A Simplified Model of Corona Discharge on Overhead Wire for FDTD Computations

Thang, Tran Huu; Baba, Yoshihiro; Nagaoka, Naoto; Ametani, Akihiro; Takami, Jun; Okabe, S.; Rakov, Vladimir A.

doi:10.1109/temc.2011.2172688

Cited by 46 publications

(5 citation statements)

References 10 publications

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“…geometric capacitance. The matrix C can be replaced with a non-linear time-dependent dynamic capacitance C dyn to take into account for corona effect [37,38], which is neglected in the present paper. In Equation 1, the term corresponding to the so-called ground admittance is neglected.…”

Section: Numerical Formulationmentioning

confidence: 99%

Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD

et al. 2020

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Surge arresters may represent an efficient choice for limiting lightning surge effects, significantly reducing the outage rate of power lines. The present work firstly presents an efficient numerical approach suitable for insulation coordination studies based on an implicit Crank–Nicolson finite difference time domain method; then, the IEEE recommended surge arrester model is reviewed and implemented by means of a local implicit scheme, based on a set of non-linear equations, that are recast in a suitable form for efficient solution. The model is proven to ensure robustness and second-order accuracy. The implementation of the arrester model in the implicit Crank–Nicolson scheme represents the added value brought by the present study. Indeed, its preserved stability for larger time steps allows reducing running time by more than 60 % compared to the well-known finite difference time domain method based on the explicit leap-frog scheme. The reduced computation time allows faster repeated solutions, which need to be looked for on assessing the lightning performance (randomly changing, parameters such as peak current, rise time, tail time, location of the vertical leader channel, phase conductor voltages, footing resistance, insulator strength, etc. would need to be changed thousands of times).

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Section: Numerical Formulationmentioning

confidence: 99%

Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD

et al. 2020

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“…We represent the radial progression of corona streamers from the energized wire by the radial expansion of a cylindrical conducting region, as proposed in [2].…”

Section: B Corona Dischargementioning

confidence: 99%

“…In this paper, we apply the simplified model of corona discharge [2], which has been proposed recently for finitedifference time-domain (FDTD) [3] computations to simulate lightning surges propagating along a 2.2 km long overhead horizontal wire with corona discharge. We compare the FDTD-computed waveforms with the corresponding measured waveforms [1].…”

Section: Introductionmentioning

confidence: 99%

“…The validity of simplified model [2] has been tested against experimental data of [4] and [5]. Specifically, it has been shown in [2] that the waveform of radial current, the relation between the total charge (charge residing on the wire and emanated corona charge) and applied voltage (q-V curve), and the increase of coupling between the energized wire and another one nearby due to corona discharge, computed using the FDTD method with the simplified corona model for a 22 m or 44 m long horizontal wire, agree reasonably well with the corresponding measured ones.…”

Section: Introductionmentioning

confidence: 99%

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Lightning surges on an overhead wire in the presence of corona: FDTD simulation of Wagner et al.'s experiment

Tran

Baba

Nagaoka

et al. 2012

2012 Asia-Pacific Symposium on Electromagnetic Compatibility

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In this paper, a simplified model of corona discharge for finite-difference time-domain (FDTD) computations has been applied to analyzing lightning surges propagating along a 25 or 21 mm radius, 2.2 km long single overhead horizontal wire, which simulates the experiment of Wagner et al. [1954]. The critical electric field on the surface of the 25 mm radius wire for corona initiation is set to E 0 =1.3, 2.1 or 2.5 MV/m, and E 0 =2.2 MV/m for 21 mm radius wire. The critical background electric field for streamer propagation is set to E cp =0.5 MV/m for positive voltage application and E cn =1.5 MV/m for negative voltage application. The FDTD-computed waveforms of surge voltage at three different distances from the energized end of the wire agree reasonably well with the corresponding measured waveforms.

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“…The implementation of corona discharge in the computation of lightning-induced voltages has been based on two different strategies: (i) The concept of dynamic capacitance has been proposed in Reference [12] that is, when the induced voltage overcomes a threshold, the corona discharge determines an increase of the per unit length capacitance involved in the Agrawal model [14]; consequently, the dynamic capacitance mimics the experimental q-v characteristic of the corona discharge [15]. (ii) In References [16,17] the 3D-FDTD code simulates the corona discharge giving different values to the conductivity of the cell where corona effect is located; the main difference with the previous approach is that here the q-v characteristic results as an output calculation from the numerical integrations, while in the previous one appears as an input of the problem.…”

Section: Introductionmentioning

confidence: 99%

Corona Effect Influence on the Lightning Performance of Overhead Distribution Lines

Mestriner

Brignone

2020

Applied Sciences

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Overhead distribution lines can be seriously damaged from lightning events because both direct and indirect events can cause flashovers along the line. The lightning performance of such power lines is usually computed neglecting the effect of corona discharge along the conductors: in particular, the corona discharge determined by the indirect lightning event is taken into account only by few researchers because it can have meaningful impacts only in few cases. However, when we deal with overhead distribution lines with high Critical Flashover value (CFO) and small diameters, the corona discharge caused by indirect events has to be taken into account. This paper shows the effects of corona discharge in the lightning performance computation of overhead distribution lines. The analysis will involve different configurations in terms of line diameter and air conditions, focusing on the negative effect of corona discharge in the number of dangerous events that determine line flashovers.

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A Simplified Model of Corona Discharge on Overhead Wire for FDTD Computations

Cited by 46 publications

References 10 publications

Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD

Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD

Lightning surges on an overhead wire in the presence of corona: FDTD simulation of Wagner et al.'s experiment

Corona Effect Influence on the Lightning Performance of Overhead Distribution Lines

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