IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第3页

The Corrosion and Activation Mechanism of Thiophenic Sulfides in the Oil-Paper Insulation 噻吩类硫化物在油纸绝缘材料中的腐蚀及活化机理

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-02-04 DOI: 10.1109/TDEI.2025.3539260

Sihang Gao;Yuqing Lei;Yongxi Liu;Cong Huang;Lijun Yang

{"title":"The Corrosion and Activation Mechanism of Thiophenic Sulfides in the Oil-Paper Insulation","authors":"Sihang Gao;Yuqing Lei;Yongxi Liu;Cong Huang;Lijun Yang","doi":"10.1109/TDEI.2025.3539260","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3539260","url":null,"abstract":"The corrosive sulfides in the insulating oil have been confirmed to induce insulation faults; thereby, the corrosive sulfides can be removed during the refining process of oil to overcome the corrosion threat. Some inactive sulfides are retained to improve the oxidation stability of oil, mainly including thiophenic sulfides. However, the activation of thiophenic sulfides under the operating conditions and whether it causes corrosion of copper winding remain unclear. Therefore, this article focuses on the reaction mechanism of copper winding corrosion induced by the pyrolysis of thiophenic sulfides in oil from the perspective of microscopic reaction mechanism, mainly including the analysis of thermal decomposition products of thiophenic sulfides, the activation energy of thiophenic sulfides on varied heating rates, the molecular dynamics simulation of thiophenic sulfides degradation, and the thermal aging verification test. The results indicate that the pyrolysis products of thiophenic sulfides consist of sulfur-containing micromolecules and inorganic products, such as hydrogen sulfide and its ion (H2S, <inline-formula> <tex-math>${mathrm {HS}}^{-}$ </tex-math></inline-formula>), elemental sulfur (S, S2), and hydrogen and its ion (H2, H+). Thiophene has the lowest activation energy; thereby, it is the most prone to pyrolysis, followed by benzothiophene and dibenzothiophene. The continuous energy accumulation results in the decomposition of thiophenic sulfides due to long-term thermal action and generates low molecular corrosive sulfides, further intensifying the oil corrosivity and leading to the corrosion of oil-paper insulation.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1353-1363"},"PeriodicalIF":2.9,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213519","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介电学与电绝缘资讯汇刊

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-30 DOI: 10.1109/TDEI.2025.3530651

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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 : 2025-01-30 DOI: 10.1109/TDEI.2025.3530649

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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 : 2025-01-30 DOI: 10.1109/TDEI.2025.3530653

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Insulation Deterioration of Cables as the Downlead for Unibody Composite Pylons Under Lightning Dielectric Barrier Discharge 雷电介质阻挡放电下一体复合塔引线电缆绝缘劣化

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-23 DOI: 10.1109/TDEI.2025.3527419

Kai Yin;Tianyin Zhang;Zelin Hong;Taqi ur Rahman;Jiale Song;Jing Li;Xiangrong Chen

{"title":"Insulation Deterioration of Cables as the Downlead for Unibody Composite Pylons Under Lightning Dielectric Barrier Discharge","authors":"Kai Yin;Tianyin Zhang;Zelin Hong;Taqi ur Rahman;Jiale Song;Jing Li;Xiangrong Chen","doi":"10.1109/TDEI.2025.3527419","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527419","url":null,"abstract":"Cables are suitable as downleads of a composite pylon to provide the ground potential for the shielding wires. However, the impact of lightning-induced plasma on the cross-linked polyethylene (XLPE) layer remains unclear when lightning current passes through the cable downlead. To explore the deterioration mechanism of the cable layer under lightning striking, the XLPE samples are treated with high-frequency plasma for different durations. Subsequently, surface morphology and molecular bonds are characterized, and electrical properties such as dielectric spectroscopy, surface potential decay, trap density, conductivity, and breakdown strength are evaluated. Additionally, a 2-D axisymmetric model of the pylon is developed to analyze the electric field distribution using the finite element method (FEM). The findings demonstrate that thermo-oxidative induced by high-frequency DBD breaks the XLPE chains, resulting in increased dielectric constant and conductivity, shallower traps, and reduced breakdown strength. Moreover, high-frequency DBD not only deteriorates the downlead cable’s insulation properties but also deforms the material and roughens the surface, consequently amplifying the electric field distortion at the cable-air interface and lowering the partial discharge inception voltage on the cable surface. This study elucidates the degradation mechanism of downlead cables under lightning plasma and offers insights into selecting appropriate cable insulation materials.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1760-1767"},"PeriodicalIF":2.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196743","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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Effect of Residual Crosslinking By-Products on Thermal Stability of EHVDC Cable Insulation 残余交联副产物对超高压直流电缆绝缘热稳定性的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-23 DOI: 10.1109/TDEI.2025.3533458

Fei Li;Lei Jiang;Dong Wang;Jinghui Gao;Lisheng Zhong

{"title":"Effect of Residual Crosslinking By-Products on Thermal Stability of EHVDC Cable Insulation","authors":"Fei Li;Lei Jiang;Dong Wang;Jinghui Gao;Lisheng Zhong","doi":"10.1109/TDEI.2025.3533458","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3533458","url":null,"abstract":"The extra high-voltage direct current (EHVDC) cable has attracted tremendous attention owing to its high capacity and low loss for long-distance power transmission. Temperature stability has become one of the important issues for EHVDC cable system because of the thick insulation under stringent operational conditions. However, its relationship with cable manufacture and processing, for example, degassing, is still missing. In this article, we investigate the role of residual crosslinking by-product (e.g., cumyl alcohol) on thermal stability of EHVDC cable insulation by proposing a phase field model combined with finite element analysis. Results show that the long-time degassing process eliminates 20% cumyl alcohol from cable insulation, reducing its conductivity, which has negligible impact on the electric field distortion. Further thermal stability simulations suggest that the declined conductivity contributes to a decrease in leakage current and dielectric loss within cable insulation, thus effectively reducing the risk of thermal runaway. This work proposes an effective approach to quantitatively analyze the role of crosslinking by-products and provides a guideline for developing high-reliability EHVDC cable systems.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1737-1744"},"PeriodicalIF":2.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196673","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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Aging of Environmentally Friendly Insulation Gases by Free-Burning Arcs: Technical Air 自由燃烧电弧对环保绝缘气体的老化：技术空气

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-22 DOI: 10.1109/TDEI.2025.3532882

Arik Subhana;Nina Sasaki Støa-Aanensen;Cédric Lesaint;Marte Gammelsæter;Frank Mauseth

{"title":"Aging of Environmentally Friendly Insulation Gases by Free-Burning Arcs: Technical Air","authors":"Arik Subhana;Nina Sasaki Støa-Aanensen;Cédric Lesaint;Marte Gammelsæter;Frank Mauseth","doi":"10.1109/TDEI.2025.3532882","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3532882","url":null,"abstract":"This article investigates the effect of aging due to free-burning arcs on the dielectric performance and the chemical composition of technical air (79% N2 and 21% O2) at 1.3-bar absolute pressure. The aging is performed by exposing the gas to a series of arcs dissipating an accumulated energy of more than 300 kJ, a level corresponding to relevant arcing energies for medium-voltage (MV) load break switches. To evaluate the long-term dielectric performance, lightning impulse (LI) and power frequency AC breakdown tests are conducted in a 10-mm rod–plane gap before and after aging. Gas decomposition is also investigated with gas chromatography coupled with mass spectrometry (GC–MS). Results indicate that the LI breakdown voltage of air may enhance temporarily after arcing. This is probably due to the formation of short-lived air byproducts (e.g., NO, NO2, NO3, and O3) which may reduce initial electron generation. However, changes in AC breakdown voltage might not be that significant as the presence of primary electrons is presumably guaranteed in the latter case.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1528-1538"},"PeriodicalIF":2.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206171","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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Experimental Studies on Synergistic Effects, Electrode Erosion, and Decomposition Characteristics of SF₆ Admixture in Divergent Fields 顺丰号外加剂在发散场的协同效应、电极侵蚀及分解特性试验研究

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-20 DOI: 10.1109/TDEI.2025.3530327

Vinod Kumar Gandi;Rishi Verma;Gursharn Singh;Manoj Kumar Warrier;Archana Sharma

{"title":"Experimental Studies on Synergistic Effects, Electrode Erosion, and Decomposition Characteristics of SF₆ Admixture in Divergent Fields","authors":"Vinod Kumar Gandi;Rishi Verma;Gursharn Singh;Manoj Kumar Warrier;Archana Sharma","doi":"10.1109/TDEI.2025.3530327","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3530327","url":null,"abstract":"Sulfur hexafluoride (SF6) gas is a potent greenhouse gas, and there has been research into more environmentally friendly gases as a replacement to SF6 in HV equipment. The research into alternative gases has shown that SF6 admix have a promising dielectric property as comparable to pure SF6. In this article, the synergistic effects of adding a dopant gas (SF6) to nonelectron affinity gases such as N2, dry air, and Ar are tested with varied volumetric concentrations of SF6 by using a HV co-axial sparkgap (SG) switch under partial discharge (PD), that is, point-plane topology. The experimentation is carried out with doped gas concentration varying from 5% to 50% for operating pressure levels of 0.0345–0.172 MPa with interelectrode distance of 0.4 cm. The binary mixture of SF6 with N2 and dry air exhibits a higher synergism with <inline-formula> <tex-math>$varphi $ </tex-math></inline-formula> (SF6) ~5%. Furthermore, in SF6/N2 and SF6/dry air, the synergistic effects exhibit a saturated behavior with rise in <inline-formula> <tex-math>$varphi $ </tex-math></inline-formula>(SF6). Unlike SF6/N2, the growth rate of breakdown voltage (BDV) in SF6/Ar is greatly reduced at higher pressure with low % by vol. of SF6. Apart from breakdown study, the decomposition characteristics and electrode erosion rates of SF6/N2 has been investigated. The comprehensive experimental investigations reported herein present the application feasibility of these admixtures as a replacement to SF6.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1468-1475"},"PeriodicalIF":2.9,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205970","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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Effect of SiC Grain Size on Curing and Dielectric Properties of SiC/EP Composites SiC晶粒尺寸对SiC/EP复合材料固化和介电性能的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-17 DOI: 10.1109/TDEI.2025.3531340

Ning Guo;Jiawen Wang;Chang Han;Yuanzheng Dong;Haitao Hu;Junguo Gao

{"title":"Effect of SiC Grain Size on Curing and Dielectric Properties of SiC/EP Composites","authors":"Ning Guo;Jiawen Wang;Chang Han;Yuanzheng Dong;Haitao Hu;Junguo Gao","doi":"10.1109/TDEI.2025.3531340","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3531340","url":null,"abstract":"This study investigates the preparation and properties of silicon carbide/epoxy (SiC/EP) composites, using epoxy resin as the matrix and micrometer-sized SiC particles as the inorganic filler. The influence of particle size on the curing behavior and dielectric properties of the composites is systematically analyzed. The scanning electron microscopy (SEM) confirms the absence of significant cross-sectional defects and shows that smaller particle sizes enhance the connectivity of SiC particles. Isothermal curing experiments indicate that a reduction in particle size improves the degree of cure in the composites. Conductivity measurements reveal that composites with smaller SiC particles exhibit lower conductivity and achieve a higher nonlinear coefficient, reaching a maximum of 6.31. Breakdown field tests demonstrate a nonlinear trend, with the breakdown field initially decreasing and subsequently increasing as particle size decreases. Similarly, dielectric spectrum analysis shows that the relative dielectric constant and dielectric loss first increase and then decrease with the reduction in SiC particle size.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1395-1402"},"PeriodicalIF":2.9,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213647","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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Improvement of Polypropylene/Silicone Rubber Interface by Insulating Oils With Pressure Optimization 基于压力优化的绝缘油改善聚丙烯/硅橡胶界面

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.2025.3530387

Zhaorui Luo;Jincheng Chu;Liyan Wang;Tianhe Lu;Zhengbing Tian;Zhonglei Li;Zhi Fang;Xi Zhu

{"title":"Improvement of Polypropylene/Silicone Rubber Interface by Insulating Oils With Pressure Optimization","authors":"Zhaorui Luo;Jincheng Chu;Liyan Wang;Tianhe Lu;Zhengbing Tian;Zhonglei Li;Zhi Fang;Xi Zhu","doi":"10.1109/TDEI.2025.3530387","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3530387","url":null,"abstract":"Cable accessory insulation system is inevitably affected by its interface states causing insulation failure. Insulating oils are often applied in the interface with a certain pressure to improve its performance, but the mismatching and degradation of polymer in insulating oils seriously affect the interface stability. This study focuses on polypropylene (PP) insulation and aims to improve its typical accessory interface with silicone rubber (SIR) by insulating oils with pressure. Results show that hydrocarbon oil has the biggest negative impact on PP with the most mass increment, more surface deposits, and significant deteriorating in both mechanical and electrical properties. By contrast, appropriate absorption of Si-containing oil helps modify surface and fill initial defects of PP, promoting insulating performance. Furthermore, it is found that interface pressure is conductive to fabricate a stable PP/insulating oil/SIR structure with excellent insulating performance. However, excessive pressure causes a negative impact due to interface deformation of materials. Based on the analysis of interface microstructure and the calculation of contact stress between metal electrode and polymer, the mechanism of coupling interaction among polymer, insulating oil, and external pressure is revealed. This research on the improvement of insulation interface can provide a key reference and basis for the manufacturing and optimizing of cable insulation.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1289-1296"},"PeriodicalIF":2.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213646","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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