Pub Date : 2024-07-19DOI: 10.1109/tdei.2024.3431467
Yongsen Han, Jie Chen, Hang Yin, Yunlong Sun, Xinyu Wang, Zhonghua Li
{"title":"Improvement of Nonlinear Conductivity and Flashover Characteristics of SiC/LDPE Composite Via the DC Electric Field Assist","authors":"Yongsen Han, Jie Chen, Hang Yin, Yunlong Sun, Xinyu Wang, Zhonghua Li","doi":"10.1109/tdei.2024.3431467","DOIUrl":"https://doi.org/10.1109/tdei.2024.3431467","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"14 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745116","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}
Pub Date : 2024-07-19DOI: 10.1109/tdei.2024.3431464
Shijie Huang, Yi Liu, Liuxia Li, Chenqian Zeng, Fuchang Lin
{"title":"Electrical and Optical Diagnosis of Underwater Pulsed Arc Discharge at Different Conductivities","authors":"Shijie Huang, Yi Liu, Liuxia Li, Chenqian Zeng, Fuchang Lin","doi":"10.1109/tdei.2024.3431464","DOIUrl":"https://doi.org/10.1109/tdei.2024.3431464","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"195 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745115","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}
Pub Date : 2024-07-19DOI: 10.1109/tdei.2024.3431431
Chien-Kuo Chang, Yu-Hsiang Lin
{"title":"Defect Recognition for Partial Discharge Patterns of Gas Insulated Switchgear and Cable Joint Based on Deep Learning Methods","authors":"Chien-Kuo Chang, Yu-Hsiang Lin","doi":"10.1109/tdei.2024.3431431","DOIUrl":"https://doi.org/10.1109/tdei.2024.3431431","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141746384","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}
Pub Date : 2024-07-19DOI: 10.1109/TDEI.2024.3431442
Yijin Liu;Tao Zhao;Yunpeng Liu;Jiaxue Xu;Yunuo Liu;Chaojie Yang
The movement and aggregation of cellulose particles reduce the insulation performance of the transformer, thereby increasing the risk of oil-paper insulation failure. In this study, an experimental platform is constructed to synchronously record the particle motion images and voltage, allowing for the observation of the typical motion mode of the particle between electrodes, namely, the back-and-forth motion mode, under alternating current (ac) voltage. The connection between the cellulose particle’s movement and the ac voltage phase in this motion mode is subsequently examined, delving into the trajectory of particle motion, which is captured through the implementation of image processing technology. The results indicate that the cellulose particle does not always move in the direction of the electric field lines. Within one cycle of the power frequency voltage waveform, the particle exhibits two states: staying on the electrode surface and moving in the oil gap, with each state occupying approximately half of the time. In addition, the cellulose particle consistently moves within the oil gap during the second and fourth quadrants of the voltage cycle, while it remains on the electrodes during the first and third quadrants. Subsequently, an analysis model is conducted to simulate the particle’s trajectory as it moves between the electrodes, coupled with the calculations and analysis of the variation in the velocity and the primary forces exerted on the particle. The results show that the particle tends to move toward the more concentrated area of the electric field, and the closer it is to the center of the spherical electrode, the denser its motion trajectory is. This study provides a theoretical basis for the subsequent insulation hazard assessment of cellulose impurities.
{"title":"Motion Characteristics of Cellulose Particles in Oil—Analysis of the Synchronized Interframe Imaging and Voltage Observations","authors":"Yijin Liu;Tao Zhao;Yunpeng Liu;Jiaxue Xu;Yunuo Liu;Chaojie Yang","doi":"10.1109/TDEI.2024.3431442","DOIUrl":"10.1109/TDEI.2024.3431442","url":null,"abstract":"The movement and aggregation of cellulose particles reduce the insulation performance of the transformer, thereby increasing the risk of oil-paper insulation failure. In this study, an experimental platform is constructed to synchronously record the particle motion images and voltage, allowing for the observation of the typical motion mode of the particle between electrodes, namely, the back-and-forth motion mode, under alternating current (ac) voltage. The connection between the cellulose particle’s movement and the ac voltage phase in this motion mode is subsequently examined, delving into the trajectory of particle motion, which is captured through the implementation of image processing technology. The results indicate that the cellulose particle does not always move in the direction of the electric field lines. Within one cycle of the power frequency voltage waveform, the particle exhibits two states: staying on the electrode surface and moving in the oil gap, with each state occupying approximately half of the time. In addition, the cellulose particle consistently moves within the oil gap during the second and fourth quadrants of the voltage cycle, while it remains on the electrodes during the first and third quadrants. Subsequently, an analysis model is conducted to simulate the particle’s trajectory as it moves between the electrodes, coupled with the calculations and analysis of the variation in the velocity and the primary forces exerted on the particle. The results show that the particle tends to move toward the more concentrated area of the electric field, and the closer it is to the center of the spherical electrode, the denser its motion trajectory is. This study provides a theoretical basis for the subsequent insulation hazard assessment of cellulose impurities.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3469-3478"},"PeriodicalIF":2.9,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141746383","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}
Pub Date : 2024-07-15DOI: 10.1109/tdei.2024.3428514
T. Hammarström
{"title":"Overshoot level studies of PD Exposure in High Voltage Motor Isolation","authors":"T. Hammarström","doi":"10.1109/tdei.2024.3428514","DOIUrl":"https://doi.org/10.1109/tdei.2024.3428514","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"30 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717549","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}
Pub Date : 2024-07-11DOI: 10.1109/tdei.2024.3427052
Shaoqi Wang, Qiaogen Zhang, Zhicheng Wu, Yuhan Sun, Xiaoang Li
{"title":"Nanoscale Insights into Insulating Oil Emulsification: Dynamic Interplay of Temperature and Water Dynamics","authors":"Shaoqi Wang, Qiaogen Zhang, Zhicheng Wu, Yuhan Sun, Xiaoang Li","doi":"10.1109/tdei.2024.3427052","DOIUrl":"https://doi.org/10.1109/tdei.2024.3427052","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"82 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613765","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}
Pub Date : 2024-07-11DOI: 10.1109/TDEI.2024.3426492
Darshan Prakash Borthakur;Alok Ranjan Verma
In the present work, degradation analysis associated with the thermal stress in a 320-kV cross-linked polyethylene (XLPE) insulated cable insulation has been carried out. Accelerated thermal aging at 140 °C for 30 days is done for XLPE insulation to understand the material degradation. Physicochemical analyses such as Fourier transform infrared (FTIR) Spectroscopy, differential scanning calorimetry (DSC), and X-ray diffraction (XRD) analyses have been performed to understand the material degradation due to thermal stress. These material investigations show interesting features regarding changes in characteristic peaks and formation of carbonyl group, microstructural changes, and decreased degree of crystallinity with thermal aging as evident by FTIR, XRD, and DSC, respectively. Measurements of polarization and depolarization current (PDC) have been carried out in the thermally aged insulation samples. It is observed that with thermal aging the polarization and depolarization current magnitude seem to increase. A novel technique employing relaxation frequency distribution (RFD) has been used to get a deeper insight into the thermal degradation of the material by understanding the relaxation mechanism of the dipoles with the thermal aging. RFD spectrum shows a dominant slow polarization as the material undergoes thermal aging. Higher dielectric loss with thermal aging of the samples has been observed from the RFD spectrum. This higher dielectric loss is also validated using dielectric dissipation factor ( $tan delta $ ) measurement. Moreover, a correlation between RFD spectrum and physicochemical analyses has been established.
{"title":"Correlation Between Polarization Mechanisms and Material Characteristics in Thermally Aged 320-kV HVDC Cable Insulation","authors":"Darshan Prakash Borthakur;Alok Ranjan Verma","doi":"10.1109/TDEI.2024.3426492","DOIUrl":"10.1109/TDEI.2024.3426492","url":null,"abstract":"In the present work, degradation analysis associated with the thermal stress in a 320-kV cross-linked polyethylene (XLPE) insulated cable insulation has been carried out. Accelerated thermal aging at 140 °C for 30 days is done for XLPE insulation to understand the material degradation. Physicochemical analyses such as Fourier transform infrared (FTIR) Spectroscopy, differential scanning calorimetry (DSC), and X-ray diffraction (XRD) analyses have been performed to understand the material degradation due to thermal stress. These material investigations show interesting features regarding changes in characteristic peaks and formation of carbonyl group, microstructural changes, and decreased degree of crystallinity with thermal aging as evident by FTIR, XRD, and DSC, respectively. Measurements of polarization and depolarization current (PDC) have been carried out in the thermally aged insulation samples. It is observed that with thermal aging the polarization and depolarization current magnitude seem to increase. A novel technique employing relaxation frequency distribution (RFD) has been used to get a deeper insight into the thermal degradation of the material by understanding the relaxation mechanism of the dipoles with the thermal aging. RFD spectrum shows a dominant slow polarization as the material undergoes thermal aging. Higher dielectric loss with thermal aging of the samples has been observed from the RFD spectrum. This higher dielectric loss is also validated using dielectric dissipation factor (\u0000<inline-formula> <tex-math>$tan delta $ </tex-math></inline-formula>\u0000) measurement. Moreover, a correlation between RFD spectrum and physicochemical analyses has been established.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3313-3321"},"PeriodicalIF":2.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613762","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}
Partial discharge (PD) activity is an important indicator of insulation health in high-voltage power apparatuses. Ensuring optimal functioning and timely equipment maintenance is crucial for operational efficiency and safety. This article introduces an innovative approach to equipment monitoring by utilizing power line communication (PLC) technology for detecting PD data. The novelty of this approach lies in the PLC receiver’s dual capability to detect PD occurrences while simultaneously demodulating the PLC signal. This research analyzes the proposed low-cost, online PD monitoring system against traditional PD measurement techniques. Signals detectable by PLC were shown to propagate in PLC, allowing PLC to recognize PD from defect-simulated electrodes. To validate this, a simulated electrical substation circuit was constructed to facilitate the measurement of PD through the PLC system. The findings of this study indicate a good outcome for improving equipment monitoring procedures through the integration of PLC technology, providing a cost-effective alternative for continuous health assessment of electrical power equipment.
{"title":"Power Line Communication Application for Enhanced Partial Discharge Monitoring: From Theory to Application","authors":"Lunnetta Safura Lumba;Masahiro Kozako;Masayuki Hikita;Hidefumi Sato;Masahiro Soeda","doi":"10.1109/TDEI.2024.3425810","DOIUrl":"10.1109/TDEI.2024.3425810","url":null,"abstract":"Partial discharge (PD) activity is an important indicator of insulation health in high-voltage power apparatuses. Ensuring optimal functioning and timely equipment maintenance is crucial for operational efficiency and safety. This article introduces an innovative approach to equipment monitoring by utilizing power line communication (PLC) technology for detecting PD data. The novelty of this approach lies in the PLC receiver’s dual capability to detect PD occurrences while simultaneously demodulating the PLC signal. This research analyzes the proposed low-cost, online PD monitoring system against traditional PD measurement techniques. Signals detectable by PLC were shown to propagate in PLC, allowing PLC to recognize PD from defect-simulated electrodes. To validate this, a simulated electrical substation circuit was constructed to facilitate the measurement of PD through the PLC system. The findings of this study indicate a good outcome for improving equipment monitoring procedures through the integration of PLC technology, providing a cost-effective alternative for continuous health assessment of electrical power equipment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"2915-2921"},"PeriodicalIF":2.9,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588370","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":"Influence of Defect Type and Position in Composite Insulation Interfaces on Electric Field Distribution within Variable Speed Pumped Storage Generator Rotor Windings","authors":"Jian Wang, Yuxuan Song, Wei Wu, Hanwen Ren, Liang Zou, Qingmin Li","doi":"10.1109/tdei.2024.3425313","DOIUrl":"https://doi.org/10.1109/tdei.2024.3425313","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"40 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571866","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}
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