High Voltage最新文献

Guest Editorial: Special issue on real-time simulation and validation of modular multilevel converter-based high-voltage direct current systems

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-02-14 DOI: 10.1049/hve2.70004

Chongru Liu, Jun Liang, Zhanqing Yu

{"title":"Guest Editorial: Special issue on real-time simulation and validation of modular multilevel converter-based high-voltage direct current systems","authors":"Chongru Liu, Jun Liang, Zhanqing Yu","doi":"10.1049/hve2.70004","DOIUrl":"https://doi.org/10.1049/hve2.70004","url":null,"abstract":"Modular multilevel converter-based high-voltage direct current (MMC-HVDC) technology is advancing rapidly in modern power systems, striving for higher voltage levels and greater power transmission capacity. Real-time simulation has become an essential tool for the design, analysis, and validation of MMC-HVDC systems. However, the complexity of MMC-HVDC with its numerous fast-switching power electronic components presents significant challenges in accurately capturing dynamic responses. Advanced simulation techniques are indispensable for modelling the intricate behaviours of converters, control systems, and protection mechanisms, which are critical for the reliable operation of MMC-HVDC systems.We are honoured to have been invited by High Voltage to serve as guest editors for this special issue, which highlights key achievements in the field of real-time simulation and validation of MMC-HVDC systems. This issue comprises both invited and submitted papers. After rigorous peer review, four outstanding articles were selected showcasing cutting-edge research in real-time simulation technologies, advanced computational methods, and innovative platforms for emerging new power systems.We extend our heartfelt gratitude to all contributing authors for their exceptional work and to the reviewers for their meticulous and insightful feedback, which have been instrumental in ensuring the quality of this special issue. We also sincerely thank the editorial team of High Voltage for their support and dedication throughout the preparation process.We hope this special issue serves as an inspiring and educational resource, offering valuable insights and advancing the field of MMC-HVDC systems. Happy reading!","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"1-2"},"PeriodicalIF":4.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536023","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

Development of a field-programmable gate array-based real-time generic solver for power electronics circuits with arbitrary configurations 为具有任意配置的电力电子电路开发基于现场可编程门阵列的实时通用求解器

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-02-12 DOI: 10.1049/hve2.70001

Yuan Chen, Jiadai Liu, Hui Ding, Yi Zhang

引用次数: 0

Comparative studies of C4F7N-based gas mixtures as the eco-friendly alternative to SF6 for interrupting applications

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-02-12 DOI: 10.1049/hve2.70003

Wen Wang, Xianglian Yan, Hao Wang, Keli Gao

{"title":"Comparative studies of C4F7N-based gas mixtures as the eco-friendly alternative to SF6 for interrupting applications","authors":"Wen Wang, Xianglian Yan, Hao Wang, Keli Gao","doi":"10.1049/hve2.70003","DOIUrl":"https://doi.org/10.1049/hve2.70003","url":null,"abstract":"To comprehensively evaluate the feasibility of using C4F7N-based gas mixture as arc extinguishing medium, a comparative study is performed on the variations of the multi-physical fields, gas flow environment and decomposition characteristics of the gas mixtures. A modified theoretical basis of the arc model developed for the C4F7N-based gas mixture is presented in the work with particular emphasis on the non-recombination features of C4F7N. This work also experimentally studies the electrical characteristics of the gas medium and the monitored parameters are also used to calibrate the arc model. The amount change of the seven dominant decomposing by-products is analysed as well. The results present that the C4F7N/CO2/O2 ternary gas mixture exhibits a more promising interrupting performance. Increasing the O2 concentration from 5% to 10% has less effects on the arc characteristics, but it could suppress the formation of CO. The arc behaviour of C4F7N/CO2/O2 gas mixture is also improved with increasing the velocity of the moving components. The findings provide important insights into the potential of C4F7N-based gas mixtures as one of the sustainable and effective solutions for high-voltage interrupting applications.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"228-242"},"PeriodicalIF":4.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533999","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

Rapid system prototype-based physical simulation platforms for power systems with high penetration of inverter-based resources

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-02-07 DOI: 10.1049/hve2.12520

Wei Yao, Yimin Ruan, Yuying Chen, Hongyu Zhou, Jinyu Wen, Meng Zhou, Wenping Zuo

{"title":"Rapid system prototype-based physical simulation platforms for power systems with high penetration of inverter-based resources","authors":"Wei Yao, Yimin Ruan, Yuying Chen, Hongyu Zhou, Jinyu Wen, Meng Zhou, Wenping Zuo","doi":"10.1049/hve2.12520","DOIUrl":"https://doi.org/10.1049/hve2.12520","url":null,"abstract":"The traditional power system dominated by synchronous generators is gradually evolving into a power system with high penetration of inverter-based resources (IBRs). In this paper, the new characteristics that arise from the high penetration of IBRs in power systems are reviewed. In light of these characteristics, current simulation technologies are inadequate and new requirements for the simulation platforms have been proposed. In response, this paper introduces the rapid system prototype (RSP)-based physical simulation platforms, which include the digital simulator, the rapid prototype controller, and the rapid object-controlled prototype. RSP addresses the time-consuming and labour-intensive shortcomings of traditional simulation techniques and meets the rapid evolution needs of the power system with high penetration of IBRs. Compared with existing simulation platforms, RSP is a more suitable platform for the physical simulation of power systems with high penetration of IBRs. Using the modular multilevel converter-based high-voltage direct current as a case study, a novel physical simulation platform for power systems based on RSP is constructed. Experimental results demonstrate that the RSP concept and technology can establish an enterprise-level simulation environment and engineering practice platform. Moreover, it can provide realistic and flexible simulations of various characteristics of power systems with high penetration of IBRs.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"3-16"},"PeriodicalIF":4.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12520","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533409","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

Electrohydraulic effect of microsecond pulsed discharge in transformer oils

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-01-21 DOI: 10.1049/hve2.12519

Hang Wang, Cheng Zhang, Zhuofei Wang, Shuai Zhang, Kaihang Guo, Tao Shao

{"title":"Electrohydraulic effect of microsecond pulsed discharge in transformer oils","authors":"Hang Wang, Cheng Zhang, Zhuofei Wang, Shuai Zhang, Kaihang Guo, Tao Shao","doi":"10.1049/hve2.12519","DOIUrl":"https://doi.org/10.1049/hve2.12519","url":null,"abstract":"The physical process of microsecond pulsed discharge in transformer oil is the foundation for studying the initial mechanics of faults in ultra-high voltage transformers. However, the microsecond-scale electrohydraulic effect in transformer oil has not been investigated yet. In this paper, the shock wave and bubble generated by microsecond pulsed discharge in transformer oil between needle-needle electrodes are studied using a Schlieren system with a high-speed camera. The results show that the discharge channel in the 0.1 mm oil gap forms in 9.50 µs when the streamer and the first shock wave are observed. The bubble between electrodes expands in the subsequent 218.50 µs. Then, the bubble collapses when the second shock wave is observed. The velocities of the first and the second shock wave are 1388.16 and 1465.46 m/s, respectively. With the gap distance increase, all the breakdown voltage, the discharge energy, and the ratio of the mechanical energy to total energy increase, the breakdown current, the acceleration of the container wall, and the velocity of the shock wave decrease. It can be concluded that the first shock wave is generated by the streamer of microsecond pulsed discharge and the second shock wave is induced by the rapid density change due to the bubble collapsing.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"137-145"},"PeriodicalIF":4.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12519","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536080","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

Preparation of magnetic-oriented electronic packaging composite materials with improved thermal conductivity and insulating properties by filling magnetic BN@Fe3O4 core-shell particles into epoxy

IF 4.4 2区工程技术

High Voltage Pub Date : 2025-01-19 DOI: 10.1049/hve2.12466

Zeyu You, Ling Weng, Lizhu Guan, Xiaorui Zhang, Zijian Wu, Hao Chen, Wei Zhao

{"title":"Preparation of magnetic-oriented electronic packaging composite materials with improved thermal conductivity and insulating properties by filling magnetic BN@Fe3O4 core-shell particles into epoxy","authors":"Zeyu You, Ling Weng, Lizhu Guan, Xiaorui Zhang, Zijian Wu, Hao Chen, Wei Zhao","doi":"10.1049/hve2.12466","DOIUrl":"https://doi.org/10.1049/hve2.12466","url":null,"abstract":"Epoxy resin (EP), as a resin material with excellent insulation performance, has been widely applied in fields such as electronics, coatings, ships etc. However, epoxy resins generally have poor thermal conductivity, which limits their application in the field of new generation of electronic packaging. To address the key issues mentioned above, the BN@Fe3O4 particles with positive out-of-plane thermal conductivity were successfully prepared in this study, having a core-shell structure with rough surfaces as well. As a thermal conductive powder, the disadvantage of hexagonal boron nitride being easily agglomerated in resin has been improved. By applying an external magnetic field, three-dimensional thermal conduction pathways were constructed in the matrix. The physical and chemical properties of the BN@Fe3O4 powder and its composite materials were analysed and tested. The experiment indicates that the thermal conductive magnetic powder BN@Fe3O4 had been successfully prepared. When the filling amount of BN@Fe3O4 reached 27.5 vol%, the out-of-plane thermal conductivity of the composite material was 1.758 W m−1 K−1, which was 982.12% that of pure EP. At this point, the mechanical behaviour and insulation performance of EP composite materials can be effectively guaranteed at the same order of magnitude as pure EP performance.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"219-227"},"PeriodicalIF":4.4,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12466","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536018","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

Stress analysis and structural optimisation of insulating rods under dynamic and static loads 动态和静态载荷下绝缘棒的应力分析和结构优化

IF 4.4 2区工程技术

High Voltage Pub Date : 2024-12-30 DOI: 10.1049/hve2.12512

Haifeng Jin, Lijun Jin

{"title":"Stress analysis and structural optimisation of insulating rods under dynamic and static loads","authors":"Haifeng Jin, Lijun Jin","doi":"10.1049/hve2.12512","DOIUrl":"https://doi.org/10.1049/hve2.12512","url":null,"abstract":"This study aims to provide a theoretical basis for the fatigue characteristics and structural optimisation of insulating rods to enhance their reliability and lifespan in practical applications. This paper uses COMSOL to complete the stress analysis of insulating rods under dynamic and static loads based on the finite element method. The correctness of the model is verified based on the elastic-plastic theory. The simulation results show that under the same load, the stress concentration area is more affected by the dynamic load, and the stress concentration position is highly consistent with the fracture position of the rod in the experiment. It verifies the impact on the insulating rods at different speeds and static load stress. Simulation shows that, in cases where the allowable stress is exceeded, as the number of operations increases, the fatigue characteristics will greatly affect the service life of the insulation rod. Finally, the fatigue analysis and structural optimisation of the insulating rod were completed, providing important reference values for the long-term stable operation of ultra-high voltage circuit breakers.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"116-125"},"PeriodicalIF":4.4,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12512","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536085","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

Mechanism and suppression of breaking overvoltage of DC circuit breakers

IF 4.4 2区工程技术

High Voltage Pub Date : 2024-12-28 DOI: 10.1049/hve2.12491

Lu Qu, Zhangqing Yu, Zhizheng Gan, Xin Yan, Cheng Jiang, Yulong Huang, Mingshen Li, Jian Feng

引用次数: 0

Insulator defect detection under extreme weather based on synthetic weather algorithm and improved YOLOv7

IF 4.4 2区工程技术

High Voltage Pub Date : 2024-12-25 DOI: 10.1049/hve2.12513

Yong Yang, Shuai Yang, Chuan Li, Yunxuan Wang, Xiaoqian Pi, Yuxin Lu, Ruohan Wu

{"title":"Insulator defect detection under extreme weather based on synthetic weather algorithm and improved YOLOv7","authors":"Yong Yang, Shuai Yang, Chuan Li, Yunxuan Wang, Xiaoqian Pi, Yuxin Lu, Ruohan Wu","doi":"10.1049/hve2.12513","DOIUrl":"https://doi.org/10.1049/hve2.12513","url":null,"abstract":"Efficient and accurate insulator defect detection is essential for maintaining the safe and stable operation of transmission lines. However, the detection effectiveness is adversely impacted by complex and changeable environmental backgrounds, particularly under extreme weather that elevates accident risks. Therefore, this research proposes a high-precision intelligent strategy based on the synthetic weather algorithm and improved YOLOv7 for detecting insulator defects under extreme weather. The proposed methodology involves augmenting the dataset with synthetic rain, snow, and fog algorithm processing. Additionally, the original dataset undergoes augmentation through affine and colour transformations to improve model's generalisation performance under complex power inspection backgrounds. To achieve higher recognition accuracy in severe weather, an improved YOLOv7 algorithm for insulator defect detection is proposed, integrating focal loss with SIoU loss function and incorporating an optimised decoupled head structure. Experimental results indicate that the synthetic weather algorithm processing significantly improves the insulator defect detection accuracy under extreme weather, increasing the mean average precision by 2.4%. Furthermore, the authors’ improved YOLOv7 model achieves 91.8% for the mean average precision, outperforming the benchmark model by 2.3%. With a detection speed of 46.5 frames per second, the model meets the requirement of real-time detection of insulators and their defects during power inspection.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"69-77"},"PeriodicalIF":4.4,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12513","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536095","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 nanostructured SiO2 on charge capture performance and electrical ageing life of PP nanocomposites

IF 4.4 2区工程技术

High Voltage Pub Date : 2024-12-23 DOI: 10.1049/hve2.12509

Junguo Gao, Liwei Liu, Guangwei Zhang, Tingtai Lee, Uwe Schachtely, Hitoshi Kobayashi

{"title":"Effect of nanostructured SiO2 on charge capture performance and electrical ageing life of PP nanocomposites","authors":"Junguo Gao, Liwei Liu, Guangwei Zhang, Tingtai Lee, Uwe Schachtely, Hitoshi Kobayashi","doi":"10.1049/hve2.12509","DOIUrl":"https://doi.org/10.1049/hve2.12509","url":null,"abstract":"To guarantee the reliability of high-performance and environmentally friendly novel polypropylene (PP) for use as the primary insulation in cables, an assessment of the electrical ageing life of SiO2/PP composite materials was carried out using a step-stress accelerated ageing test based on the inverse power law. The study involved an analysis of microstructural characteristics and performance testing to investigate the bonding between the SiO2 under different surface treatment methods and matrixes. Furthermore, the impact of SiO2 on charge capture performance in PP insulation was analysed through polarisation–depolarisation current testing. The results show that silica with long alkane chains and amino groups grafted on the surface has good compatibility with PP insulating layers, which can increase the trap energy level of captured electrons and thus reduce the damage of high-energy electrons to the composites. SiO2 increased the life index of the PP insulating layer by 19.95%, which contributed to the improvement of the electrical ageing life of the PP insulating layer.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"10 1","pages":"186-196"},"PeriodicalIF":4.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.12509","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536064","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