2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第10页

Study on the influencing factors of natural degradation of liquid silicone rubber used for external insulation 外保温用液态硅橡胶自然降解的影响因素研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748285

Chen Can, Yifeng Lin, Zhidong Jia, Li Tong, L. Hai, Wang Xilin

{"title":"Study on the influencing factors of natural degradation of liquid silicone rubber used for external insulation","authors":"Chen Can, Yifeng Lin, Zhidong Jia, Li Tong, L. Hai, Wang Xilin","doi":"10.1109/CEIDP.2013.6748285","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748285","url":null,"abstract":"In recent years, liquid silicone rubber (LSR) has been widely used in the external insulation field. However, further study on the degradation mechanism and the influencing factors of liquid silicone rubber is still required. Especially when it is used in southern parts of China, of which the high temperature and humidity environment could accelerate the degradation process. It is reported that cracking and chalking phenomena were observed on the liquid silicone rubber sheath of PT and CT. In this paper, a series of ageing experiments were designed and carried out to test the performance of liquid silicone rubber when exposed to factors such as high temperature, high humidity, sun exposure and corona discharge. After the experiments, characteristics such as hardness, hydrophobicity, glossiness and mechanical properties were tested and SEM was used to study the change of micro structure. It is concluded that high temperature, high humidity and sun exposure play significant roles in the degradation of liquid silicone rubber, which could lead to the rise of hardness, loss of hydrophobicity, decrease of glossiness and surface cracking. The results also show that the change of mechanical properties of liquid silicone rubber were tiny.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"15 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":"122265207","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: 7

Influence of pressure and humidity on the amplitude — Phase distribution of AC corona pulse 压力和湿度对交流电晕脉冲幅相分布的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748131

Xiaobo Meng, Jianfeng Hui, H. Mei, Liming Wang, Z. Guan

{"title":"Influence of pressure and humidity on the amplitude — Phase distribution of AC corona pulse","authors":"Xiaobo Meng, Jianfeng Hui, H. Mei, Liming Wang, Z. Guan","doi":"10.1109/CEIDP.2013.6748131","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748131","url":null,"abstract":"Corona problem is one of the important problems in the design and operation of the transmission lines. The corona discharge of high voltage transmission lines, results in power loss, radio interference and audible noise, which become more serious at the high altitudes. Besides, it has a great influence on the safe and robust operation of high voltage apparatus. A study carried out in the chamber made of perspex, was that AC corona characteristics varied with air pressure and humidity through the rod plane electrodes. The experiments showed that the inception voltage of AC corona was reduced with air pressure decreasing or humidity increasing. Meanwhile, the amplitude - phase distribution of AC corona pulse was displayed under different air pressure and humidity. Under low humidity (RH=25% or 55%), the streamer pulses only appear in the rise edge of positive half cycle, and the number of streamer pulses is few. The negative streamer pulses occur around the peak value of the negative half cycle. The streamer pulses appear in the rise and fall edge of positive half cycle at the same time with high humidity (RH=85%), and the number of streamer pulses increases obviously. When the humidity is higher (RH=95%), the streamer pulses appear only in the fall edge of positive half cycle. Furthermore, the negative streamer pulses around the peak of the negative half cycle also disappear.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"148 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":"127153535","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

Influence of moisture and oxygen on aging of oil-paper insulation 水分和氧气对油纸绝缘老化的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747086

Yantao Li, Guangning Wu, Wei Li, Yunguang Cui, B. Gao

引用次数: 4

Influence of moisture absorption on space charge property of MgO/LDPE nanocomposite 吸湿对MgO/LDPE纳米复合材料空间电荷性能的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748257

J. Yang, X. Wang, C. Zheng, H. Zhao, Q. Lei

引用次数: 1

Study on properties of BF/EP-PU composite BF/EP-PU复合材料性能研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748272

Yu-fei Chen, Jialin Sun, T. Feng, Liping Wang, Zuoyu Wu

引用次数: 0

Measurement of pollution level of 66 kV transmission line insulators 66kv输电线路绝缘子污染等级的测定

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748144

M. Salam, S. Ang, B. T. Ong, O. A. Malik, W. Voon, M. Alinurrezan

{"title":"Measurement of pollution level of 66 kV transmission line insulators","authors":"M. Salam, S. Ang, B. T. Ong, O. A. Malik, W. Voon, M. Alinurrezan","doi":"10.1109/CEIDP.2013.6748144","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748144","url":null,"abstract":"The presence of unwanted constituent on insulator surface of transmission tower plays an important ignition property for the likelihood of occurrence of flashover. In this paper, the pollution level of two aged insulators namely the longrod silicon rubber and the cap-and-pin glass insulators are measured. The results from the measurement shows that the Equivalent Salt Deposit Density (ESDD) of the cap-and-pin glass insulator, particularly near the pin is found to be 0.169 mg/cm2 while the composition over the cap surface is 0.136 mg/cm2. For the case of longrod silicon rubber insulator, the ESDD for both the pin and the cap are found to be 0.063 mg/cm2 and 0.016 mg/cm2 respectively. The outcomes from the ESDD measurements suggest that the cap-and-pin glass insulator string is severely contaminated with salt spray as compared to the longrod silicon rubber. Furthermore, a mathematical model of ESDD expressed in terms of salinity and temperature for both insulators is derived from multivariable regression method. The coefficients for both the cap-and-pin glass and longrod silicon rubber insulator are found to be 0.9984 and 0.9867 respectively.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1993 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":"131004833","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

Partial discharge and breakdown behavior of enamel-insulated copper conductors in carbon powder 碳粉中搪瓷绝缘铜导体的局部放电和击穿行为

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747098

D. Taylor, H. Hiziroglu, P. H. Foss

引用次数: 1

Temperature effect on space charge dynamics in multi-layer insulation Fluorinated Ethylene Propylene (FEP) Low Density Polyethylene (LDPE) 多层绝缘氟化乙丙烯(FEP)低密度聚乙烯(LDPE)空间电荷动力学的温度效应

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747096

F. Rogti, M. Ferhat

引用次数: 1

Study on the dielectric response characteristic of XLPE cables 交联聚乙烯电缆介电响应特性研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748306

Gang Ye, Hua Li, Fuchang Lin, Xiaogang Wu, Zeqi Huang, Qin Zhang, Jingwei Cai

引用次数: 2

The effects of Si-doping on the properties of CaCu3Ti4O12 ceramics si掺杂对ccu3ti4o12陶瓷性能的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748227

Jinqiang He, Hui Wang, Chunjiang Lin, Jiajun Lin, Shengtao Li

{"title":"The effects of Si-doping on the properties of CaCu3Ti4O12 ceramics","authors":"Jinqiang He, Hui Wang, Chunjiang Lin, Jiajun Lin, Shengtao Li","doi":"10.1109/CEIDP.2013.6748227","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748227","url":null,"abstract":"CaCu3Ti4O12 (CCTO) ceramics as a dielectric material are of potential applications in capacitors and memory devices, however, how to further improve the dielectric properties of CCTO ceramics is still a challenge. The dielectric behavior of this material can be manipulated via the modification in composition, and Si as a glass phase should have an impact on the properties of CCTO ceramics, this work investigated the effects of Si-doping on CaCu3Ti4O12 with the aim of improving dielectric characteristics. CaCu3Ti4O12 ceramics of various Si-doping concentrations were synthesized by solid state reaction method at 1050 C. The microstructure and the dielectric properties of Si-doped and undoped CaCu3Ti4O12 were studied. It is found that the added silicon can be incorporated into the structure of CaCu3Ti4O12, a certain amount of Si-doping would facilitate the grain growth, promote the precipitation of intergranular phase, and improve the compactness and homogeneity of CaCu3Ti4O12 ceramics. Si-doped CaCu3Ti4O12 samples show significantly higher dielectric constant, accompanied by larger dielectric loss. The temperature dependence of dielectric permittivity ε\" for various frequencies shows three successive sets of peaks attributed to intrinsic relaxation polarization processes, suggesting that Si-doping has little influence on the relaxation mechanism of CaCu3Ti4O12 ceramics.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"75 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":"134543273","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