2020 IEEE 3rd International Conference on Dielectrics (ICD)最新文献_第2页

An Improved Weibull Model with Consideration of Thermal Stress for Analysis of Cable Joint Failures 考虑热应力的电缆接头失效分析改进Weibull模型

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341878

Huajie Yi, Ian Hancock, Dong Chen, Chengke Zhou

{"title":"An Improved Weibull Model with Consideration of Thermal Stress for Analysis of Cable Joint Failures","authors":"Huajie Yi, Ian Hancock, Dong Chen, Chengke Zhou","doi":"10.1109/ICD46958.2020.9341878","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341878","url":null,"abstract":"The Weibull model as a statistical method has been widely used for analysis of cable failure data and for prediction of future failure rate on an annual basis. However, previously published approaches cannot be relied on to model the phenomenon that higher number of failures of cable joint has been observed during summer time by Scottish Power Energy Networks (SPEN). Seasonal temperature higher than $20^{circ}mathrm{C}$ resulted in increasing failure rate of cable joints, especially for the joints which connect PILC cables. When the ambient temperature was lower than $15^{circ}mathrm{C}$, the failure rate of cable joint became smaller. This paper aims to improve the standard Weibull model to allow predictions of number of failures with consideration of seasonal temperature. The thermal stress caused due to seasonal temperature is treated as a variable to correct the failure rate obtained via standard Weibull analysis, as the number of failures has been heavily related to seasonal temperature. With the improved model, failure prediction can forecast higher number of failures during the summer season.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"18 1","pages":"609-612"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73628225","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

Silica surface modification with liquid rubbers & functional groups for new polyolefin-based dielectric nano-composites 用液体橡胶和官能团改性二氧化硅表面用于新型聚烯烃基介电纳米复合材料

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341981

R. Anyszka, Xiaozhen He, Amirhossein Mahtabani, I. Rytöluoto, Eetta Saarimäki, K. Lahti, M. Paajanen, W. Dierkes, A. Blume

{"title":"Silica surface modification with liquid rubbers & functional groups for new polyolefin-based dielectric nano-composites","authors":"R. Anyszka, Xiaozhen He, Amirhossein Mahtabani, I. Rytöluoto, Eetta Saarimäki, K. Lahti, M. Paajanen, W. Dierkes, A. Blume","doi":"10.1109/ICD46958.2020.9341981","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341981","url":null,"abstract":"A novel hybrid approach for surface modification of nano-silica for polyolefin-based dielectric composites is presented. A fumed nano-silica was modified with long oligomeric chains of a liquid rubber, connected via urethane bonds to the silica surface increasing the compatibility with the matrix. Additionally, a secondary amino-silane was grafted in order to alter the charge trapping properties of the silica. The long oligomeric chains provide good dispersibility of the nanosilica in polypropylene/poly(ethylene-co-octene) (PP/POE) blends, while the functional urethane group along with a secondary amino-silane affected the charge trapping properties of the nano-composites by reducing the charge traps density and simultaneously increasing their depth. Scanning Electron Microscopy along with Differential Scanning Calorimetry revealed that the silica is preferably located in the PP phase, most likely due to its lower viscosity in comparison to POE. The silica particles exhibit a nucleating effect visible in a noticeable increase of the crystallization temperature of the PP phase, especially when the silica surface treatment is performed.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"87 1","pages":"213-216"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84008448","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

Study on Gas Diffusion Distribution Law of Inverted Oil Immersed Current Transformer 倒置油浸式电流互感器气体扩散分布规律研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341827

Bonan Li, Youyuan Wang, Hongrui Gu

{"title":"Study on Gas Diffusion Distribution Law of Inverted Oil Immersed Current Transformer","authors":"Bonan Li, Youyuan Wang, Hongrui Gu","doi":"10.1109/ICD46958.2020.9341827","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341827","url":null,"abstract":"Oil-filled equipment such as inverted oil-immersed current transformers, etc., during operation, due to electric field, magnetic field, etc., the insulating oil will oxidize, crack and carbonize, causing some CH bonds and CC bonds to break through complex chemistry. The reaction is recombined to form gases such as CO, CO2, and H2. Because in the study of inverted oil-immersed current transformers, the gas generated by the head due to fault can only be detected by chromatographic analysis of the oil sample taken at the bottom of the transformer. Therefore, in order to study the law of gas diffusion from generation to stable diffusion in insulating oil, the gas diffusion distribution rule of 65kV inverted oil-immersed current transformer model was established by COMSOL simulation platform, and finite element analysis method, Multiphysics coupling analysis method were used to build the physical model and at the same time, to verify the experiment. The experimental and simulation results are mutually verified, and the diffusion distribution law of gas in insulating oil is obtained. The calculation model of gas diffusion distribution of current transformer is established, which provides a new idea for the maintenance of related equipment.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"30 1","pages":"724-727"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77852649","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

Preliminary Experimental Investigation of the Effect of Long Temporary Overvoltages on the Reliability of HVDC Extruded Cables 超长暂态过电压对高压直流挤压电缆可靠性影响的初步实验研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341916

G. Mazzanti, P. Seri, B. Diban, S. Stagni

引用次数: 2

Critical agglomerate sizes to improve the insulation characteristics of epoxy/TiO2 nanocomposites 改善环氧/TiO2纳米复合材料绝缘性能的关键团聚体尺寸

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341995

H. Muto, S. Yoshida, T. Umemoto, T. Mabuchi, M. Kurimoto

{"title":"Critical agglomerate sizes to improve the insulation characteristics of epoxy/TiO2 nanocomposites","authors":"H. Muto, S. Yoshida, T. Umemoto, T. Mabuchi, M. Kurimoto","doi":"10.1109/ICD46958.2020.9341995","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341995","url":null,"abstract":"Agglomerates of nanoparticles which inevitably occur in the fabrication process of epoxy nanocomposite can affect the insulation properties of epoxy nanocomposite. This paper presents an attempt to clarify the effect of agglomerate size on two important insulation properties of epoxy/TiO2 nanocomposite (NC). One is intrinsic AC breakdown strength and the other is long-term partial discharge lifetime. We used a centrifugation technique to control the maximum size of the agglomerates in the range from 5 μm down to 0.05 μm in each sample. As the results, AC intrinsic breakdown strength was increased with decreasing the maximum agglomerate size and became even higher than the neat epoxy resin when the maximum size is less than around 0.05um. On the other hand, partial discharge lifetime decreased with decreasing the maximum agglomerate size. It should be noted that the PD lifetime distinctively decreased when the agglomerate size is less than around 0.2 um indicating the existence of a critical agglomerate size which contribute to the suppression of partial discharge development resulting in the extension of the partial discharge lifetime.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"24 1","pages":"253-256"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82435287","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: 5

Performance Tests of Polyethylene Insulated High Voltage Low Attenuation Coaxial Cables for Pulsed Applications 脉冲用聚乙烯绝缘高压低衰减同轴电缆的性能试验

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341951

T. Stadlbauer, L. Ducimetière, D. Kontelis, T. Kramer, C. Pfeiler, K. Rethmeier, L. Sermeus

引用次数: 0

2D Charge Density Probing at Aluminum / SiNx Interface: a Sub-micrometric Investigation by Kelvin Probe Force Microscopy 铝/ SiNx界面二维电荷密度探测:开尔文探针力显微镜亚微米研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341864

C. Djaou, C. Villeneuve-Faure, L. Boudou, K. Makasheva, G. Teyssèdre

引用次数: 0

Space Charge Distribution Analysis in Polyethylene under High Static Pressure 高静压下聚乙烯空间电荷分布分析

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9342029

Jingxian Xu, Yewen Zhang, Yabo Sun, Dong Wang, F. Zheng, Yang Xu, Xuan Wang, Q. Lei, Z. An, S. Holé

引用次数: 0

Stressed Oil Volume Theory – Application in Transformers 应力油体积理论-在变压器中的应用

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341900

Petar Gabrić, Ana Orešković, V. Podobnik, A. Mikulecky

引用次数: 0

Research on External Insulation State Detection Method Based on Information Fusion 基于信息融合的外绝缘状态检测方法研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341929

Fuchun Chen, Haifeng Jin, Gangjie Zhou, Lijun Jin, Pei Cao, Qi Liu

引用次数: 0