Motion of metallic particles in gas insulated systems

Holmberg, M.; Gubanski, S.M.

doi:10.1109/57.689268

Cited by 18 publications

(10 citation statements)

References 10 publications

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“…The particle charge quantity and velocity variations in the collision process are discussed, respectively, as follows. The charge quantity on the particle is considered constant between each consecutive collision [14]. However, its charge quantity varies in the complicated electrical process when the particle collides with walls.…”

Section: Collision Between Particle and Wallmentioning

confidence: 99%

Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB

Sima

Shao

Sun

et al. 2019

IET Science, Measurement & Technology

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The development of high-voltage direct current circuit breaker (HVDCCB) has progressed rapidly. One of the major reasons for the failure of a circuit breaker is the metallic particle contamination. An enhanced mathematical model is proposed to simulate the motion dynamics of a spherical copper particle in the break of sulphur hexafluoride (SF 6 ) HVDCCB. By linking COMSOL and MATLAB, the interaction between particle motion and electric field distribution and plastic random movement in the collision process is considered. The effects of voltage magnitude and particle size on the particle motion are discussed. By means of statistical methods, the obtained findings show that, as voltage magnitude decreases or particle size increases, the particle-anode collision frequency decreases, and the particle-anode collision region increases in the x-direction but decreases in the y-direction. The accuracy of the proposed model is verified by experimental observations via high-speed video camera.

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Section: Collision Between Particle and Wallmentioning

confidence: 99%

Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB

Sima

Shao

Sun

et al. 2019

IET Science, Measurement & Technology

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“…where: ρ = particle density (kg/m 3 ), g = gravity acceleration (9.8 m/s 2 ), v = particle velocity, and ɳ = viscosity constant [3], [4].…”

Section:  Rvmentioning

confidence: 99%

Impact of Shape and Total of Particle to Characteristics of Partial Discharge and Breakdown Voltage on Oil Insulation in Uniform Field

Fahmi

Negara

Wahyudi

et al. 2018

JAREE

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Oil insulation is one of the insulation medium types commonly used in high voltage apparatus. This insulation is to separate between the conductive part and non-conductive part. However, oil insulation can experience decreasing of dielectric strength. It may be caused by the presence of solid particles. Therefore, the testing was conducted to obtain the effect of solid particles to characteristics of partial discharge and breakdown voltage of oil insulation. The results generally proved that the existence of solid particles can reduce the breakdown voltage value of oil insulation. In addition, the solid particles led to two types of corona on oil insulation, namely positive and negative corona.

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“…Much work has been established in the last two decades in order to understand and describe the nature of PD processes [5][6][7][8][9][10][11]. For some discharge phenomena physical models have been developed [1,4,6,8] and simulations of specific PD processes were made [8,9,[12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A generalized model for partial discharge processes based on a stochastic process approach

Heitz

1999

J. Phys. D: Appl. Phys.

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A general framework for the physical description of partial discharge (PD) processes is presented that holds for different types of PD causing defects. A PD process is treated as a stochastic process consisting of short duration discharges (point-like in time) and charge carrier drift/recombination intervals between these discharges. It is determined by few basic physical parameters and, in a stochastic process framework, can be described in a closed form by a master equation. Since usually only the fast discharges can be measured as PD signals, a restricted possibility of observing a PD process results. The link between the stochastic process and observable quantities is derived. A specific type of measurements is reported, the so-called phase-resolved partial discharge (PRPD) patterns. Here the total charge transferred during a discharge and the time or alternating current phase at which the discharge occurs are measured. Thus each discharge event is described by the two quantities, charge and phase angle. The modelling of the observation process is explicitly derived for this case. However, the used method can easily be generalized to other types of PD measurements. The proposed approach yields new possibilities for the interpretation and analysis of PD patterns. Features of PD patterns can be derived analytically from the process parameters. Conversely, quantitative information about the discharge physics can be gained from measured patterns. Some limiting cases of model parameter values leading to typical pattern features are discussed explicitly. Examples are presented that demonstrate the applicability of the model for three different discharge types (internal discharge in a gas-filled void, surface discharge in oil, corona in air).

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Motion of metallic particles in gas insulated systems

Cited by 18 publications

References 10 publications

Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB

Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB

Impact of Shape and Total of Particle to Characteristics of Partial Discharge and Breakdown Voltage on Oil Insulation in Uniform Field

A generalized model for partial discharge processes based on a stochastic process approach

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Motion of metallic particles in gas insulated systems

Cited by 18 publications

References 10 publications

Dynamic motion characteristics of a spherical copper particle in the break of SF 6 HVDCCB

Dynamic motion characteristics of a spherical copper particle in the break of SF 6 HVDCCB

Impact of Shape and Total of Particle to Characteristics of Partial Discharge and Breakdown Voltage on Oil Insulation in Uniform Field

A generalized model for partial discharge processes based on a stochastic process approach

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Product

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Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB

Dynamic motion characteristics of a spherical copper particle in the break of SF ₆ HVDCCB