Study on Movement and Distribution Characteristics of Metal Particle Dust in DC GIL

Ma, Kang; Liu, Huaqi; Wang, Qiang; Wang, Shenghui; Lv, Fangcheng

doi:10.1109/tdei.2022.3169725

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…The accumulation of significant quantities of fine particulate matter on the surface of high-voltage transmission lines can exacerbate corona discharge, thereby altering the electromagnetic environment surrounding the transmission line. [9,55] This study investigates the variations in electric field intensity on the segmented conductor surface caused by various fouling layers and analyzes the principles governing the adhesion of dust particles to the conductor. Additionally, it develops a comprehensive force model incorporating electrostatic force, van der Waals force, and gravity acting between dust particles 014101-9 and subconductors.…”

Section: Discussionmentioning

confidence: 99%

Electric field and force characteristic of dust aerosol particles on the surface of high-voltage transmission line

Liu 刘,

Li 李,

Wang 王

et al. 2024

Chinese Phys. B

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High-voltage transmission lines play a crucial role in facilitating the utilization of renewable energy in regions prone to desertification. The accumulation of atmospheric particles on the surface of these lines can significantly impact corona discharge and wind-induced conductor displacement. Accurately quantifying the force exerted by particles adhering to conductor surfaces is essential for evaluating fouling conditions and making informed decisions. Therefore, this study investigates the changes in electric field intensity along branched conductors caused by various fouling layers and their resulting influence on the adhesion of dust particles. The findings indicate that as individual particle size increases, the field strength at the top of the particle gradually decreases and eventually stabilizes at approximately 49.22 kV/cm, which corresponds to a field strength approximately 1.96 times higher than that of an unpolluted transmission line. Furthermore, when particle spacing exceeds 15 times the particle size, the field strength around the transmission line gradually decreases and approaches the level observed on non-adhering surface. The electric field remains relatively stable. In a triangular arrangement of three particles, the maximum field strength at the tip of the fouling layer is approximately 1.44 times higher than that of double particles and 1.5 times higher compared to single particles. These results suggest that particles adhering to the transmission line have a greater affinity for adsorbing charged particles. Additionally, relevant numerical calculations demonstrate that in dry environments, the primary adhesion forces between particles and transmission lines follow an order of electrostatic force and van der Waals force. Specifically, at the minimum field strength, these forces are approximately 74.73 times and 19.43 times stronger than the gravitational force acting on the particles.

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Section: Discussionmentioning

confidence: 99%

Electric field and force characteristic of dust aerosol particles on the surface of high-voltage transmission line

Liu 刘,

Li 李,

Wang 王

et al. 2024

Chinese Phys. B

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“…Therefore, MD model should be used to calculate the adhesion force. , 𝑥 ≥ 0 0 , 𝑥 < 0 (18) k is the shape parameter, 𝛾 is the scale parameter. In order to obtain the parameters of Weibull distribution, the least square estimation (LSE) method was used.…”

Section: Statistical Analysis Of Adhesionmentioning

confidence: 99%

“…(1) where 𝛾 1 represents the surface energy of material 1, and 𝛾 12 represents the interaction energy between the two materials [18].…”

Section: Introduction Of Adhesion Modelmentioning

confidence: 99%

Study on Static Adhesion Characteristics of Micron Metal Particles in GIL

Ma¹,

Zhan²,

Wu³

et al. 2023

IEEE Access

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Gas insulated transmission lines (GIL) have a wide application prospect in special occasions such as cross terrain power transmission. Metal particle pollution is an important reason for the low insulation performance of GIL. When micron metal particles (MMPs), which are the most common metal particles in engineering, adhere to insulators or high-voltage electrodes, the insulation performance will be reduced. Based on that, this paper mainly studied the static adhesion characteristics of MMPs. Firstly, the static adhesion models and their applicable conditions were introduced. Then, through the atomic force microscope (AFM) test, the adhesion force of MMP-electrode and MMP-insulator was obtained. The test results show that MD model should be used to calculate the adhesion force of MMP-electrode and MMP-insulator. In addition, the adhesion force presents the characteristics of random distribution due to the surface asperities of MMPs and samples. Therefore, according to the test results, this paper introduced the equivalent adhesion work, which is a random variable, and obtained the probability distribution model of equivalent adhesion work. Finally, the distribution of adhesion force was obtained. The above research results provide guidance for inhibiting the adhesion of metal particles in GIL.INDEX TERMS GIL, micron metal particles, adhesion model.

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“…When k r is the electrostatic correction coefficient, it is equal to 0.832 when the particles are in contact with electrodes; otherwise it is equal to 1 [24]. q is the charge of the particle, which is calculated with Equation (1).…”

Section: Type Equationmentioning

confidence: 99%

Effect of Particle Trap on Motion Characteristics of Metal Particles in AC GILs and Parameter Optimization

Wang

Liu

et al. 2022

Coatings

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Metal particle contamination is an important reason for insulation failure of gas-insulated transmission lines (GILs). Particle trap is the common method for particle suppression. At present, research on the motion characteristics of metal particles near a particle trap and the optimization of trap parameters under AC voltage is insufficient. Based on that, firstly, a dynamic model of metal particles under AC voltage was established, and the motion characteristics of particles in front of the trap were studied, combined with experiments. Then, the influence of trap parameters on the capture effect was analyzed, and the optimization of the trap was realized by simulation. The results showed that, under AC voltage, the randomness of metal particle movement was strong, and the activity was low. The particles mainly moved away from the trap. Among the particles moving towards the trap, some stayed in front of the trap, and some fell into the trap from above. The thickness and height of the trap were the key parameters affecting the capture effect, and with the increase in height and thickness, the capture rate showed a trend of increasing first and then decreasing. The above conclusions can provide a reference for the optimization of a metal particle trap under AC voltage in engineering.

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Study on Movement and Distribution Characteristics of Metal Particle Dust in DC GIL

Cited by 11 publications

References 17 publications

Electric field and force characteristic of dust aerosol particles on the surface of high-voltage transmission line

Electric field and force characteristic of dust aerosol particles on the surface of high-voltage transmission line

Study on Static Adhesion Characteristics of Micron Metal Particles in GIL

Effect of Particle Trap on Motion Characteristics of Metal Particles in AC GILs and Parameter Optimization

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