IEEE Transactions on Dielectrics and Electrical Insulation最新文献

{"title":"Catalytic Effects of Iron and Copper on Degradation of Natural Esters at Different Temperatures","authors":"Xuefeng Hu;Haoxi Cong;Xuan Zhang;Yuxuan Wang;Yulin Du;Qingmin Li","doi":"10.1109/TDEI.2024.3460732","DOIUrl":"10.1109/TDEI.2024.3460732","url":null,"abstract":"Natural esters are renewable, highly available, and have a high ignition point. It is considered a suitable alternative to mineral oil in the future development of low-carbon networks and smart grids. The bare silicon steel and copper used in transformers can promote aging of natural esters and shorten their service life. In this article, natural esters containing copper and iron are used for accelerated thermal aging at 100 °C, 120 °C, and 140 °C, and the physicochemical and electrical properties of the natural esters are tested. It is shown that the physicochemical and electrical properties of natural esters are substantially destroyed with increasing temperature. Copper is more catalytic and conductive, resulting in natural esters containing copper having inferior physicochemical and electrical property indices than those containing iron. However, the measured content of iron ions in the oil is much higher than that of copper ions in the oil. It can be seen that the catalytic ability of metals mainly depends on the elemental species rather than the elemental content. The above studies can provide theoretical guidance to reveal the mechanism of deterioration of natural esters by temperature and transition metals in transformers with bare copper and steel.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"342-348"},"PeriodicalIF":2.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261353","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":"Nanodielectric Fluids for Power Transformer Insulation and Cooling: A Review Identifying Challenges and Future Research Needs","authors":"Sai Pavan Kalakonda;Mona Ghassemi","doi":"10.1109/TDEI.2024.3459861","DOIUrl":"10.1109/TDEI.2024.3459861","url":null,"abstract":"It is becoming increasingly common for many oil-immersed power transformers (PTs) in many countries, including USA, to reach the end of their designed service life. Insulation issues fundamentally cause transformer failure. Due to the significant capital cost, customized design, and long lead time for delivery, it is less desirable to replace these essential element assets, especially for large ones. Instead, exploring novel insulation systems that may be used to upgrade existing oil-immersed transformers is considered. On the other hand, novel insulation systems that improve electrical insulation and thermal management are also attractive for new PTs, which lead to higher density designs. This review investigates nanodielectric fluids (NDFs) as alternatives to transformer oils. NDFs are nanofluids (NFs) wherein the base fluid is dielectric. Adding different nanoparticles (NPs) to the dielectric liquids will result in nanodielectric liquids. Choi and Eastman in 1995 revolutionized the area of PT oil research by inventing NFs that are said to have enhanced thermal transport properties. Similar investigations on PT oils led to the discovery that NPs are capable of enhancing the dielectric properties as well. This revolutionary research field has piqued the interest of many researchers, scientists, and industrialists all over the world. However, it is not easy to synthesize an NDF just by mixing any NP with PT oils. Several factors, such as NDF stability, NP concentration, size, shape, NDF viscosity, choice of surfactant, concentration of surfactant, time of ultrasonication, and cost, should be considered while synthesizing an NDF. Although many studies have been conducted using various base fluids and NPs, commercial NDFs for PTs have yet to be realized. This article critically reviews investigations done on NDFs for PTs, identifies technical gaps, and highlights future research needs. As a result, it can be a valuable source for further research.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"349-366"},"PeriodicalIF":2.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10679660","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212987","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":"Simulation Study of the Measurement Characteristics of Equipotential Shielding Capacitor Voltage Divider","authors":"Fanghui Yin, Shilin Shi, Jianchao Li, Bo Li, Liming Wang, Jianchao Zheng, Masoud Farzaneh","doi":"10.1109/tdei.2024.3457511","DOIUrl":"https://doi.org/10.1109/tdei.2024.3457511","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"99 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212881","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":"Improved Dielectric Properties of Polypropylene Films by Electron-beam Irradiation Modification for Power Capacitor","authors":"Meng Xiao, Yuyan Chen, Haoliang Liu, B. X. Du","doi":"10.1109/tdei.2024.3457534","DOIUrl":"https://doi.org/10.1109/tdei.2024.3457534","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"51 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212991","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":"Microscopic Mechanism Effect of Oxygen and Moisture on Pyrolysis of Transformer Insulating Paper","authors":"Haoxi Cong, Shaomin Quan, Xuefeng Hu, Xuan Zhang, Qingmin Li, Mingrong Xu","doi":"10.1109/tdei.2024.3456771","DOIUrl":"https://doi.org/10.1109/tdei.2024.3456771","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"63 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226980","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":"Voltage Endurance Characteristics of Cross-linked Polyethylene-Silicone Rubber Interface Subjected to DC and AC Voltages","authors":"Xiaodong Li, Hao Hu, Kairun Song, Zhengxue Wang, Zhidong Jia","doi":"10.1109/tdei.2024.3456773","DOIUrl":"https://doi.org/10.1109/tdei.2024.3456773","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"103 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212989","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":"Effect of Isotacticity on Thermal Oxidative Aging Performance of Polypropylene Films for HVDC Capacitors","authors":"Meng Xiao, X. D. Du, B. X. Du","doi":"10.1109/tdei.2024.3456786","DOIUrl":"https://doi.org/10.1109/tdei.2024.3456786","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"8 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212990","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":"A Novel Dual-Stage Semi-Supervised Learning Model for Fault Diagnosis in Transformers with Limited Imbalanced Labeled Data","authors":"Yanfei Sun, Tao Zhao, Shuguo Gao","doi":"10.1109/tdei.2024.3456777","DOIUrl":"https://doi.org/10.1109/tdei.2024.3456777","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"107 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212988","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":"A New Nondestructive Aging Characterization Method for Oil-Paper Insulation Based on the Transmission Characteristics of Complementary Split Ring Resonator","authors":"Mi Xiao;Gaoyan Yang;Wei Zhang","doi":"10.1109/TDEI.2024.3457742","DOIUrl":"10.1109/TDEI.2024.3457742","url":null,"abstract":"A novel method is proposed for the simple nondestructive characterization of the aging degree of oil-paper insulation materials based on a complementary split ring resonator (CSRR) in this article. Samples of oil-paper insulation are aged under different circumstances by accelerated thermal aging experiment. After that, the traditional characterization methods such as the acid value of insulating oil, the polymerization degree of insulating paper, the Raman spectra test of the insulating oil, microscopic characterization of insulating paper, and dielectric constant of the samples are tested to characterize the aging degree of the samples. In order to find a new way to make the characterization more convenient, microstrip line sensors with CSRR are prepared, and the resonant frequency deviation (<inline-formula> <tex-math>$Delta {f},$ </tex-math></inline-formula>) of the sensor loaded with insulating oil and insulating cardboard samples before and after aging are tested to show the effect of aging time and temperature on the aging degree. The experimental results show that the method proposed in this article can reflect the aging trend of oil-paper insulation to a certain extent.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"334-341"},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212870","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":"Dynamical similarity of streamer propagation in geometrically similar combined air gaps","authors":"Zhihang Zhao, Zhen Wang, Zemin Duan, Yangyang Fu","doi":"10.1109/tdei.2024.3457594","DOIUrl":"https://doi.org/10.1109/tdei.2024.3457594","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"179 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212992","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}