Motion behavior and deactivation method of free-conducting particle around spacer between diverging conducting plates under dc voltage in atmospheric air

Khan, Yasin; Sakai, K.; Lee, E.K.; Suehiro, Junya; Hara, Masanori

doi:10.1109/tdei.2003.1207471

Cited by 44 publications

(31 citation statements)

References 6 publications

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“…Without the influence of the gas buoyancy, if + > is establish, the conducting particle will float from the ground electrode surface and eventually reach the high voltage electrode. When the particles approach the high voltage electrode, the gap discharge will be produced between the particle and the high voltage electrode [9][10][11]. This discharge will lead to two results: 1) The particle changes the polarity； 2) The partial discharge causes the gap breakdown.…”

Section: Fig 2 Test Set-upmentioning

confidence: 99%

Investigation of states recognition of motion conducting particles under DC voltages using the pulse current method

Dong

Liu

Gao

et al. 2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Gas insulated switchgear (GIS) is widely used in the power system, due to its high reliability and great insulation characteristics. However, partial discharge (PD) caused by particle contamination in GIS threatens the stability and reliability of power system. Experiments have been carried out to observe the motion trials of single macroscopic conducting particle under DC voltages. Simultaneously, the pulse current signals have been measured. The result shows that the dominant frequency of PD signals for conducting particle under DC voltage is in the range of 0~7 MHz. In this paper, a method that recognized the particle states is proposed based on pulse characteristic parameter maps which consist of time intervals between pulses (Δt), discharge numbers (n) and discharge charges (q). The result indicates that pulse characteristic parameter maps can be used to recognize the motion states of metallic particle.

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Section: Fig 2 Test Set-upmentioning

confidence: 99%

Investigation of states recognition of motion conducting particles under DC voltages using the pulse current method

Dong

Liu

Gao

et al. 2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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“…The investigations on GIS insulation show that drastic degradation of system insulation is caused by metallic particles in both dc and ac GIS [l, 21. As a general rule, the flashover breakdown voltage along the spacer surface is much lower than the gap breakdown voltage [3]. So, it can be considered that spacer surface is obviously the weakest point of insulation in GIs.…”

Section: Introductionmentioning

confidence: 99%

Metal inserted spacer influence on particle motion in nonuniform electrical field under DC voltage

Jia

Zhang

Zhu

et al. 2005

Proceedings of 2005 International Symposium on Electrical Insulating Materials, 2005. (ISEIM 2005).

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In Gas Insulated Systems (GIs), particles near spacer in GIS tend to cause apparatus faults by leading flashover breakdown along spacer surface. Metal inserted spacer as a method is designed in purpose to prevent particles from lifting and adhering to spacer. The effect of electrode inserted is investigated by calculation of electrostatic force acting on spherical particles in 2-dimension model through Finite Element Method (FEM). Three type spacers with different shapes are studied and the results show that metal inserted spacer is effective in hurtless treatment of particles in dc CIS.

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“…In several cases, the rigidity of gases is as low as 10% of the uncontaminated value [4][5][6][7]. The insulation destruction of DC GIS/GIL caused by contaminated metal particles should be addressed more carefully than that of alternating current GIS/GIL because of an increased motion activity of such particles [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on the Motion and Discharge Behavior of Free Conducting Wire Particle in DC GIL

Wang¹,

Wang²,

Ni³

et al. 2017

Journal of Electrical Engineering and Technology

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-This study aims to restrain free conducting wire-type particles which are commonly and dangerously existing within DC gas-insulated transmission lines. A realistic platform of a coaxial cylindrical electrode was established by using a high-speed camera and a partial discharge (PD) monitor to observe the motion, PD, and breakdown of these particles. The probabilities of standing or bouncing, which can be affected by the length of the particles, were also quantitatively examined. The corona images of the particles were recorded, and particle-triggered PD signals were monitored and extracted. Breakdown images were also obtained. The air-gap breakdown with the particles was subjected to mechanism analysis on the basis of stream theory. Results reveal that the lifting voltage of the wire particles is almost irrelevant to their length but is proportional to the square root of their radius. Short particles correspond to high bouncing probability. The intensity and frequency of PD and the micro-discharge gap increase as the length of the particles increases. The breakdown voltage decreases as the length of the particles decreases.

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Motion behavior and deactivation method of free-conducting particle around spacer between diverging conducting plates under dc voltage in atmospheric air

Cited by 44 publications

References 6 publications

Investigation of states recognition of motion conducting particles under DC voltages using the pulse current method

Investigation of states recognition of motion conducting particles under DC voltages using the pulse current method

Metal inserted spacer influence on particle motion in nonuniform electrical field under DC voltage

Experimental Studies on the Motion and Discharge Behavior of Free Conducting Wire Particle in DC GIL

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