Kenedy Marconi G. Santos;Marcelo B. Perotoni;Elvio P. Silva;Amélia M. Santos;Marcela S. Novo;Tagleorge M. Silveira;Polyane A. Santos;Décio R. M. Faria;Ronaldo M. Lima;Leonardo S. Caires;Marcos R. Gallego;Sérgio M. O. Tavares;Rui A. S. Moreira
{"title":"Measurement of Shielding Effectiveness in Coaxial Cables and Connectors With Various Dielectrics Using an Electric Field Probe","authors":"Kenedy Marconi G. Santos;Marcelo B. Perotoni;Elvio P. Silva;Amélia M. Santos;Marcela S. Novo;Tagleorge M. Silveira;Polyane A. Santos;Décio R. M. Faria;Ronaldo M. Lima;Leonardo S. Caires;Marcos R. Gallego;Sérgio M. O. Tavares;Rui A. S. Moreira","doi":"10.1109/TDEI.2025.3557368","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3557368","url":null,"abstract":"Ensuring proper shielding is essential for the electromagnetic compatibility of electronic devices and systems. This article investigates the shielding effectiveness (SE) of coaxial cables and connectors using an electric field probe (EFP). This study aims to identify shielding failures early to prevent costly fixes later. A method for measuring the electric field radiated by connectors and cables in both near-field and far-field conditions is presented. Additionally, an electromagnetic virtual model of the connector and cable is developed, incorporating the dimensions and properties of the dielectric material. The simulations focus on the impact of different dielectrics on the resonant frequency of the electric field, specifically common-mode energy. The results indicate that the dielectric properties do not affect the resonant frequency in the presence of a common-mode current distribution.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 5","pages":"3097-3104"},"PeriodicalIF":3.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10947599","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Nanocomposite-Based Insulation Systems: A Review of Materials and Techniques for High-Voltage Applications","authors":"Saeideh Alipoori;Keyvan Firuzi","doi":"10.1109/TDEI.2025.3574950","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3574950","url":null,"abstract":"Compared to conventional insulation materials, nanocomposite (NC)-based insulation systems represent novel progress in high-voltage (HV) systems, offering superior electrical, thermal, and mechanical properties. This review comprehensively analyzes the materials and fabrication methods used to develop NC insulation systems with a well-defined application, such as energy storage devices, power transmission lines, transformers, and capacitors. Nanoparticles (NPs) such as carbon nanotubes (CNTs), graphene, alumina, and boron nitride (BN) can enhance dielectric breakdown strength, mechanical robustness, and thermal conductivity. NCs offer reduced dielectric loss and adjustable permittivity, making them ideal candidates for energy storage and capacitive applications. However, some challenges remain in the large-scale fabrication of NC insulation systems. Cost considerations, controlling filler-matrix interactions, preventing NP agglomeration, achieving uniform NP dispersion within the polymer matrix, and scaling up production are key issues. Agglomeration, which leads to uneven NP distribution, negatively affects the material’s properties and performance, making it one of the major tasks to solve for improving NC systems. Developing biodegradable and recyclable NCs and exploring new nanomaterials are the future perspectives of hybrid insulation systems. This progress could result in more sustainable, multifunctional insulation materials and efficient systems for next-generation HV applications. This review outlines both the current state and prospects of NC insulation systems in power systems.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"1867-1879"},"PeriodicalIF":3.1,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrically Manipulated Water Accumulation in Insulating Oil: Insights From Molecular Dynamics Simulations","authors":"Shaoqi Wang;Qiaogen Zhang;Jiahe Zhu;Tonglei Wang;Zhicheng Wu","doi":"10.1109/TDEI.2025.3571384","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3571384","url":null,"abstract":"To reduce the potential threat of water in electrical equipment, it is crucial to study the mechanisms of water accumulation in insulating oil under electrical manipulation. This study established an oil-water mixture model using molecular dynamics (MDs) simulations to quantitatively explore the dynamic evolution of water clusters under different electric fields. Key findings indicate that under a direct current (dc) electric field, polar water molecules align with the field. At dc electric field strengths (<inline-formula> <tex-math>${E} _{text {DC}}$ </tex-math></inline-formula>) below 0.50 V/nm, interactions between water molecules strengthen, leading to tighter aggregation and increased nucleation and growth rates. As <inline-formula> <tex-math>${E} _{text {DC}}$ </tex-math></inline-formula> increases, polarization intensifies, enhancing oil-water interactions, restricting water mobility, and inhibiting new nucleation. Existing droplets stretch and grow rapidly, with reduced internal density, causing structural instability. Under an alternating current (ac) electric field, water molecule orientation adjusts periodically. At electric field amplitudes <inline-formula> <tex-math>$text {(}{E}_{{0}}text {)}$ </tex-math></inline-formula> below 0.50 V/nm, weak polarization and depolarization effects reduce water molecule migration. However, stronger intermolecular attraction tightens molecular aggregation, leading to increased collision frequency, which subsequently enhances nucleation and growth rates. As a result, the formed water clusters tend to hover near the center of the electric field. As <inline-formula> <tex-math>${E}_{{0}}$ </tex-math></inline-formula> exceeds 0.50 V/nm, stronger periodic polarization enhances aggregation, resulting in more vigorous motion and the formation of larger, more stable droplets. Relatively speaking, the ac field shows stronger dynamic regulation, accelerating water molecule aggregation and nucleation, particularly at <inline-formula> <tex-math>${E}_{{0}}=2.00$ </tex-math></inline-formula> V/nm. This study provides key insights into the dynamic behavior of water in electrical equipment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 5","pages":"2722-2729"},"PeriodicalIF":3.1,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aleksey A. Petrov;Sergey Yu. Savinov;Ravil Kh. Amirov;Igor S. Samoylov
{"title":"Nanosecond Discharge in Non-Boiling Liquid Nitrogen","authors":"Aleksey A. Petrov;Sergey Yu. Savinov;Ravil Kh. Amirov;Igor S. Samoylov","doi":"10.1109/TDEI.2025.3571687","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3571687","url":null,"abstract":"Nanosecond discharge has been studied in non-boiling liquid nitrogen. The discharge is initiated in the gap in the central conductor of a coaxial waveguide with an impedance of <inline-formula> <tex-math>$50~Omega $ </tex-math></inline-formula>. The gap varied within 10–<inline-formula> <tex-math>$100~mu $ </tex-math></inline-formula>m. The dielectric of the waveguide and the discharge medium is non-boiling liquid nitrogen at atmospheric pressure and temperature 65 K. The amplitude of the voltage pulse is +/–12–25 kV, the duration is 7 ns, the voltage rise time is 150 ps. It is found that the leading edge of the discharge current is less than 80 ps. According to estimates, the electron ionization rate <inline-formula> <tex-math>$nu _{i}$ </tex-math></inline-formula> is more than <inline-formula> <tex-math>$7.5cdot 10^{{10}}$ </tex-math></inline-formula> <inline-formula> <tex-math>${mathrm {s}}^{-{1}}$ </tex-math></inline-formula> and the ionization rate constant <inline-formula> <tex-math>${k} _{i}$ </tex-math></inline-formula> is more than <inline-formula> <tex-math>$4.2cdot 10^{-{12}}$ </tex-math></inline-formula> cm3<inline-formula> <tex-math>${mathrm {s}}^{-{1}}$ </tex-math></inline-formula> in non-boiling liquid nitrogen at 65 K. A passing electromagnetic coupling wave with amplitude about 10 kV and duration 150 ps is detected behind the discharge gap in the waveguide. The formation of electromagnetic coupling wave is numerically demonstrated. The dependence of the discharge delay time on the electric field in the gap is measured. The formation of <inline-formula> <tex-math>$20~mu $ </tex-math></inline-formula>m size erosion craters is found at the surface of the electrodes demonstrating the possible role of the micro-explosive processes in the discharge mechanism.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 5","pages":"2783-2787"},"PeriodicalIF":3.1,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Jayasree;Issouf Fofana;Esperanza Mariela Rodriguez-Celis;Patrick Picher;S. Brettschneider
{"title":"Reclamation of Synthetic Ester Dielectric Liquids by Pressure and Gravity Percolation Methods","authors":"T. Jayasree;Issouf Fofana;Esperanza Mariela Rodriguez-Celis;Patrick Picher;S. Brettschneider","doi":"10.1109/TDEI.2025.3551678","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3551678","url":null,"abstract":"The tremendous demand for electricity requires higher operating voltages, which in turn impose great stress on the transformer insulation system. Condition-based maintenance and liquid decontamination are activities for assessing the risks and extending the service life of such systems. It is therefore important to explore the reclamation of the new biodegradable liquids. It is known that adsorbent-based reclamation is a prominent approach to treating insulating liquids. The present article provides the results of an experimental study on the reclamation of two low-pour-point synthetic ester fluids and a typical synthetic ester liquid using magnesium silicate-based adsorbents. The experimental results also include mineral insulating oil for a baseline reference. All four of these liquids were subjected to accelerated aging under open beaker conditions in the presence of cellulose. The aged liquids were then regenerated by pressure and gravity percolations with two magnesium silicate-based adsorbents. Physicochemical and electrical characterizations were conducted on both the feed and the filtrate. It is inferred that magnesium silicate-based adsorbents have some potential for the reclamation of synthetic esters by removing the polar compounds that evolved with the liquid’s service life.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 5","pages":"3012-3018"},"PeriodicalIF":3.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zijian Wang;Yiming Lei;Fei Yan;Lin Yang;Zichen Wang;Yanfeng Ma
{"title":"AC Surface Flashover Characteristics at the Clear Edge of Metallized Polypropylene Film Capacitors","authors":"Zijian Wang;Yiming Lei;Fei Yan;Lin Yang;Zichen Wang;Yanfeng Ma","doi":"10.1109/TDEI.2025.3550912","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3550912","url":null,"abstract":"Surface flashover significantly affects the insulation performance of metallized film capacitors (MFCs), and the clear edge is the main area where the surface flashover occurs. An experimental platform is built to study ac surface flashover at the clear edge of metallized polypropylene film capacitors. The effects of interlayer pressure, experiment temperature, clear edge width, square resistance, absolute humidity, and voltage frequency on the ac surface flashover of metallized films are investigated. The results indicate that the surface flashover voltage and field strength increase with the increase of interlayer pressure in the range of 100–800 kPa and decrease with the increase of experiment temperature in the range of <inline-formula> <tex-math>$30~^{circ }$ </tex-math></inline-formula>C–<inline-formula> <tex-math>$90~^{circ }$ </tex-math></inline-formula>C; the flashover field strength decreases by 44% and gradually tends to be stable as the clear edge width varies from 0.5 to 2.5 mm; the surface flashover voltage and field strength increase by 78% as the square resistance increases from 7.5 to <inline-formula> <tex-math>$50~Omega $ </tex-math></inline-formula>/<inline-formula> <tex-math>$Box $ </tex-math></inline-formula>; the surface flashover voltage increases with the increase of absolute humidity in the range of 4–16 g/m3; the surface flashover voltage and field strength decrease by 4% with the increase of voltage frequency in the range of 50–400 Hz. In the design and manufacture of MFCs, the interlayer pressure of outer films should be appropriately increased; the design of the clear edge width of MFCs with different square resistance, operating temperatures, and voltage frequencies can be selected according to the experimental results of this article. Since the moisture will be removed by heating and vacuumizing in the capacitor manufacturing process, the design of the clear edge width could refer to the experimental results under low humidity.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1305-1313"},"PeriodicalIF":2.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation on the Diffusion Characteristics of Dissolved Gas in an Actual 400 kV Converter Transformer—Effects of Fault Types","authors":"Jia Tao;Xiongying Duan;Peng Yu;Minfu Liao;Zhengqin Zhou;Hao Zhan","doi":"10.1109/TDEI.2025.3549714","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3549714","url":null,"abstract":"The dissolved gas analysis (DGA) technology is a key method for monitoring large oil-immersed transformers. However, the large size, complex structure, and extended gas diffusion paths of high-capacity transformers make the diffusion characteristics of fault-generated gases within the transformer unclear, which limits the detection accuracy of DGA technology. This article investigates the diffusion characteristics of dissolved gases in a ±400 kV converter transformer under various fault types and analyzes the temporal changes in gas concentration at different monitoring points during the diffusion process. The results show that oil flow velocity is the primary factor influencing the diffusion of dissolved gases in the transformer. Although the concentration of fault gases does not affect the diffusion path of dissolved gases in the transformer, it does influence the diffusion rate. Moreover, the oil flow circulation at the turret on the ac side of the converter transformer is slow and directional, which impedes the diffusion of dissolved gases in the transformer oil, thereby hindering timely fault detection. The results of this study offer significant insights for the installation of dissolved gas monitoring devices in field converter transformers and the determination of the optimal monitoring cycle interval.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 5","pages":"3019-3027"},"PeriodicalIF":3.1,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Partial Discharge Denoising of High-Voltage Cables for High-Speed Trains Based on Singular Spectrum Analysis and ICEEMDAN Decomposition","authors":"Guoqiang Gao;Shiyu Zhan;Siwei Yang;Shuyuan Zhou;Kai Liu;Kui Chen;Dongli Xin;Yujing Tang;Guangning Wu","doi":"10.1109/TDEI.2025.3564933","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3564933","url":null,"abstract":"Partial discharge (PD) detection is an effective method to evaluate the insulation status of cables for high-speed trains. Various factors in the detection process due to external interference make it difficult to get the ideal PD signal. Periodic narrow-band interference and random white noise are the main interference factors in the PD signal. A PD denoising method based on singular spectrum analysis (SSA) and improved adaptive noise-complete ensemble empirical modal decomposition (ICEEMDAN) is proposed in this article. With the method, by selecting the maximum value of singularity slope as the dividing point between narrowband interference and valid signal after grouping, the SSA algorithm selects the valid signal part for signal reconstruction, the noisy PD signal with white noise interference is decomposed into multiple eigenmodes by ICEEMDAN decomposition, which effectively avoids the modal blending in the empirical modal decomposition, sorts the intrinsic mode function (IMF) components further by the kurtosis criterion, and reconstructs the filtered IMF components, which extracts the pure ideal PD signal. Through denoising analysis of simulated PD signals and measured signals, the noise rejection ratio (NRR) of this method is 19.1836 in the laboratory and 16.389 in the depot, both higher than other methods. Therefore, this method has better denoising effect on noisy PD signals and can retain the original PD information to a higher degree.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2294-2303"},"PeriodicalIF":3.1,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jatoth Varun;Palash Mishra;Addala Dharanish;Ayman El Hag;R. Sarathi;Mithun Mondal
{"title":"Aging Characteristics of Ceramifiable Silicone Rubber Nanocomposites Exposed to Electrolytic Solution","authors":"Jatoth Varun;Palash Mishra;Addala Dharanish;Ayman El Hag;R. Sarathi;Mithun Mondal","doi":"10.1109/TDEI.2025.3548973","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3548973","url":null,"abstract":"The capability to transform into a flame-retardant ceramic body when encountering high temperatures makes low melting glass (LMG) powder an effective additive for room temperature vulcanized (RTV) silicone rubber composites, which are used as coating materials for outdoor high-voltage insulators operating in harsh environments. In this context, the present study examines the impact of nano LMG powder (LMGP) on the aging characteristics of 5 wt% boron nitride (BN)-doped silicone rubber nanocomposites exposed to a strong electrolytic aqueous ammonium chloride (NH4Cl) solution. LMG nanofiller was added in varying weight percentages of 3 and 7 wt%. Except for the 7 wt% LMG-doped composite, a distinct dip in weight gain, indicating higher degradation and detachment of filler particles, was noted in all the composites during diffusion test. Aging-induced deterioration of surface morphology is well evident in 3-D microscopy, contact angle, and Fourier transform infrared (FTIR) spectroscopic test results, which clearly demonstrate increased surface roughness and scissioning of side chains (Si-CH<inline-formula> <tex-math>$_{{3}}text {)}$ </tex-math></inline-formula> and backbone chains (Si-O–Si) in silicone rubber matrix of all the composites postaging. Furthermore, antipollution performance and thermal properties of all the test specimens were evaluated through inclined plane tracking and erosion test, thermogravimetric analysis (TGA), and IR thermography. The test results demonstrated that LMG-doped composites showed better tracking and erosion resistance, higher thermal stability, and lower surface temperature distribution during inclined plane tracking (IPT) compared to the only BN specimen before and after aging. The experimental results revealed that the 7 wt% LMG composite exhibited better resistance to degradation caused by the NH4Cl solution.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"1940-1948"},"PeriodicalIF":3.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lifespan Evaluation of HTV Silicone Rubber in Outdoor Composite Insulators Considering Temperature Cycling and Corona Discharge","authors":"Shiyin Zeng;Wendong Li;Xin Zhao;Yanan Peng;Yuelin Liu;Xinyi Yan;Guanjun Zhang","doi":"10.1109/TDEI.2025.3567210","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3567210","url":null,"abstract":"The reliability of high-voltage overhead lines is strongly correlated to the status of outdoor insulators, which is correlated to the condition of high-temperature vulcanized silicone rubber (HTV-SR) used as insulator sheds. Current research pays attention to HTV-SR’s degradation under different environmental stresses (e.g., temperature and corona discharge). However, the lifetime assessment of the aged HTV-SR is unclear, and the effect of temperature cycling is seldom considered. In this study, a remaining useful lifetime (RUL) prediction method for HTV-SR is proposed, which considers both temperature cycling and corona discharge. Accelerated lifetime tests of HTV-SR are conducted, and the key parameters of the model are determined by the experimental data. Thus, a formula for quantitative RUL prediction is put forward, which indicates that when the cyclic temperature is <inline-formula> <tex-math>$5.5~^{circ }$ </tex-math></inline-formula>C<inline-formula> <tex-math>$sim 21.3~^{circ }$ </tex-math></inline-formula>C and the electric field strength at the sample surface is 4.5 and 6.8 kV/cm, the RUL with 90% reliability is 25.9 and 8.4 years. Furthermore, verification of the prediction model is conducted using the elongation at break of field-aged insulators with different operation times. This study provides a method to estimate the RUL of HTV-SR materials, which can guide the maintenance of outdoor insulators of power transmission lines.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2403-2412"},"PeriodicalIF":3.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}