High Voltage最新文献_第8页

Dielectric Response of Large Band Gap Cyclic Olefines With Symmetric and Asymmetric Pendant Polar Groups 对称和不对称垂极性基团大带隙环烯烃的介电响应

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-06-24 DOI: 10.1049/hve2.70052

Qian Wang, Ying Zhou, Yanfeng Gao, Wenjin Wu, Jingyu Deng, Xidong Liang, Chao Wu

{"title":"Dielectric Response of Large Band Gap Cyclic Olefines With Symmetric and Asymmetric Pendant Polar Groups","authors":"Qian Wang, Ying Zhou, Yanfeng Gao, Wenjin Wu, Jingyu Deng, Xidong Liang, Chao Wu","doi":"10.1049/hve2.70052","DOIUrl":"10.1049/hve2.70052","url":null,"abstract":"The dielectric response of two typical polyoxafluoronorbornene with asymmetric and symmetric pendant polar groups is investigated to better understand the impact of the polymer structure on dielectric properties. Based on the Dissado–Hill modelling of broadband dielectric response, the contribution of the bicyclic backbone and fluorinated pendant groups to the dielectric response processes are decomposed. The characteristic frequency of γ-relaxation in polyoxafluoronorbornene is found to be far beyond the regular operation conditions. Thus, it can be utilised for the enhancement of permittivity for higher energy density. It is found that the rotation of the pendant benzene ring (β-relaxation) plays a significant role in determining the permittivity and loss. An asymmetric structure is effective in enhancing the permittivity, while a prominent decrease of loss can be achieved with the symmetric structure. Therefore, it should be kept in mind to suppress the dielectric loss when enhancing the dielectric constant as well as energy storage density via β-relaxation.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"143-149"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70052","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568491","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

Dielectric Properties and Insulation Performance of Nanocellulose Composite Films Enhanced by Hyperbranched Boron Nitride 超支化氮化硼增强纳米纤维素复合膜的介电性能和绝缘性能

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-02-16 DOI: 10.1049/hve2.70114

Yalin Zhao, Shen Zhao, Zhicong Miao, Yunqi Xing, Hongkun Wang, Rongjin Huang, Guangtong Ma

{"title":"Dielectric Properties and Insulation Performance of Nanocellulose Composite Films Enhanced by Hyperbranched Boron Nitride","authors":"Yalin Zhao, Shen Zhao, Zhicong Miao, Yunqi Xing, Hongkun Wang, Rongjin Huang, Guangtong Ma","doi":"10.1049/hve2.70114","DOIUrl":"10.1049/hve2.70114","url":null,"abstract":"Boron nitride (BN), characterised by its wide band gap and robust dielectric properties, has emerged as a promising filler for polymer-based dielectric composites. Nevertheless, its practical implementation in polymer matrices has been hindered by poor dispersibility and inadequate interfacial adhesion. This study addresses these challenges by developing hyperbranched polymer (HBP)-functionalised BN (HBP-BN) and fabricating HBP-BN/cellulose nanofiber (CNF) composite films via vacuum-assisted self-assembly. The HBP-BN/CNF films demonstrate a low dielectric loss (tanδ < 0.016) and significantly improved volume resistivity (109 Ω·m) and high thermal stability (55.36% residual mass at 800°C). Notably, the surface flashover voltage is elevated from 13.82 to 15.61 kV, demonstrating superior insulation capability. All these results highlight the promising potential of HBP-BN/CNF composite films for use as advanced dielectric materials, providing a novel approach to develop eco-friendly high-performance materials for high-voltage insulation systems in next-generation electronics and electrical devices.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"179-191"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146208641","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

Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching 机械拉伸作用下电缆附件用硅橡胶绝缘电性能研究

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-07-03 DOI: 10.1049/hve2.70025

Hao Hu, Binlong Cao, Yunxiao Zhang, Yuhao Liu, Zhidong Jia

{"title":"Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching","authors":"Hao Hu, Binlong Cao, Yunxiao Zhang, Yuhao Liu, Zhidong Jia","doi":"10.1049/hve2.70025","DOIUrl":"10.1049/hve2.70025","url":null,"abstract":"Silicone rubber (SR) is extensively used as insulation for cable accessories, directly affecting their design and operation. The distinctive feature of cable accessory insulation, operating under mechanical stretching, has not received sufficient attention in relevant standards and research. This study investigates two essential electrical parameters of SR insulation: relative permittivity and AC breakdown strength, analysing and summarising their variations during mechanical stretching. By comparing the parameter variations of SR samples with different filler contents and matrix compositions, the microscopic stretching behaviour and performance change mechanisms under mechanical stretching are explored. The results reveal the tensile effect on SR insulation, demonstrating that as the stretching ratio increases, the relative permittivity decreases, whereas the AC breakdown strength shows an increasing trend. Increasing filler content and incorporating low molecular weight components suppress the tensile effect, whereas decreasing filler content has the opposite effect. Given the significant correlation between these two parameters, the orientation and elongation of molecular chains are considered the primary factors influencing the tensile effect on SR insulation. This insight proposes a novel approach to control and optimise the performance of cable accessory insulation.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"201-209"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562680","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

Spectral Characteristics and Evolution Mechanism of Silicon Rubber Surface Discharge Under Thermal Ageing Condition 热老化条件下硅橡胶表面放电的光谱特征及演化机理

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-09-25 DOI: 10.1049/hve2.70067

Yanze Han, Liankang Zhang, Beibei Sun, Lu Liu, Guochang Li, Shengtao Li, Yanhui Wei

{"title":"Spectral Characteristics and Evolution Mechanism of Silicon Rubber Surface Discharge Under Thermal Ageing Condition","authors":"Yanze Han, Liankang Zhang, Beibei Sun, Lu Liu, Guochang Li, Shengtao Li, Yanhui Wei","doi":"10.1049/hve2.70067","DOIUrl":"10.1049/hve2.70067","url":null,"abstract":"Surface discharge is a typical fault type in electric power equipment. High temperature in long-term operation can easily lead to ageing of materials, resulting in changes in surface characteristics and surface discharge faults. In this paper, a method of surface discharge identification of silicon rubber (SiR) based on spectral detection technology is presented. The surface discharge spectral characteristics of SiR with different ageing degrees are investigated, and the changes of microphysical and chemical properties and surface insulation properties caused by thermal ageing are analysed. The dynamic evolution of charge during surface discharge is simulated. The experimental results show that the spectral intensity of the surface discharge of the SiR material is mainly concentrated at 350, 600 and 750–900 nm bands. The spectral intensity reaches the maximum value when the ageing time is 168 h. With the intensification of ageing, no new characteristic peaks generate in the discharge spectrum, but the proportion of the same characteristic peaks to the overall wavelength is different. The type of discharge material and ageing state are determined by the characteristic light intensity ratio Ib. The evolutionary mechanism of the discharge spectrum is revealed by the variation of flashover voltage, trap charge density, resistivity and other parameters. The simulation results show that the increase of electron density will lead to more intense electron collision, which will release more photons, resulting in enhanced spectral intensity. This work can provide a reference for the detection of surface discharge and the evaluation of ageing state of the equipment inside the high voltage box.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"192-200"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145140566","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

Dissolved Gas Generation Characteristics of Dielectric Liquids Under Partial Discharges and Breakdown Sparks 部分放电和击穿火花作用下介质液体溶解气体产生特性

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-11-08 DOI: 10.1049/hve2.70099

Gechen Bian, Qiang Liu, Paul Jarman, Pascal Mavrommatis

{"title":"Dissolved Gas Generation Characteristics of Dielectric Liquids Under Partial Discharges and Breakdown Sparks","authors":"Gechen Bian, Qiang Liu, Paul Jarman, Pascal Mavrommatis","doi":"10.1049/hve2.70099","DOIUrl":"10.1049/hve2.70099","url":null,"abstract":"With the growing interest in monitoring and diagnostic techniques for assessing transformer condition, dissolved gas analysis (DGA) stands out as a crucial diagnostic tool to detect electrical and thermal faults in liquid-immersed transformers. Laboratory-based DGA studies have primarily focused on detecting gas concentrations and patterns under simulated fault conditions in different types of insulating liquids. To understand the significance of dissolved gas values it is invaluable to establish the quantitative relationship between the gas generation amount and the electrical energy associated with the fault. This study aims to systematically investigate the correlation between gas generation characteristics and the electrical energy associated with either partial discharges (PD) or breakdown sparks (BD) in a mineral oil (MO) and a synthetic ester (SE). An in-house designed experimental setup was developed, and various influencing factors were explored. The results of DGA-PD tests indicated that PD magnitude influences the fault gas volume per unit energy (GVPUE, μL/J) generated in both liquids. The GVPUE in MO was found to be higher than that in SE for the same PD magnitude. The results of DGA-BD tests showed that larger breakdown gap distances lead to a higher GVPUE and a lower H2/C2H2 gas ratio. The findings bring new insights on fault gas generation mechanisms in transformer liquids.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"233-242"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462392","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

Effect of Aggregation Structure on DC Electrical Performance of Thermo-Oxidatively Aged Crosslinked Polyethylene Insulation 聚类结构对热氧化老化交联聚乙烯绝缘直流电性能的影响

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-02-11 DOI: 10.1049/hve2.70158

Bingrong Huang, Yifan Wu, Shihang Wang, Shengtao Li, Yuanwei Zhu, Weiwang Wang

{"title":"Effect of Aggregation Structure on DC Electrical Performance of Thermo-Oxidatively Aged Crosslinked Polyethylene Insulation","authors":"Bingrong Huang, Yifan Wu, Shihang Wang, Shengtao Li, Yuanwei Zhu, Weiwang Wang","doi":"10.1049/hve2.70158","DOIUrl":"10.1049/hve2.70158","url":null,"abstract":"Thermal ageing is an important factor leading to the deterioration of crosslinked polyethylene (XLPE) cable insulation. In this paper, XLPE insulating material was prepared in the laboratory and treated by thermal ageing at 130°C for durations of up to 40 days. Space charge and DC electrical breakdown characteristics were investigated to evaluate the DC electrical performance of differently aged XLPE. Furthermore, to gain deeper insight into the underlying mechanisms, the charge trap characteristics along with the chemical and crystalline structures were examined. The results show that, during the effective protection period of the antioxidant, the XLPE samples exhibit enhanced DC electrical performance, specifically higher DC breakdown strength and reduced space charge accumulation. This improvement is attributed to the evolution of the microstructure. In the initial ageing stage, the degree of crystallisation increases, whereas physicochemical defects are reduced, accompanied by a more concentrated trap energy distribution. As a result, charge injection and migration are effectively inhibited. In the later stage of ageing, the antioxidant efficacy weakens and molecular chain scission occurs, resulting in the disappearance of spherulitic structure and deterioration of electrical properties. These findings are essential for the understanding of the XLPE cable service performance and the enhancement of the XLPE DC electrical performance.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"49-59"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146161103","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

Transient Overvoltages in Onshore HVDC Cable Joints: Surge Reflections and the Influence of Grounding Configurations 陆上高压直流电缆接头中的瞬态过电压：浪涌反射和接地配置的影响

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 DOI: 10.1049/hve2.70170

Tanumay Karmokar, Roland Dongping Zhang, Mohamad Ghaffarian Niasar, Marjan Popov

{"title":"Transient Overvoltages in Onshore HVDC Cable Joints: Surge Reflections and the Influence of Grounding Configurations","authors":"Tanumay Karmokar, Roland Dongping Zhang, Mohamad Ghaffarian Niasar, Marjan Popov","doi":"10.1049/hve2.70170","DOIUrl":"10.1049/hve2.70170","url":null,"abstract":"This study examines transient overvoltage phenomena in 525 kV high-voltage direct current (HVDC) onshore cable systems, with particular emphasis on the influence of grounding configurations in two joint types: straight-through and screen-separated. Transient overvoltages arising from wave propagation and reflections are analysed, highlighting the impact of joint types, bonding cable configurations (coaxial vs. noncoaxial) and bonding cable length on the resulting overvoltage magnitudes. The necessity of modelling screen-to-earth representations of sectionalised cables at grounded joint locations in the vicinity of faults is emphasised, whereas simplified representations of ungrounded and grounded straight-through joints are identified as sufficient for system-level simulations. To address the computational challenges of detailed electromagnetic transient simulations, a stand-alone simplified circuit is proposed to analyse grounded joint transients and to mitigate errors caused by insufficient time-step resolution. The results provide practical insights for insulation coordination, supporting the reliable integration of HVDC technology into long-distance cable-based transmission networks while enhancing system resilience.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"83-99"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319539","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 : 2026-02-28

引用次数: 0

Study on the Impact of Contamination Containing High Proportions of Metals on the AC Flashover Characteristics of Insulators 高含金属污染对绝缘子交流闪络特性影响的研究

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2025-10-18 DOI: 10.1049/hve2.70101

Zhijin Zhang, Dong Zeng, Bingbing Wang, Xingliang Jiang, Jianlin Hu, Qin Hu

{"title":"Study on the Impact of Contamination Containing High Proportions of Metals on the AC Flashover Characteristics of Insulators","authors":"Zhijin Zhang, Dong Zeng, Bingbing Wang, Xingliang Jiang, Jianlin Hu, Qin Hu","doi":"10.1049/hve2.70101","DOIUrl":"10.1049/hve2.70101","url":null,"abstract":"In heavy metal industrial areas, the issue of insulation flashover caused by metal contamination on the external insulation of transmission lines has become increasingly prominent. This paper investigates the U160B/155 porcelain insulator, examining how iron, copper and zinc metal contaminations affect its AC flashover characteristics. Furthermore, combining with leakage current, the flashover mechanism of the insulators under the influence of metal particles is analysed. The research results indicate that as the metal content increases, the insulator's flashover gradient (EL) decreases by up to 2.3%–17.2%. Different metal compositions exhibit consistent mechanisms, similarly impacting insulator's dielectric strength with copper showing slightly weaker effect. And then, based on the mechanism of metal particles' influence on the insulator's AC flashover, a formula for calculating EL is proposed and the calculated results are basically consistent with the experimental conditions. Finally, different metal compositions have similar effects on the leakage current, with an increase in metal content leading to an increase in the critical leakage current, which gradually tends to saturation. The research findings of this paper can provide references for AC flashover prediction, assessment and prevention of external insulation in areas with metal contaminants in pollution sources.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"264-273"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314743","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

Technical Progress, Challenges and Prospects of HVDC Cable Accessories: A Review With Chinese Practice Insights 高压直流电缆附件的技术进步、挑战与展望——基于中国实践的回顾

IF 4.9 2区工程技术

High Voltage Pub Date : 2026-02-28 Epub Date: 2026-02-18 DOI: 10.1049/hve2.70168

Zongxi Liu, Benhong Ouyang, Kaiwen Huang, Yuli Wang, Jiankang Zhao, Peng Zhao

{"title":"Technical Progress, Challenges and Prospects of HVDC Cable Accessories: A Review With Chinese Practice Insights","authors":"Zongxi Liu, Benhong Ouyang, Kaiwen Huang, Yuli Wang, Jiankang Zhao, Peng Zhao","doi":"10.1049/hve2.70168","DOIUrl":"10.1049/hve2.70168","url":null,"abstract":"With the development of deep-sea wind power and large-scale onshore clean energy, the global demand for higher voltage level DC cable power transmission technology has become increasingly urgent. This paper systematically reviews the technical advancements in high voltage direct current (HVDC) cable accessories, addressing design challenges of terminations and joints, insulation material performance, manufacturing processes for large-scale components, standard frameworks and long-term reliability. The core challenges in HVDC accessories are identified as conductivity matching of insulating materials, interface electric field regulation and multi-field coupling reliability, requiring synergistic optimisation of electrical, thermal and mechanical behaviours through the modification of rubber materials, interfacial compatibility and multi-physics field modelling. Silicon rubber and ethylene propylene diene monomer made in China have achieved electrical properties comparable to international standards, yet breakthroughs in tear resistance, process consistency and environmental sustainability remain critical. The injection moulding defect control and uniform moulding process of large rubber and epoxy parts demand further improvement. The standard system in China needs to be strengthened in terms of systematic certification and long-term reliability evaluation. Future research should prioritise eco-friendly material development, intelligent monitoring technologies and multi-field coupling ageing life prediction to enhance the reliability of HVDC cable systems under extreme voltages and complex operational scenarios.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 1","pages":"1-24"},"PeriodicalIF":4.9,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146230925","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