Numerical and Experimental Investigation of Grounding Electrode Impulse-Current Dispersal Regularity Considering the Transient Ionization Phenomenon

Li, Jingyuan; Yuan, Tao; Yang, Qing; Sima, Wenxia; Sun, Caixin; Zahn, M.

doi:10.1109/tpwrd.2011.2158860

Cited by 47 publications

(24 citation statements)

References 16 publications

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“…The relations given in (2) to (10) for computing the ionized soil volume and equivalent radius are represented as functions of distance x. Time various representation of ionized soil volume and equivalent radius.…”

Section: Equivalent Radiusmentioning

confidence: 99%

The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions

Mokhtari

Abdul‐Malek

Salam

2015

Int. Trans. Electr. Energ. Syst.

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Summary The soil ionization phenomenon effectively reduces the grounding electrode resistance. The existing methods to determine the soil ionization effect on the transient resistance of a grounding electrode are valid only for homogeneous soils. However, most soil structures are non‐homogeneous. Realizing the importance of the issue, this study proposes a hybrid method to incorporate the soil ionization effect on the transient resistance of a grounding electrode located in non‐homogeneous soil condition. The electromagnetic field approach is utilized to compute the ionized soil volume around the electrode to determine the equivalent radius of the electrode. A circuit‐based method of computing the grounding resistance of the electrode in non‐homogeneous soil conditions is proposed based on the per‐unit‐length distributed parameter method. The proposed method is validated by using an electromagnetic field‐based numerical solution for the non‐homogeneity effect of the soil on grounding electrode resistance. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Equivalent Radiusmentioning

confidence: 99%

The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions

Mokhtari

Abdul‐Malek

Salam

2015

Int. Trans. Electr. Energ. Syst.

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“…The electric field distribution in the discharge space is neither a steady current field, nor a static field in the complete sense. Therefore, accurate results cannot be obtained either by the steady-current-field-solving method nor by the static-field-solving method [25,26]. In the discharge space, the vortex current could be considered negligible compared with the conductive current and displacement current because the electromagnetic wavelength corresponding to the supply frequency utilized in the experiment (27 kHz) is substantially longer than the size of the reactor.…”

Section: Theoretical Model Setupmentioning

confidence: 99%

“…In our previous study, the MC configuration, i.e., needles arrayed on the inner axial electrode, was proposed [13,14]. Our previous study showed that the introduction of needles resulted in a further distorted electric field of the MC reactor, that was initially uneven between the coaxial electrodes, both at 50 Hz and at higher frequencies (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29) [13,14]. The MC configuration reduced the initial discharge voltage and operation voltage and improved transported charges compared with the coaxial configuration.…”

Section: Introductionmentioning

confidence: 99%

“…However, the electric field distribution in the discharge space is neither a steady current field, nor a static field in the complete sense. Hence, accurate results cannot be obtained either by the steady-current-field-solving method nor by the static-field-solving method [25,26]. In the present work, the three-dimensional (3-D) finite element method (FEM) and quasi-static field simulation are used to optimize the discharge formation of MC configurations in atmospheric air, in which AR and AR volume ratio defined in [9] are introduced in the present work.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric Barrier Discharge Characteristics of Multineedle-to-Cylinder Configuration

et al. 2011

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Abstract:A dielectric barrier discharge (DBD) produces a homogenous discharge with low energy consumption, offering broad developmental prospects, and this discharge process is also the mechanism through which charges are transported. Higher reaction efficiency is achieved when more charges are transported. Focusing on the electrode configuration of the multineedle-to-cylinder (MC) system, i.e., the structure of needles arrayed on the inner coaxial rod, the effect of needle arrangement, including needle length (NL), inter axial needle distance (ID), and inter axial needle rotation angle (INRA), on the transported charge per cycle and discharge power in DBDs is investigated. The finite-element method (FEM) and quasi-static field simulation are adopted to study the active region (AR) where the electric field strength exceeds the breakdown electric field strength between MC electrodes because this region plays a dominant role in DBD. The improvement of its volume ratio in the reactor allows an increase in discharge power. The simulation results are in accordance with the experimental results, which illustrate that quasi-static field simulation is effective and reliable. Simulation results show that mutual effects of nearby needles and between needles and the inner rod exist. As a result, shorter ID (1.5 mm), needles with similar lengths (3.5 mm) are arranged, and an INRA of 0° is proven to be the optimal structure because it produces the highest AR volume ratio. The result is experimentally validated by transported charges per cycle and discharge power obtained through Lissajous figures. OPEN ACCESSEnergies 2011, 4 2134

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“…For example, circuit theory, 1-5 transmission line theory 6,7 electromagnetic field theory, [8][9][10][11][12][13] and some hybrid methods. [14][15][16][17][18][19][20][21] However, numerical methods based on time-domain difference theories have also been developed, for example, the finite-difference time-domain (FDTD) method, 20,22 the electric circuit method, 23,24 transmission-line theory, 25,26 and the generalized modified mesh current method. 27,28 However, all of these numerical methods only consider a half-uniform earth model in the time domain.…”

Section: Introductionmentioning

confidence: 99%

Transient lightning response of grounding grids in a horizontal, multilayered soil model that considers soil ionization effects with time‐domain quasi‐static complex images

Rao

2018

Int J Numerical Modelling

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A novel mathematical model is proposed that can accurately calculate the lightning current distribution and lightning impulse response of a grounding horizontal grid with a vertical rod embedded in a horizontal, multilayered earth model, under the consideration of soil-ionization effects. To improve the computational efficiency, a quasi-static complex image method and the closed form of the time-domain Green's function were introduced into the model. KEYWORDS closed form of Green's function in time domain, grounding system, horizontal multilayered earth model, lightning, nodal analysis

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Numerical and Experimental Investigation of Grounding Electrode Impulse-Current Dispersal Regularity Considering the Transient Ionization Phenomenon

Cited by 47 publications

References 16 publications

The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions

The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions

Dielectric Barrier Discharge Characteristics of Multineedle-to-Cylinder Configuration

Transient lightning response of grounding grids in a horizontal, multilayered soil model that considers soil ionization effects with time‐domain quasi‐static complex images

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