Calculation of ion flow environment of DC transmission lines in the presence of charged aerosol particulates based on upwind-FEM

Yi, Yong; Chen, Zhengying; Tang, Wenxi; Wang, Liming

doi:10.1016/j.epsr.2020.106289

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…A  can be calculated from [26]: (5) in which f represents the factor of the surface roughness, δ represents the factor of air density, R represents the ionized wire radius (cm), j p represents the mean current density on the plate understudy, S…”

Section: ) the Charge Density At The Point A ( )mentioning

confidence: 99%

“…In this regard, several attempts were made to develop numerical techniques. The main purpose of these techniques is to solve Poisson and current continuity equations while obtaining the electric field and the current density associated with corona on monopolar HVDC transmission systems [5]. Common numerical techniques for solving the corona problem are: 1) the finite element method (FEM) [6][7][8][9][10][11][12][13][14], 2) the charge simulation method (CSM) [15][16][17][18], and 3) the boundary element method (BEM) [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Fast Corona Discharge Assessment Using FDM integrated With Full Multigrid Method in HVDC Transmission Lines Considering Wind Impact

et al. 2020

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Section: ) the Charge Density At The Point A ( )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast Corona Discharge Assessment Using FDM integrated With Full Multigrid Method in HVDC Transmission Lines Considering Wind Impact

et al. 2020

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“…Corona discharges can generate audible noise [5]. These corona discharges also cause energy loss, radio-frequency emission, and photon emission [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…These methods not only aim for precision but also strive for reduced computation time and enhanced efficiency, reflecting the evolving technological field [13]. The finite-element method (FEM) was initially proposed in 1979 by G.Cela [6], [7]. After the FEM was proposed, it was applied to different transmission line configurations to calculate changes in ion current density and electric field distribution considering the influence of wind in various climatic environments.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Ion Flow in One-Bipole HVDC Transmission Line Using Revised Charge Injection Methods

Kim,

Lee

2024

IEEE Access

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In the evolving field of electric power transmission networks, high-voltage direct current (HVDC) transmission has garnered attention for its efficacy in long-distance power delivery. However, HVDC systems are susceptible to corona discharges, which generate ions that disrupt the electric field distribution and pose safety concerns. To address these challenges, this study introduces new numerical methods for predicting the electric field and ion current density around HVDC transmission lines using the finite-element method. The onset fields for the corona discharge were established at 14 and 13 kV/cm for positive and negative ions, respectively. Three novel methods-average (A), cosine (C), and averagecosine combination (AC)-were introduced for continuous charge distribution. Additionally, an enhancement factor β was incorporated to reflect the various climatic conditions, enhancing the model's adaptability. This approach streamlines the analysis by reducing the reliance on complex parameters such as conductor roughness coefficient and climate constants. The methods were validated across four different bundle configurations of transmission lines, with the AC method demonstrating superior accuracy in predicting the electric field and ion current density, affirming its robustness in diverse scenarios, including under wind conditions. This research marks a significant advancement in modeling electrical discharge phenomena in HVDC environments, providing a simplified yet precise tool for ensuring electrical safety.

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“…their fields are not entirely confined within conductors). Problems in which open boundaries are present are often found in both power systems [5] and conventional communication systems [6], [7], in which transmission line parameter computation is a typical post-processing analysis.…”

Section: Introductionmentioning

confidence: 99%

Modeling Transmission Lines With Open Boundaries via Infinite Mapping Layer

Garcia-Contreras,

Córcoles,

Ruiz-Cruz

et al. 2024

IEEE J. Microw.

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In this paper we introduce the use of several different Infinite Mapping Layers to model open boundaries in the 2-D Finite Element Method for the computation of transmission line parameters. The transformation maps a semi-infinite interval to a finite interval, thereby providing a simple and accurate description of open boundaries while keeping the size of the computational domain very compact. The method has been evaluated and tested on a variety of common transmission line geometries appearing in the literature and its accuracy is validated by comparing the results with canonical cases having closed expressions and with arbitrary geometries computed with commercial software tools. Various geometrical transformations have been developed and tested, and their performances evaluated in terms of accuracy and efficiency. Finally, the possibility of using a radial Infinite Mapping Layer has also been considered.

show abstract

Calculation of ion flow environment of DC transmission lines in the presence of charged aerosol particulates based on upwind-FEM

Cited by 5 publications

References 24 publications

Fast Corona Discharge Assessment Using FDM integrated With Full Multigrid Method in HVDC Transmission Lines Considering Wind Impact

Fast Corona Discharge Assessment Using FDM integrated With Full Multigrid Method in HVDC Transmission Lines Considering Wind Impact

Numerical Analysis of Ion Flow in One-Bipole HVDC Transmission Line Using Revised Charge Injection Methods

Modeling Transmission Lines With Open Boundaries via Infinite Mapping Layer

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