2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第9页

Influence of gas heating and product molecules on discharge characteristics in dry-air-fed ozonizer 气体加热和产物分子对干式臭氧发生器排放特性的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747067

Yoichi Inada, K. Kijima, Takao Matsumoto, Y. Izawa, K. Nishijima

{"title":"Influence of gas heating and product molecules on discharge characteristics in dry-air-fed ozonizer","authors":"Yoichi Inada, K. Kijima, Takao Matsumoto, Y. Izawa, K. Nishijima","doi":"10.1109/CEIDP.2013.6747067","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747067","url":null,"abstract":"Influences of gas heating and product molecules on discharge characteristics in dry-air-fed ozonizer was investigated. Especially, the dependence of gas temperature in streamer channel on occurrence frequency of streamer discharge was investigated in detail. In the experiment, repetitive positive or negative impulse streamer was generated respectively between needle-plane electrodes in synthetic air at atmospheric pressure. The repetition rate of the applied pulse voltage was controlled from 0.1 to 7.0 kilo-pulse/sec (kpps). The temperature of streamer channel was estimated from the emission spectrum of N2 2nd positive system band (0-0). As a result, the gas temperature increased with increasing the pulse repetition rate in both polarities. In the case of positive polarity, the gas temperature increased from 341 to 383 K in response to the increase of repetition rate (0.1 to 6.0 kpps). Eventually, sparkover occurred at 7.0 kpps due to the increase of reduced electric field (E/N) caused by gas heating. The product ozone concentration was saturated with increasing the pulse repetition.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122767657","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

Influences of wind velocities on the contamination behavior of two outer-rib type and under-rib type outdoor insulators 风速对外肋式和下肋式两种室外绝缘子沾污特性的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748128

Xiaolei Yang, Yawei Li, Qiaogen Zhang, Hao Yang, Chunhui Gu, Jun Zhou, Xinzhe Yu

引用次数: 1

Investigation on breakdown properties of low-density polyethylene / nano-ZnO composites 低密度聚乙烯/纳米zno复合材料击穿性能研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747463

Yujia Cheng, N. Guo, Ru Wang, Xiaohong Zhang

引用次数: 4

Identification of contaminating particle geometry in a co-axial configuration using trichel pulse characteristics 利用三头脉冲特性在同轴结构中识别污染粒子的几何形状

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747100

M. E. El Bahy, S. Ward, R. Morsi, M. Badawi

{"title":"Identification of contaminating particle geometry in a co-axial configuration using trichel pulse characteristics","authors":"M. E. El Bahy, S. Ward, R. Morsi, M. Badawi","doi":"10.1109/CEIDP.2013.6747100","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747100","url":null,"abstract":"A method is presented for detecting and identifying the shape and size of a contaminating metallic particle in gas insulated system (GIS). A fixed particle-initiated negative corona in air insulated co-axial cylindrical configuration is investigated at a voltage slightly above the corona onset level. The characteristics of the negative corona pulses (Trichel pulses) are calculated by mathematical modeling the process taking place during the negative corona discharge. An experimental set-up is built up to measure the Trichel pulse characteristics and to check the accuracy of the present calculation. The calculated values of corona Trichel pulse amplitudes and repetition rates agree well with the measured values. So, the Trichel pulse characteristics are calculated for different particle sizes and shapes. These data of pulses are used as a bias for designing and training the artificial neural network technique (ANN). For earlier detection of insulation defect, the Trichel pulse characteristics are measured and then given as an input data to the trained ANN. Then, we could identify the particle shape and size.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129389703","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

Discharge characteristics of streamer in liquid dielectric under lightning impulse voltage 雷电冲击电压下液体介质中流光的放电特性

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748197

Zheng Dianchun, W. Zhengwei, Cheng Chuntian, Y. Weiguo

{"title":"Discharge characteristics of streamer in liquid dielectric under lightning impulse voltage","authors":"Zheng Dianchun, W. Zhengwei, Cheng Chuntian, Y. Weiguo","doi":"10.1109/CEIDP.2013.6748197","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748197","url":null,"abstract":"Liquid dielectrics are widely used as insulating medium in the electrical insulation system, and often withstand various impulse voltage occurrences of discharge. To understand the physical behaviors of discharge phenomena in dielectric liquid, adopting needle-sphere electrode geometry in this paper, the dynamic state of streamer and the dynamic characteristics of charged particles in liquid dielectric are investigated under lightning impulse voltage. The change process of positive ions, negative ions, and electrons with the formation and development of the streamer are described by two-dimensional continuity equations, and coupled with the Poisson's equation described the electric field strength. The research results show that, during the process of impulse rise, the movement of the free charge generated by liquid molecule ionization only near the sharp needle electrode, the streamer generated by migration of the electric field propagates towards liquid-gap slowly as well. However, the streamer velocity increases an order of magnitude when a critical voltage is reached, then the streamer will accelerate development towards sphere electrode. We also find that in liquid dielectric at the same peak voltage, rise times influence the shape and velocity of the streamers. According to these conclusions enable ones easily understand breakdown mechanism of the liquid dielectrics that are reasonably applied to power system fields.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129775746","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

Insulation condition diagnosis of transformer with multi-peak polarization spectrum 用多峰极化谱诊断变压器绝缘状态

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748214

Z. Tao, Liu Xiaoqin, Ma Fei-lin, Sun Liuxue

引用次数: 2

Space charge behavior of epoxy resin at high temperature 环氧树脂高温下的空间电荷行为

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748204

X. Ning, Z. Xiang, Peng Liu, Hua Feng, Zongren Peng

{"title":"Space charge behavior of epoxy resin at high temperature","authors":"X. Ning, Z. Xiang, Peng Liu, Hua Feng, Zongren Peng","doi":"10.1109/CEIDP.2013.6748204","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748204","url":null,"abstract":"Epoxy resin has been widely used in dry-type insulation application, such as dry-type bushings. This study focuses on the temperature effect on the space charge characteristics and dielectric properties of epoxy resin. The space charge distribution measurement has been performed at different electric fields and temperatures by the PEA method, ranging from 2kV/mm to 60kV/mm at 291K, 313K and 343K respectively. The dielectric parameters including relative permittivity, dielectric loss factor, have also been measured in the frequency range 10-1Hz~106Hz at temperatures from 173K to 473K. The a-relaxation in the high temperature region and the weaker ß-relaxation in the low temperature region can be detected. Both temperature dependence of the a-relaxation rate and the dc conductivity show the Vogel-Fulcher-Tammann law. The space charge measurement results show that the temperature plays an important role on the charge transport and storage in epoxy resin materials. The threshold for space charge accumulation decreases significantly with increasing temperature, while the amount of injected homocharge goes up. These results would be benefit for the structure optimization of bushings which is a critical component of the dry-type converter transformer used in the ultra-high voltage direct current power transmission system.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124620903","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: 8

The DC breakdown of mineral insulating oil and oil-pressboard 矿物绝缘油和油压板的直流击穿

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748126

Liu Huaqiang, Zhao Yaning, Zhong Lisheng, Y. Qinxue, Li Xu, Liu Guangqi, S. Mori, S. Yamada

{"title":"The DC breakdown of mineral insulating oil and oil-pressboard","authors":"Liu Huaqiang, Zhao Yaning, Zhong Lisheng, Y. Qinxue, Li Xu, Liu Guangqi, S. Mori, S. Yamada","doi":"10.1109/CEIDP.2013.6748126","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748126","url":null,"abstract":"AC-DC converter transformer is one of the most important equipments in the high-voltage D.C. transmission system. And the mineral insulating oil and pressboard immersing in oil are important insulation dielectrics used in AC-DC converter transformers. Thus, it is very significant to understand the dielectric properties of the mineral insulating oil and oil-pressboard. In this paper, the DC breakdown of two new mineral insulating oils and a pressboard immersing in these oils under different temperature has been systematically investigated. The oil and oil-pressboard was degassed and dehydrated before the test. In the testing progress, the test device of breakdown strength was protected by nitrogen and isolated from outside. The breakdown strength of two kinds of mineral insulating oil were tested at five temperatures with the range of 25-80°C, and the breakdown strength of pressboard immersed in both oil were also tested at three temperature with the same range. From the results, it can be obtained that the breakdown strength of oil increased with the increase of temperature, whereas the oil-pressboard showed opposite tendency. This paper enhanced the understanding of the breakdown strength for mineral insulating oil and pressboard immersed in oil, provided the theoretical and test basis to expand the engineering application of this mineral insulating oil and pressboard.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121587654","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

DP and dielectric characteristic research of polymer materials under high temperature in mineral oil 高分子材料在矿物油高温下的DP和介电特性研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748162

Y. Kai, Wang Wei, Lin FuPing, Du Jiazhen, Lu Jian, Z. Kai

{"title":"DP and dielectric characteristic research of polymer materials under high temperature in mineral oil","authors":"Y. Kai, Wang Wei, Lin FuPing, Du Jiazhen, Lu Jian, Z. Kai","doi":"10.1109/CEIDP.2013.6748162","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748162","url":null,"abstract":"Power transformer is one of the most important power transmission equipments in the power system. The reliability and operational efficiency of power system is directly related to its performance and quality. The insulation paper used in oil-immersed transformer cannot resist high temperature, and the significant difference of dielectric constant between the insulation paper and the transformer oil will lead to the unevenness of electric field. These two shortcomings limit the capacity and lifetime of transformer. So, it is very significant to explore new polymer materials that can replace insulating paper to improve electric field distribution and insulation structure. In this paper, two kinds of high-temperature resistance polymer materials-Polycarbonate (PC) and Polyester (PET) are chosen as the candidates to comparison with paper. They are put in the transformer oil with electrical-thermal aging for 300 days under 90°C, 110°C and 130°C respectively. The tests of the dielectric constant and degree of polymerization (DP) are studied to estimate whether they can be used in oil-immersed transformer.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115797817","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 mechanical and electrical characteristics of gossans electrochemical corrosion ceramic insulators on DC transmission line 直流输电线路绢丝电化学腐蚀陶瓷绝缘子的机电特性研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748132

Ling Luo, Fuzeng Zhang, Yining Wang, H. Mei, Y. Liao, Liming Wang, Z. Guan, Licheng Li

{"title":"Study on mechanical and electrical characteristics of gossans electrochemical corrosion ceramic insulators on DC transmission line","authors":"Ling Luo, Fuzeng Zhang, Yining Wang, H. Mei, Y. Liao, Liming Wang, Z. Guan, Licheng Li","doi":"10.1109/CEIDP.2013.6748132","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748132","url":null,"abstract":"Chusui dc transmission line is the world's first ±800kV transmission line in China. 2011 March, gossans of ceramic insulators on ±800kV Chusui dc transmission line appeared electrochemical corrosion at Qujing region in Yunnan province. The corrosion phenomenon concentrated in V-string insulators on negative polarity side. This article describes the basic electrochemical corrosion situation of ceramic insulators. In order to analyze the mechanical and electrical characteristics of electrochemical corrosion ceramic insulators of ±800kV Chusui transmission line, insulation resistance test, mechanical and electrical load destructive test and natural contamination flashover test had been done in National Engineering Laboratory for Ultra High Voltage Engineering Technology (Kunming). Test results indicate that gossans' electrochemical corrosion problem didn't obviously decrease insulators' mechanical and electrical characteristic currently. The electrochemical corrosion insulators still satisfy transmission line's operation requirements. Meanwhile, contamination degree of electrochemical corrosion insulators whose surface is divided into three parts had been measured respectively. Measurement results indicate the contamination severity of electrochemical corrosion products accumulated area on ceramic insulators' surface is much heavier than other area, which indicates that ceramic insulators' gossans electromechanical corrosion would aggravate contamination accumulation. It is necessary to take measures to suppress ceramic insulators gossans electrochemical corrosion.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"354 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120958271","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