Conference Record of the 2006 IEEE International Symposium on Electrical Insulation最新文献_第10页

Case study of ANSI standard delta-wye distribution transformer ANSI标准三角型配电变压器实例分析

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665293

M. T. Al-Hajri

引用次数: 0

A cold fog test method of composite insulators 复合绝缘子的冷雾试验方法

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665290

Linjie Zhao, Chengrong Li, Jisha Yao, Shuqi Zhang, Jun Xiong

{"title":"A cold fog test method of composite insulators","authors":"Linjie Zhao, Chengrong Li, Jisha Yao, Shuqi Zhang, Jun Xiong","doi":"10.1109/ELINSL.2006.1665290","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665290","url":null,"abstract":"In this paper, based on a unique environmental test chamber with refrigerating system, fog generator and AC high voltage supplier, a cold fog test method was developed to evaluate the contamination flashover performance of silicone rubber composite insulators under the winter fog condition. The main characteristics of this method are that the temperature of the chamber is controlled to cycle in the range of -1 degC to 1 degC with the period of about 50 minutes. An AC test voltage is applied to the sample and raised to flashover at the rate of 3 kV/s when temperature reaches 2 degC in a cycle. The test is continued until the flashover voltage at a cycle is higher than the previous one. A type of short-string composite insulators was investigated using this cold fog method and the conventional steam fog method, respectively. NaCI and kieselguhr were chosen as pollutants and the pollution degree was 0.2/2.0 mg/cm2. For the samples with different initial hydrophobicity, the test results show that the flashover voltages in the cold fog test are 13%-26% lower than that in the steam fog test. It confirms that the winter fog performance of composite insulators should be investigated using the cold fog method at ambient temperatures near 0 degC","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125888355","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

Mineral insulating oils; functional requirements, specifications and production 矿物绝缘油;功能要求、规格及生产

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665259

M. Eklund

引用次数: 13

Research on electric potential distributions of composite insulators and glass insulators by numerical simulation 复合绝缘子与玻璃绝缘子电势分布的数值模拟研究

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665292

Fan Yadong, Wen Xishan, D. Wei, Lin Xiaoping

引用次数: 5

Effect of harmonics on transformers loss of life 谐波对变压器寿命损耗的影响

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665344

A. Elmoudi, M. Lehtonen, H. Nordman

引用次数: 83

Impact of rheological properties on conductor shield convolutions in power cables from a continuous vulcanization process 连续硫化过程中流变性能对电力电缆导体屏蔽圈的影响

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665286

S. Han, S. Wasserman

引用次数: 0

Combined high frequency and high voltage insulation system investigation 结合高频高压绝缘系统的研究

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665352

M. Nagel, C. Herold, T. Wenzel, T. Leibfried

{"title":"Combined high frequency and high voltage insulation system investigation","authors":"M. Nagel, C. Herold, T. Wenzel, T. Leibfried","doi":"10.1109/ELINSL.2006.1665352","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665352","url":null,"abstract":"Due to the increasing extension of power grids and decentralization of power generation, the need for control and compensation is more and more increasing. The intensive use of modern power electronics in FACTS elements can provide a feasible solution. Especially STATCOM and UPFC, for their versatile application can be the method of choice. Voltage sourced converters with IGBTs are used for compensation, providing both leading and lagging power. Filters need to be applied to block the high frequencies, generated by the large slew-rate of the converter pulses, from the connecting transformers. Their impact on the oil-cellulose insulation system as well as on most of the other dielectric insulation materials is unknown. This includes the breakdown voltage at higher frequencies as well as possible influences on accelerated aging. The first step in a breakdown investigation of any AC insulation system at frequencies beyond 10 kHz is the generation of a test voltage. Derived by the strength of transformerboard at 50 Hz, an amplitude of 100 kV needs to be provided to exceed its insulation capabilities. Based on investigations concerning enameled wires, where the dielectric strength dropped by factor 10, similar eventualities need to be taken into account in the design. A resonance principle was chosen to generate the test voltage of frequencies between 10 kHz and 250 kHz with an amplitude up to 100 kV. Major challenge in the design is a reduction of losses in the circuit, caused either by resistivity or by corona discharge. Insulation failure, other than at the specimen, obviously has to be excluded as well. With the resulting voltage source, miscellaneous dielectric materials will be tested for breakdown and aging, starting in this investigation with oil and its combinations with cellulose","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129447608","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: 9

Partial discharge impulse behaviour in different insulating media 不同绝缘介质中的局部放电脉冲特性

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665318

R. Schwarz, M. Muhr, S. Jaufer

引用次数: 1

Simulation of high field resistive and absorption currents in semicrystalline polymer films 半晶聚合物薄膜中高场电阻和吸收电流的模拟

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665332

Chunchuan Xu, Z. Zheng, S. Boggs

引用次数: 5

The influence of the stress time duration on the partial discharge behavior in cast resin insulation 应力时间对浇铸树脂绝缘局部放电行为的影响

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665316

R. Victoria, E. Gockenbach, H. Borsi

{"title":"The influence of the stress time duration on the partial discharge behavior in cast resin insulation","authors":"R. Victoria, E. Gockenbach, H. Borsi","doi":"10.1109/ELINSL.2006.1665316","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665316","url":null,"abstract":"It is well known that thermal and electrical stresses have a strong influence on the degradation of insulation, but the effect of the stress duration is not yet well analysed. On this account thermal, electrical, and a combination of thermo-electrical stresses were applied to a number of cast-resin samples, and their effects were evaluated via partial discharge measurements. Stress duration as well as time without stress was varied. This information will be used in a statistical method to recognise the influence of the duration of the applied stress on the partial discharge activity of every sample. The statistical method is the analysis of variance (ANOVA), which is useful when the frequency distribution of the measurements is a so-called normal distribution. All measurements were carried out following this distribution and thus the reliability of such tests is only dependent on the linear behaviour of the following variables: partial discharge inception and extinction voltage, number of discharge impulses, sum of the charges of all impulses, and average charge per impulse. The other variables are the stress duration and the time without stress. In order to recognise variations which only correspond to the same effect, tests must be ordered in groups with the same characteristics. Tests must also be performed in continuous and repetitive cycles under stress in order to avoid undesirable effects. The results of these experiments may form the basis for the identification of a relationship between one or more partial discharge parameters and the stress duration","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130499017","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