2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第7页

Enhanced thermal stability of electrical properties in PVDF/PMMA blend PVDF/PMMA共混物中电性能的热稳定性增强

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437384

Yang Zhang, Yongbin Liu, Chao Tang, R. Yao, Yu-Hang Fan, Jinghui Gao, L. Zhong

引用次数: 2

Application of Dynamic Greyscale Threshold Algorithm to Enhance Fractal Analysis of Streamers in Insulating Liquids 应用动态灰度阈值算法增强绝缘液体流光的分形分析

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437376

S. Shen, Ying Xu, Qiang Liu, Zhangdong Wang

{"title":"Application of Dynamic Greyscale Threshold Algorithm to Enhance Fractal Analysis of Streamers in Insulating Liquids","authors":"S. Shen, Ying Xu, Qiang Liu, Zhangdong Wang","doi":"10.1109/CEIDP49254.2020.9437376","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437376","url":null,"abstract":"Fractal analysis has been applied as a useful tool to quantitatively evaluate the streamer structure in insulating liquids. However, a fixed global greyscale threshold in the image binarization process can cause inevitable background noises and increase the uncertainty of the fractal analysis. This paper focuses on enhancing the fractal analysis by developing a dynamic greyscale threshold algorithm. The greyscale threshold for each pixel is dynamically estimated for a more accurate image binarization process. A unique background recognition method composed of two critical greyscale values is proposed to further reduce background noise in the binary streamer image. From the sensitivity study done in this paper, the square width in the algorithm was optimized at 80 pixels, while the difference between the two critical greyscale values for background recognition is set in the range of 25–40. The dynamic greyscale threshold algorithm is successfully applied to images of negative streamers obtained in five insulating liquids to enhance the fractal analyses.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128058119","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

Assessment of charge behavior in electrical tree of composite material based on characteristics of PD waveform 基于PD波形特性的复合材料电树电荷行为评价

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437548

N. Takeda, T. Kawashima, M. Kurimoto, Y. Murakami, N. Hozumi, S. Yoshida, T. Umemoto, T. Mabuchi, H. Muto

{"title":"Assessment of charge behavior in electrical tree of composite material based on characteristics of PD waveform","authors":"N. Takeda, T. Kawashima, M. Kurimoto, Y. Murakami, N. Hozumi, S. Yoshida, T. Umemoto, T. Mabuchi, H. Muto","doi":"10.1109/CEIDP49254.2020.9437548","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437548","url":null,"abstract":"Electric tree is a phenomenon of local dielectric breakdown with partial discharge (PD). It is also the final stage of insulation deterioration. The electrical treeing has been discussed by using conventional PD parameters such as the generation phase, charge amount and so on. Since the obtained PD waveforms were processed by an analog filter designed according to the frequency characteristics of the measurement instrument such as an oscilloscope, its waveform is a convolution of the original PD waveform and the transfer function of the measurement system. However, the feature values such as a rise time, fall time and frequency spectrum in the original PD waveform should show the behavior of electrons and ions in the discharge space. In this paper, the original PD waveforms generated in micro-silica/epoxy composite with the electrical tree were acquired, and the feature values of the original PD waveform were analyzed. In addition, the behavior of the electric charges in the discharge space was assessed from the change of the feature values.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130439104","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

Investigating the Emitted Signals of Partial Discharges for Diagnostic Applications in High Voltage Equipment 高压设备局部放电诊断信号的研究

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437550

Máté Szirtes, R. Cselkó, B. Németh

{"title":"Investigating the Emitted Signals of Partial Discharges for Diagnostic Applications in High Voltage Equipment","authors":"Máté Szirtes, R. Cselkó, B. Németh","doi":"10.1109/CEIDP49254.2020.9437550","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437550","url":null,"abstract":"The goal of this paper is to present the time and frequency domain behavior of the emitted electromagnetic signals of the three main types of partial discharges (corona, void and surface discharges) in the VHF and partially the UHF range, and to find the characteristic properties of these signals. A noise and interference free environment was used to measure the undistorted emitted signals of the discharge sources. The individual discharge pulses were investigated in both time and frequency domain, followed by the phase resolved investigation of their time domain behavior. A part of these results showed similarities, making it easier to use these properties for creating a universal digital filtering module. The other part of the results showed significant characteristic differences that were in-line with the traditional measurement results of the literature and can be used for signal separation. The results of this paper can be utilized in the development of the signal processing module of an on-site, real-time partial discharge location approximation system.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129693056","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

Crystallization of high temperature vulcanized silicone rubber: Effect of ATH concentration 高温硫化硅橡胶结晶:ATH浓度的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437561

Yuhao Liu, Yingfei Lin, Kangning Wu, Liming Wang

{"title":"Crystallization of high temperature vulcanized silicone rubber: Effect of ATH concentration","authors":"Yuhao Liu, Yingfei Lin, Kangning Wu, Liming Wang","doi":"10.1109/CEIDP49254.2020.9437561","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437561","url":null,"abstract":"High temperature vulcanized silicone rubber (HTVSR) insulators have been widely used on transmission lines. To improve the tracking and erosion resistance and flame retardant of HTVSR, a great of amount of aluminium hydroxide (ATH) is added. It inevitably influences the crystallization characteristics which are important since HTVSR insulators operate below the crystallization temperature. In this paper, to analyze influence of ATH on crystallization of HTVSR, differential scanning calorimeter (DSC), polarized optical microscopy (POM), and broadband dielectric spectroscopy (BDS) were used. A complete crystallization process has been observed by POM. DSC showed that ATH accelerated the crystallization and improved the melting temperature, which meaned that stability of crystal was enhanced. From the isochronal plot of dielectric permittivity, it was found that, with increase of ATH, the temperature of glass transition was lower and the temperature range during glass transition became wider, which indicated that ATH increased the cooperative rearrangement and inhomogeneity in amorphous region. These indicated that two phases (crystal and amorphous region) were more distinct due to ATH.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129447367","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

Hollow TiO2Spheres Effect on Dielectric Strength of Oil-Paper Composite Insulation 空心tio2球对油纸复合绝缘材料介电强度的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437535

Bai-xin Liu, Guangshuai Sun, Yupeng Ying, Y. Lv, Meng Huang, B. Qi

{"title":"Hollow TiO2Spheres Effect on Dielectric Strength of Oil-Paper Composite Insulation","authors":"Bai-xin Liu, Guangshuai Sun, Yupeng Ying, Y. Lv, Meng Huang, B. Qi","doi":"10.1109/CEIDP49254.2020.9437535","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437535","url":null,"abstract":"Dielectric strength of transformer oil and oil-impregnated paper has been widely investigated to ensure operation safety of power transformers and other electrical equipment. Addition of nanoparticles has exhibited the ability to improve insulation strength of oil or oil-impregnated paper. However, enhancement on breakdown strength of oil-paper composite insulation (OPCI) is still a challenge, especially under DC voltage. In this work, both solid and hollow TiO2 spheres were synthesized and added to transformer oil and oil-impregnated paper. DC breakdown voltages (DCBV) of OPCI before and after adding spheres indicates that modification effect of hollow spheres is superior to that of solid ones. After adding hollow spheres, the positive and negative DCBV of OPCI are increased to 1.42 times and 1.64 times of the positive DCBV of OPCI with solid spheres, respectively. Possible modification mechanism has been discussed and proposed based on further investigation of electric field distribution and interface-charge characteristic of OPCI with two kinds of spheres.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126282362","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 Surface Deviation of Solid Insulation on Impulsive Flashover Voltages Under Varying Environmental Conditions 不同环境条件下固体绝缘表面偏差对脉冲闪络电压的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437541

R. W. Macpherson, M. Wilson, I. Timoshkin, M. Given, S. Macgregor

{"title":"Effect of Surface Deviation of Solid Insulation on Impulsive Flashover Voltages Under Varying Environmental Conditions","authors":"R. W. Macpherson, M. Wilson, I. Timoshkin, M. Given, S. Macgregor","doi":"10.1109/CEIDP49254.2020.9437541","DOIUrl":"https://doi.org/10.1109/CEIDP49254.2020.9437541","url":null,"abstract":"In pulsed power engineering, solid spacers are used to insulate high voltage parts from extraneous metal parts. The applied voltage at which a discharge process initiates is important in the design process. In this paper, a method to potentially increase the failure voltage under multiple environmental conditions, without increasing the length of the solid spacer, was investigated. Three insulating materials: Delrin (Polyoxymethylene), Ultem (Polyetherimide) and HDPE (High Density Polyethylene), were tested under a 100/700 ns impulse voltage. Cylindrical spacers made of these materials were located in the center of a parallel-plane electrode setup in air, which provided a quasi-uniform field distribution. Breakdown tests published in this paper were performed in a sealed container at air pressures of −0.5, 0 and 0.5 bar gauge, with a constant relative humidity level of <10% RH. The materials were tested under both, negative and positive, polarity impulses. The surfaces of a set of solid spacers were subjected to a ‘knurled’ finish, where slight indentations are added to the surface of the materials, prior to testing, to allow comparison with the breakdown voltages for samples with ‘smooth’ (machined) surface finishes. For negative polarity impulses, the flashover voltage for smooth machined surfaces was generally higher than for knurled finishes. Under positive polarity impulses, the opposite effect was found to occur, where the flashover voltage of the samples with knurled surfaces was higher for all tests. The results will give designers, particularly within the pulsed power industry, information on flashover voltages of materials under an array of environmental conditions.","PeriodicalId":170813,"journal":{"name":"2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124479754","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

Degradation of Flame-retardant Cross-linked Polyolefin in Simulated Severe Environments 阻燃交联聚烯烃在模拟恶劣环境下的降解

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437472

N. Hirai, Hao-Long Zhou, Y. Ohki

引用次数: 0

Effects of Frequency and Temperature on Partial Discharge Characterization of Stator Windings 频率和温度对定子绕组局部放电特性的影响

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437438

Emre Kantar, E. Eberg, S. Hvidsten

引用次数: 3

Numerical Simulation of Surface Charge Accumulation on DC-GIS Insulating Spacer with Charge Transport Model 基于电荷输运模型的DC-GIS绝缘衬垫表面电荷积累的数值模拟

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI: 10.1109/CEIDP49254.2020.9437380

Hajime Shimakawa, Masahiro Sato, A. Kumada, K. Hidaka, T. Yasuoka, Y. Hoshina, M. Shiiki

引用次数: 0