IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第5页

Partial Discharge and Degradation Characteristics of Cast Resin Transformers Due to Bipolar Impulse Application 双极脉冲作用下铸造树脂变压器的局部放电和退化特性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-25 DOI: 10.1109/TDEI.2024.3468249

Yuanhang Yao;Mizuki Miyagawa;Masayuki Hikita;Masahiro Kozako;Yoshihiro Harada;Katsutoshi Takei;Masaru Ikeda;Kazunori Miyazaki;Kazuhiro Futakawa

{"title":"Partial Discharge and Degradation Characteristics of Cast Resin Transformers Due to Bipolar Impulse Application","authors":"Yuanhang Yao;Mizuki Miyagawa;Masayuki Hikita;Masahiro Kozako;Yoshihiro Harada;Katsutoshi Takei;Masaru Ikeda;Kazunori Miyazaki;Kazuhiro Futakawa","doi":"10.1109/TDEI.2024.3468249","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3468249","url":null,"abstract":"The objective of our work is to investigate partial discharge (PD) behaviors and degradation characteristics in winding insulation of an actual 22 kV cast resin transformer (CRTr) when subjected to bipolar impulse voltages. A differential high-frequency current transformer (HFCT) was employed on the high-voltage coils to measure PD pulses induced by impulse voltages. Additionally, PD measurement at ac voltage was carried out to characterize the aging process resulting from the application of bipolar impulses. Experimental findings indicated that higher-level bipolar impulses could cause large-amplitude PDs in the windings, occurring at the peak value of the applied impulse voltages and increasing with the number of applied impulses. PD inception voltage (PDIV) at ac voltage decreased to the operating voltage, and the discharge amplitude and phasewidth in phase-resolved PD (PRPD) patterns increased due to impulse PD occurrences. Considering these results, it is evident that the bipolar lightning impulses could cause large-amplitude PDs, intensify impulse PD activity, and ultimately lead to dielectric breakdown in the CRTr windings. Space charge accumulation and residual charge deposition resulting from impulse PD play a significant role in the generation and the process of development for impulse PDs in the winding insulation, contributing to an acceleration effect in the degradation process and eventual insulation failure.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3489-3496"},"PeriodicalIF":2.9,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859238","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

Features of Partial Discharges in Bubbles Irradiated With X-Rays

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-23 DOI: 10.1109/TDEI.2024.3466111

Sergey M. Korobeynikov;Alexander V. Ridel;Svetlana S. Bobrovskaya;Vladimir E. Shevchenko

引用次数: 0

Impact of Interphase Dielectric Property on Electric Field Distribution of Polymer Nanocomposites

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-23 DOI: 10.1109/TDEI.2024.3465449

Farhina Haque

{"title":"Impact of Interphase Dielectric Property on Electric Field Distribution of Polymer Nanocomposites","authors":"Farhina Haque","doi":"10.1109/TDEI.2024.3465449","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3465449","url":null,"abstract":"The fast-switching frequency, high slew rate, and high voltage provided by the advanced power electronics inverters promote pa discharge (PD) in the turn-to-turn insulation in the inverter-fed motors. Polymer nanocomposites have been drawing the attention of researchers as PD-resistant insulating materials in inverter-fed motors. The high-volume fraction of interphase between the metal oxide nanoparticles and polymers improves the dielectric properties of the enameled wire. In this article, a numerical model of the electric field distribution of polymer nanocomposites is developed based on the dielectric properties of the interphase between the nanoparticles and metal oxides. The relative permittivity of the interphase region is first determined from the thickness and volume fraction of nanoparticles. A numerical model of polymer nanocomposites is developed in COMSOL Multiphysics to determine the electric field distribution for various interphase relative permittivity driven by the volume fraction of nanoparticles and interphase thickness. This numerical model is useful in designing polymer composites to effectively mitigate PD in inverter-fed motor windings.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"239-245"},"PeriodicalIF":2.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106400","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

The Electrical Conductivity Characteristics of Polyimide During the Thermal Cycle

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-23 DOI: 10.1109/TDEI.2024.3465468

Bingying Chen;Geng Chen;Ruyun Yang;Qilin Han;Tong Li;Cong Wang;Youping Tu

{"title":"The Electrical Conductivity Characteristics of Polyimide During the Thermal Cycle","authors":"Bingying Chen;Geng Chen;Ruyun Yang;Qilin Han;Tong Li;Cong Wang;Youping Tu","doi":"10.1109/TDEI.2024.3465468","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3465468","url":null,"abstract":"2 K/min and even faster rates of thermal cycle environments in low earth orbit alter the electrical conductivity characteristics of polyimide, which may exacerbate charge accumulation and electrostatic discharge (ESD) and seriously threaten the safety of spacecraft. This work focuses on the conductivity characteristics during the thermal cycle by leakage current measurement and demonstrates that the multiple energy levels traps play an important role in conductivity by the thermally stimulated depolarization current (TSDC) measurements. The results show that the current has a nonmonotonic temperature dependence with polar peaks and decreases periodically during the 5 K/min thermal cycle. After 24 thermal cycles, there is a 77.3% reduction in conductivity at 343 K and a 54.0% reduction compared with the 343 K steady-state temperature. The conductivity increases when the thermal cycle rate increases to 10 K/min. The results attribute to the combined effect of nonunidirectional dipole steering, thermally stimulated detrapping effects dominated by the shallower energy levels <inline-formula> <tex-math>$beta _{{1}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$beta _{{2}}$ </tex-math></inline-formula> traps, and trap-filling effects dominated by the deeper energy levels <inline-formula> <tex-math>$beta _{{3}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$alpha $ </tex-math></inline-formula> traps. The findings in this study can provide experimental support to reveal the conductivity variation mechanisms in time-varying temperatures.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"231-238"},"PeriodicalIF":2.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106399","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

Diagnosis and Localization of Moisture Defects in HV Cable Water-Blocking Buffer Layer Based on Characteristic Impedance Variation 基于特性阻抗变化的高压电缆阻水缓冲层湿气缺陷诊断和定位

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-18 DOI: 10.1109/TDEI.2024.3462903

Jingtao Huang;Kai Zhou;Qi Zhao;Yefei Xu;Pengfei Meng;Hao Yuan;Yao Fu;Siyan Lin

{"title":"Diagnosis and Localization of Moisture Defects in HV Cable Water-Blocking Buffer Layer Based on Characteristic Impedance Variation","authors":"Jingtao Huang;Kai Zhou;Qi Zhao;Yefei Xu;Pengfei Meng;Hao Yuan;Yao Fu;Siyan Lin","doi":"10.1109/TDEI.2024.3462903","DOIUrl":"10.1109/TDEI.2024.3462903","url":null,"abstract":"To identify and localize buffer layer moisture defects in high-voltage (HV) cables, this article verifies the effectiveness of the frequency-domain reflectometry (FDR) method theoretically and experimentally by analyzing the impact of moisture on the characteristic impedance of the cable. This article first analyzes the relationship between the electrical parameters of the buffer layer and the characteristic impedance of the cable. Subsequently, the electrical parameters were tested for buffer layer samples at different degrees of moisture, and the characteristic impedance of the cable was calculated. The results indicate that the characteristic impedance of the cable decreases after moisture exposure primarily due to a significant increase in the dielectric constant of the buffer layer. As the degree of moisture increases, the characteristic impedance gradually decreases until it becomes stable. This is mainly due to its rate of change being inversely related to the square of the dielectric constant of the buffer layer. This provides a theoretical basis for the implementation of the FDR method. Finally, this article conducted FDR tests on HV cables with different degrees of moisture, demonstrating that the FDR method can effectively locate buffer layer moisture defects.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3322-3330"},"PeriodicalIF":2.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261350","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

Performance Evaluation of Insulation Designs for Rotating Machines in More Electric Aircraft 更多电动飞机旋转电机绝缘设计的性能评估

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-17 DOI: 10.1109/tdei.2024.3462671

Chaofan Yu, Peng Wang, Andrea Cavallini, Yingwei Zhu, Qun Zhou, Shijin Ma, Wenhuan Zhao, Zeng Peng

引用次数: 0

Multi-parameter weight analysis and comprehensive performance evaluation of EPDM rubber under ultraviolet environment 紫外线环境下三元乙丙橡胶的多参数重量分析和综合性能评估

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-13 DOI: 10.1109/tdei.2024.3460729

Wenhao Deng, Hao Feng, Hao Guo, Yongjie Nie, Guochang Li, Yuanwei Zhu, Shengtao Li, Yanhui Wei

引用次数: 0

Charge injection barrier at the metal/oil-paper insulated interface based on first principles 基于第一原理的金属/油纸绝缘界面电荷注入屏障

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-13 DOI: 10.1109/tdei.2024.3460731

Yuqi Chen, Dayou Liu, Mrutyunjay Maharana, Jiacheng Zhou, Kai Wu, Ricardo Albarracín Sánchez, Niharika Baruah

引用次数: 0

Surface partial discharge characteristics under repeated positive triangular high voltages (1kV/s) 重复正三角高电压（1kV/s）下的表面局部放电特性

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-13 DOI: 10.1109/tdei.2024.3460735

Pantelis N. Mikropoulos, Pavlos K. Samaras

引用次数: 0

Discharge Monitoring and Aging Assessment Method for Metallized Film Capacitor Based on Acoustic Signal 基于声学信号的金属化薄膜电容器放电监测和老化评估方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-13 DOI: 10.1109/TDEI.2024.3460733

Linzi Zheng;Shengchang Ji;Xinyi Yan;Zhili Li;Qiming Sun;Lingyu Zhu

{"title":"Discharge Monitoring and Aging Assessment Method for Metallized Film Capacitor Based on Acoustic Signal","authors":"Linzi Zheng;Shengchang Ji;Xinyi Yan;Zhili Li;Qiming Sun;Lingyu Zhu","doi":"10.1109/TDEI.2024.3460733","DOIUrl":"10.1109/TDEI.2024.3460733","url":null,"abstract":"In modular multilevel converters (MMCs) of HVDC systems, metallized film capacitors (MFCs) are commonly used as dc-link capacitors. Based on the unique feature of the self-healing discharge, MFCs can clear internal defects and maintain operation stability. However, self-healing discharge can cause continuous aging of MFCs due to the accumulation of electrode area loss. Although electrical parameters are sufficiently investigated to monitor the operating states of MFCs, the correlation between discharge characteristics and aging states remains unclear based on these parameters. To address this issue, this article provides a novel perspective by proposing a discharge monitoring and aging assessment method based on the acoustic signal. First, an accelerated aging platform is established to obtain MFC samples in different aging degrees. Then, the acoustic signal and the pulse current signal of MFC samples are detected to demonstrate the feasibility of using acoustic signals as characteristic parameters. Furthermore, the processed discharge data are subject to cluster analysis to investigate the relationship between discharge statistic characteristics and the aging states of MFCs. The results indicate that the aging states of MFCs can be assessed using the frequency spectrum characteristics and the cluster ratio of acoustic signals, guiding future research on the monitoring methods of MFCs using nonelectrical parameters.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"11-19"},"PeriodicalIF":2.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261352","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