2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献

Study of Bubbles Evolution in Mineral Oil-paper Insulating System under Sudden Changes in Temperature 温度突变条件下矿物油-纸绝缘系统气泡演化研究

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705464

H. Wilhelm, P. Fernandes, L. Dill, K. Moscon, C. Steffens, S. Peres, V. Bender, T. Marchesan, J. B. Ferreira Neto

{"title":"Study of Bubbles Evolution in Mineral Oil-paper Insulating System under Sudden Changes in Temperature","authors":"H. Wilhelm, P. Fernandes, L. Dill, K. Moscon, C. Steffens, S. Peres, V. Bender, T. Marchesan, J. B. Ferreira Neto","doi":"10.1109/CEIDP50766.2021.9705464","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705464","url":null,"abstract":"Transformers at nominal operating temperatures present low risk of bubble formation in mineral oil-paper insulating systems. However, in the case of overload with meaning temperature increase, bubble formation risk significantly increases. That is of concern since it can increase partial discharge risk, alter oil dielectric strength and increase insulation thermal degradation around the bubble. Therefore, this study aims to assess dynamics of bubble formation under sudden temperature changes, in an experimental model comprised of mineral insulating oil and thermally upgraded kraft paper. Results show that bubble inception temperature is dependent on paper water content. Water content values above 1% in insulating paper favored bubble formation. Temperature of bubble inception decreased as water content increased, being 55 °C at 2.5% of water and 120 °C at 0.3% of water. Interestingly, abrupt changes in temperature caused bubble appearance in mineral oil-paper insulation system, regardless of paper water content.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"60 1","pages":"547-550"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73892580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of Leak Current and Charge Accumulation in Epoxy Resin at High Temperature Under High DC Stress 高温高压下环氧树脂泄漏电流和电荷积累的研究

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705371

Kosuke Sato, N. Hashimoto, H. Miyake, Yasuhiro Tanaka

{"title":"Evaluation of Leak Current and Charge Accumulation in Epoxy Resin at High Temperature Under High DC Stress","authors":"Kosuke Sato, N. Hashimoto, H. Miyake, Yasuhiro Tanaka","doi":"10.1109/CEIDP50766.2021.9705371","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705371","url":null,"abstract":"In this paper, the leakage current and charge accumulation characteristics of epoxy resin at high temperature under high electric stress were investigated. Generally, ceramic materials are used for the insulating substrate of power modules, but they are being replaced by epoxy resin-based substrates to reduce cost and to improve a heat cycle resistance. In polymeric insulating materials such as epoxy resin, dielectric breakdown occurs due to increased leakage current and distortion of the internal electric field caused by the space charge accumulation when high DC voltage is applied for a long time at high temperature. Therefore, it is important to understand the leakage current characteristics and the space charge accumulation characteristics of insulating materials at high temperature under high electric field. In this study, the leakage current and the charge accumulation of two types of epoxy resins made with different curing agents were evaluated using a direct current integrated charge method (DCIC-Q(t)) at high temperature under high electric field. The results show epoxy resin with acid anhydride curing agents (EP-NH) has a better insulating performance than that with amine-based curing agents (EP-A).","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"67 1","pages":"81-84"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74803329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Insulating Gases on Electrical Treeing in Epoxy Resin 绝缘气体对环氧树脂导电性能的影响

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705327

Qinghua Han, I. Iddrissu, Lujia Chen, S. Rowland

引用次数: 0

Charge Transport Characteristics of ZnO/Polyimide Nanocomposite Under Vacuum DC flashover ZnO/聚酰亚胺纳米复合材料在真空直流闪络下的电荷输运特性

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705326

Bo Zhang, Jiang Wu, Xiaoquan Zheng

{"title":"Charge Transport Characteristics of ZnO/Polyimide Nanocomposite Under Vacuum DC flashover","authors":"Bo Zhang, Jiang Wu, Xiaoquan Zheng","doi":"10.1109/CEIDP50766.2021.9705326","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705326","url":null,"abstract":"Polyimide is a commonly used polymer dielectric material on spacecraft. The vacuum and radiation environment can easily lead to the accumulation of static charge on the spacecraft and trigger the surface discharge. Therefore, improving the surface DC flashover voltage of the dielectric in the space environment is crucial to improve the reliability of the spacecraft. In this paper, ZnO/PI nanocomposite was prepared to improve the flashover voltage. The electrical performance test including the relative permittivity, surface and bulk resistivity of the specimen was tested. The thermally stimulated depolarizing current method was used to analyze the trap parameters. The results show that the flashover voltage of PI is enhanced by nano ZnO, among which the flashover voltage increases the most at 3wt% ZnO content. Further analysis shows that the surface flashover intensity depends on the trap density, conductivity and methods of charge transportation and accumulation. The higher the trap density and higher electrical conductivity in the ohmic region, the lower the charge accumulated and the higher the flashover.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"29 12 1","pages":"446-449"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78172545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Dielectric Heating of Polymers as a Consequence of High Harmonic Voltage Distortion 高谐波电压畸变引起的聚合物的介电加热

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705423

T. Linde, K. Backhaus, Rolf Terzan, Stephan Schlegel

引用次数: 1

Effect of Gamma Radiation on Charge Storage in PTFE Exposed to Electron Beam 伽玛辐射对电子束辐照下聚四氟乙烯中电荷储存的影响

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705388

A. Mezouar, V. Griseri, N. Saidi-Amroun, G. Teyssèdre, M. Saidi

引用次数: 1

The Polarization Charge Observation in Dielectric Material Using PEA Method 用PEA方法观察介电材料中的极化电荷

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705356

Kazuki Endo, Daiki Fukuhara, Kaisei Enoki, H. Miyake, Yasuhiro Tanaka

引用次数: 1

Electric Field Models for Liquid-Filled Insulation of Medium-Voltage AC/DC Distribution Technology 中压交直流配电技术充液绝缘的电场模型

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705406

A. Cremasco, M. Curti, J. van Duivenbode, E. Lomonova, D. Rothmund

引用次数: 1

Cable Rejuvenation Changes the Course of History at NV Energy: An In-depth Case Study 电缆再生改变了NV能源公司的历史进程:一个深入的案例研究

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705369

James Steele, James Schlagenhaft, W. Chatterton

引用次数: 0

The 3D Accumulation Characteristics of Surface Charges on Actual 550 kV GIL Tri-post Insulator under AC Voltage in SF6 SF6交流电压下实际550kv GIL三柱绝缘子表面电荷三维累积特性

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705468

Weiguo Li, Zhuodong Yang, Hongjian Zhou, C. Gao, Haozhi Shi, B. Qi, Chengrong Li

{"title":"The 3D Accumulation Characteristics of Surface Charges on Actual 550 kV GIL Tri-post Insulator under AC Voltage in SF6","authors":"Weiguo Li, Zhuodong Yang, Hongjian Zhou, C. Gao, Haozhi Shi, B. Qi, Chengrong Li","doi":"10.1109/CEIDP50766.2021.9705468","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705468","url":null,"abstract":"Surface charge accumulation is one of the most important factors causing surface flashover of gas-insulated metal-enclosed transmission line insulators. Surface charges not only distort the local electric field intensity but also provide charges for creeping discharge, which finally leads to flashover. The tri-post insulator is the most common applied insulator in GIL, and whose insulating properties could make the most significant contributions to maintain the safe and reliable operation of GIL. Aiming at discovering the accumulation characteristics of surface charge on actual GIL tri-post insulator in SF6 under AC voltage, a 3D surface charge measurement device based on electrostatic capacitive probe is developed in this paper, which has a charge resolution of 0.02803pC/(m2•nV) and a space resolution of 3.9mm2. The accumulation characteristics of surface charge under AC voltages with different voltage amplitude and different voltage application times were carried out. The results show that, in the context of AC voltage, there appears with both positive and negative charges accumulating on the surface. With the voltage amplitude increasing and application time prolonging, there are more charge accumulating on the abdomen zone than pillar zone, which could be attributed to the field strength differences in there two zones.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"11 1","pages":"359-362"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78292189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1