Voltage harmonic content of long artificially generated electrical arc in out-door experiment at 500 kV towers

Tavares, Maria Cristina; Talaisys, J.; Camara, Alessandra S. B.

doi:10.1109/tdei.2014.6832243

Cited by 22 publications

(10 citation statements)

References 6 publications

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“…Such harmonic content has been investigated by several researchers [11–15]. To illustrate this behaviour, Table 2 [16] shows the harmonic content of electric arcs similar to secondary arc generated artificially [17].…”

Section: Spar Basics Conceptsmentioning

confidence: 99%

Comparison between traditional single‐phase auto reclosing and adaptive technique based on harmonic content measurement

Dias

Tavares

2017

IET Generation, Transmission & Distribution

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Section: Spar Basics Conceptsmentioning

confidence: 99%

Comparison between traditional single‐phase auto reclosing and adaptive technique based on harmonic content measurement

Dias

Tavares

2017

IET Generation, Transmission & Distribution

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“…Although physical experiments can be performed to study the secondary arc characteristics directly, such experiments are restricted by environmental conditions, require large investments, and are insufficiently flexible [4][5][6][7]. In a circuit simulation model, the fault arc is very often represented by a time-varying resistor, and it is described via nonlinear differential equations [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Space–Time Characteristics of Plasma Initialization in a Secondary Arc

Huang

Jiang

et al. 2019

Energies

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A numerical model based on the finite element simulation software COMSOL was developed to investigate the secondary arc that can limit the success of single-phase auto-reclosure solutions to the single-phase-to-ground fault. Partial differential equations accounting for variation of densities of charge particles (electrons, positive and negative ions) were coupled with Poisson’s equation to consider the effects of space and surface charges on the electric field. An experiment platform was established to verify the numerical model. The brightness distribution of the experimental short-circuit arc was basically consistent with the predicted distribution of electron density, demonstrating that the simulation was effective. Furthermore, the model was used to assess the particle density distribution, electric field variation, and time dependence of ion reactions during the short-circuit discharge. Results showed that the ion concentration was higher than the initial level after the short-circuit discharge, which is an important reason for inducing the subsequent secondary arc. The intensity of the spatial electric field was obviously affected by the high-voltage electrode at the end regions, and the intermediate region was mainly affected by the particle reaction. The time correspondence between the detachment reaction and the ion source generated in the short-circuit discharge process was basically consistent, and the detachment reactions were mainly concentrated in the middle area and near the negative electrode. The research elucidates the relevant plasma process of the secondary arc and will contribute to the suppression of it.

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“…The reliable extinction of the secondary arc is very important for the successful implementation of single-phase automatic reclosing [1][2][3]. At present, a great deal of research has been carried out on the physical characteristics [4][5][6][7] and mathematical model [8][9][10][11][12] of short-circuit arc and secondary arc. Since the diameter of the short-circuit arc channel is much larger than that of the secondary arc channel, the initial position of the secondary arc in the short-circuit arc channel is random.…”

Section: Introductionmentioning

confidence: 99%

Space Plasma Distribution Effect of Short-Circuit Arc on Generation of Secondary Arc

Cong

et al. 2018

Energies

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Secondary arc is more severe in the ultra-high voltage (UHV) power grid. However, the mechanism for the generation process of secondary arc at the extinction moment of a short-circuit arc is not yet clear. It is of great theoretical significance and technological application value to study the generation mechanism and dynamic physical characteristics of secondary arc, and further to develop effective suppression technology. In this article, an arc numerical simulation model based on the coefficient partial differential equations combining with classical drift-diffusion model was established, and the implementation method based on the finite element software COMSOL (COMSOL Multiphysics 5.2a, COMSOL Inc., Stockholm, Sweden) was given. Then, the transient analysis method was applied to simulate the generation, diffusion and dissipation phenomena of the short-circuit arc strike, and further to explore the electric field, microscopic particle spatial distribution and reaction process during the arc discharge process. The simulation results show that the development of short-circuit arc mainly includes two processes: corona discharge and arc discharge, of which the former has a very short duration and the latter is caused by short-circuit. During the discharge process, the electron density first increases and then decreases, which is different from the general characteristics of streamer discharge. Although the concentration distribution curve of the positive ions and negative ions has the same trend, there are subtle differences. The diffusion effect of space ions in the initial discharge stage is almost zero, while radial diffusion direction in the peak discharge stage and axial direction in the late discharge stage. The electric field intensity in space has an S-shaped upward trend during discharge. The time relationship of the ion source generated by the neutralization reaction and by the short-circuit arc discharge are basically the same, and the rate of neutralization reaction is lowest near the electrode. When the ionic reaction is approaching the end of the simulation, the ionic concentration is higher than the initial level, which proves that the space ionic concentration is increased due to the short-circuit discharge, and providing the necessary environmental conditions for the subsequent generation of the secondary arc.

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Voltage harmonic content of long artificially generated electrical arc in out-door experiment at 500 kV towers

Cited by 22 publications

References 6 publications

Comparison between traditional single‐phase auto reclosing and adaptive technique based on harmonic content measurement

Comparison between traditional single‐phase auto reclosing and adaptive technique based on harmonic content measurement

Numerical Modeling of Space–Time Characteristics of Plasma Initialization in a Secondary Arc

Space Plasma Distribution Effect of Short-Circuit Arc on Generation of Secondary Arc

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