High Voltage最新文献_第5页

Review of Catenary Icing on High-Speed Railways: Characteristics, Impact and Countermeasures 高速铁路接触网结冰：特点、影响及对策

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-05-11 DOI: 10.1049/hve2.70202

Zheng Li, Guizao Huang, Zhijin Zhang, Yang Liu, Guoqiang Gao, Guolin Yang, Xi Yang, Guangning Wu

{"title":"Review of Catenary Icing on High-Speed Railways: Characteristics, Impact and Countermeasures","authors":"Zheng Li, Guizao Huang, Zhijin Zhang, Yang Liu, Guoqiang Gao, Guolin Yang, Xi Yang, Guangning Wu","doi":"10.1049/hve2.70202","DOIUrl":"https://doi.org/10.1049/hve2.70202","url":null,"abstract":"The pantograph–catenary system (PCS) is the only path for electrified railway trains to acquire energy. Catenary icing during winter is a common natural phenomenon, which usually leads to the deterioration of the current quality and severely affects the operational safety of trains. To address the effects of complex and harsh environments on the PCS, this study reviews and outlooks the problems of catenary icing from the three main aspects: the characteristics of catenary icing, the impacts of icing and the countermeasures. Firstly, the mechanism and characteristics of catenary icing, including the growth mechanisms, evolution patterns and prediction models are investigated. Secondly, the impact of catenary icing on pantograph–catenary current collection and catenary galloping is analysed, and new technologies for real-time icing monitoring are discussed. Lastly, key technologies for catenary anti-icing, de-icing and active matching strategies are introduced. This review addresses the challenges of catenary icing and summarises the current research progress, providing a valuable foundation and practical guidance for advancing future studies in this field.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"601-619"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70202","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358217","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

Analysis of the Anti High-Altitude Electromagnetic Pulse Interference Ability of Relay Protection Devices 继电保护装置抗高空电磁脉冲干扰能力分析

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-06-10 DOI: 10.1049/hve2.70171

Long Jin, Guanglong Zhou, Weidong Zhang, Zexin Zhou, Guosheng Yang, Rongrong Zhan

{"title":"Analysis of the Anti High-Altitude Electromagnetic Pulse Interference Ability of Relay Protection Devices","authors":"Long Jin, Guanglong Zhou, Weidong Zhang, Zexin Zhou, Guosheng Yang, Rongrong Zhan","doi":"10.1049/hve2.70171","DOIUrl":"https://doi.org/10.1049/hve2.70171","url":null,"abstract":"High altitude electromagnetic pulse (HEMP), as a steep slope and high amplitude instantaneous energy shock, has stronger coupling and greater destructive power, which can easily cause the secondary control device of the substation to malfunction. In order to explore the anti-interference ability of the relay protection device to HEMP, a simulation model of electromagnetic radiation based on the actual physical structure was built, and the distribution characteristics of the electric field inside the device were explored under the influence of different excitation factors such as HEMP amplitude, incident angle, and polarisation direction. A radiation and conduction coupling test platform was built between the device and HEMP, and the HEMP threshold of the device malfunctioning due to radiated coupling interference was obtained by comparing the changes in the action characteristics of the device facing the same fault before and after irradiation. The tolerance of the device’s power port under HEMP-conducted interference is verified. The test results show that when the peak irradiation of HEMP reaches 35 kV/m, the device begins to malfunction, and the tripping time in the face of the same fault is significantly prolonged. The operational reliability of relay protection devices is greatly reduced, which affects the safe and stable operation of the power grid.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"738-750"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358076","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

Construction and Application of Online Vibration Frequency Response Analysis Method for Converter Transformer Winding 换流变压器绕组振动频响在线分析方法的构建与应用

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-02-16 DOI: 10.1049/hve2.70145

Shuyu Wu, Fan Zhang, Shengchang Ji

{"title":"Construction and Application of Online Vibration Frequency Response Analysis Method for Converter Transformer Winding","authors":"Shuyu Wu, Fan Zhang, Shengchang Ji","doi":"10.1049/hve2.70145","DOIUrl":"10.1049/hve2.70145","url":null,"abstract":"The harmonic current and vibration of a converter transformer are effective pieces of information for detecting mechanical faults in the winding. In this paper, the ratio of vibration acceleration to the current squared is defined as the vibration frequency response function (VFRF) of the winding, and then, a novel online vibration frequency response analysis (VFRA) method is constructed. A harmonic load platform is built to simulate the real operating environment of the converter transformer, and it is verified by experimental methods that online VFRA is a simpler and more convenient method for winding mechanical condition detection than offline VFRA. The effects of different factors such as current magnitude and harmonic content on the online VFRA are investigated, and the converter transformer winding mechanical condition is detected by combining the VFRF trace with two numerical indices of Lin's concordance coefficient (LCC) and improved comparative standard deviation (CSD). Laboratory experiments demonstrate that online VFRA has high stability and can effectively diagnose winding looseness faults of different degrees. In contrast to the traditional frequency response analysis (FRA) and short-circuit impedance (SCI) methods, online VFRA has higher sensitivity and detection capability, and is a better method for online monitoring of the winding mechanical condition.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"646-655"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146208640","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

Low-Frequency Oscillation Suppression of FDR Time-Domain Diagnostic Waveforms for Cable Defects Based on Splicing Technology 基于拼接技术的电缆缺陷FDR时域诊断波形低频振荡抑制

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-04-01 DOI: 10.1049/hve2.70143

Jingtao Huang, Kai Zhou, Yefei Xu, Zhirong Tang, Zuoxin Tang, Zhongying Liang, Xianjie Rao

{"title":"Low-Frequency Oscillation Suppression of FDR Time-Domain Diagnostic Waveforms for Cable Defects Based on Splicing Technology","authors":"Jingtao Huang, Kai Zhou, Yefei Xu, Zhirong Tang, Zuoxin Tang, Zhongying Liang, Xianjie Rao","doi":"10.1049/hve2.70143","DOIUrl":"10.1049/hve2.70143","url":null,"abstract":"A time domain pulse (TDP) based on the frequency domain reflectometry (FDR) method can be used to diagnose the insulation state of cable defects. However, because of the limitations of the FDR test instrument, the lack of a reflection coefficient spectrum (RCS) in the low-frequency band (LFB) can result in low frequency oscillation in the time domain reflection signal, which may shield the TDP characteristics of cable defects and then affect the diagnosis of the insulation state of the local defect. To improve the diagnostic performance of the insulation status of local defects in power cables, a low-frequency stitching technology based on time domain reflectometry (TDR) and FDR is proposed in this work. First, the influence of the RCS in the LFB on the TDP characteristic is analysed through different lower frequency limits. Then, the principles of the proposed low-frequency stitching technology are introduced in detail, including headend impedance mismatch compensation and the low frequency stitching algorithm. Finally, through simulation and an actual test of two power cables, the effectiveness of the proposed method is verified. The experimental results showed that using the low frequency stitching method could effectively obtain the RCS in the LFB, suppress low-frequency oscillations in the time domain reflection signal and further enhance the TDP characteristics of the cable defects. Thus, the diagnostic performance of the insulation state of the defect could be improved.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"681-691"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147586778","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

Assessing Water Solubility of Ester-Based Oils and Unravelling Their Mechanisms by a Quantitative Model 用定量模型评价酯基油的水溶性及其机理

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-05-22 DOI: 10.1049/hve2.70192

Linyang Dan, Xin Chen, Hao Wen, Feng Tang, Jinlu Sheng, Nan Liu

{"title":"Assessing Water Solubility of Ester-Based Oils and Unravelling Their Mechanisms by a Quantitative Model","authors":"Linyang Dan, Xin Chen, Hao Wen, Feng Tang, Jinlu Sheng, Nan Liu","doi":"10.1049/hve2.70192","DOIUrl":"https://doi.org/10.1049/hve2.70192","url":null,"abstract":"Moisture is a sensitive issue for transformer oils, as it adversely affects the stability of insulation papers and dielectric strength of the oils. However, the lack of a quantitative model makes it challenging to evaluate the water solubility of ester-based oils, which is an undesirable restriction for developing novel ester-based oils. Herein, a quantitative model, which requires only the molecular structure as input, was developed to assess the water solubility. Experimental data revealed that both the molecular structure and temperature are the primary factors influencing the water saturation. Our model successfully reproduced the results with a deviation of < 10.0%. Next, we explored the mechanisms that govern the water saturation, focusing on the contribution of each group within molecular structures. It was found that the ester groups play a key role in determining the water saturation, and their contribution value varies from 180 mg/(kg·atom) (FR3) to 820 mg/(kg·atom) (palm fatty acid ester). This variation arises from the differences in the electrostatic potential (ESP), and a linear relationship between the maximum absolute ESP value and the group contribution value was revealed. Finally, we analysed the vapour–liquid equilibrium, revealing the change of water content in the oils when the operating conditions of transformers vary.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"797-810"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358278","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

Investigating Breathing Dynamics of a 110 kV Oil-Immersed Transformer Using Thermal-Fluid-Structure Interaction Modelling 基于热-流-固耦合模型的110 kV油浸变压器呼吸动力学研究

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-02-11 DOI: 10.1049/hve2.70142

Lujia Wang, Guangyi Chen, Dong Shang, Xiang Zhang, Haitao Yang, Jianwen Zhang

{"title":"Investigating Breathing Dynamics of a 110 kV Oil-Immersed Transformer Using Thermal-Fluid-Structure Interaction Modelling","authors":"Lujia Wang, Guangyi Chen, Dong Shang, Xiang Zhang, Haitao Yang, Jianwen Zhang","doi":"10.1049/hve2.70142","DOIUrl":"10.1049/hve2.70142","url":null,"abstract":"The breathing system of an oil-immersed transformer is of vital importance for maintaining equilibrium between internal and external pressures, with any malfunction potentially disrupting the transformer's stable operation. This study develops a thermal–fluid–structure interaction (TFSI) model to simulate the breathing phenomenon in a 110 kV oil-immersed transformer, addressing the limitations of current manual inspection methods. This model analyses key breathing parameters such as breathing volume and maximum breathing rate, along with their dynamic characteristics under various load factors and ambient temperatures, revealing nonlinear and linear relationships, respectively. To validate the model, the breathing parameters of a 110 kV oil-immersed transformer were monitored over a 7-day period using a breather equipped with a breathing monitoring functionality. Comparison between simulation results and monitoring data for the period from 7 p.m. March 7 to 7 p.m. March 8 revealed discrepancies of 6.93% for the maximum daily breathing rate and 6.73% for maximum daily breathing volume. This study contributes to the field by providing a more accurate and efficient method for analysing transformer breathing dynamics, potentially enhancing early detection of breathing system malfunctions, optimising breather maintenance schedules and improving diagnosis of pressure-related faults in oil-immersed transformers.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"668-680"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146161001","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

A Novel Converter Transformer DAM-LSTNet Vibration Generation Model for Data Imbalance Identification 一种用于数据不平衡识别的新型换流变压器DAM-LSTNet振动生成模型

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-04-06 DOI: 10.1049/hve2.70180

Peiyu Jiang, Fanghui Yin, Liming Wang

{"title":"A Novel Converter Transformer DAM-LSTNet Vibration Generation Model for Data Imbalance Identification","authors":"Peiyu Jiang, Fanghui Yin, Liming Wang","doi":"10.1049/hve2.70180","DOIUrl":"10.1049/hve2.70180","url":null,"abstract":"Converter transformer vibration failures, primarily because of winding and core vibrations, severely impact the safe operation of high voltage direct current (HVDC) systems. These vibrations are influenced by voltage and current, and are transmitted through transformer oil and structural components to the tank. Current numerical models fail to accurately capture the vibration transmission process, obscuring the relationship between vibration sources and tank responses. This paper treats the vibration transmission path as a ‘black box’, establishing a database under varying operating conditions based on the correlations among voltage, current and tank vibration. A long-and-short-term time series network (LSTNet) is used to extract local correlations and long-term dependencies, and a dimensional attention mechanism (DAM) optimises input variable weights, whereas the winding and core vibration principles are also embedded in the loss function as boundary constraints. The proposed DAM–LSTNet model is validated under different conditions, demonstrating reliability and portability for complex tank structures. Compared to traditional prediction methods such as long short-term memory (LSTM), gate recurrent unit (GRU), convolutional neural network (CNN) and backpropagation neural network (BP), it shows superior generation performance. The results can expand the dataset of similar vibration characteristics across multiple operating conditions and provide richer sample data for the artificial intelligence algorithm for converter transformer state identification and fault diagnosis.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"620-632"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147625798","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

DC Side Impedance Modelling of an Actual Line Commutated Converter High Voltage Direct Current System and DC Resonance Characteristics 实际线路整流变换器高压直流系统的直流侧阻抗建模及直流谐振特性

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-04-30 DOI: 10.1049/hve2.70194

Juanjuan Wang, Juntao Liu, Qingming Xin, Ze Mo, Baixian Ye, Yuekun Liu, Chuang Fu

{"title":"DC Side Impedance Modelling of an Actual Line Commutated Converter High Voltage Direct Current System and DC Resonance Characteristics","authors":"Juanjuan Wang, Juntao Liu, Qingming Xin, Ze Mo, Baixian Ye, Yuekun Liu, Chuang Fu","doi":"10.1049/hve2.70194","DOIUrl":"https://doi.org/10.1049/hve2.70194","url":null,"abstract":"The stability analysis of Line Commutated Converter High Voltage Direct Current (LCC-HVDC) is of considerable engineering importance. Establishing its analytical mathematical model helps to analyse stability and the factors that affect stability of the system. This paper developed the six-pulse model based on the principles of synchronous firing control of the six-pulse converter and single sideband modulation principle. By precisely solving the firing and commutation end time offsets for each valve, the small-signal model for the six-pulse converter is derived. Subsequently, the harmonic state-space model and its corresponding harmonic transfer function model in the Laplace domain for LCC are constructed, which can be further transformed into the impedance matrix on the DC-side. Based on the impedance analysis method and maximum peak Nyquist criterion, the established DC impedance model is used to study the resonance mechanism. The result shows that the small stability margin of the system at 125 Hz are the reasons for resonance. Further research was conducted on the influence of control system parameters and control delays on system stability. A Butterworth band-stop filter has been added to the constant current control system of Xing-An HVDC project for suppression of harmonic oscillation. This article has certain reference significance for the planning and operation of HVDC transmission systems.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"725-737"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358281","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

Influence of Arc Faults on Pressure Production Characteristics in AC Turret of UHV Transformers 电弧故障对特高压变压器交流转塔产压特性的影响

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-03-05 DOI: 10.1049/hve2.70173

Yuhang Li, Yuanxiang Zhou, Guimin Jiang, Licheng Lu, Hongchuan Dong

{"title":"Influence of Arc Faults on Pressure Production Characteristics in AC Turret of UHV Transformers","authors":"Yuhang Li, Yuanxiang Zhou, Guimin Jiang, Licheng Lu, Hongchuan Dong","doi":"10.1049/hve2.70173","DOIUrl":"10.1049/hve2.70173","url":null,"abstract":"The overpressure caused by arc fault in the oil tank can lead to a transformer explosion. Since the AC turret of transformers serves to connect the transformer windings with the AC busbar, the arc current can be extremely high if an earth fault arc occurs leading to potentially hazardous pressure. It is necessary to investigate the relationship between arc faults and pressure to reduce the risk of explosions. In this paper, a full-scale arc fault simulation test platform in the AC turret of transformers has been established, and arc fault tests were carried out at different arc currents and arc lengths. A simulation model of gas production and pressure has been established to investigate the mechanism of overpressure caused by arc faults. The result shows that an arc with a current of 40 kA can produce a pressure wave with a peak of 1.58 MPa. The pressure distribution, gas volume and temperature were obtained during the arc discharge through the simulation model. The arc length has a greater influence on gas production than the arc current leading to higher pressure. The study provides both experimental and theoretical bases for the explosion-proof design of AC turret.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"633-645"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147368194","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

Enhancing Hydrophobic Stability of Silicone Rubber Insulators Under High-Voltage Direct Current Stress Through Optimised Nano-Fumed Silica Surface Area: A Dynamic Drop Test Study 通过优化纳米气相二氧化硅表面积来增强高压直流应力下硅橡胶绝缘子的疏水稳定性：动态跌落试验研究

IF 5.7 2区工程技术

High Voltage Pub Date : 2026-07-02 Epub Date: 2026-06-10 DOI: 10.1049/hve2.70210

Mahmoud A. Ali, Xingliang Jiang, Samir I. Gadow, Ruta W. Deusdedith

{"title":"Enhancing Hydrophobic Stability of Silicone Rubber Insulators Under High-Voltage Direct Current Stress Through Optimised Nano-Fumed Silica Surface Area: A Dynamic Drop Test Study","authors":"Mahmoud A. Ali, Xingliang Jiang, Samir I. Gadow, Ruta W. Deusdedith","doi":"10.1049/hve2.70210","DOIUrl":"https://doi.org/10.1049/hve2.70210","url":null,"abstract":"The long-term hydrophobic stability of silicone rubber (SiR) insulators is essential for their reliability in high-voltage direct current (HVDC) applications. This study investigates the effect of nano-silica fillers with varying specific surface areas (SSA = 120, 200 and 300 m2/g) and different concentrations of alumina trihydrate (ATH) fillers (5–50 wt.%) on the dynamic hydrophobicity of SiR using the dynamic drop test (DDT) under HVDC stress. Key performance indicators—hydrophobicity retention, recovery and transfer—were evaluated. Experimental results indicate that nano-silica, particularly with an SSA of 200 m2/g, (SFS200) significantly improves hydrophobic performance, offering the best balance of retention time, recovery, transfer and reproducibility. In contrast, high ATH loadings hinder the migration of low molecular weight and reduce recovery. Moderate ATH content (10 wt.%) showed optimal performance among ATH-filled samples but was still inferior to silica-filled composites. Although higher SSA enhanced retention time, an excessively high SSA (300 m2/g) resulted in agglomeration and consequently reduced recovery. These results confirm the superiority of fumed silica in improving the hydrophobic stability of SiR insulators and highlight the critical role of filler characteristics—particularly SSA, porosity and dispersion—in optimising SiR performance under HVDC stress. The study also demonstrates that additional experimental precautions improved DDT reproducibility, supporting its use in future standardisation.","PeriodicalId":48649,"journal":{"name":"High Voltage","volume":"11 3","pages":"823-837"},"PeriodicalIF":5.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/hve2.70210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358075","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