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

Microscopic Protection Mechanisms of Antioxidants on Vegetable Oils at Different Moisture Levels Based on Quantum Mechanics and Reactive Molecular Dynamic Simulations 基于量子力学和反应分子动力学模拟的抗氧化剂对不同水分水平植物油微观保护机制

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-15 DOI: 10.1109/TDEI.2025.3530332

Xuefeng Hu;Haoxi Cong;Shaomin Quan;Wenjing Su;Yuxin Wang;Zhaoling Liu;Li Xie;Yangchun Cheng;Qingmin Li

{"title":"Microscopic Protection Mechanisms of Antioxidants on Vegetable Oils at Different Moisture Levels Based on Quantum Mechanics and Reactive Molecular Dynamic Simulations","authors":"Xuefeng Hu;Haoxi Cong;Shaomin Quan;Wenjing Su;Yuxin Wang;Zhaoling Liu;Li Xie;Yangchun Cheng;Qingmin Li","doi":"10.1109/TDEI.2025.3530332","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3530332","url":null,"abstract":"New transformers using vegetable oils as insulating liquids have promising applications, but the oxidative stability of vegetable oils limits their development. Currently, an effective improvement method is adding antioxidants. In this article, simulations based on quantum mechanics and reactive molecular dynamics are used to study the molecular properties of different antioxidants and their protective effect on vegetable oils at different moisture levels. The results showed that propyl gallate (PG) has a higher molecular polarity index (MPI) and more molecular polar surface area than tert-butyl hydroquinone (TBHQ) and butyl hydroxytoluene (BHT). As a result, PG has a higher polarity and can create more hydrogen bonds with water and triglycerides. Due to the smaller molecular orbital gap of PG, it is easier to protect against the molecular degradation of vegetable oils. PG has higher antioxidant activity than TBHQ and BHT. However, PG is hydrophilic and will be affected at high moisture levels and its antioxidant performance will be reduced. This research reveals the molecular characteristics of antioxidants at the microscopic level and proposes the influence laws of antioxidants on vegetable oils. It provides theoretical support for the application of vegetable oils in large-scale oil-immersed transformers.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1252-1262"},"PeriodicalIF":2.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213588","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

A Self-Clearing Electrode Concept for Dielectric Elastomer Applications Using Single-Wall Carbon Nanotubes Line 基于单壁碳纳米管的介电弹性体自清除电极概念

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-15 DOI: 10.1109/TDEI.2025.3530384

Zihang Xu;Zepeng Lv;Chen Zhang;Kai Wu;Peter Morshuis;Aurore Claverie

{"title":"A Self-Clearing Electrode Concept for Dielectric Elastomer Applications Using Single-Wall Carbon Nanotubes Line","authors":"Zihang Xu;Zepeng Lv;Chen Zhang;Kai Wu;Peter Morshuis;Aurore Claverie","doi":"10.1109/TDEI.2025.3530384","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3530384","url":null,"abstract":"For the electronic components made of electroactive polymer (EAP) materials, a breakdown between the compliant electrodes is the main cause of failure. Similar to high-voltage capacitors, a self-clearing mechanism is needed to minimize the probability of a single defect leading to complete failure. In order to meet compliance and self-clearing needs, single-wall carbon nanotube (SWCNT) films are widely used. However, the complex and expensive process of manufacturing of large-area SWCNT film hinders its application in industry. To reduce the usage of SWCNT while maintaining self-clearing properties, a novel stretchable and self-clearing electrode configuration is proposed in this article, using a patterned electrode consisting of carbon black (CB) connected by SWCNT line. A criterion was established for a successful self-clearing process of the SWCNT line electrode. Some key factors affecting the self-clearing properties were investigated. It was found that high breakdown voltage and thin and narrow SWCNT line electrodes are beneficial to the self-clearing success rate. Besides the self-clearing properties, the effect of the size and number of the CB patterns on capacitance retention was studied. After a self-clearing event, part of the active area of the dielectric is lost. The objective is to maximize capacitance retention after a self-clearing event, which was analyzed experimentally and theoretically. Finally, it is suggested how to select the number and area of the patterned CB, making optimal use of the electrode area. This study provides a theoretical and experimental basis for further mass production of carbon-based self-clearing electrodes.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"632-640"},"PeriodicalIF":2.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761564","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

Effect of Hydro-Oleophobicity Coating on Swelling and Insulation Properties of SiR for Cable Accessories 疏水疏油涂层对电缆附件用SiR膨胀及绝缘性能的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-14 DOI: 10.1109/TDEI.2025.3529432

Yunqi Xing;Ziyi Zhang;Siqian Cui;Junwei Zha;Wenbo Zhu;Hongbo Liu;Baixin Liu

引用次数: 0

Electrical Performance Analysis of Enameled-Extruded Wires Based on Partial Discharges and Voltage Endurance 基于局部放电和耐压的漆包线电性能分析

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-14 DOI: 10.1109/TDEI.2025.3529417

Giovana Pereira Dos Santos Lima;Sonia Ait-Amar;Gabriel Vélu

{"title":"Electrical Performance Analysis of Enameled-Extruded Wires Based on Partial Discharges and Voltage Endurance","authors":"Giovana Pereira Dos Santos Lima;Sonia Ait-Amar;Gabriel Vélu","doi":"10.1109/TDEI.2025.3529417","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3529417","url":null,"abstract":"This study aims to explore an economically feasible enameled wire technology based on sol-gel, offering enhanced performance compared to traditional enameled wire. The evaluation involves assessing insulation configurations for copper wires designed for high-temperature applications, with a proposed configuration combining sol-gel solution on enamel and polyphenylene sulfide (PPS) extrusion resins. Electrical performance is compared across these insulation configurations, building upon their demonstrated higher thermal performance in prior research. Experimental data, including partial discharge (PD) parameters, dielectric strength, and electrical aging endurance, are collected from twisted pair samples for each insulation type. Promising results emerge from PD studies, favoring hybrid technology (enameled-extruded wires) over the classical approach polyesterimide (PEI) + polyamide (PAI) enameled wires. Measurements reveal a higher intensity of PDs for classical enameled wires under 3 kV–50 Hz. Moreover, lifespan models under voltage stress indicate that enameled-extruded wires with PPS extruded resin have advantages, withstanding 1525 min compared to 530 min for classical wires under 3 kV–50 Hz. A correlation between lifespan under voltage stress and PD intensity is observed. Furthermore, microfillers on PPS show lower results compared to nonfilled enameled -extruded wire configurations.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1191-1198"},"PeriodicalIF":2.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783271","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

Partial Discharge Characteristics of the Metal-Insulation Interface Under Repetitive Microsecond Pulse Voltage 重复微秒脉冲电压下金属-绝缘界面局部放电特性研究

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-10 DOI: 10.1109/TDEI.2025.3528315

Menghan Yu;Lanjun Yang;Jian Wu;Lin Cheng

{"title":"Partial Discharge Characteristics of the Metal-Insulation Interface Under Repetitive Microsecond Pulse Voltage","authors":"Menghan Yu;Lanjun Yang;Jian Wu;Lin Cheng","doi":"10.1109/TDEI.2025.3528315","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3528315","url":null,"abstract":"This study investigated the discharge characteristics of the metal-insulation interface under repetitive frequency pulse voltage by examining partial discharge, which commonly arises from unavoidable manufacturing defects at this interface. Three test configurations with varying electrode-dielectric gaps were devised and fabricated. The focus of the study was to analyze the characteristics and development process of partial discharge under repetitive frequency pulse voltage, as well as to explore the relationship between partial discharge and lifespan. A comparative analysis of the partial discharge characteristics among the three different configurations was conducted. Simulation calculations were performed to evaluate the instantaneous local temperature rise caused by partial discharge, revealing that the high temperature and high pressure generated during discharge play critical roles in film breakdown. Additionally, the study examined the trend of the first discharge voltage concerning the number of applied pulses in different configurations. The results indicated that in air-filled gaps, the first discharge voltage exhibited a trend of increase-decrease-increase, with the relationship between the maximum rise rate of the first discharge voltage in the early stage and the sample life following a power relationship characterized by a power exponent of −0.92. In the oil-gap configuration, the process of oil gap discharge generating bubbles and subsequent discharge within these bubbles resulted in a significant drop in the first discharge voltage. Furthermore, a negative power relationship was established between the decrease rate of the first discharge voltage and the remaining life in this configuration.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1451-1459"},"PeriodicalIF":2.9,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213584","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

Insulation Structure Design for ±550-kV DC GIS Based on Multiobjective Optimization Algorithm 基于多目标优化算法的 ±550 千伏直流 GIS 绝缘结构设计

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-09 DOI: 10.1109/TDEI.2025.3527915

Boya Zhang;Haifei Tao;Yixuan Li;Xingwen Li;Zhenle Nan;Wei Luo;Yao Zheng;Guoli Wang

{"title":"Insulation Structure Design for ±550-kV DC GIS Based on Multiobjective Optimization Algorithm","authors":"Boya Zhang;Haifei Tao;Yixuan Li;Xingwen Li;Zhenle Nan;Wei Luo;Yao Zheng;Guoli Wang","doi":"10.1109/TDEI.2025.3527915","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527915","url":null,"abstract":"In high-voltage direct current gas-insulated switchgear (HVdc GIS), the problem of surface charge accumulation on insulators has garnered significant attention, limiting the development of dc GIS at high voltage levels. This study proposes an insulation structure optimization method based on a multiobjective optimization method to balance the tangential and normal electric fields on the insulator surface and mitigate local electric stress, achieving efficient and precise GIS insulation structure design. The optimization objectives include the tangential electric field and surface charge density. The study utilizes nondominated sorting genetic algorithm II (NSGA-II) and response surface methodology (RSM) to obtain the optimal structure for the conical insulator and shield of ±550-kV dc GIS. In addition, the study investigates the impact of gap distance on the surface charge and electric field distribution of the insulator. Ultimately, following insulation optimization design criteria, the study achieves the optimal structure and gap distance for ±550-kV GIS, providing crucial insights for the insulation design of HVdc GIS.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1064-1073"},"PeriodicalIF":2.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783201","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

Aggregation Characteristics of Cellulose Particles of Different Sizes in Transformer Oil Under DC Electric Field 直流电场作用下不同粒径纤维素颗粒在变压器油中的聚集特性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527424

Xuan Meng;Haotian Wang;Yang Zhou;Xutao Han;Xuanrui Zhang;Junhao Li

{"title":"Aggregation Characteristics of Cellulose Particles of Different Sizes in Transformer Oil Under DC Electric Field","authors":"Xuan Meng;Haotian Wang;Yang Zhou;Xutao Han;Xuanrui Zhang;Junhao Li","doi":"10.1109/TDEI.2025.3527424","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527424","url":null,"abstract":"Under dc electric field, the migration and accumulation of cellulose particles in transformer oil will affect the oil insulation strength, thus threatening the normal operation of the converter transformer. In this work, a cellulose particle behavior observation platform is constructed, and the behavioral characteristics of cellulose particles of different particle sizes in transformer oil are analyzed through experimental and theoretical comparisons. The results show that the particle chains formed by large-sized cellulose particles extend relatively faster on the electrode surface, with relatively longer length and sparser distribution, making it easier to form stable cellulose bridges within the oil gap. Correspondingly, small-sized cellulose particles are difficult to form stable cellulose bridges in the oil gap. The increase in cellulose particle concentration has limited impact on the length of particle chains, thus it remains challenging for small particles with higher concentrations to form bridges. The external field force primarily influences the movement of particles between the electrodes, while the interparticle force mainly impacts the aggregation effect of the particles. Dipole interactions dominate in the formation of particle chains and are relatively stronger between ellipsoidal particles.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1557-1566"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205971","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

Performance Evaluation of Aeronautical Cables in Semi-Coaxial Geometries: A Novel Test Approach 航空电缆半同轴几何性能评价：一种新的试验方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3526091

Sofia P. Mavidou;David Clark;Michail Michelarakis;Christopher Stone;A. Manu Haddad

引用次数: 0

Dielectric, Mechanical, and Breakdown Properties of Liquid Silicone Rubber Under Different Thermal Aging Conditions 液体硅橡胶在不同热老化条件下的介电、力学和击穿性能

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527431

Boxue Du;Yongping Hou;Xiaoxiao Kong;Qiang Fu

{"title":"Dielectric, Mechanical, and Breakdown Properties of Liquid Silicone Rubber Under Different Thermal Aging Conditions","authors":"Boxue Du;Yongping Hou;Xiaoxiao Kong;Qiang Fu","doi":"10.1109/TDEI.2025.3527431","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527431","url":null,"abstract":"To investigate the effect of thermal aging on the liquid silicone rubber (LSR) used for dry-type transformers, various LSR samples are aged at different temperatures of <inline-formula> <tex-math>$225~^{circ }$ </tex-math></inline-formula>C, <inline-formula> <tex-math>$250~^{circ }$ </tex-math></inline-formula>C, <inline-formula> <tex-math>$275~^{circ }$ </tex-math></inline-formula>C, and <inline-formula> <tex-math>$300~^{circ }$ </tex-math></inline-formula>C, with different aging times of 24, 48, 96, 336, and 504 h. The experimental results show that the aging process of LSR can be roughly divided into two stages depending on the result of competition between crosslinking reaction and fracture reaction, as evidenced by the FTIR. In the early stage, dc conductivity and integral charge Q(t) decrease, while the breakdown strength increases with the aging time increases, which are attributed to the more compact network structure caused by crosslinking reaction. The later stage is dominated by facture reaction with the deepening of thermal aging. Dielectric properties begin to show a decreasing trend. The breakdown strength could be reduced by 16.5% at <inline-formula> <tex-math>$300~^{circ }$ </tex-math></inline-formula>C with 504 h. Meanwhile, the mechanical properties of the tensile strength and the elongation at break are decreased by 73.2% and 85.2% after 504 h thermal aging at <inline-formula> <tex-math>$504~^{circ }$ </tex-math></inline-formula>C, respectively. Dielectric spectra are investigated under different aging conditions, and differential processing is performed to distinguish the different aging state of the LSR. The results show that the loss peak shifts toward the low frequency as the aging degrees increase. This article aims to provide a theoretical basis for the application of LSR for dry-type transformers.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"273-280"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106403","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

Effect of Electrical Field on Conductivity of Synthetic Ester Induced by Space Charge Accumulation 电场对空间电荷积累诱导合成酯电导率的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527414

Rui Yu;Shanika Matharage;Shuhang Shen;Zhongdong Wang;Motoo Tsuchie;Masahiro Kozako;Masayuki Hikita

{"title":"Effect of Electrical Field on Conductivity of Synthetic Ester Induced by Space Charge Accumulation","authors":"Rui Yu;Shanika Matharage;Shuhang Shen;Zhongdong Wang;Motoo Tsuchie;Masahiro Kozako;Masayuki Hikita","doi":"10.1109/TDEI.2025.3527414","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527414","url":null,"abstract":"Synthetic ester has emerged as an alternative in applications where mineral oil has traditionally been used. Furthermore, their new applications in areas such as converter transformers and battery energy storage systems are currently being investigated. Conductivity of insulating materials is a crucial parameter for such new applications. This article investigates the impact of electrical field on the conductivity of synthetic ester through a combination of experimental and simulation studies. The experimental results indicate that short-term conductivity increases while long-term conductivity exhibits a nonlinear trend with applied electrical field. The simulation results show that the increase in the measured short-term conductivity is due to field-enhanced charge dissociation while the nonlinear trend in the measured long-term conductivity is a combined effect of space charge accumulation and field distortion. Furthermore, the simulation model incorporating space charge accumulation and charge injection is used to explain electrical field dependent conductivity phenomena, and key parameters and formulae describing field enhanced intrinsic and injected charge density are identified for synthetic ester and compared with those of mineral oil.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1279-1288"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213598","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