IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第8页

Electrical conduction mechanism analysis of epoxy resin/microcapsule self-healing composites based on experiment and random distribution model 基于实验和随机分布模型的环氧树脂/微胶囊自愈合复合材料的电导机制分析

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI: 10.1109/tdei.2024.3447625

Keda Chen, Jingrui Wang, Chengyi Qin, Jian Wang, Jikui Liu, Shumin Zhang, Liang Zou, Li Zhang

引用次数: 0

Electrical and Physico-chemical Properties of XLPE Under Different Vulcanization Pressures for 500 kV EHVDC Cable Factory Joint 500 kV 超高压直流电缆工厂接头不同硫化压力下 XLPE 的电气和物理化学特性

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI: 10.1109/tdei.2024.3447619

Tianyin Zhang, Xiangrong Chen, Taqi ur Rahman, Jiahao Liu, Jiale Song, Ashish Paramane, Muhammad Awais

引用次数: 0

Dielectric Spectroscopy of Aqueous Insulating Oil Based on Maxwell-Wagner Modified Model 基于 Maxwell-Wagner 修正模型的含水绝缘油介电光谱学

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI: 10.1109/TDEI.2024.3448396

Jiangbo Qian;Zhilin Zhang;Cheng Peng;Liwei Shao;Gengda Li

引用次数: 0

Machine-Learning Supported Localization of Partial Discharges in Real-Size Transformer Winding Using Noninvasive Capacitively- Coupled Pulse Injection 利用无创电容耦合脉冲注入技术，在机器学习支持下定位实际尺寸变压器绕组中的局部放电

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI: 10.1109/TDEI.2024.3448401

Hamed Moradi Tavasani;Waldemar Ziomek;Behzad Kordi

{"title":"Machine-Learning Supported Localization of Partial Discharges in Real-Size Transformer Winding Using Noninvasive Capacitively- Coupled Pulse Injection","authors":"Hamed Moradi Tavasani;Waldemar Ziomek;Behzad Kordi","doi":"10.1109/TDEI.2024.3448401","DOIUrl":"10.1109/TDEI.2024.3448401","url":null,"abstract":"Partial discharges (PDs) in transformer windings can lead to failures, causing power grid instability and outages. Therefore, early detection and accurate localization of PD incidents are crucial. This article introduces an electrical approach for PD localization in transformer windings. The approach involves the noninvasive injection of pulses (resembling PD) into the winding and recording the propagated signals at the winding terminals (i.e., line bushing and neutral ends). Noninvasive PD injection is performed using a capacitive coupling due to the absence of electrical access to transformer winding conductors. Next, features are extracted from the recorded signals to correlate them with the location of the injection point. This study investigates the effect of the PD pulse injection point on its response waveform recorded at the terminals to identify features corresponding to the PD source using a single measurement. Certain features of captured signals are highly correlated with PD location. The proposed approach establishes an accurate disk-to-disk localization model, particularly for large transformers. It employs a supervised classifier for PD localization. The performance of the proposed approach is verified using experimental measurements.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"2984-2992"},"PeriodicalIF":2.9,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212889","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}

引用次数: 0

Power Transformers Insulation Faults Identification With DGA: A Molecular Dynamics-Assisted Method 利用 DGA 识别电力变压器绝缘故障：一种分子动力学辅助方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-22 DOI: 10.1109/TDEI.2024.3447616

Nan Zhou;Lingen Luo;Gehao Sheng;Xiuchen Jiang

{"title":"Power Transformers Insulation Faults Identification With DGA: A Molecular Dynamics-Assisted Method","authors":"Nan Zhou;Lingen Luo;Gehao Sheng;Xiuchen Jiang","doi":"10.1109/TDEI.2024.3447616","DOIUrl":"10.1109/TDEI.2024.3447616","url":null,"abstract":"The accurate and effective identification of power transformer insulation fault is critical in implementing corrective actions and preventing problem reoccurrence. While the dissolved gas analysis (DGA) forms the basis for fault identification, certain challenges still remain, including the absence of clear theoretical principles, conflict results, and the oversight of multiple faults. This article addresses these issues by employing molecular dynamics (MD) simulations to investigate the decomposition of mineral oil under various insulation fault conditions. Identification is eventually achieved by a clustering-based method with MD results as initial centers. To achieve this, the molecular model of transformer mineral oil is first constructed, and its decomposition mechanism and results are studied under different insulation fault conditions. Afterward, based on the MD results, certain ratios between the decomposed gases are selected and calculated, which are utilized as the initial centers of the clustering. Finally, the fault identification can be achieved by substituting the DGA data into the established clustering classifier. The proposed method is tested with both the IEC TC 10 database and the local DGA dataset. The results show a respective 83.4% and 89% success rate in identifying single or multiple faults, verifying the effectiveness of the proposed method.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3479-3488"},"PeriodicalIF":2.9,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212890","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}

引用次数: 0

Computational Exploration and Experimental Verification for Designing SF6 Alternatives 设计 SF6 替代品的计算探索和实验验证

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-21 DOI: 10.1109/tdei.2024.3446953

Hajime Shimakawa, Takahiro Umemoto, Akiko Kumada, Masahiro Sato

引用次数: 0

Micro-Mechanisms Driving Improvement in Cold Flow Properties of Natural Ester Insulating Oils 改善天然酯绝缘油冷流特性的微观机制

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-21 DOI: 10.1109/TDEI.2024.3446963

Yang Wang;Hanbo Zheng;Ke Wang;Peng Liu;Hongce Lan

{"title":"Micro-Mechanisms Driving Improvement in Cold Flow Properties of Natural Ester Insulating Oils","authors":"Yang Wang;Hanbo Zheng;Ke Wang;Peng Liu;Hongce Lan","doi":"10.1109/TDEI.2024.3446963","DOIUrl":"10.1109/TDEI.2024.3446963","url":null,"abstract":"Natural ester insulating oil is gaining popularity as an environmentally friendly and renewable alternative to mineral insulating oil, offering enhanced fire safety. However, challenges arise from its poor fluidity and high pour point, limiting its widespread adoption in transformers in cold environments. To address this, the study explores the electrostatic potential (ESP) and van der Waals (vdW) potential of the four primary triglycerides in soybean-based natural ester insulating oils. The investigation identifies trilinolenin as a key factor influencing low-temperature fluidity. By strategically increasing the content of trilinolenin in soybean-based natural ester insulating oil, the low-temperature fluidity and cold flow properties can be improved, consequently reducing the pour point. Molecular dynamics simulations further confirm that adding 0.5 times trilinolenin to the original soybean-based natural ester insulating oil effectively lowers the pour point. This research contributes valuable insights to enhance the applicability and reliability of natural ester insulating oil transformers in low-temperature environments.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"325-333"},"PeriodicalIF":2.9,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212893","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}

引用次数: 0

Space Charge and Conduction Characters of PP/POE Composites and Their Influence on the Aging Lifetime Under DC Voltage PP/POE 复合材料的空间电荷和传导特性及其对直流电压下老化寿命的影响2

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-21 DOI: 10.1109/TDEI.2024.3445333

Dan Cao;Zepeng Lv;Yunpeng Zhan;Shuai Hou;Yanqun Liao;Anying Cao;Kai Wu;Yonghong Cheng

{"title":"Space Charge and Conduction Characters of PP/POE Composites and Their Influence on the Aging Lifetime Under DC Voltage","authors":"Dan Cao;Zepeng Lv;Yunpeng Zhan;Shuai Hou;Yanqun Liao;Anying Cao;Kai Wu;Yonghong Cheng","doi":"10.1109/TDEI.2024.3445333","DOIUrl":"10.1109/TDEI.2024.3445333","url":null,"abstract":"The polypropylene (PP) has a great potential to be used as recyclable cable insulation, but its high hardness and brittleness make it not suitable for the cable manufacture. Polyolefin elastomer (POE) was usually dopped into PP to improve the mechanical property, but the electrical properties of PP/POE composites decrease. This article studied the mechanical and electrical properties of PP/POE composites with different contents. It is found that with the increase of POE content, the elastic modulus and tensile strength of PP/POE composites decrease. The 20%, 30%, and 40% POE composites have similar breakdown strengths, which are about 15% lower than that of PP. The breakdown strengths of 50% and 60% POE composites decrease fast with the increase of POE content. The conductivities of PP/POE composites increase with the increase of POE content at low electric field. At high electric field, the conductivity of 40% POE composites is the lowest among all the composites as it has reduced electrode electric field due to small amount of homocharge. The 20%, 30%, and 40% POE composites accumulate small amount of space charge, and the 50% and 60% POE composites accumulate high amount of heterocharge. It is due to the high amount of ionization in POE. The electrical aging lifetime of PP/POE composites is tested with step-stress method. It is found that the total aging lifetime of PP/POE composites decreases with the increase of POE content in step-stress tests. At low electric field strength, the aging lifetime of the 40% POE composites is longer than the other composites and PP. In total, the 20%, 30%, and 40% POE composites have similar electrical properties. To further improve the space charge accumulation in PP/POE composites, the ionization in POE should be reduced.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"214-221"},"PeriodicalIF":2.9,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212892","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}

引用次数: 0

Uncertainty of Electric Field Estimation in a Full-Sized Cable Based on Space Charge Measurement 基于空间电荷测量的全尺寸电缆电场估计的不确定性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-20 DOI: 10.1109/TDEI.2024.3446742

Norikazu Fuse;Shosuke Morita;Satoru Miyazaki;Toshihiro Takahashi;Naohiro Hozumi

引用次数: 0

The Influence of Electrode Structure on the Discharge Characteristics of Power-Frequency Arc in Insulating Oil 电极结构对绝缘油中工频电弧放电特性的影响

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-08-20 DOI: 10.1109/tdei.2024.3446745

Yunfei Jia, Xun Luo, Shengchang Ji, Wanjing Gao, Shuangrui Jia, Simeng Li, Fan Zhang

引用次数: 0