High Voltage最新文献

{"title":"Improved Prediction Model for the Corrosion of Aluminium Alloy Conductors: Considering the Influence of Electric Field and Dynamic Boundary","authors":"Hanwei Li, Yuhu Yang, Xiaolai Li, Lin Liu, Fuzhi Wang, Jun Lin, Xingming Bian","doi":"10.1049/hve2.70023","DOIUrl":"https://doi.org/10.1049/hve2.70023","url":null,"abstract":"The corrosion problems of high-voltage power transmission conductors typically occur in environments with electric fields. However, current research mainly focuses on atmospheric corrosion of metals with limited attention to the combined effects of electric fields and atmospheric conditions on metal corrosion. This study established a corrosion prediction model that considers the effects of electric fields and dynamic boundaries. Because of the influence of dynamic boundaries, this model can calculate parameters such as corrosion rate, corrosion depth, corrosion product accumulation and ion concentration for metal samples with and without an external electric field. The model is validated through indoor accelerated corrosion tests under low applied electric fields and by using aluminium alloy conductor samples from high electric field regions of actual ± 500 kV power transmission lines. The results indicate that the corrosion rate of aluminium alloys initially increases and then decreases over time. Additionally, the corrosion rate of aluminium alloys under an applied electric field is higher than that without an electric field during the same period. The mechanism of increased corrosion rate is analysed to be that the presence of the electric field accelerates the cathode reaction rate of the electrode. The corrosion rate of the sample increased by about 78% under a lower electric field (0–20 kV/m) and by about 2.75 times under a higher electric field around 2000 kV/m.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"67 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heat Transfer Characteristics of Novel Resin Impregnated Paper Converter Transformer Valve-Side Bushing With Two-Phase Closed Thermosyphon","authors":"Qingyu Wang, Zishi Yang, Wei Hu, Zuoming Xu, Peng Liu, Zongren Peng","doi":"10.1049/hve2.70011","DOIUrl":"https://doi.org/10.1049/hve2.70011","url":null,"abstract":"Resin impregnated paper (RIP) converter transformer valve-side bushings are the key equipment in converter stations. Local overheating of the RIP core not only reduces the transmission efficiency but also causes insulation failure of converter transformers. In this paper, a new heat dissipation structure is proposed to improve the temperature distribution homogeneity of the bushing using two-phase closed thermosyphon (TPCT). A test model is developed to determine the optimal working fluid inventory. Then, the temperature distribution of a ± 400-kV RIP converter transformer valve-side bushing with an optimised heat dissipation structure is obtained using the coupled three-dimensional electromagnetic-fluid-thermal numerical simulation method considering multiphase flow and phase change processes. The influence of the new structure on the electric field is analysed. The simulation result is verified by the temperature rise test. The results show that two-phase closed thermosyphon can reduce the maximum temperature of the RIP valve-side bushings and significantly improve the temperature distribution homogeneity.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Corrosion Resistance of Copper for C4F7N Based Eco-Friendly Gas-Insulated Equipment","authors":"Song Xiao, Haoran Xia, Zhanyuan Li, Yifan Wang, Ju Tang, Xiaoxing Zhang, Yi Li","doi":"10.1049/hve2.70018","DOIUrl":"https://doi.org/10.1049/hve2.70018","url":null,"abstract":"Perfluoroisobutyronitrile (C₄F₇N) is recognised as the next-generation dielectric medium for eco-friendly gas-insulated equipment (GIE). However, there is gas metal incompatibility in strong electromagnetic environments and environmentally friendly insulating gas atmospheres that endangers the operational safety and service life of GIE. Here, a solvent-induced grain boundary reconstruction method was proposed to prepare corrosion-resistant copper rapidly. Accordingly, the partial discharge-induced gas–metal interaction was simulated and the corrosion resistance properties of copper were evaluated. Additionally, the gas–solid interaction mechanism was investigated and the improvement mechanism of the proposed method on the stability of the gas–solid interface was discussed. Related results provide a reference for the development and application reliability of C₄F₇N-based eco-friendly GIE.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"123 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution network planning considering active response of EVs and DTR of cables and transformers","authors":"Chen Pan,&nbsp;Weijiang Chen,&nbsp;Chengke Zhou,&nbsp;Wenjun Zhou","doi":"10.1049/hve2.70024","DOIUrl":"https://doi.org/10.1049/hve2.70024","url":null,"abstract":"<p>With increasing electricity demand and large-scale stochastic charging of electric vehicles (EVs), distribution networks face inevitable shortage of transfer capability, bringing new challenges to distribution network planning (DNP). Dynamic thermal rating (DTR), which evaluates the equipment rating based on actual meteorological conditions and equipment thermal state, can enhance the equipment transfer capability to meet the increasing load demand. In this paper, we propose a model considering the active response of EVs, and a bi-level DNP model incorporating the DTR of cables and transformers, in the upper level, the Prim algorithm is embedded into the particle swarm optimisation (PSO) algorithm to obtain an initial grid topology; in the lower level, types of cables and transformers as well as the installation of DTR equipment are determined, second-order cone (SOC) relaxation and linearisation of the variables product are then carried out to meet the non-linear constraints of cables and transformers, and the upper and lower models are solved in an iterative manner. Case studies demonstrate that the implementation of DTR effectively enhances the transfer capability of cables and transformers, saving 4.8% investment cost while ensuring 96% uplift of power supply. Besides, with 90% active response rate of EVs, total cost can be further reduced.</p>","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 2","pages":"279-293"},"PeriodicalIF":4.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892856","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}