2012 International Conference on High Voltage Engineering and Application最新文献_第3页

Extraction method for frequency domain characteristic parameters of oil impregnated insulation paper 浸渍绝缘纸频域特征参数提取方法

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357065

Chaoliang Qi, Lijun Yang, Wei Li, J. Hao, Zhiqin Ma, Jinjun Bai

{"title":"Extraction method for frequency domain characteristic parameters of oil impregnated insulation paper","authors":"Chaoliang Qi, Lijun Yang, Wei Li, J. Hao, Zhiqin Ma, Jinjun Bai","doi":"10.1109/ICHVE.2012.6357065","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357065","url":null,"abstract":"Frequency domain dielectric spectroscopy (FDS) based on dielectric response has been widely used for assessment the state of oil-paper insulation in transformers. However, domestic and foreign researches are mostly focused on qualitative analyzing the changing behavior of frequency domain spectrum curve for different insulation conditions, such as different temperature, moisture and aging status. It is difficult to find a method to extract the frequency-domain characteristic parameters that can be effectively quantified the state of oil-paper insulation. Thus no quantify analyzing the frequency-domain spectrum curve has been made at present. In this paper, firstly, the basic theory of dielectric polarization and a new Cole-Cole model with four polarization processes were introduced. Secondly, FDS measurements on oil impregnated insulation paper at different temperatures were made. Finally, new frequency-domain characteristic parameters for FDS curves were extracted using the new Cole-Cole model. In this way, the physical polarization process could be also clearly understood.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"37 1","pages":"110-114"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80178060","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

Lightning current measurement by differential loop for 110kV transmission line 110kV输电线路雷电电流差动回路测量

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357014

Ling Zhang, Yifeng Li, C. Yao, Y. Mi, Y. Long

{"title":"Lightning current measurement by differential loop for 110kV transmission line","authors":"Ling Zhang, Yifeng Li, C. Yao, Y. Mi, Y. Long","doi":"10.1109/ICHVE.2012.6357014","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357014","url":null,"abstract":"The measurement of lightning current is essential to lightning protection in grid, because only if accurate amplitude and waveform of the lightning current is obtained can the correct lightning protection measures be taken. However, in a high voltage power system, it is almost impossible to measure directly the lightning currents accurately and safely. So aiming at solving the problem of accurate and safe measurement of the lightning current on the overhead transmission lines, the differential loop which has been widely used in the pulse power measurement technique is applied, and a new method of measurement which based on the principle of differential loop can measure the lightning current on overhead transmission lines contactless is used and improved considering the actual running conditions in the 110kV level of transmission line. In this essay, the principle of differential loop for measuring lightning current and the design of the detector are introduced. In laboratory by using the high impulse current generator to simulate the lightning currents, the experiment results show that: for the 1.4m measurement distance, through selecting appropriate size of differential loop and the number of turns, and choosing reasonable shielding, combined with self-integral, the measurement sensor can reflect the waveform and the amplitude of the currents which is produced by the high impulse current generator accurately, and has the advantage of safety, strong anti-interference, well linearity and accuracy.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"29 1","pages":"133-136"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80496108","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

Volume resistivity and PDIV characteristics of polymer materials under electro-thermal aging 电热老化下高分子材料的体积电阻率和PDIV特性

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357073

Shengke Chen, Caipeng Yue, Wei Wang, D. He, Kai Yang

{"title":"Volume resistivity and PDIV characteristics of polymer materials under electro-thermal aging","authors":"Shengke Chen, Caipeng Yue, Wei Wang, D. He, Kai Yang","doi":"10.1109/ICHVE.2012.6357073","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357073","url":null,"abstract":"Traditionally, oil-filled transformers have utilized cellulose paper as primary insulation. However, cellulose insulation is a relatively low temperature material and thermal degradation due to overload conditions and long-term aging can lead to transformer failures, Therefore, it restraints the development of high density power transformers. What's more, since the transformer oil has a relative dielectric constant of 2.2, a material with a high dielectric constant can increase the stress in the oil and cause a breakdown in the transformer. In an effort to find a more suitable insulating material than the cellulose paper for use in an oil-filled transformer, on the basis of fundamental properties of polymer materials, we choose 4 polymer materials with low permittivity and dielectric loss, high electric strength, partial discharge inception voltage and insulation resistance, including polyphenylene sulfide (PPS), polycarbonate (PC), Polytetrafluoroethylene (PTFE) and polyester film (PET). In our experiment, the kraft paper, PC, PET, PPS, PTFE with 0.5mm thick are used. The kraft paper and these four polymer materials are aged in mineral oil for a period of 270 days under 90°C, 110°C and 130°C respectively, simultaneously an electric pre-stressing of 4kV/mm is performed, Then analyze the SEM, the PD inception voltage and volume resistivity of the kraft paper and four polymer materials before and after electro-thermal aging.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"49 1","pages":"190-193"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80610113","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

Electric field measurement and analysis around a line model at different voltage levels 不同电压水平下线模型周围的电场测量与分析

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357005

C. Kocatepe, O. Arikan, C. F. Kumru, A. Erduman, N. Umurkan

引用次数: 5

Application of time-to-failure distributions for the modelling of ageing processes 失效时间分布在老化过程建模中的应用

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357089

R. Włodek

引用次数: 2

The impact of current-carrying bus decentration and inclination on impulse current measurement by large size Rogowski coils 载流母线偏心和倾斜对大尺寸Rogowski线圈冲击电流测量的影响

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357018

Nan-nan Yan, Z. Fu

{"title":"The impact of current-carrying bus decentration and inclination on impulse current measurement by large size Rogowski coils","authors":"Nan-nan Yan, Z. Fu","doi":"10.1109/ICHVE.2012.6357018","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357018","url":null,"abstract":"In order to obtain the waveform of lightning current, the Rogowski coil is installed directly on tall structures such as the UHV transmission line towers. However, the measured results are influenced by the structure involved. This paper investigates the effects of different current-carrying bus positions to the large size Rogowski coil on the measured results. Two different large size coils' frequency spectrum characteristics are analyzed and the effects of coil parameters on frequency band are also discussed. The impact of current-carrying bus decentration and inclination the Rogowski coil measured results is investigated. Both calculation and test strategy study methods are employed for the impact investigation. It is shown that the decentration of current-carrying bus has little impact of less than 4% errors on the measurement results when the current-carrying bus's decentration distance changed from 0 cm to 30 cm. The inclination of the current carrying-bus has more significant impact on the measured results. The error of measured current amplitude changes from 1.17% to 7.4% whilst the inclination angle changes from 0°to 60°under 5kA impulse current, and from 1.5% to 17.9% under 10kA impulse current. The theoretical analysis is in accordance with the experimental results. It is suggested that the Rogowski coil should be located installed perpendicular to the current-carrying bus and the decentration impact is ignorable when the decentration distance is less then 20% of the coil radius.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"45 4 1","pages":"166-169"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81039407","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

Estimation of ground enhancing compound performance using Artificial Neural Network 基于人工神经网络的地面增强复合性能估计

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357068

V. P. Androvitsaneas, F. Asimakopoulou, I. Gonos, I. Stathopulos

引用次数: 8

Electrical field and potential distribution of polymer insulators under the influence of a three phase supply 三相电源影响下聚合物绝缘体的电场和电位分布

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357004

H. L. Rasara, K. Wong

引用次数: 3

Performance of GIS epoxy insulators and related tests GIS环氧绝缘子性能及相关试验

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357026

Shen Wei, Li Dejun, U. Schichler, B. Suermann

引用次数: 0

Distribution of lightning current in the grounding grid for different multilayer soil models 不同多层土壤模型的接地网雷电电流分布

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357015

R. Ziemba, G. Masłowski, G. Karnas, S. Wyderka

引用次数: 6