IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第4页

A Critical Assessment of Electrical Conductivity and Multifunctionality of MWCNT/Epoxy Nanocomposites MWCNT/环氧纳米复合材料的电导率和多功能性的关键评估

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-18 DOI: 10.1109/TDEI.2025.3562536

Himanshu Gupta;Mukul Srivastava;Prabhat K. Agnihotri;Sumit Basu;Nandini Gupta

{"title":"A Critical Assessment of Electrical Conductivity and Multifunctionality of MWCNT/Epoxy Nanocomposites","authors":"Himanshu Gupta;Mukul Srivastava;Prabhat K. Agnihotri;Sumit Basu;Nandini Gupta","doi":"10.1109/TDEI.2025.3562536","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3562536","url":null,"abstract":"Using available data from the literature and our own results, we critically examine the multifunctionality of epoxy-multiwalled carbon nanotube (MWCNT) composites. A major advantage of adding MWCNTs is that the key properties of the pristine epoxy are largely retained or even bettered. How the synthesis process affects the dispersion of the nanofillers and their properties is studied. Ideas from percolation theory are used to study and understand the nature of the variation of dc electrical conductivity with filler content and that of ac conductivity with both filler content and frequency. The electromagnetic shielding effectiveness over a broad microwave frequency range is investigated. Tensile strength, fracture properties, and thermal conductivity of the nanocomposites are also investigated. Thus, the multifunctionality of MWCNT-epoxy composites is critically assessed. Overall, we demonstrate that a deep understanding of the conduction mechanisms has been achieved. Also, the limitations of these materials have been identified and potential applications are mapped out. Their use as tough and durable electrically conductive adhesives (ECAs) is indicated. It is also shown that the major impediments to more versatile applications of these materials are their poor thermal conductivity and loss of flowability with increasing MWCNT content.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1324-1332"},"PeriodicalIF":2.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Relationship Between the Sound Velocity and Deterioration Degree of Long-Term Operation XLPE XLPE长期运行声速与恶化程度的关系

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-18 DOI: 10.1109/TDEI.2025.3562533

Qian Wang;Rui Liu;Zeli Ju;Sichen Qin;Zhe Hou;Huan Lian;Rong Shi

{"title":"The Relationship Between the Sound Velocity and Deterioration Degree of Long-Term Operation XLPE","authors":"Qian Wang;Rui Liu;Zeli Ju;Sichen Qin;Zhe Hou;Huan Lian;Rong Shi","doi":"10.1109/TDEI.2025.3562533","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3562533","url":null,"abstract":"With the continuous progress of urbanization, cross-linked polyethylene (XLPE) cable has been widely used in the construction of urban power grids. XLPE cable will deteriorate under the action of electricity, heat, and other factors for a long time, endangering the operation safety of the power grid. The trap characteristic is a significant means to reveal the mechanism of cable deterioration. To explore the relationship between cable deterioration and trap characteristics, this article uses the pulsed electroacoustic (PEA) method to analyze the trap characteristics of XLPE cables with the service life of 0, 15, and 30 years, respectively, and the sound velocity of XLPE was carried out under different temperature profiles. With the increase in operating life, the internal defects of the XLPE gradually expand, and the accumulation of charge increases significantly. The sound velocity increases gradually at the same temperature and the breakdown field strength gradually decreases. Taking 293 K as an example, compared with 0 A, the breakdown field strength of 15 and 30 A decreased by about 16.0% and 16.4%, respectively, and the corresponding medium sound velocity increased by about 5.89% and 13.71%, respectively. The results take the increase degree of sound velocity of polymer insulating medium as the characteristic parameter to characterize the deterioration level of cable, which provides a theoretical basis for evaluating the deterioration level of cable.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1263-1270"},"PeriodicalIF":2.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling Plasma Characteristics and Breakdown Mechanism in Nanosecond-Pulsed Dielectric Barrier Discharge 纳秒脉冲介质阻挡放电的等离子体特性和击穿机制

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-15 DOI: 10.1109/TDEI.2025.3561085

Mengbo Li;She Chen;Yingzhe Cui;Qiao Wang;Linlin Liu;Xuan Zhou;Chijie Zhuang;Feng Wang

{"title":"Unraveling Plasma Characteristics and Breakdown Mechanism in Nanosecond-Pulsed Dielectric Barrier Discharge","authors":"Mengbo Li;She Chen;Yingzhe Cui;Qiao Wang;Linlin Liu;Xuan Zhou;Chijie Zhuang;Feng Wang","doi":"10.1109/TDEI.2025.3561085","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3561085","url":null,"abstract":"Nanosecond-pulsed dielectric barrier discharges (DBDs) have gained significant attention for its promising applications in various fields. More systematic investigations are necessary to better understand the fundamental processes of pulsed DBD. In this study, the characteristics and the initial breakdown mechanism of atmospheric nanosecond-pulsed DBD are investigated. The electric field-induced second harmonic (E-FISH) technique is employed to investigate the electric field within the discharge gap. Additionally, the effects of pulse amplitude and pulse repetition rate on discharge characteristics, particularly the electric field, are analyzed. The results indicate that an increase in pulse amplitude leads to higher breakdown currents and a more pronounced reverse electric field peak, whereas the pulse repetition rate has a minimal effect on discharge behavior. A 2-D fluid model is developed to simulate discharge dynamics and analyze the spatiotemporal evolution of particles. Based on both experimental and simulation results, the discharge process is characterized by three distinct stages: Stage I (discharge breakdown), Stage II (surface charge accumulation), and Stage III (surface charge neutralization). The breakdown mechanism is further elucidated by examining the role of residual charges near the dielectric layer, which enhances the local electric field and facilitate the generation of secondary electrons, leading to ionization and subsequent discharge establishment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2005-2013"},"PeriodicalIF":3.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Insulation Degradation Analysis on Electrical Machines Under Fast and Repetitive Voltage Pulses: A Review 快速重复电压脉冲作用下电机绝缘退化分析综述

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-15 DOI: 10.1109/TDEI.2025.3561093

R. Madavan;Abderrahmane Beroual;C. Thirumurugan

引用次数: 0

Degradation Characteristics of Dielectric Film Under Nanosecond Pulse Current and the Mechanism Based on PIC-MCC Simulation 基于PIC-MCC仿真的纳秒脉冲电流下介质膜降解特性及机理研究

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-11 DOI: 10.1109/TDEI.2025.3559908

Jinru Sun;Zijia Jiao;Haoliang Liu;Zhiqiang Chen;Yupeng Chai;Xueling Yao

{"title":"Degradation Characteristics of Dielectric Film Under Nanosecond Pulse Current and the Mechanism Based on PIC-MCC Simulation","authors":"Jinru Sun;Zijia Jiao;Haoliang Liu;Zhiqiang Chen;Yupeng Chai;Xueling Yao","doi":"10.1109/TDEI.2025.3559908","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3559908","url":null,"abstract":"The peaking capacitor is a crucial component in the high-altitude electromagnetic pulse (HEMP) device. One of the significant challenges faced by the peaking capacitor is the reduction in the flashover tolerance strength of the dielectric film. This article simulates the electromagnetic environment of dielectric film and carries out flashover experiments to study the degradation characteristics of polypropylene (PP) and polyethylene terephthalate (PET) films under nanosecond pulse current injection. The effects of damage type and degree on the flashing process are analyzed by particle-in-cell Monte-Carlo-collision (PIC-MCC) method. The results show that the deformation characteristics of the film surface under nanosecond pulse current have a key influence on the flashing tolerance strength. Specifically, the raised and folded deformation of the PP film can increase the electron emission coefficient of the surface and expand the ionization range of the gas, which significantly enhances the number of electrons and reduces the flashover voltage. The microporous deformation of PET film increases the area of electron collision, but the pitted deformation restricts the diffusion of low-energy electrons. As a result, the number of electrons remains balanced, leading to a more stable flashover strength. The simulation can predict the flashover voltage of dielectric films and highly consistent with the experiments, revealing the deterioration mechanism of the film’s flashover tolerance under the action of multiple flashovers. This provides analytical methods and a theoretical basis for improving the flashover tolerance strength of dielectric films.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1297-1304"},"PeriodicalIF":2.9,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Space Charge and Associated Electric Field Distribution in Presence of Water Trees in XLPE Insulation Under DC and AC Voltages 交直流电压下交联聚乙烯绝缘中存在水树时的空间电荷和伴生电场分布

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-07 DOI: 10.1109/TDEI.2025.3558494

Madjid Meziani;Abdelouahab Mekhaldi;Madjid Teguar

{"title":"Space Charge and Associated Electric Field Distribution in Presence of Water Trees in XLPE Insulation Under DC and AC Voltages","authors":"Madjid Meziani;Abdelouahab Mekhaldi;Madjid Teguar","doi":"10.1109/TDEI.2025.3558494","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3558494","url":null,"abstract":"The aim of this work is to investigate the effect of frequency and the physical properties of water trees, namely, conductivity and permittivity, on the evolution of the space charge and the associated electric field distribution in the cross-linked polyethylene (XLPE) insulation under direct current (dc)and ac voltages. For this purpose, we have considered a 12-kV electric cable model with XLPE internal insulation, coated with two semiconductor layers, one inside and one outside. A pair of vented water trees, denoted as w1 and w2, is developed from these semiconductor layers. It is assumed that the permittivity and the conductivity are homogeneously distributed within the two water trees. Our study was carried out under COMSOL MULTIPHYSICS environment, using the finite element method. As main results under ac voltage, the increase of applied frequency blocks the ability of the space charge to move through the insulation, affecting both space charge density dynamic motion and electric field distribution. On the contrary, a water trees conductivity increase releases the space charge accumulated at the interfaces of the two semiconductor layers. In fact, this process amplifies the activity and dynamic behavior of such charge, facilitating its penetration into the insulation through the semiconductor layers before completely moving to two water tree tips. The same phenomenon, resulting in the complete migration of the accumulated charge from the semiconductor layers to the tips of the water trees, has also been observed in dc. The amount of this accumulated space charge leads to the electric field reinforcement especially at the XLPE insulation/water trees tips critical interfaces. This situation could generate an ac or dc electrical tree. This latter can only be initiated from the water tree tip.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1343-1352"},"PeriodicalIF":2.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Partial Discharge Characteristics and Dielectric Strength in Multilayer Insulation Systems for MVDC Cables in Future All-Electric Wide-Body Aircraft 未来全电动宽体飞机MVDC电缆多层绝缘系统局部放电特性及介电强度分析

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-04 DOI: 10.1109/TDEI.2025.3557779

Anoy Saha;Saikat Chowdhury;Md Asifur Rahman;Mona Ghassemi

{"title":"Analysis of Partial Discharge Characteristics and Dielectric Strength in Multilayer Insulation Systems for MVDC Cables in Future All-Electric Wide-Body Aircraft","authors":"Anoy Saha;Saikat Chowdhury;Md Asifur Rahman;Mona Ghassemi","doi":"10.1109/TDEI.2025.3557779","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3557779","url":null,"abstract":"The design of lightweight, high-power medium-voltage direct current (MVdc) cables is crucial for future all-electric aircraft (AEA) to ensure reliable performance and durability under harsh environmental conditions. These cables must effectively mitigate partial discharge (PD) and insulation degradation to support the high-power demands of next-generation aviation. In our previous work, we developed multilayer multifunctional electrical insulation (MMEI) systems to tackle these challenges. This article presents the detailed experimental studies conducted on these MMEI structures, both as flat samples and cable prototypes. Among all the designed MMEI structures, previously designed ARC-SC-T-MMEI was selected for PD study due to its multifunctionality. First, the flat sample for the selected MMEI design is fabricated, and the fabrication process is optimized by analyzing the PD characteristics observed under different fabrication conditions. Building upon these findings, a cable prototype is created using the optimized MMEI samples. Subsequently, the PD behavior of the optimized fabricated samples is investigated under varying pressure levels to replicate the actual conditions encountered in an aircraft environment. The PD behavior of this cable prototype is rigorously studied and analyzed using the Pearson correlation coefficient to assess its performance and reliability in operational conditions. Furthermore, the dielectric strength of these samples is examined under dc voltage. A two-parameter Weibull distribution is used to analyze the effect of pressure on the breakdown of the fabricated samples. This article provides detailed insights into the fabrication and performance analysis of MMEI systems under dc voltage at atmospheric and low pressures.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2284-2293"},"PeriodicalIF":3.1,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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IEEE Transactions on Dielectrics and Electrical Insulation Information for Authors IEEE Transactions on Dielectrics and Electrical Insulation 给作者的信息

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-02 DOI: 10.1109/TDEI.2025.3551404

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IEEE Transactions on Dielectrics and Electrical Insulation Publication Information IEEE电介质与电绝缘学报

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-02 DOI: 10.1109/TDEI.2025.3551410

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IEEE Dielectrics and Electrical Insulation Society Information 电介质和电气绝缘协会信息

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-04-02 DOI: 10.1109/TDEI.2025.3551408

引用次数: 0