2012 International Conference on High Voltage Engineering and Application最新文献_第7页

Research on the temperature dielectric spectrum of vegetable oil, mineral oil and their relevant oil-impregnated papers 植物油、矿物油及其相关油浸纸的温度介电谱研究

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357045

Pei Guo, R. Liao, J. Hao, Zhiqin Ma, Lijun Yang

{"title":"Research on the temperature dielectric spectrum of vegetable oil, mineral oil and their relevant oil-impregnated papers","authors":"Pei Guo, R. Liao, J. Hao, Zhiqin Ma, Lijun Yang","doi":"10.1109/ICHVE.2012.6357045","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357045","url":null,"abstract":"Features of high flash point, high degradation rate and the reproducibility make vegetable oil possible to be a new kind of insulation oil, which is expected to replace mineral oil. Temperature has a great influence on the dielectric characteristics of insulation oil and the oil-impregnated papers, so with the increasing use of vegetable oil in transformers, it is necessary to study the temperature dielectric spectrum (TDS) characteristics of the vegetable oil-paper insulation to judge whether TDS can be used to evaluate the state of the vegetable oil-paper insulation system. In this paper, TDS of vegetable oil, mineral oil and their relevant oil-impregnated papers at 50Hz were measured and analyzed by using the Concept80 broadband dielectric spectrometer. It can be concluded that: relative permittivity (ε) of vegetable oil and mineral oil at 50Hz decreases when the temperature increases. However, ε of their relevant oil-impregnated papers at 50Hz increases firstly and then decreases with the increase of temperature. Besides, ε of vegetable oil and vegetable oil-impregnated papers is higher than that of mineral oil and mineral oil-impregnated papers respectively, which is helpful to miniaturize the transformer structure. Dissipation factor (tanδ) of both kinds of oil and their relevant oil-impregnated papers at 50Hz increases with the increase of temperature. The rising rate of tanδ of the vegetable oil is obviously greater than that of the mineral oil while tanδ of mineral oil-impregnated papers is slightly greater than that of vegetable oil-impregnated papers, which proves that vegetable oil can slow down the aging of transformer insulation. TDS of both ε and tanδ at 50Hz can be expressed by the cubic function. This provides a new method for using TDS to evaluate the insulation status of the transformer oil-paper insulation system.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"21 1","pages":"562-565"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80897799","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

Condition monitoring of high voltage equipment in smart grid 智能电网高压设备状态监测

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357049

Jian Li, Zhiman He, Lianwei Bao, Youyuan Wang, L. Du

引用次数: 7

Estimation of dielectric response equivalent circuit parameters of transformers using QPSO 用量子粒子群算法估计变压器介电响应等效电路参数

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357112

Tao Zhang, Feilin Ma, Donghui Li, Linyun Wang

引用次数: 2

Novel lightning current sensor based on Printed Circuit Board Rogowski coil 基于印刷电路板Rogowski线圈的新型雷电电流传感器

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357121

Yi Li, Y. Guo, Y. Long, C. Yao, Y. Mi, Junfeng Wu

引用次数: 14

Life prediction for transformer winding insulated with epoxy resin and thickness-reduced paper through voltage endurance tests 通过耐压试验预测环氧树脂和减薄纸绝缘变压器绕组的寿命

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357066

Q. Zhuang, P.H.F. Morshuis, D. Djairam, J. J. Smit

引用次数: 1

Soil temperature profile due to stationary and transient operation of energy cables 能源电缆稳态和瞬态运行引起的土壤温度分布

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357055

J. Plesch, S. Pack, H. Schort

{"title":"Soil temperature profile due to stationary and transient operation of energy cables","authors":"J. Plesch, S. Pack, H. Schort","doi":"10.1109/ICHVE.2012.6357055","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357055","url":null,"abstract":"The supply of electricity, gas and water influences our daily life. All in all the population depends on a satisfactory functionality of these things. Plastic pipe are required to distribute gas and water. The operation of energy cables warm up the soil and may influence and mitigate the material of these plastic pipes. The focus of this paper is placed on crossings of energy cables and plastic pipes. Because of burial depth and low space arrangements under pavement areas it is not always possible to observe the distance between two different pipe systems. The distances can be in the range of 300 mm down to 100 mm, if appropriate measures are set. During the stationary operation with nominal current the energy cable produces loss heat and warms up the surrounding soil and might influence the material of other pipes e.g. gas pipes. Besides the normal operation of energy cables, a transient behaviour caused from an electrical failure produces additional heat in the trench and may cause mitigation on the gas pipe. The aim of this paper was to measure and investigate the temperature profile in the soil on a realistic test setup produced by different types of current stress. All experimental investigations were made in cooperation with an Austrian power utility. The test setup consisted of a medium voltage 20 kV 3-phase cable system with an overhead crossing gas pipe of PE in a distance of 100 mm. To get an idea of the temperature profile caused through the currents, 16 temperature sensors were placed in the volume close to the energy cable and plastic pipe. Appropriate measures as mentioned in the Standard were also tested to reduce the temperature on the surface of the gas pipe. A big number of test results was evaluated and proven on plausibility.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"82 1","pages":"47-50"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90554278","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

The study of partial discharge characteristics of mineral oil using needle - plane electrode configuration base on partial discharge pulse current measurement 基于局部放电脉冲电流测量的针平面电极结构对矿物油局部放电特性的研究

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357034

N. Pattanadech, F. Pratomosiwi, B. Wieser, M. Baur, M. Muhr

{"title":"The study of partial discharge characteristics of mineral oil using needle - plane electrode configuration base on partial discharge pulse current measurement","authors":"N. Pattanadech, F. Pratomosiwi, B. Wieser, M. Baur, M. Muhr","doi":"10.1109/ICHVE.2012.6357034","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357034","url":null,"abstract":"The aim of this paper is to describe the Partial Discharge (PD) pulse current characteristics of the Partial Discharge Inception Voltage(PDIV) testing of mineral oil. This paper represents the experimental investigation of the PD characteristics of the mineral oil, Nynas 4000x, with the water content not more than 10 ppm, at the PDIV levels under various tip radii of needle - plane electrode arrangements. The tungsten needle electrodes with the tip radius of 10μm, 20μm, and 40μm respectively were used as the high voltage electrode while the brass plane electrode with 75 mm diameter was connected to ground via the shunt resistor of 50 ohm. The gap distance of the electrode system was set up at 50 mm. The test experiment, conventional PD measurement, was set up according to IEC 60270. The test procedure was performed in accordance with IEC 61294 under room temperature. PDIV was examined. Then, PD activities at the PDIV and 1.1 PDIV test level were investigated. Furthermore, PD currents were also detected and recorded by a high quality oscilloscope. Phase- resolved PD characteristics of the mineral oil, PD magnitudes and PD pulse currents of the tested electrode systems are analyzed and presented in this paper. From the test results, we will gain the knowledge of PD characteristics of the mineral oil tested by needle - plane electrode systems and we also found that the PD pulse current measurement can be used as an alternative indicator of the mineral oil degradation. The PD pulse current patterns are useful for analysis the oil characteristics as well.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"80 1","pages":"468-471"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89622640","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

Influence of metal deactivator concentration on copper sulfur corrosion in transformer oil 金属钝化剂浓度对变压器油中铜硫腐蚀的影响

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357143

Zonghua Huang

{"title":"Influence of metal deactivator concentration on copper sulfur corrosion in transformer oil","authors":"Zonghua Huang","doi":"10.1109/ICHVE.2012.6357143","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357143","url":null,"abstract":"Insulating oil plays an important role of insulation in transformers. However, copper sulphide deposition on oil-paper insulation can lead to insulation failures in power transformers. In order to research the corrosive properties after adding dibenzyl disulfide (DBDS) and 2, 6-Di-tert-butyl-4-methylphenol (DBPC), and the ability of inhibiting corrosion after adding metal deactivator in transformer oil, a series of thermal aging tests are carried on a certain brand of Nynas and Karamay oil in this paper. First of all, testing the corrosive sulfur compounds by ASTM D1275B method; And Nynas oil test after adding a certain amount of metal deactivator is made at 90 °C to analyze the changing of dissolved gas-in-oil content is analyzed. Experiments and analysis results show that DBDS instead of DBPC is the corrosive sulfur compounds; Metal deactivation agent can effectively prevent the occurrence of sulfur corrosion, but it consumes rapidly with the thermal aging; the oil dissolved gas content significantly changes after adding metal deactivator in oil. All of the above results can be the foundation for a further study on corrosive sulfur and control measure in transformer oil.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"19 1","pages":"435-438"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88642039","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: 6

Space charge dynamics in oil-paper insulation under the combination influence of moisture and temperature 水分和温度共同影响下油纸绝缘的空间电荷动力学

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357110

J. Hao, R. Liao, Lijun Yang

{"title":"Space charge dynamics in oil-paper insulation under the combination influence of moisture and temperature","authors":"J. Hao, R. Liao, Lijun Yang","doi":"10.1109/ICHVE.2012.6357110","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357110","url":null,"abstract":"The main insulation system in HVDC transformer consists of oil-paper insulation. The formation of space charge in oil/paper insulation system can not only affect the dielectric strength, but also relate to the stability and security of HVDC transformer. Moisture and temperature has detrimental effect on the electrical breakdown strength and insulation life of oil-paper insulation. Thus a better understanding the combination influence of the moisture and temperature on the charge distribution in multi-layer oil-paper insulation system becomes increasingly practical importance. In the present study, the space charge dynamics in three layers oil-paper insulation system with three different moisture concentrations (0.28%, 1.32% and 4.96%) under 15 °C and 55 °C were investigated using the PEA technique under 20 kV/mm . The combination influence of the moisture and temperature on the charge distribution in multi-layer oil-paper insulation system was provided. Results show that the higher the moisture content and the temperature of the oil-paper sample, the higher the mobility of the trapped charges in the sample, and the more obvious the positive charge injection and negative charge injection were observed.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"13 1","pages":"294-297"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91014585","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: 6

Switching impulse of long oil gaps of natural ester fluid 天然酯流体长油隙的开关脉冲

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357100

K. Rapp, J. Vandermaar, M. Franchek

引用次数: 3