulation defects and their failure mechanisms.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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A review on factors that affect surface charge accumulation and charge-induced surface flashover

Cited by 32 publications

References 94 publications

Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times

Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times

Streamer Propagation along the Insulator with the Different Curved Profiles of the Shed

Defects and failure types of solid insulation in gas‐insulated switchgear: In situ study and case analysis

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