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High voltage direct current (HVDC) transmission technology has incomparable advantages in long‐distance and large‐capacity transmission. With the development of HVDC transmission technology, transmission lines inevitably pass through some densely populated and economically developed areas. Due to environmental considerations, the space electric fie...
Citations
... field and ion current density near the ground. 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]. ...
... Most methods introduced so far probably show reasonable agreement with experimental results [13], [14]. In other words, even if the method of calculating the surface charge around the conductor changes, the electric field distribution on the ground cannot be practically altered much. ...
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 average–cosine 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.
