Mode of free-conducting particle motion and particle-triggered breakdown mechanism in non-uniform field gaps

Sakai, K.; Abella, D.L.; Suehiro, Junya; Hayashi, Noriyuki; Hara, Masanori

doi:10.1109/ceidp.2000.885307

Cited by 9 publications

(13 citation statements)

References 10 publications

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“…The electric field is calculated by the approximate formula [10].

λ = 0.85 ()(, 1 + \frac{d}{r}) ()(, \frac{d}{r} \leq 3)

λ = 0.45 \frac{d}{r} \times \frac{\ln \frac{6 d}{r}}{\ln \frac{d}{r}} false(3 < \frac{d}{r} < 500)

Table 1 shows electrode design dimensions.…”

Section: Methodsmentioning

confidence: 99%

“…From the analysis above, the force acting on the particle and the collision process are complex when the particle is moving. It is difficult to solute trajectory by (7)- (10), which are obtained via a finite element simulation in the work.…”

Section: Metal Particles Motion Processmentioning

confidence: 99%

“…In order to eliminate the metal particles in GIS, particle capture traps are usually designed in the production with the withstand voltage test before its operation, which enables particles to move to the trap [1][2][3][4][5][6][7][8][9]. In order to optimise particle traps and apply withstand tests, there are many researches on particle movement characteristics [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In reference [10,12], a wedge of electrode structure was established after analysing the electric field among insulator, electrodes, and gas in GIS.…”

Section: Introductionmentioning

confidence: 99%

“…In order to optimise particle traps and apply withstand tests, there are many researches on particle movement characteristics [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In reference [10,12], a wedge of electrode structure was established after analysing the electric field among insulator, electrodes, and gas in GIS. Based on the particle charging theory by N. N. Lebedev [18], the particle movement pattern is obtained.…”

Section: Introductionmentioning

confidence: 99%

“…In order to optimise particle traps and apply withstand tests, there are many researches on particle movement characteristics [10–26]. In reference [10, 12], a wedge of electrode structure was established after analysing the electric field among insulator, electrodes, and gas in GIS.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

Sun

Chen

et al. 2019

High Voltage

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Metal particles, difficult to be eliminated in gas-insulated metal-enclosed switchgear (GIS), can cause GIS discharge and breakdown between electrodes, or flashover on the insulator surface. It influences the development of ultra-high voltage (UHV) projects. Therefore, the work optimised the model of metal particle movement under AC voltage, studying the metal particle movement and distribution characteristics between ball-plane electrodes through experiment and simulation. Under AC voltage, the particle jumps on a small scale on the plane surface. With the increase of voltage, the jump amplitude increases. However, the collision frequency decreases until the particle collides with the ball electrode. When the initial phase angle of power changes, the particle-moving pattern is symmetrical in the angle ranging from 0 to 180°, and from 180 to 360°. The collision frequency changes slightly with the increase of jump amplitude when the angel ranges from 0 to 120°.

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“…The electric field is calculated by the approximate formula [10].

λ = 0.85 ()(, 1 + \frac{d}{r}) ()(, \frac{d}{r} \leq 3)

λ = 0.45 \frac{d}{r} \times \frac{\ln \frac{6 d}{r}}{\ln \frac{d}{r}} false(3 < \frac{d}{r} < 500)

Table 1 shows electrode design dimensions.…”

Section: Methodsmentioning

confidence: 99%

Section: Metal Particles Motion Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

Sun

Chen

et al. 2019

High Voltage

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show abstract

Partial discharge characteristics of free moving metal particles in gas insulated systems under DC and AC voltages

Sun

Fan

et al. 2022

IET Generation Trans & Dist

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Free conductive particles in a gas-insulated metal-enclosed system produce partial discharges during movement, resulting in insulator flashover and insulation failures. This study focuses on the partial discharge property of free conductive particles under DC and AC voltages. The relationship between the micro-discharge property and the intrinsic properties of the particles was obtained based on experimental tests. The results show that under DC conditions, the local discharge property varies linearly with particle size and density. The discharge probability of particles in SF6 is significantly reduced compared with that in air, while the discharge magnitude rapidly increases if the lift voltage exceeds a certain value. Under AC conditions, the partial discharge generated by the particle becomes less random, and the amplitude and phase angle of the discharge are not significantly related. As the size of the electrode decreases, the partial discharge current generated by the particles on the surface of the electrode with an uneven electric field increases significantly. This research provides a basis for the optimization of withstand voltage test method and its applications.

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Particle trajectories and its charging behaviors: effect of gas type and electric field

et al. 2020

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Conductive particles in the gas insulated transmission lines (GIL) induce the breakdown between electrodes or the flashover along insulators. To solve the problem of particle moving and realize the particle-moving regulation, particle trajectories should firstly be determined in air and SF6. This paper presents the results of particle trajectories and its charging behaviors at vacuum and SF6, respectively. Metal particles with different materials and sizes were introduced and the charge quantity was calculated. The results showed that the particle lift-off electric field in SF6 was higher than that in air under the same gas pressure, that is, the charge on particle in SF6 was about 0.789 times lower than that in air under the same condition. Besides, the lift-off electric field of particle increased with the pressure increase of SF6. The charge on particle was affected by the concentration of electric field near particle and the electrical negative features of SF6. The work provided the data support for development of DC GIL in particle defect suppression.

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Mode of free-conducting particle motion and particle-triggered breakdown mechanism in non-uniform field gaps

Cited by 9 publications

References 10 publications

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

Partial discharge characteristics of free moving metal particles in gas insulated systems under DC and AC voltages

Particle trajectories and its charging behaviors: effect of gas type and electric field

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