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学者姓名：舒胜文
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运行在沿海或山区的硅橡胶复合绝缘子常年处于高湿度、大温差的恶劣环境中,由凝露诱发的沿面放电问题给复合绝缘子的运行可靠性带来了极大挑战.为深入研究硅橡胶表面凝露产生与发展机理,该文首先在现有滴状冷凝模型的基础上,构建出考虑不凝气体作用的湿空气滴状冷凝全周期数值仿真模型,并采用相邻液滴逻辑搜索算法提高该模型的运行效率;然后通过硅橡胶湿空气冷凝试验验证模型的有效性;最后探讨环境温湿度、冷凝基底物化性质等因素对冷凝发展的影响规律.得到以下结论:冷凝前期液滴主要通过直接冷凝生长,后期则以聚结生长为主导,冷凝后期聚结生长对最大液滴半径的贡献占比已超过70％;冷凝生长速率与相对湿度、温差呈正相关关系,而与材料厚度、静态接触角呈现负相关关系.该研究有助于揭示湿空气滴状冷凝机理,可以为绝缘材料抗凝露性能提升和电气设备预防凝露提供相应的理论基础和技术支持.
Keyword ：
冷凝生长 冷凝生长 液滴尺寸分布 液滴尺寸分布 滴状冷凝 滴状冷凝 硅橡胶 硅橡胶 聚结生长 聚结生长 逻辑搜索法 逻辑搜索法
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| GB/T 7714 | 舒胜文 , 占兆璇 , 黄雯桦 et al. 硅橡胶表面湿空气滴状冷凝数值模拟与试验验证 [J]. | 高电压技术 , 2025 , 51 (4) : 1980-1992 . |
| MLA | 舒胜文 et al. "硅橡胶表面湿空气滴状冷凝数值模拟与试验验证" . | 高电压技术 51 . 4 (2025) : 1980-1992 . |
| APA | 舒胜文 , 占兆璇 , 黄雯桦 , 张丽娜 , 卞志文 , 林一泓 . 硅橡胶表面湿空气滴状冷凝数值模拟与试验验证 . | 高电压技术 , 2025 , 51 (4) , 1980-1992 . |
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In hygrothermal environment, water is easy to invade the epoxy resin aging, resulting in a decline in electrical insulation performance. In order to clarify the microcosmic mechanism of epoxy resin wet thermal aging, the effects of temperature and water content on the crosslinking system of epoxy resin were studied by molecular dynamics simulation technology. The results show that after water invasion, part of the free volume is occupied first. With the increase of moisture absorption, swelling and plasticization of the material occur, which causes the glass transition temperature to first increase and then decrease. On the one hand, high temperature intensifies the molecular movement, increases the energy of the system, and makes the system unstable. On the other hand, high water content enhances the interaction between epoxy resin and water molecules, and the combined action of the two aggravates the damp-heat aging of epoxy resin. © Beijing Paike Culture Commu. Co., Ltd. 2025.
Keyword ：
Crosslinking Crosslinking Thermal aging Thermal aging Water content Water content
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| GB/T 7714 | Huang, Wenhua , Shu, Shengwen , Zhan, Zhaoxuan et al. Molecular Dynamics Simulation of Epoxy Resin Aging Considering Ambient Temperature and Humidity [C] . 2025 : 436-443 . |
| MLA | Huang, Wenhua et al. "Molecular Dynamics Simulation of Epoxy Resin Aging Considering Ambient Temperature and Humidity" . (2025) : 436-443 . |
| APA | Huang, Wenhua , Shu, Shengwen , Zhan, Zhaoxuan , Lin, Yihong , Bian, Zhiwen . Molecular Dynamics Simulation of Epoxy Resin Aging Considering Ambient Temperature and Humidity . (2025) : 436-443 . |
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In recent years, the decay-like fracture of composite insulator core rods is encountered frequently, which has seriously affected the reliability of transmission lines. However, there is a lack of assessment method to quantify the degrees of composite insulator core rod degradation. In this article, a method for assessing the degree of composite insulator's degradation based on ultrasonic guided waves was proposed. The study focused on core rods with different decay-like fracture degrees in composite insulators obtained from the field. Simulations and tests of ultrasonic guided waves were conducted to assess the decay-like degrees, and the physicochemical properties of composite insulators at different stages of decay-like development were tested to verify the assessment results from a microscopic perspective. The results show that the 35 kHz T(0, 1) and 55 kHz L(0, 1) modes are suitable for detection, and the peak-to-peak values of the ultrasonic guided wave packet received at a certain distance decrease with the increase of the decay-like degree. With the progression of decay-like aging, the dielectric constant, the dielectric loss tangent, and the carbon content in the core rod increase significantly. On the other hand, the oxygen and silicon contents show the opposite trend. Infrared spectral results can effectively distinguish new factory samples and samples with decay-like fracture deterioration. However, it shows limited differentiation capability for composite insulators at various stages of decay-like aging. The research provided a reference for assessing the decay-like degree of composite insulator core rods.
Keyword ：
Acoustics Acoustics Aging Aging Composite insulator Composite insulator decay-like fracture decay-like fracture Degradation Degradation Dispersion Dispersion Epoxy resins Epoxy resins Glass Glass Inspection Inspection Insulators Insulators physicochemical characteristics physicochemical characteristics Power transmission lines Power transmission lines Solids Solids ultrasonic guided wave ultrasonic guided wave
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| GB/T 7714 | Fang, Shuqi , Shu, Shengwen , Zhang, Bizhen et al. An Ultrasonic Guided Waves-Based Assessing Method for Decay-Like Degrees of Composite Insulator Core Rods [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
| MLA | Fang, Shuqi et al. "An Ultrasonic Guided Waves-Based Assessing Method for Decay-Like Degrees of Composite Insulator Core Rods" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 74 (2025) . |
| APA | Fang, Shuqi , Shu, Shengwen , Zhang, Bizhen , Xu, Jun , Fang, Chaoying , Wang, Xiaojie . An Ultrasonic Guided Waves-Based Assessing Method for Decay-Like Degrees of Composite Insulator Core Rods . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
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Epoxy resins are susceptible to condensation in high humidity environments, leading to flashover discharges that compromise their insulation properties. Hence, investigating the electrohydrodynamic behaviors of droplets on epoxy resin surfaces is crucial for understanding and mitigating such phenomena. By analyzing the droplet dynamics through experiments, this study thoroughly explores the spreading and migration characteristics of droplets under the influence of varying AC voltages. Simulation and numerical models are developed to depict droplet motion and force dynamics, integrating principles of hydrodynamics and electrodynamics. The findings reveal that droplets spread in the direction of the electric field, with the extent of spreading increasing with the increase in voltage. This spreading is influenced by various factors, including the droplet's position, volume, and surface tension. Primarily, the electric field at the droplet's base generates a tangential force that determines its spreading. Furthermore, the droplet tends to move toward the nearer electrode, especially when a tip structure emerges on its surface, facilitating more rapid deformation in that direction. (c) 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND) license (https://creativecommons.org/licenses/by-nc-nd/4.0/).https://doi.org/10.1063/5.0233998
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| GB/T 7714 | Shu, Shengwen , Huang, Wenhua , Zhan, Zhaoxuan et al. Electrohydrodynamic behavior of droplets on the surface of epoxy resin under electric field [J]. | AIP ADVANCES , 2025 , 15 (1) . |
| MLA | Shu, Shengwen et al. "Electrohydrodynamic behavior of droplets on the surface of epoxy resin under electric field" . | AIP ADVANCES 15 . 1 (2025) . |
| APA | Shu, Shengwen , Huang, Wenhua , Zhan, Zhaoxuan , Zhang, Lina , Lin, Yihong , Bian, Zhiwen . Electrohydrodynamic behavior of droplets on the surface of epoxy resin under electric field . | AIP ADVANCES , 2025 , 15 (1) . |
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The detection of wildfire in transmission line corridors under multiple background interference suffers from high false and missed detection rates, and the difficulty of detecting wildfire and smoke in small targets, etc. The YOLOv5s model has high real-time performance, but the accuracy of detecting wildfire in the actual power grid requires to be improved. Consequently, a flame and smoke detection method based on YOLOv5s-EBWS is proposed in this paper, after analyzing the multiple disturbances of wildfire pictures in transmission line corridors. Firstly, a dataset is constructed by collecting many live images of wildfire incidents along actual transmission lines. Secondly, the efficient multi-scale attention (EMA) mechanism and weighted bi-directional feature pyramid network (BiFPN) are introduced into the YOLOv5s model to efficiently extract and fully integrate multi-scale spatial information and important features of flame and smoke. Then, wise intersection over union (WIoU) loss function and soft non-maximum suppression (Soft NMS) method are introduced to avoid the missed detection of overlapping fire and smoke, ultimately to enhance the generalization of the model. Finally, example verification is carried out. The results show that the dataset in this paper improves the evaluation indexes of the model by 12%~15% compared with the public fire dataset. Compared with YOLOv5, the size of YOLOv5s-EBWS model is reduced by 0.4 MB, and the values of emAP@0.5, emAP@0.5:0.95 and F1 for fire and smoke are increased by 2.3%, 3.8%, 4.9%, and 5.5%, respectively. The proposed method provides a new way to detect wildfire occurred in transmission line corridors. © 2025 Science Press. All rights reserved.
Keyword ：
Optical character recognition Optical character recognition
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| GB/T 7714 | Shu, Shengwen , Tang, Shijie , Xiao, Nan et al. Flame and Smoke Detection Method Based on YOLOv5s-EBWS in Transmission Line Corridors Under Multiple Background Interferences [J]. | High Voltage Engineering , 2025 , 51 (5) : 2374-2383 . |
| MLA | Shu, Shengwen et al. "Flame and Smoke Detection Method Based on YOLOv5s-EBWS in Transmission Line Corridors Under Multiple Background Interferences" . | High Voltage Engineering 51 . 5 (2025) : 2374-2383 . |
| APA | Shu, Shengwen , Tang, Shijie , Xiao, Nan , Xu, Jun , Fang, Chaoying , Xie, Wenbing . Flame and Smoke Detection Method Based on YOLOv5s-EBWS in Transmission Line Corridors Under Multiple Background Interferences . | High Voltage Engineering , 2025 , 51 (5) , 2374-2383 . |
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Silicone rubber composite insulators running in coastal or mountainous areas are always in the harsh environment of high humidity and large temperature difference, and the problem of creeping discharge induced by condensation has brought great challenges to the operational reliability of composite insulators. In order to study the mechanism of condensation generation and development on the surface of silicone rubber, we firstly constructed a full-cycle numerical simulation model of wet air droplet condensation considering the role of non-condensable gases on the basis of the existing droplet condensation model, and adopted the neighboring droplet logic searching algorithm to improve the operation efficiency of the model. The validity of the model was then verified by a silicone rubber wet air condensation test. Finally, we discussed the influence law of environmental temperature and humidity, physical and chemical properties of condensation substrate on the development of condensation. Finally, we explored the law of influence of factors such as ambient temperature and humidity, and the physical and chemical properties of the condensed substrate on the development of condensation. The following conclusions can be drawn: The pre-condensation droplets grow mainly by direct condensation, while the later period is dominated by agglomeration growth, and the contribution of coalescence growth to the maximum droplet radius at the later stage of condensation is more than 70%; The condensation growth rate is positively correlated with relative humidity and temperature difference, and negatively correlated with material thickness and static contact angle. This study helps to reveal the mechanism of wet air droplet condensation, which can provide the corresponding theoretical basis and technical support for the improvement of anti-condensation performance of insulating materials and the prevention of condensation in electrical equipment. © 2025 Science Press. All rights reserved.
Keyword ：
Bioreactors Bioreactors Electric insulating materials Electric insulating materials Electric insulators Electric insulators Safety devices Safety devices
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| GB/T 7714 | Shu, Shengwen , Zhan, Zhaoxuan , Huang, Wenhua et al. Numerical Simulation and Experimental Verification of Wet Air Droplet Condensation on Silicone Rubber [J]. | High Voltage Engineering , 2025 , 51 (4) : 1980-1992 . |
| MLA | Shu, Shengwen et al. "Numerical Simulation and Experimental Verification of Wet Air Droplet Condensation on Silicone Rubber" . | High Voltage Engineering 51 . 4 (2025) : 1980-1992 . |
| APA | Shu, Shengwen , Zhan, Zhaoxuan , Huang, Wenhua , Zhang, Lina , Bian, Zhiwen , Lin, Yihong . Numerical Simulation and Experimental Verification of Wet Air Droplet Condensation on Silicone Rubber . | High Voltage Engineering , 2025 , 51 (4) , 1980-1992 . |
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In high humidity and salt spray environments, the surfaces of insulating materials are prone to condensation, which causes surface discharge accidents and reduces insulation performance. First, focusing on the electrothermal effect of the localized arc on the surfaces of insulating materials in condensation conditions, the condensation growth characteristics under different environmental factors are studied. Second, the electrothermal characteristics of the localized arc are evaluated based on the characteristics of condensation distribution. Finally, multi-physics coupling simulations are carried out for comparison. The results show that the numerical simulation and experimental results follow the same trend and are highly consistent. The maximum relative error between the two temperatures is 9.34% when the sewage concentration is 5 mg/ml. The discharge under condensation is due to the combination of multiple physical parameters such as electricity, heat, and light. The arcing voltage is negatively correlated with air velocity, temperature difference, and relative humidity but positively correlated with ambient temperature. In addition, non-environmental factors such as electrode shape and wetting degree have a significant influence on the arc starting voltage. The electrothermal effect of the localized arc further leads to a significant decrease in the hydrophobicity of the insulation materials. (c) 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/5.0255104
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| GB/T 7714 | Huang, Wenhua , Shu, Shengwen , Xu, Junwei et al. Electrical-thermal effect of localized arcs on the surface of contaminated insulating materials under condensation [J]. | AIP ADVANCES , 2025 , 15 (7) . |
| MLA | Huang, Wenhua et al. "Electrical-thermal effect of localized arcs on the surface of contaminated insulating materials under condensation" . | AIP ADVANCES 15 . 7 (2025) . |
| APA | Huang, Wenhua , Shu, Shengwen , Xu, Junwei , Zhang, Lina , Lin, Yihong , Bian, Zhiwen . Electrical-thermal effect of localized arcs on the surface of contaminated insulating materials under condensation . | AIP ADVANCES , 2025 , 15 (7) . |
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Harvesting energy from insulated shield wires using a tuning reactor is an effective way to supply power to largescale online monitoring devices installed on high-voltage overhead transmission lines. However, significant fluctuations in equivalent parameters induced by adverse meteorological conditions cause overvoltage, posing challenges to conventional tuning reactors that rely only on inherent material characteristics for self-regulation. To address this problem, this study presents a magnetically-controlled energy harvesting reactor with active tuning for overhead insulated shield wires. In addition to the high-and low-voltage windings, a control winding is added to the low-voltage core side to adjust saturation by injecting an external DC component, allowing active inductance adjustment and limiting overvoltage caused by large fluctuations in equivalent parameters. Field-circuit coupling simulations show that the maximum power under a rated insulation level of 28.5 kV is 985.8 W. Under extreme ice conditions, the maximum power increases to 1281.42 W. However, the voltage across the high-voltage side of the energy harvesting reactor rises to 33.43 kV, exceeding the rated insulation level. After applying the control winding, the voltage on the high-voltage side decreases to 28.42 kV, the maximum power reduces to 929.30 W, and the maximum magnetic flux intensity increases from 1.04 T to 1.44 T. Experimental results from a reduced-scale model verify the effectiveness of the proposed reactor in handling adverse meteorological conditions. The proposed method enhances the robustness and engineering applicability of energy harvesting from overhead insulated shield wires.
Keyword ：
Active tuning Active tuning Adverse meteorological conditions Adverse meteorological conditions Energy harvesting Energy harvesting Magnetically controlled energy Magnetically controlled energy Overhead insulated shield wire Overhead insulated shield wire
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| GB/T 7714 | Chen, Xiaofeng , Shu, Shengwen , Cao, Shiyun et al. An efficient method for energy harvesting from overhead insulated shield wires based on a magnetically controlled reactor with active tuning [J]. | ENERGY , 2025 , 326 . |
| MLA | Chen, Xiaofeng et al. "An efficient method for energy harvesting from overhead insulated shield wires based on a magnetically controlled reactor with active tuning" . | ENERGY 326 (2025) . |
| APA | Chen, Xiaofeng , Shu, Shengwen , Cao, Shiyun , Qiu, Han , Xu, Jun , Fang, Chaoying . An efficient method for energy harvesting from overhead insulated shield wires based on a magnetically controlled reactor with active tuning . | ENERGY , 2025 , 326 . |
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Donor doping can increase the dielectric constant of a material by several orders of magnitude due to induced space charge causing interfacial polarization. Giant dielectric properties and interface polarization are also both expected to greatly enhance the flexoelectric behavior of a material. In this work, a typical flexoelectric ceramic material, BaTiO3, was selected and donor doped using elemental Nb. Compared with the nominal BaTiO3 ceramic, the dielectric constant and flexoelectric coefficient of the Nb-doped BaTiO3 ceramics were significantly improved. The transverse flexoelectric coefficient of 0.3 mol. % Nb-BaTiO3 was found to increase to nearly 40 times the nominal value, reaching 387 mu C/m. The results indicate that the giant dielectric response, and therefore the giant flexoelectric response, is the result of the combined effects of internal barrier-layer capacitance and surface barrier-layer capacitance. This study not only deepens the understanding of the semiconductor macro-dielectric effect and the flexoelectric mechanism caused by doping, but it also provides a feasible strategy for the design of giant dielectric/flexoelectric response materials and related devices with high dielectric constants and flexoelectric coefficients.
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| GB/T 7714 | Li, Hao , Wu, Hao , Wang, Zhiguo et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics [J]. | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
| MLA | Li, Hao et al. "Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics" . | APPLIED PHYSICS LETTERS 124 . 6 (2024) . |
| APA | Li, Hao , Wu, Hao , Wang, Zhiguo , Xie, Zhengqiu , Shu, Shengwen , Liu, Zhiyong et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics . | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
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Wildfires have become an important factor threatening the safe and stable operation of transmission lines, and large-scale wildfires can significantly reduce the air gap insulation level of transmission lines and cause line tripping. Therefore, based on the principle of cellular automata and Wang Zhengfei's model of wildfire spread, this paper analyzes in detail the effects of factors such as slope, wind speed, wind direction, and fuel type on the speed of wildfire spread and the area of the fire site, and predicts the time when the wildfire arrives below the transmission line. The results indicate that the established model can preliminarily reflect the spread law of wildfires, and has a certain guiding role for the safe and stable operation of the power grid. © Beijing Paike Culture Commu. Co., Ltd 2024.
Keyword ：
Cellular automata Cellular automata Electric lines Electric lines Electric power transmission Electric power transmission Fires Fires Transmissions Transmissions Wind Wind
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| GB/T 7714 | Xu, Jun , Fang, Chaoying , Cao, Shiyun et al. Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines [C] . 2024 : 191-200 . |
| MLA | Xu, Jun et al. "Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines" . (2024) : 191-200 . |
| APA | Xu, Jun , Fang, Chaoying , Cao, Shiyun , Shu, Shengwen . Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines . (2024) : 191-200 . |
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