2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第2页

The effect of material interfaces on electrical tree growth and breakdown time of epoxy resin 材料界面对环氧树脂电树生长和击穿时间的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6747070

M. Pattouras, A. Tzimas, S. Rowland

引用次数: 3

Modeling of the permittivity of epoxy nanocomposites 环氧纳米复合材料介电常数的建模

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6747431

T. Andritsch, R. Kochetov, P. Morshuis, J. Smit, A. Vaughan

{"title":"Modeling of the permittivity of epoxy nanocomposites","authors":"T. Andritsch, R. Kochetov, P. Morshuis, J. Smit, A. Vaughan","doi":"10.1109/CEIDP.2013.6747431","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747431","url":null,"abstract":"Polymer nanocomposites exhibit a number of desirable dielectric properties, like increased resistance to partial discharge, electrical treeing, dc breakdown strength, or a decreased intake of space charges. The permittivity is one of the properties at which a direct impact from the introduction of nanoparticles can be observed. Many applications would benefit from the ability to tailor the permittivity of their insulation. Both a reduction, for e.g. cable systems and GIS spacers, and an increase, for e.g. capacitors, would be desirable if they can be controlled and exploited accordingly. Hence there is an interest in predicting how a filler material would alter the permittivity. There are two main groups of theoretical approaches to the problem of composite permittivities. Effective medium theories, which utilize average fields or polarizabilities and induced dipole moments, and integral methods, which use low concentration formulae and integrate them to higher concentration. When modeling the permittivity of nanocomposites both methods struggle to deliver satisfying results. This exploratory work tries to make estimations about the bulk permittivity by taking into account the host-polymer interface, to which many of the astounding properties of polymer nanocomposites are ascribed. As a starting point for the modeling, nanocomposites are considered which are based on bisphenol-A type epoxy resin with aluminum oxide and magnesium oxide nanofiller. The selected filler materials are spherical or quasi-spherical, to minimize the influence of additional parameters like the aspect ratio.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"98 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115506667","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: 12

Tracking copper sulfide formation in corrosive transformer oil 跟踪腐蚀变压器油中硫化铜的形成

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6747071

P. Amaro, M. Facciotti, A. Holt, J. Pilgrim, P. Lewin, R. C. Brown, G. Wilson, P. Jarman

{"title":"Tracking copper sulfide formation in corrosive transformer oil","authors":"P. Amaro, M. Facciotti, A. Holt, J. Pilgrim, P. Lewin, R. C. Brown, G. Wilson, P. Jarman","doi":"10.1109/CEIDP.2013.6747071","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747071","url":null,"abstract":"Corrosive sulfur in the last decade has been recognized as a major risk to high voltage transformers. An initial study undertaken by CIGRE on copper sulfide in transformer insulation investigated possible sources, i.e. Dibenzyl Disulfide (DBDS), it also looked at possible mitigating techniques, i.e. passivation, environmental influences, i.e. temperature, and improvement to oil corrosion standards, i.e. EN 62535. Although there was significant volume of research undertaken the high voltage industry still felt there is a lack of understanding in the process of copper sulfide formation and long-term effects of mitigation techniques. Hence a new CIGRE transformer working group, A2.40, was created. The identification of techniques with the ability to track the mechanism of copper sulfide (Cu2S) formation is fundamental to the current research objectives. The technique suggested in this paper involves the use of X-ray fluorescence (XRF), which is used for elemental analysis, to track the quantity of sulfur in the oil. As the deposits of Cu2S form in the conductors and paper insulation the amount of sulfur in the oil decreases. By using a series of laboratory experiments is possible to investigate how the rate of formation of Cu2S changes with time, suggesting that there is an initial chemical reaction needed for the Cu2S deposits to form. Scanning Electron Microscopy with Energy-dispersive X-ray spectroscopy (SEM-EDX) has been used to investigate the surface of copper at several different stages of the copper sulfide formation. By manipulating variables, i.e. temperature, it is possible to map their influence and provide a more precise risk assessment of transformer with corrosive oil to electrical utility companies. The experimental results suggest the possibility of developing a method to indirectly measure Cu2S deposition on conductors and insulation paper by tracking sulfur concentration changes in the transformer oil.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132151568","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: 14

XPS study on direct detection of passivator Irgamet 39™ on copper surfaces aged in insulating mineral oil 绝缘矿物油老化铜表面钝化剂Irgamet 39™的XPS直接检测研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6747439

M. Facciotti, A. Holt, A. Amaro, R. C. Brown, P. Lewin, G. Wilson, P. Jarman

{"title":"XPS study on direct detection of passivator Irgamet 39™ on copper surfaces aged in insulating mineral oil","authors":"M. Facciotti, A. Holt, A. Amaro, R. C. Brown, P. Lewin, G. Wilson, P. Jarman","doi":"10.1109/CEIDP.2013.6747439","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747439","url":null,"abstract":"Corrosion of copper conductors in mineral oil insulated power transformers is a well-known problem in electrical power management and distribution worldwide. Recently, some corrosive compounds containing sulfur (e.g. DBDS, dibenzyl disulfide) have been identified to play an important role in this process. A common strategy to limit corrosion, either as precaution or remedy, is the addition of a passivator (Irgamet 39™, I39™) in the oil, with a recommended concentration of 100 ppm to protect the surface of conductors from chemical attack from corrosive oil components. In this study, samples of naturally non-corrosive oil with different concentrations of I39™ are used to treat copper surfaces that are aged under inert atmosphere and analyzed with X-ray Photoelectron (XPS) to assess directly the effective amount of passivator covering the surface of metal and its dependence on the original concentration in oil. The main aim is, therefore, to determine the effect of the concentration of I39™ originally in oil on the effective surface coverage of copper conductors to observe its distribution and to verify the recommended passivator concentration to be used.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126484264","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

An electro-optical measurement on electric field of insulator surface under HV pulse in vacuum 真空高压脉冲作用下绝缘子表面电场的电光测量

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748210

W. Liu, Y. Fu, X. Zou, X. Wang

引用次数: 0

Study on parameters design and corona characteristics test equivalent of grading rings for 1000kV UHV AC compact transmission line 1000kV特高压交流紧凑型输电线路分级环参数设计及电晕特性试验当量研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748236

Daochun Huang, Zheng Zheng, Z. Huang, Xiongjie Xie, J. Ruan, F. Huo

{"title":"Study on parameters design and corona characteristics test equivalent of grading rings for 1000kV UHV AC compact transmission line","authors":"Daochun Huang, Zheng Zheng, Z. Huang, Xiongjie Xie, J. Ruan, F. Huo","doi":"10.1109/CEIDP.2013.6748236","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748236","url":null,"abstract":"In order to give reference for the study of 1000kV ultra high voltage (UHV) AC compact transmission line grading ring design and corona characteristics, based on the 1000kV UHV AC compact transmission line pre-designed parameters, 3D electrostatic field finite element numerical analysis whole model to calculate the electric field distribution of composite insulator and grading ring was built, and the influence of pipe diameter, ring diameter, installation position and small grading ring to the maximum electric field strength on the surface of the grading ring was analyzed. Based on the numerical analysis results, four kinds of grading rings with different parameters were preliminary selected for true type test. 3D electrostatic field finite element model according to the corona test arrangement was built, the electric field of four kinds of grading rings were analyzed and compared with the whole model, and the correction coefficients were obtained between the whole model and corona testing simulation model. The research results can be a reference for the optimization design and following corona characteristics test parameters correction for 1000kV AC compact transmission line grading rings.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 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":"121116604","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

Study on improving the operation performance of composite insulator by interpolation electrode structure 利用插补电极结构提高复合绝缘子工作性能的研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748163

Sen Wang, Bo Niu, Li-zhu He, Hua Hui, Zhizhong Li, Bin Zhu

{"title":"Study on improving the operation performance of composite insulator by interpolation electrode structure","authors":"Sen Wang, Bo Niu, Li-zhu He, Hua Hui, Zhizhong Li, Bin Zhu","doi":"10.1109/CEIDP.2013.6748163","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748163","url":null,"abstract":"In power grid, higher is the voltage level, longer is the composite insulator string, uneven is the potential distribution, especially the sheds near the conductor, its withstand voltage is several times higher than other sheds. For the electric field strength of composite insulator at high end is high, it is easy to produce corona which resulted in insulator degradation, life shortening and acid corrosion intensified by electric corrosion. A new interpolation electrode structure equipped with optimized grading ring is designed and developed to effectively improve potential distribution of composite insulator. Based on fuzzy clustering analysis method, the test data of 330kV composite insulator with different structures is analyzed and modeled. Field strength distribution function of composite insulator with different structure has obtained. Through field strength analysis, it is proposed to introduce the potential into 1~2 sheds of composite insulator core rod for reducing field strength at high end. Based on above method, a new interpolation electrode structure is designed; optimal design is conducted to grading ring of interpolation electrode structure through finite element algorithm simulation. The product has passed all type tests. Field strength and potential distribution of insulator shed are measured by fiber optic field strength measuring instrument. It is shown that the potential distribution of composite insulator has been improved greatly. The product has been applied and operated on a 330kV transmission line in Shaanxi Province for 3 years, and is under good operation condition.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 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":"124701511","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

Transition of partial discharge inception voltage under high humidity for enameled rectangular wires 高湿条件下漆包线局部放电起始电压的过渡

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748317

T. Wakimoto, H. Kojima, M. Hanai, N. Hayakawa

{"title":"Transition of partial discharge inception voltage under high humidity for enameled rectangular wires","authors":"T. Wakimoto, H. Kojima, M. Hanai, N. Hayakawa","doi":"10.1109/CEIDP.2013.6748317","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748317","url":null,"abstract":"In recent years, the miniaturization and greater power output of motors for EVs and HEVs have led to the higher drive voltages and the increased adoption of rectangular wire in coils (higher volume ratio). In order to ensure that the motor is electrically insulated, it is necessary to restrict partial discharges between coil wires, and to do this, it is important to reduce the potential difference between wires resulting from the operation of the inverter and to ensure that the coil wire has the proper coating thickness. However, the measurement of partial discharges between wires results in variability in the measured values depending on the environment and methods, which is a problem for the stringently controlled design of motor insulation. To clarify the factors affecting the partial discharge inception voltage (PDIV) between wires as well as the mechanism, the effect of ambient humidity, pre-discharge conditions on the PDIV between wires was analyzed using rectangular wire with a coating thickness of 40 μm and 160 μm. As a result, it was confirmed that when a pre-discharge is performed in a high-humidity environment, transient characteristics were displayed in which PDIV momentarily decreased and then increased. We performed discharge observations and electric field analysis. The results showed that in high-humidity environments, the pre-discharge causes moisture to adhere to the coating surface, resulting in the increase in surface conductivity, which influences the electric field strength in the air gap.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"26 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":"124878066","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: 3

A preliminary study on the impact of environment to the heat of insulator 环境对绝缘子热影响的初步研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748271

Ruihai Li, Kangtai Xu, Fuzeng Zhang, Zhuo Xu, Y. Tu, Bo Gong

引用次数: 2

Synthesis of polyacene quinone radical polymers with controllable conductivity and their electrorheological behavior 具有可控电导率的聚苯二烯醌自由基聚合物的合成及其电流变行为

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748281

Baoxiang Wang, Lili Ma, C. Hao, Q. Lei

引用次数: 0