High Voltage最新文献_第9页

Anomalous-Energy Runaway Electrons Originating in Fast Ionisation Wave During Pulsed Gas Breakdown 脉冲气体击穿过程中快速电离波中产生的异常能量失控电子

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-07-24 DOI: 10.1049/hve2.70075

Bangdou Huang, Chenhua Ren, Cheng Zhang, Edl Schamiloglu, Tao Shao

引用次数: 0

Performance Evolution and Ageing Characteristics of Crosslinked Polyethylene Insulation for HVDC Cables After Field Operation 高压直流电缆交联聚乙烯绝缘的性能演变及老化特性

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-02-11 DOI: 10.1049/hve2.70162

Ying Liu, Jiazhu Yu, Meng Ma

{"title":"Performance Evolution and Ageing Characteristics of Crosslinked Polyethylene Insulation for HVDC Cables After Field Operation","authors":"Ying Liu, Jiazhu Yu, Meng Ma","doi":"10.1049/hve2.70162","DOIUrl":"10.1049/hve2.70162","url":null,"abstract":"The ± 200 kV direct current (DC) cables of the Zhoushan Transmission Project were targeted, and crosslinked polyethylene (XLPE) insulation samples were prepared from faulty and spare cables. Samples were tested for oxidation induction period, Fourier transform infrared spectroscopy, differential scanning calorimetry, thermally stimulated depolarisation current, space charge and DC dielectric strength. The evolution of performance parameters was analysed, and the insulation ageing characteristics of onsite operating DC cables were deduced. The results show that compared with spare cables, the carbonyl index of operating cables decreases, the crystallinity increases and DC dielectric strength increases slightly. It is inferred being related to the reduced content of antioxidants and crosslinking by-products and improved molecular chain and crystal microstructure of XLPE insulation. It is suggested that the insulation ageing of high voltage DC XLPE cable is divided into two stages. In the early stage, the secondary crosslinking and recrystallisation processes are dominant, and the thermal and electric effects make the material properties basically stable or even slightly improved. In the middle and later stage, the thermal oxygen reaction is dominant, the microstructure of the material is destroyed, with a large number of macromolecular chains broken and some crystalline regions transformed into amorphous ones, and the insulation properties degraded significantly.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"60-72"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146160571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation-Based Material Design for HVDC Cable Accessories 基于仿真的高压直流电缆附件材料设计

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-01-28 DOI: 10.1049/hve2.70155

Thi Thu Nga Vu, Gilbert Teyssèdre, Séverine Le Roy

{"title":"Simulation-Based Material Design for HVDC Cable Accessories","authors":"Thi Thu Nga Vu, Gilbert Teyssèdre, Séverine Le Roy","doi":"10.1049/hve2.70155","DOIUrl":"10.1049/hve2.70155","url":null,"abstract":"The worldwide increasing demand for electricity, coupled with the need for more reliable infrastructures and more interconnected networks, has put forward high voltage direct current (HVDC) technologies for energy transmissions. Questions still arise as regards synthetic insulation for cable systems and accessories, as it remains one of the weak points in energy transmission lines. The field distribution in such systems intimately depends upon the electrical conductivity, being temperature and field dependent, and upon the cable/accessory geometry, that is its design. Optimising the design equates to homogenising as much as possible the electric field, particularly the tangential field at the interface between dielectrics, and avoiding field hot spots. Different designs for cable accessory are conceivable that do not necessarily involve the interposition of a field grading layer between the cable insulation and the joint body. In this work, we explore different evolutions of the design, spanning from geometry refinement to setting a two-layers joint body. The idea of keeping the same polymer and using fillers to impart nonlinearity to the conductivity is put forward. Results show that significant reduction of field maxima can be reached with this design. The so-constructed fictive material appears feasible considering literature data. Whether full objects can be produced is an open question.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"25-36"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experiments and Simulations on the Equivalence of Pre-Cross-Linking in Cable Insulation Material Extrusion 电缆绝缘材料挤压预交联等效性的实验与仿真

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-02-16 DOI: 10.1049/hve2.70163

Zhuxin Ma, Kun Wang, Peng Cheng, Tianpeng Yang, Weikang Li, Bo Qiao, Wei Yang, Ming Wu, Lisheng Zhong

{"title":"Experiments and Simulations on the Equivalence of Pre-Cross-Linking in Cable Insulation Material Extrusion","authors":"Zhuxin Ma, Kun Wang, Peng Cheng, Tianpeng Yang, Weikang Li, Bo Qiao, Wei Yang, Ming Wu, Lisheng Zhong","doi":"10.1049/hve2.70163","DOIUrl":"10.1049/hve2.70163","url":null,"abstract":"The rheological properties of cable insulation materials are critical to the long-term continuous extrusion performance of high-voltage cables, with the pre-cross-linking effect playing a key role in determining the rheological behaviour of the insulation material during extrusion. Considering the pre-cross-linking effect, this study investigates the influence of molecular structure on the extrusion temperature, viscosity and shear rate distribution of insulation materials through equivalence experiments and simulations. The results indicate that the maximum temperature of 143°C occurs at the extrusion die land, where pressure and shear rate are highest. Furthermore, based on the optimised simulation model with experimental results, an empirical formula was established for predicting the maximum extrusion temperature of different insulation materials. This study reveals that although an increased terminal double-bond content in low-density polyethylene (LDPE) enhances the reactivity of insulation materials and reduces their shelf life, it also allows for a reduction in cross-linking agent content, thereby mitigating pre-cross-linking. Insulation materials with a higher long-chain branching degree and terminal double-bond content in LDPE, combined with a lower cross-linking agent content, are less susceptible to pre-cross-linking, which are more suitable for long-length submarine cables, whereas the reduced by-products also benefit the manufacture of DC cables; high-speed shear promotes the diffusion of the cross-linking agent dicumyl peroxide and enhances its interaction with the polyethylene chains. This research elucidates the influence of pre-cross-linking on the extrusion performance of insulation materials and develops an insulation material formulation more suitable for long-duration extrusion.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"37-48"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146215663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Learning-Based Ageing Assessment of Silicone Rubber 基于学习的硅橡胶老化综合评价

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-08-13 DOI: 10.1049/hve2.70082

Xinzhe Yu, Kun Zhang, Zhenan Zhou, Zheyuan Liu, Yu Deng, Chen Gu, Songsong Zhou, Dongxu Sun

{"title":"Integrated Learning-Based Ageing Assessment of Silicone Rubber","authors":"Xinzhe Yu, Kun Zhang, Zhenan Zhou, Zheyuan Liu, Yu Deng, Chen Gu, Songsong Zhou, Dongxu Sun","doi":"10.1049/hve2.70082","DOIUrl":"10.1049/hve2.70082","url":null,"abstract":"The surface ageing of silicone rubber composite insulators, widely used in power systems, poses significant challenges. This study integrates Fourier transform infrared (FTIR) spectroscopy with machine learning to evaluate ageing states and explore underlying mechanisms under various environmental conditions. A dataset covering light, medium, and severe ageing was built through FTIR experiments, spectral feature extraction, and data augmentation. An ensemble learning model achieved a classification accuracy of 95.42%. SHapley Additive exPlanations (SHAP) analysis indicated that silicon–oxygen backbones, silylmethyl groups, and hydroxyl groups are key to the ageing process. The silicon–oxygen backbone is dominant in initial oxidation and cross-linking, whereas silylmethyl group reactions occur later. Hydroxyl group changes are complex and strongly environment-dependent during severe ageing. The model was also applied to naturally aged samples from Tibet and Inner Mongolia, showing strong classification performance and revealing clear regional differences. These findings are valuable for assessing surface ageing, analysing ageing mechanisms and developing grading standards for composite insulators.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"210-222"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges 五十年来的地面闪络：二。极端环境和工业挑战

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-01-28 DOI: 10.1049/hve2.70150

Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li

{"title":"Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges","authors":"Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li","doi":"10.1049/hve2.70150","DOIUrl":"10.1049/hve2.70150","url":null,"abstract":"Modern high-voltage electrical equipment operates in complex environments where surface conditions are subjected to multifaceted influences from electric fields, thermal gradients, contaminants, irradiation and other extreme environmental factors. Under high-voltage conditions, surface flashovers frequently initiate at the gas–solid interface of insulators, jeopardising the operational reliability of industrial systems. To address flashover challenges in practical electrical equipment, this review systematically analyses the impact of environmental variables—including gaseous media, voltage waveforms, contaminants and high-energy irradiation—on surface flashover characteristics. Subsequently, we comprehensively synthesise the mechanisms, contributing factors, suppression techniques and enhancement strategies for surface flashover in four critical equipment categories prone to this phenomenon: high pulsed power systems, spacecraft operating in vacuum environments, gas-insulated switchgear/transmission lines (GIS/GIL) and outdoor insulators. The environmental dependencies of flashover behaviour in these systems are rigorously examined. Furthermore, to advance flashover prevention in next-generation industrial applications, this study identifies 25 fundamental scientific questions and 25 technical questions to guide future research directions. By establishing an integrated theoretical framework and methodological foundation for engineering-oriented flashover studies, this work provides actionable insights and mitigation approaches to enhance the surface insulation of modern industrial infrastructure.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"100-142"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Conductive Network Construction and Enhanced Thermal Conductivity in Mica Tape Composites for Large Generators by Pre-Placed h-BN@PDA-Modified Mica Paper 预置云母纸构建大型发电机用云母带复合材料导热网络及增强导热性能h-BN@PDA-Modified

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-09-19 DOI: 10.1049/hve2.70043

Zhonghua Zhang, Yu Feng, Xuesong Chen, Dongyue Wang, Zhanyi Wang, Liang Liang, Dong Yue, Qingguo Chen

{"title":"Thermal Conductive Network Construction and Enhanced Thermal Conductivity in Mica Tape Composites for Large Generators by Pre-Placed h-BN@PDA-Modified Mica Paper","authors":"Zhonghua Zhang, Yu Feng, Xuesong Chen, Dongyue Wang, Zhanyi Wang, Liang Liang, Dong Yue, Qingguo Chen","doi":"10.1049/hve2.70043","DOIUrl":"10.1049/hve2.70043","url":null,"abstract":"The lower thermal conductivity (TC) of mica tape hinders the evolution of large generators towards higher voltage and capacity. To enhance the TC of the mica tape, with the help of the three-dimensional (3D) multi-layer framework of the mica paper, a 3D polydopamine-coated boron nitride (h-BN@PDA) TC network was constructed by pre-placing h-BN@PDA inside the mica paper. Additionally, the above mica paper and epoxy-impregnated glass fabric were pressed to manufacture mica tape composites. Although the h-BN percentage remained constant, the TC of the h-BN@PDA/mica paper (or tape) composites could be further enhanced by depositing PDA over the h-BN surface. The TC of the 25wt.% h-BN@PDA/mica paper and mica tape composites reached 1.12 and 0.435 W/(m·K), which were 169.23% and 83.5% in comparison to pure mica paper and mica tape, respectively, also higher than those of the 25wt.% h-BN/mica paper and mica tape composites (1.07 and 0.416 W/(m·K), respectively). As calculated from theoretical modelling, this enhancement is due to the ability of the PDA coating to act as a ‘bridge’ to reduce the interfacial thermal resistance (ITR). In conclusion, the 3D TC network construction method in this research offers a new concept and strategy for manufacturing high-TC mica tapes.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"223-232"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145089930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation-Induced Degradation in Polymeric Materials: Alterations in Physical–Chemical Properties and Their Effects on Electrical Performance of Insulation Systems 辐射引起的聚合物材料降解：物理化学性质的改变及其对绝缘系统电气性能的影响

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-07-26 DOI: 10.1049/hve2.70071

Simone Vincenzo Suraci, Davide Fabiani

{"title":"Radiation-Induced Degradation in Polymeric Materials: Alterations in Physical–Chemical Properties and Their Effects on Electrical Performance of Insulation Systems","authors":"Simone Vincenzo Suraci, Davide Fabiani","doi":"10.1049/hve2.70071","DOIUrl":"10.1049/hve2.70071","url":null,"abstract":"This paper investigates the effects of radiation on polymeric materials used as insulation systems in electrical equipment such as cables for nuclear and particle accelerator applications. After a detailed description of the physics of radiation-induced damage in the polymeric matrix, a comprehensive analysis of the physical–chemical and electrical properties of aged materials is carried out, ranging from the microscopical ones (e.g., variation in crystallinity) to macroscopical ones (e.g., mechanical and electrical properties). In particular, significant attention is given to the electrical tests aiming at investigating the impact of free charges and radicals, induced by radiation, on conductivity and permittivity variations of the studied insulation system. The results show that electrical properties may successfully be correlated with state-of-the-art condition monitoring techniques, for example, oxidation level and mechanical resistance, suggesting the possibility to use electrical quantities as a diagnostic method for the nondestructive evaluation of the electrical equipment ageing state.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"150-169"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147569594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation Between Evaporation Dynamics and Self-Healing Characteristics in Metallised Polypropylene Films 金属化聚丙烯薄膜蒸发动力学与自愈特性的关系

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-09-05 DOI: 10.1049/hve2.70074

Zhi-Yuan Wu, Jian-Tao Wang, Zhi-Yuan Wang, Shao-Long Zhong, Lei Huang, Zhi-Min Dang, Wei Wang

{"title":"Correlation Between Evaporation Dynamics and Self-Healing Characteristics in Metallised Polypropylene Films","authors":"Zhi-Yuan Wu, Jian-Tao Wang, Zhi-Yuan Wang, Shao-Long Zhong, Lei Huang, Zhi-Min Dang, Wei Wang","doi":"10.1049/hve2.70074","DOIUrl":"10.1049/hve2.70074","url":null,"abstract":"The morphology and structure of electrodes play a pivotal role in determining the self-healing performance and current-carrying capacity of metallised biaxially oriented polypropylene (BOPP) films. An experimental setup replicating the industrial vacuum evaporation process and a custom-designed self-healing testing platform were specifically developed to systematically investigate the influence mechanisms of key evaporation parameters, including evaporation rate and evaporation thickness. As the evaporation rate increases from 2 to 5 <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>Å</mi>\u0000 </mrow>\u0000 <annotation> $mathrm{mathring{text{A}}}$</annotation>\u0000 </semantics></math>/s, both the self-healing area and energy are enhanced, whereas the edges of the self-healing morphology exhibit more pronounced fractal characteristics. At the microscale, low evaporation rates reduce and homogenise the micro-level current and decrease the invasion proportion of Al elements into the BOPP substrate. Notably, the metal growth mechanism on the surface of BOPP was clearly demonstrated through atomic force microscopy (AFM) to follow the representative ‘isolated metal islands’ model, resulting in varying current-carrying modes under different electrode thicknesses. Thicker electrodes exhibit significantly enhanced current-carrying capacity, accompanied by a simultaneous increase in self-healing area and energy. Finally, a surface model based on the Gaussian random function was constructed to numerically investigate the impact of surface roughness on current distribution, providing an explanation for the observed self-healing phenomenon.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"170-178"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-18

引用次数: 0