2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014)最新文献_第9页

Dielectric nanocomposite with high dielectric permittivity and low dielectric loss 具有高介电常数和低介电损耗的介电纳米复合材料

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223527

Youngho Jin, N. Xia, R. Gerhardt

{"title":"Dielectric nanocomposite with high dielectric permittivity and low dielectric loss","authors":"Youngho Jin, N. Xia, R. Gerhardt","doi":"10.1109/ICACACT.2014.7223527","DOIUrl":"https://doi.org/10.1109/ICACACT.2014.7223527","url":null,"abstract":"Dielectric flexible nanocomposites featuring ferroelectric barium titanate nanoparticles embedded in poly(vinylidene fluoride) (PVDF) matrix were fabricated by a miscible-immiscible coagulation method followed by hot pressing. The SEM images showed good distribution of nanoparticles with very little particle agglomeration. This microstructure was achievable with or without surface functionalization of the nanoparticles and resulted in high dielectric permittivity and low dielectric loss over a wide range of frequency (10 Hz to 1 MHz). Dielectric permittivity of the composite increased as the filler content increased from 0 to 47 vol % with only a small increase in dielectric loss. At a filler content of 47 vol %, the dielectric permittivity can reach 76 at 1 kHz which is more than 10 times higher than the PVDF matrix while the dielectric loss can remain at < 0.1 at 1 kHz. Due to the simplicity of the processing method, reliable dielectric properties and flexibility, this composite may be useful in many electronic applications such as capacitors and flexible high-k dielectrics components.","PeriodicalId":101532,"journal":{"name":"2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127932330","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: 6

Aging electric machines 老化的电机

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223545

H. Penrose, N. Frost

引用次数: 2

Optimization of reactive epoxy casting process of 15 kV outdoor sensor using advanced CFD simulations 基于先进CFD模拟的15 kV户外传感器活性环氧树脂铸造工艺优化

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223501

D. Raschka, Bandeep Singh

引用次数: 0

AC breakdown strength of epoxy-boron nitride nanocomposites: Trend & reproducibility 环氧-氮化硼纳米复合材料的交流击穿强度:趋势与再现性

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223609

I. Tsekmes, R. Kochetov, P. Morshuis, J. Smit

引用次数: 14

Study of occurrence of overvoltage along power transmission lines with acceptable end voltage 端电压可接受输电线路过电压发生的研究

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223503

V. F. Couto, S. Cabral, T. Mustafa, L. Puchale

{"title":"Study of occurrence of overvoltage along power transmission lines with acceptable end voltage","authors":"V. F. Couto, S. Cabral, T. Mustafa, L. Puchale","doi":"10.1109/ICACACT.2014.7223503","DOIUrl":"https://doi.org/10.1109/ICACACT.2014.7223503","url":null,"abstract":"For studies of insulation coordination at industrial frequency transmission line must be modelled with much more details than for other studies, like load flow and short circuit analyses. In other words, that usual representation of the transmission line by a single quadrupole Pi circuit is not applicable. In fact, all of the three-phase conductors must be analyzed separately though the determination of individual voltage profile for several conditions of load. This is so because it is possible that voltage to ground of each conductor presents itself as satisfactory at its ends whereas overvoltage may occur along some points in between them. Thus, an alternative and feasible way for modelling the transmission line is proposed by the authors. Although the proposed method is not new, it is has not been usual. For showing the importance of the proposed method a real 230 kV/197 km transmission line are taken and simulated results do show how the occurrence of overvoltage is possible, not only under fundamental frequency but also for harmonics. All the presented results are a clear evidence of the need in reevaluating some conceptions of insulation coordination for power transmission lines.","PeriodicalId":101532,"journal":{"name":"2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130502728","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: 6

Development of electrically insulating pipe sections for two-phase cooling of electrical and power-electronic devices 电气和电力电子设备两相冷却用电绝缘管段的研制

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223574

T. Gradinger, Patrik R. Kaufmann

引用次数: 1

New challenges in live-line maintenance 在线维护的新挑战

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223498

G. Gõcsei, B. Németh

引用次数: 11

Statistical analysis of simultaneous partial discharge measurements from IEC60270, HFCT and HFCT EMI methods IEC60270, HFCT和HFCT EMI方法同时局部放电测量的统计分析

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223573

R. Gillie, A. Nesbitt, R. Ramirez-Iniguez, B. Stewart, G. Kerr

{"title":"Statistical analysis of simultaneous partial discharge measurements from IEC60270, HFCT and HFCT EMI methods","authors":"R. Gillie, A. Nesbitt, R. Ramirez-Iniguez, B. Stewart, G. Kerr","doi":"10.1109/ICACACT.2014.7223573","DOIUrl":"https://doi.org/10.1109/ICACACT.2014.7223573","url":null,"abstract":"This paper investigates correlations of Partial Discharge (PD) measurements of associated statistical parameters from phase-charge-number Φ-q-n plots from IEC60270 PD measurements and High Frequency Current Transformer (HFCT) Φ-peak-n plot PD measurements. These are also compared with Electromagnetic Interference (EMI) Radio Frequency (RF) measurements. The three methods record simultaneously PD activity from 3 artificially created fault geometries on High Voltage cable sections, namely a semiconductor point fault, a large embedded particle fault and a smaller particle fault. One of the research aims is to demonstrate the potential for passive RF methods to show comparable results of fault characteristics with direct contact PD measurements. The ability to identify faults based on statistical analysis of IEC60270 Φ-q-n plot and HFCT Φ-peak-n plot deduced quantities, such as Skewness and Kurtosis is also highlighted. This is used in comparison with EMI energy in selected frequency bands to determine any related frequency characteristic changes. Comparisons for trended Skewness and Kurtosis measurements of IEC60270 vs HFCT peak measurements for the three faults are shown for the pulse count Hn(Φ)+ distribution.","PeriodicalId":101532,"journal":{"name":"2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131869571","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

Development of a recommended practice for the Measurement of PD from stator coils and bars 定子线圈和棒的局部放电测量推荐规程的制定

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223538

W. McDermid

引用次数: 0

Low temperature co-fired ceramics (LTCC) for the insulation coating of high temperature electrical conductors 低温共烧陶瓷(LTCC)用于高温电导体的绝缘涂层

2014 International Conference on Advances in Communication and Computing Technologies (ICACACT 2014) Pub Date : 2014-08-01 DOI: 10.1109/ICACACT.2014.7223526

Zijing Wang, R. Freer, L. Fang, I. Cotton

引用次数: 2