2019 IEEE Electrical Insulation Conference (EIC)最新文献_第8页

A New Representation of Paschen's Law Suitable for Variable Temperature Power Applications 适用于变温电源应用的Paschen定律的一种新表示

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046533

Aws Al-Taie, Chanyeop Park, P. Cheetham, C. Kim, L. Graber, S. Pamidi

引用次数: 4

Research on Stages of AC corona discharge Based on Visible Digital Images Gray-level Co-occurrence Matrix 基于可见数字图像灰度共生矩阵的交流电晕放电阶段研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046518

Ziqing Guo, Qizheng Ye, Yuwei Wang

{"title":"Research on Stages of AC corona discharge Based on Visible Digital Images Gray-level Co-occurrence Matrix","authors":"Ziqing Guo, Qizheng Ye, Yuwei Wang","doi":"10.1109/EIC43217.2019.9046518","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046518","url":null,"abstract":"In terms of optical image digital processing of gas discharge, the morphological research is mainly engaged in the image of UV, which has relatively few studies on discharge state by using grayscale texture information of visible images. Thanks to the progress of photoelectric detecting technique, the visible image contains more abundant space structure information, which makes it possible to detect the characteristic of grayscale texture information. In this paper, the 50Hz AC high voltage power source was applied to the 15mm needle-plane gap under room temperature and atmospheric pressure. The discharge images in the time scale of seconds were obtained by a high resolution digital camera. We introduce the research method of gray-level co-occurrence matrix into the corona discharge image processing. Contrast, entropy, correlation and the expected value ratio of vertical (90°) and horizontal (0°) directions are used to describe the state of corona development. The calculation results show that the contrast and entropy can effectively reflect the corona pre-breakdown state, and the correlation can effectively reflect the initial state. The expected value ratio can effectively reflect the process of growth, suppression, and gap-penetration of the discharge in the positive half cycle, which has a good correlation with the oscilloscope electrical signals. The method allows us to take advantage of visible light images to study the stages of AC corona, which provides a new method of low temperature plasma diagnostics.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131697814","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

Influence of Cavity Geometry on Partial Discharge Measurement at Very Low Frequency 腔体几何形状对甚低频局部放电测量的影响

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046579

S. Morsalin, B. Phung, M. Danikas

引用次数: 3

Geometrically Optimized Phase Configurations and Sub-conductors in the Bundle for Power Transmission Efficiency 几何优化相位配置和输电效率束中的子导体

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046541

M. Borghei, M. Ghassemi

引用次数: 4

Multivariate Time Series Modeling for Long Term Partial Discharge Measurements in Medium Voltage XLPE Cables 中压XLPE电缆长期局部放电测量的多元时间序列建模

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046633

Z. Ahmed, Mojtaba Rostaghi Chalaki, Kamran Yousfpour, J. Klüss

{"title":"Multivariate Time Series Modeling for Long Term Partial Discharge Measurements in Medium Voltage XLPE Cables","authors":"Z. Ahmed, Mojtaba Rostaghi Chalaki, Kamran Yousfpour, J. Klüss","doi":"10.1109/EIC43217.2019.9046633","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046633","url":null,"abstract":"A multivariate time series analysis was performed for a system of several PD response variables, i.e. average charge, number of discharge pulses, average charge current, and largest repetitive discharge magnitude over the data acquisition period. Experimental lifelong PD data obtained from cable samples subjected to accelerated degradation was used to study the dynamic trends and relationships among those aforementioned response variables. Stochastically formulated cointegrated variables recognized by those tests can be combined to form new stationary variables to estimate the parameters for the Vector Auto Regression (VAR) and Vector-Error Correction (VEC) models. The validity of both models was evaluated by generating Monte Carlo and Minimum Mean Squared Error (MMSE) simulated forecasts. True observed data and forecasted data mean values lie within the 95th percentile confidence interval responses which demonstrates the soundness and accuracy of both models. A life-predicting model based on the cointegrating relations between the multiple response variables, correlated with experimentally evaluated time-to-breakdown values, can be used to set an emergent alarming trigger and as a step towards establishing long-term continuous monitoring of partial discharge activity.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121821797","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

Examination of clearances during high voltage live-line working 高压带电线路工作间隙的检查

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046546

D. Szabó, G. Göcsei, B. Németh, C. Richárd, L. Rácz

{"title":"Examination of clearances during high voltage live-line working","authors":"D. Szabó, G. Göcsei, B. Németh, C. Richárd, L. Rácz","doi":"10.1109/EIC43217.2019.9046546","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046546","url":null,"abstract":"High voltage live-line maintenance (LLM) became a decisive working method in Hungary in the 1960s. Most of the LLM techniques and equipment - which are still in operation nowadays - were developed by Dr. Béla Csikós, who was one of the pioneers of high voltage live-line work. In those days the live maintainability of the power lines was a significant aspect during the design of towers and insulator strings. Contrarily, structures change year-by-year, especially regarding the insulators. Therefore, live working methods also shall be developed. Nowadays, new types of tower structures and insulator strings are used with reduced distances, which also means reduced clearance between the different potentials in the arrangement. During barehand live working method, the lineman has to keep the adequate distances from different potentials of power lines. Moreover, there is no uniform standard and international practice for the regulation of safety clearances. New type of mounting chair made of non-conductive material is suitable for approaching the insulator strings and their fittings safely, as the air gap between the conductive parts does not shorten. The aim of this paper is to investigate the usability of non-conductive mounting chair and the regulation of phase-to-ground clearances during insulator replacement technology, in case of several tower types and insulator types used in the Hungarian transmission grid. Another purpose of this article is to examine the possibility of reducing minimal approach distances, such as by the application of portable protective air gap (PPAG).","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908450","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: 4

Impulse Voltage-based Test Method for Identifying the Stator Insulation Component with PD Activity for Low Voltage AC Motors 识别低压交流电动机定子绝缘元件的脉冲电压试验方法

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046584

Sang Bin Lee, Alireza Naeini, S. Jayaram, G. Stone, M. Šašić

引用次数: 2

Towards a Hybrid Power Cable Health Index for Medium Voltage Power Cable Condition Monitoring 用于中压电缆状态监测的混合电缆健康指标研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046550

J. Aizpurua, B. Stewart, S. Mcarthur, Nitin Jaiware, Martin Kearns

引用次数: 5

Effect of Vibration on Surface Discharge of Epoxy Resin 振动对环氧树脂表面放电的影响

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046574

Siyun Wang, M. Ren, Changjie Xia, Tianxin Zhuang, Shujing Yang, Xiaojing Dou

引用次数: 0

Gas-Insulated High Temperature Superconducting Coaxial Dipole for MVDC Power Systems MVDC电力系统用气体绝缘高温超导同轴偶极子

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046542

P. Cheetham, Chanyeop Park, S. Satyanarayana, C. Kim, L. Graber, S. Pamidi

引用次数: 1