Particle-in-cell simulation of Trichel pulses in pure oxygen

Soria‐Hoyo, C.; Pontiga, F.; Castellanos, A.

doi:10.1088/0022-3727/40/15/027

Cited by 40 publications

(16 citation statements)

References 19 publications

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“…3 shows the pulse current waveform in the electrode gap where the negative DC voltage applied to the bar is 5.0 kV. The pulse of the discharge current is characterized by a fast rising front (as short as 1.6 ns) and a slow decaying (about 60 ns), which has been confirmed by Zentner [39] and Soria [40]'s experiment. The maximum discharge current rapidly increases to 0.195 A from t 1 -t 2 .…”

Section: Individual Pulse Waveformsupporting

confidence: 57%

Numerical Simulation of the Characteristics of Electrons in Bar-plate DC Negative Corona Discharge Based on a Plasma Chemical Model

Liu¹,

Liao²,

Zhao³

2015

Journal of Electrical Engineering and Technology

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-In order to explore the characteristics of electrons in DC negative corona discharge, an improved plasma chemical model is presented for the simulation of bar-plate DC corona discharge in dry air. The model is based on plasma hydrodynamics and chemical models in which 12 species are considered. In addition, the photoionization and secondary electron emission effect are also incorporated within the model as well. Based on this model, electron mean energy distribution (EMED), electron density distribution (EDD), generation and dissipation rates of electron at 6 typical time points during a pulse are discussed emphatically. The obtained results show that, the maximum of electron mean energy (EME) appears in field ionization layer which moves towards the anode as time progresses, and its value decreases gradually. Within a pulse process, the electron density (ED) in cathode sheath almost keeps 0, and the maximum of ED appears in the outer layer of the cathode sheath. Among all reactions, R1 and R2 are regarded as the main process of electron proliferation, and R 22 plays a dominant role in the dissipation process of electron. The obtained results will provide valuable insights to the physical mechanism of negative corona discharge in air. Keywords: Corona discharge, Plasma chemical, Numerical simulation

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Section: Individual Pulse Waveformsupporting

confidence: 57%

Numerical Simulation of the Characteristics of Electrons in Bar-plate DC Negative Corona Discharge Based on a Plasma Chemical Model

Liu¹,

Liao²,

Zhao³

2015

Journal of Electrical Engineering and Technology

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“…Different values of γ have been used in the literature and they often fall in the range from 10 -3 to 10 -2 [9][10][11][15][16].…”

Section: Governing Equationsmentioning

confidence: 99%

“…The negative corona discharge has been well studied experimentally and the most distinctive feature is often regarded to as Trichel pulses [8]. Numerical modelling work on this subject has mostly been limited to 1D-1.5D models [9][10][11]. Regarding dielectric barrier discharge, 2 most simulation work have concentrated on the positive discharge in a needle--plane geometry while attention on the negative polarity is not as extensive.…”

mentioning

confidence: 99%

“…Important Trichel pulse parameters include the individual pulse shape, their magnitude and frequency of occurrence. Regarding the modelling side of the phenomenon, most of the work have been undertaken in 1D-1.5D (continuity equations are solved in 1D along the symmetry axis while Poisson's equation is solved using the effectively 2D disc method) [9][10][11]15]. Reports on full 2D simulations are rather limited [27].…”

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confidence: 99%

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Numerical modelling of negative discharges in air with experimental validation

Tran

Golosnoy

Lewin

et al. 2010

J. Phys. D: Appl. Phys.

161

116

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Axisymmetric finite element models have been developed for the simulation of negative discharges in air without and with the presence of dielectrics. The models are based on the hydrodynamic drift-diffusion approximation. A set of continuity equations accounting for the movement, generation and loss of charge carriers (electrons, positive and negative ions) is coupled with Poisson's equation to take into account the effect of space and surface charges on the electric field. The model of a negative corona discharge (without dielectric barriers) in a needle-plane geometry is analysed first. The results obtained show good agreement with experimental observations for various Trichel pulse characteristics. With dielectric barriers introduced into the discharge system, the surface discharge exhibits some similarities and differences to the corona case. The model studies the dynamics of volume charge generation, electric field variations and charge accumulation over the dielectric surface. The predicted surface charge density is consistent with experimental results obtained from the Pockels experiment in terms of distribution form and magnitude.

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“…Soria et al [21] have applied the PIC method for the simulation of Trichel pulses, the results of which compare favorably to those of FCT method. Soria-Hoyo et al [22] have further modified the PIC method to simulate a train of Trichel pulses, by making an assumption that the time needed for the electric field to change due to charge density variations is much more than characteristic times of electrons and ions. Hence the electric field is assumed to be constant for a large number of time steps of electron/ion motion.…”

Section: Particle-in-cell Approachmentioning

confidence: 99%

Approaches for Numerical Simulation of Partial Discharges

Bhangaonkar

Kulkarni

2008

2008 IEEE International Power Modulators and High-Voltage Conference

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Abstract-Insulation degradation is the primary reason for aging and eventual failure of electrical equipment. Any measurement that forewarns an impending breakdown of the equipment can be a boon to asset managers. Partial discharge (PD) is one such phenomenon that can be monitored for assessing the quality of insulation. However, the phenomenon of PD is quite intricate and requires an understanding of various concurrent processes. In this paper, some of the methods used to simulate this complex event have been reviewed. At the fundamental level, PD is a localized breakdown that occurs without complete bridging of the insulation. These are feeble and extremely fast, nanosecond discharges. They can be thought of as motion of charges under the influence of an external electric field, which has exceeded the breakdown strength in a small region of the insulation. When such discharges occur in voids in solid insulation, they generate signals in the electrical, chemical and acoustic domains. Also, PD causes physical damage due to bombardment of these charged particles on the walls of the void. The charges are generated by ionization of the gas filled in the void. Once ionized, the motion of these particles is governed not only by the external field, but also by the space charge so created. There are various methods that can be used to simulate the motion of these charges. Of these, particle-in-cell (PIC) method can be applied in a Lagrangian frame of reference, where the particles retain their identity, and their trajectories are monitored by calculating the force on them. This force is determined by the field at their location. This method is fairly intuitive. The other class, Eulerian, treats the charges as a density distribution and then determines its motion. In this, the flux-corrected transport (FCT) scheme basically considers the motion as governed by the charge continuity equations coupled with the Poisson's equation. The continuity equations also account for the generation of the charges, due to ionization, and their possible subsequent recombination or attachment. However, these events, as recorded, are also statistical in nature, and the effect of previous discharges on the subsequent ones can hardly be ignored. The method of including these in the simulation has also been reviewed.

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Particle-in-cell simulation of Trichel pulses in pure oxygen

Cited by 40 publications

References 19 publications

Numerical Simulation of the Characteristics of Electrons in Bar-plate DC Negative Corona Discharge Based on a Plasma Chemical Model

Numerical Simulation of the Characteristics of Electrons in Bar-plate DC Negative Corona Discharge Based on a Plasma Chemical Model

Numerical modelling of negative discharges in air with experimental validation

Approaches for Numerical Simulation of Partial Discharges

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