High Voltage最新文献

{"title":"Non-linear electrical conductivity of compositionally gradient structured zinc oxide/ethylene propylene diene monomer composites for cable accessory application","authors":"Tiandong Zhang,&nbsp;Huiduo Xu,&nbsp;Gang Liu,&nbsp;Chao Yin,&nbsp;Changhai Zhang,&nbsp;Yue Zhang,&nbsp;Yongquan Zhang,&nbsp;Qingguo Chi","doi":"10.1049/hve2.12502","DOIUrl":"https://doi.org/10.1049/hve2.12502","url":null,"abstract":"<p>In this study, the functional gradient materials (FGMs) were the first attempt to homogenise the electric field distribution in the cable accessory, where zinc oxide particles (ZnO_k) were filled into ethylene propylene diene monomer with the compositionally gradient distribution using laminating and hot-pressing methods. The constructed FGMs with significantly improved non-linear conductivity can avoid the electric field distortion in cable accessories. The results show that the configuration of compositionally gradient structured fillers can significantly improve the electrical conductivity of FGMs compared to the homogeneous distribution. Additionally, compositionally gradient structures of ZnO_k fillers can also improve the thermal conductivity of FGM composites, which facilitates the heat dissipation of dielectric and reduces the probability of electrothermal coupling breakdown. The mechanical properties of the composites are deeply affected by the filler's content and configuration, both improved tear elongation and tensile strength can be achieved at an optimal content and gradient structure of ZnO_k fillers. Finally, the simulation analysis results show that FGM composites can homogenise the electric field more efficiently in comparison with homogeneous composites. This work demonstrates that compositionally gradient structures can improve the utilisation of functional fillers and develop the FGM composites for high-voltage direct current cable accessory applications.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"746-759"},"PeriodicalIF":4.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12502","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519840","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}

{"title":"Finite element joint simulation model applied to fast mechanical switching of controlled resonance combination circuit breakers","authors":"Puyi Cui,&nbsp;Guoli Li,&nbsp;Zehui Sun,&nbsp;Jiazi Xu,&nbsp;Guoyong Zhang,&nbsp;Zhong Chen,&nbsp;Weiping Guan","doi":"10.1049/hve2.70012","DOIUrl":"https://doi.org/10.1049/hve2.70012","url":null,"abstract":"<p>Fast mechanical switches (FMSs) are critical components of DC circuit breakers (DCCBs), which require the switch action time to break to a sufficient distance within 3 ms in the DC line breaking scenario, while ensuring a long service life. The breaking mechanism significantly affects the current interruption capability of DCCBs. The operation of the repulsion mechanism, along with the morphology of the arc and its transformation within the interrupter chamber, collectively influence the breaking performance of the FMSs. This paper presents a comprehensive analysis of the FMSs, which serves as the pivotal component of controlled resonance combination circuit breakers (CRCBs). This study establishes a multi physics coupling simulation analysis method based on the equivalent circuit of repulsion mechanism discharge, combined with electromagnetic and solid mechanics fields. By constructing a full cycle magnetohydrodynamic particle arc (MHP) model and using a combined simulation of Finite Element joint model (FEJM), the evolution law of arc characteristics during the superimposed current interruption process was systematically explored. The focus was on analysing the physical process of the zero zone of the superimposed arc, the multi physics field coupling relationship of the arc, and the interaction mechanism with external characteristic parameters. Further combining with optimisation design methods, the effectiveness of the model was verified through experiments, FEJM provides comprehensive technical support for effectively reflecting the stress issues of core components during the breaking process of FMS and can provide accurate theoretical references for the optimisation design of mechanical motion components in FMS. It also accurately represents the arc extinguishing process during the breaking of FMS and provides a convenient method for the selection and design of circuit parameters for the entire circuit breaker.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"419-435"},"PeriodicalIF":4.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892994","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}

{"title":"Investigation of the dynamic charge transport behaviours under electron beam irradiation of advanced insulation materials for aerospace applications","authors":"Guangyu Sun,&nbsp;Xiong Yang,&nbsp;Wentong An,&nbsp;Kun Huang,&nbsp;Xiaogang Qin,&nbsp;Baipeng Song,&nbsp;Guanjun Zhang","doi":"10.1049/hve2.70020","DOIUrl":"https://doi.org/10.1049/hve2.70020","url":null,"abstract":"<p>Aerospace dielectric components on spacecrafts are frequently exposed to surface charging. Here the dynamic charging behaviours of advanced aerospace dielectrics under electron beam irradiation are investigated. Combined measurement of dielectric secondary emission yield (SEY) and trap distribution provides input parameters of a drift-diffusion transport model reproducing the beam-irradiated dielectric charging processes. The model reveals the spatial–temporal evolutions of the current, charge density, and electric field distribution. The model-predicted sample current, SEY and surface potential, in a surface layer of 1 μm and with incident electron energy range of 10–30 keV, are compared with the experiments, showing qualitative agreement. The effects of beam energy and current, dielectric material, and sample thickness on the charging processes are explored. Relation between the beam energy and final surface potential is determined, and the beam current is found to only affect the charging speed. Dielectric parameters including the mass density, permittivity, surface resistivity, trap state distribution, electron affinity, together influence the charging speed and final charged state.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"305-315"},"PeriodicalIF":4.4,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892984","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}

{"title":"Repair of defects in buffer layer of high voltage cable based on additive liquid silicone rubber material","authors":"Wenqing Zhou,&nbsp;Qihao Xiao,&nbsp;Yanyang Yin,&nbsp;Xiaodong Liu,&nbsp;Licheng Li,&nbsp;Gang Liu","doi":"10.1049/hve2.70021","DOIUrl":"https://doi.org/10.1049/hve2.70021","url":null,"abstract":"<p>In recent years, the issue of defects in the buffer layers of high-voltage cables has garnered significant attention due to their widespread occurrence and the substantial potential damages they pose. Although progress has been made in understanding the mechanisms behind these defects and in developing detection methods, effective repair solutions remain limited. This study addresses this challenge by proposing a novel repair material: a two-component, additive liquid silicone rubber-based compound that utilises vinyl silicone oil as its base. The electrical, thermal, and mechanical properties of the cured silicone-based repair fluid are thoroughly analysed. To evaluate its effectiveness, an experimental platform was constructed using a 17-m-long, 110 kV retired cable with known buffer layer defects. A specialised injection process was developed to facilitate the application of the repair fluid. The thermal characteristics, buffer layer voltage distribution, and partial discharge behaviour of the defective cable were analysed both before and after the repair. The results indicate that following the repair, the cable's heat dissipation capacity under full load increased by 6.25%. Additionally, the buffer layer voltage at the rated voltage (<i>U</i>₀) decreased from 1.97 to 0.34 V, representing an 82.74% reduction. Notably, no partial discharge signals exceeding background noise were detected post-repair. This study demonstrates the effectiveness of the addition-cure liquid silicone rubber-based semi-conductive material in repairing cable buffer layer defects and provides valuable experimental support for its practical application in engineering.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"316-324"},"PeriodicalIF":4.4,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892792","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}

{"title":"Ice thickness/density measurement method based on its capacitance effect","authors":"Lina Dong,&nbsp;Zhijin Zhang,&nbsp;Hualong Zheng,&nbsp;Guolin Yang,&nbsp;Jianlin Hu,&nbsp;Lichun Shu,&nbsp;Xingliang Jiang","doi":"10.1049/hve2.70016","DOIUrl":"https://doi.org/10.1049/hve2.70016","url":null,"abstract":"<p>In winter, the ice-covered conductors pose a significant influence to the safe operation of power grids. Despite extensive research in this area, measuring on-site ice accurately remains a major challenge. Obtaining accurate data of ice thickness and density is the basis of ice disaster prevention and emergency treatment of power grids. The current measurement methods based on power line's tension and insulator string's inclination or video image are commonly used at power grids, which cannot accurately monitor the actual ice thickness, and also cannot measure ice density. Based on long-term natural icing field observations and extensive simulation tests conducted in the artificial climate chamber, this paper puts forward a new method for monitoring the ice thickness and density using the capacitance effect of ice layers due to their dielectric characteristics. Theoretical analysis and testing results demonstrate that the capacitance of an ice layer steadily increases with both increasing thickness and density, which can be used for accurate determination of changes of both the parameters mentioned above. Therefore, the proposed method based on the capacitance effect of ice layer on power lines can be used to monitor the ice thickness and density of power lines accurately.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"400-410"},"PeriodicalIF":4.4,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892791","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}

{"title":"Research on digital twin modelling technique for ±800 kV converter transformers scene based on hybrid attention mechanism and multiresolution hash encoding","authors":"Hao Luo,&nbsp;Li Cheng,&nbsp;Pengyong Yi,&nbsp;Jiuyi Wang,&nbsp;Xuetong Zhao,&nbsp;Lijun Yang,&nbsp;Ruijin Liao","doi":"10.1049/hve2.70019","DOIUrl":"https://doi.org/10.1049/hve2.70019","url":null,"abstract":"<p>Digital twin (DT) modelling is a prerequisite for the successful application of DT technology in the power industry. However, traditional scene modelling methods are costly, time-consuming, focus on overall features and lack real-time updates, hindering the interaction between DT models and physical power equipment scenes. Therefore, a scene DT modelling technique focusing on local features in risk areas and real-time updates is urgently needed. Herein, real-time modelling of the ±800 kV converter transformer is achieved by improving the neural radiation field based on a hybrid attention mechanism and multiresolution hash encoding. Compared to traditional methods, modelling time is reduced from hours to 1 min without professional equipment or manual intervention. The model quality is more concerned with local features of risk areas in transformers while ensuring the overall scene, and the accuracy is improved by about 6%, realising the real-time modelling of transformers and the DT of scenes.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"294-304"},"PeriodicalIF":4.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892990","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}

{"title":"Fabrication of insulation spacers for ultra-high voltage gas-insulated switchgear using eco-friendly bio-based epoxy composite material characterisation evaluation","authors":"Chanyong Lee,&nbsp;Yohan Noh,&nbsp;Hangoo Cho,&nbsp;Jaehyeong Lee","doi":"10.1049/hve2.70000","DOIUrl":"https://doi.org/10.1049/hve2.70000","url":null,"abstract":"<p>In the electric power equipment industry, various insulating materials and accessories are manufactured using petroleum-based epoxy resins. However, petrochemical resources are gradually becoming limited. In addition, the global surge in plastic usage has consistently raised concerns regarding greenhouse gas emissions, leading to worsening global warming. Therefore, to facilitate eco-friendly policies, industrialising epoxy systems applicable to high-pressure components using bio-based epoxy composites is essential. The results of the characterisation conducted in this research regarding bio-content were confirmed through thermogravimetric analysis and differential scanning calorimetry, which showed that as the bio-content increased, the thermal stability improved. Considering the operating temperature of 105°C for the insulation spacer, structurally, no issues would be encountered if the spacer was manufactured with a bio-content of 20% (bio 20%). Subsequent tensile and flexural strength measurements revealed mechanical properties equivalent to or better than those of their petroleum-based counterparts. The impact strength tended to decrease with increasing bio-content. Analysing the dielectric properties confirmed that the epoxy composite containing 20% biomaterial is suitable for manufacturing insulation spacers. Subsequently, a series of tests conducted after spacer fabrication confirmed the absence of internal metals and bubbles with no external discolouration or cracks observed.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"451-457"},"PeriodicalIF":4.4,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892970","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}

{"title":"A novel transformer health state direct prediction method based on knowledge and data fusion-driven model","authors":"Peng Zhang,&nbsp;Guoliang Zhang,&nbsp;Fei Zhou,&nbsp;Xiaoyu Fan,&nbsp;Yi Zhang,&nbsp;Zexu Du","doi":"10.1049/hve2.12523","DOIUrl":"https://doi.org/10.1049/hve2.12523","url":null,"abstract":"<p>Predicting the future health state of a transformer can offer early warning of latent defects and faults within the transformer, thereby facilitating the formulation of power outage maintenance plans and power dispatch strategies. However, existing prediction methods based on the structure of ‘splicing prediction and diagnosis method’ suffer from limitations such as inability to achieve global optimality, error accumulation, and low prediction accuracy. To fill this gap, a novel direct prediction method of a transformer state based on knowledge and data fusion-driven model (K&amp;DFDM) is proposed in this paper. Firstly, a state quantity data space is constructed to comprehensively reflect the changes in the health state of the transformer over time, encompassing online monitoring, offline testing, evaluation results, and actual operation data. After that, correlation knowledge between state quantities, fault diagnosis mechanism knowledge, current diagnosis experience knowledge, and uncertain fuzzy knowledge are extracted separately. The actual fault mechanism, existing expert experience, and other knowledge in the diagnosis process are quantified. Then, the attention model is subsequently optimised, leveraging quantitative knowledge to effectively constrain and guide the data prediction process. Incorporating fault diagnosis mechanism knowledge into the data prediction model enables the achievement of global optimisation in both diagnosis and prediction. The integration of traditional expert experience knowledge and the correlation knowledge between state quantities serves as constraints during the process of attaining the global optimum. The verification results, comprising 327 cases, demonstrate that K&amp;DFDM effectively addresses the issue of error superposition encountered by existing state prediction methods, leading to a direct state prediction accuracy of 96.33%.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"710-725"},"PeriodicalIF":4.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12523","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519835","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}

{"title":"Enhanced high-temperature energy storage density of polypropylene-based materials by micro-crosslinked structure design with N-type organic semiconductor","authors":"Hongbo Liu,&nbsp;Lu Cheng,&nbsp;Zhiyuan Li,&nbsp;Jiakai Zeng,&nbsp;Wenfeng Liu,&nbsp;Shengtao Li","doi":"10.1049/hve2.12522","DOIUrl":"https://doi.org/10.1049/hve2.12522","url":null,"abstract":"<p>In this study, the authors proposed a promising structure design, the micro-crosslinked polypropylene (PP), to enhance the high-temperature energy storage density. With the grafting of 1,6,7,12-tetrachlorinated perylene-<i>N</i>-2-aminoethyl acrylate-<i>N</i>′-dodecylamine-3,4,9,10-tetracarboxylic bisimide (PTCDA) onto PP molecules, the obtained PP-g-PTCDA achieved a superior energy storage density of 2.34 J/cm³ at 120°C with the discharge efficiency above 90%, which was 585% higher than that of neat PP. The great enhancement, on the one hand, originated from the micro-crosslinked structure, since the restricted molecular motion can lead to the suppression of electrons' hopping across the molecular chains. On the other hand, deep traps were also introduced in PP-g-PTCDA, which restricted the electrons' hopping along the molecular chains simultaneously. This work provided an orientation to enhance the energy storage density at an elevated temperature of 120°C.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 3","pages":"738-745"},"PeriodicalIF":4.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12522","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519917","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}

{"title":"Incident energy determination of three-phase arc flash using magnetohydrodynamics simulations: A case study for horizontal electrodes in open-air configurations","authors":"Pedro O. Bacin,&nbsp;Mateus F. Fava,&nbsp;Rodolfo P. Londero,&nbsp;Tiago B. Marchesan,&nbsp;Vitor C. Bender,&nbsp;Rafael C. Beltrame,&nbsp;Daniel P. Bernardon,&nbsp;Carlos Eduardo G. Falcão,&nbsp;Carlos A. Simões,&nbsp;Gilnei José G. Santos","doi":"10.1049/hve2.70009","DOIUrl":"https://doi.org/10.1049/hve2.70009","url":null,"abstract":"<p>Arc flashes pose significant hazards to personnel working with energised power lines due to their high thermal risk, quantified by incident energy (IE) in joules or calories per area. Accurate estimation of IE is crucial for ensuring safety. The most widely employed method for estimating IE from an arc flash is outlined in IEEE Std 1584-2018, which applies exclusively to three-phase AC arc flashes. However, limited research has explored alternative methods due to the complexities, costs, and preparation involved. Numerical simulations offer a viable alternative for studying arc flashes. This paper introduces a multiphysics simulation approach for determining IE by modelling three-phase AC arc flashes using the magnetohydrodynamics (MHD) theory. This study exclusively investigates horizontal electrodes in open-air (HOA) configuration due to the specific characteristics of the local power system configuration, which predominantly features overhead power lines, and the available test setup in the laboratory. The IE derived from simulations is compared with measurements from an arc flash laboratory based on IEEE Std 1584-2018 and with the IE calculated by the standard itself. The results indicate a significant alignment between this innovative approach and other methods for estimating IE for three-phase arc flashes.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"436-450"},"PeriodicalIF":4.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892986","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}