2012 International Conference on High Voltage Engineering and Application最新文献_第5页

One-step preparation and application of semiconductive and durable superhydrophobic coating 半导体耐久超疏水涂层的一步法制备与应用

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357124

Zhengyong Huang, Jian Li, Xinzhu Yan

引用次数: 1

Influence of trace water and oxygen on characteristic decomposed components of SF6 under partial discharge 部分排放条件下微量水和氧对SF6特征分解组分的影响

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357037

Zeng Fuping, Tang Ju, Z. Xiaoxing

{"title":"Influence of trace water and oxygen on characteristic decomposed components of SF6 under partial discharge","authors":"Zeng Fuping, Tang Ju, Z. Xiaoxing","doi":"10.1109/ICHVE.2012.6357037","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357037","url":null,"abstract":"Monitoring the contents of decomposed components of SF6 in order to identify the internal insulation faults of electrical equipment with SF6 dielectric is a common practice. Partial discharges (PDs) can lead to the decomposition of the SF6 dielectric. The new reactions also cause the final decomposed components to differ due to the different concentrations of H2O and O2 even under the same strength of PD. Thus, the accuracy of assessing inner insulation faults is affected when using the concentration and corresponding change of decomposed components. In this work, two main characteristic components SO2F2 and SOF2 was researched. The purpose is to perform influence analysis of trace H2O and O2 on the characteristic components. Research findings indicated that the amount of SOF2 strongly correlates to the amount of trace H2O, whereas the amount of SO2F2 is weakly related to trace H2O. Furthermore, the dilution effect of trace O2 on SOF2 obviously exceeds that on SO2F2.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"42 1","pages":"505-508"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79375538","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

Barrier diameter effect on the behaviour of transformer oil submitted to AC voltage 屏障直径对变压器油在交流电压下的性能的影响

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357047

F. Guerbas, M. Zitouni, A. Boubakeur, A. Beroual

{"title":"Barrier diameter effect on the behaviour of transformer oil submitted to AC voltage","authors":"F. Guerbas, M. Zitouni, A. Boubakeur, A. Beroual","doi":"10.1109/ICHVE.2012.6357047","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357047","url":null,"abstract":"Dielectric interfaces can have a significant effect on the insulating performances of HV apparatus. The oil/solid interface represents a relatively weak component of an insulation system in power transformer. Therefore, when we are considering the effect of oil breakdown in oil filled transformer, we should consider the interactions which electrical discharges may have with solid surfaces. This work is devoted to the influence of insulating barrier on the behaviour of transformer oil under ac voltage in point-plane electrode configuration. The influence of the characteristics of barrier such as its position between electrodes, and its diameter on the pre-breakdown and breakdown phenomena is investigated. It is shown that the insertion of barrier near the point electrode increases the breakdown voltage and leads to decrease the pre-breakdown charge. The increase of breakdown voltage is due to the channel elongation of the disruptive charge. By determination of the pre-breakdown charge and breakdown voltage, we can estimate the optimal position of the barrier. The barrier diameter influences the breakdown voltage, the pre-breakdown charge and the trajectory of discharge.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"4 1","pages":"570-574"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83386507","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

Study of electrical field and micro arcing in a wooden supporting structure using Finite Element Method 用有限元法研究木制支撑结构的电场和微弧

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357002

H. L. Rasara, K. Wong

引用次数: 2

Numerical simulation of DC positive corona discharge under atmospheric environment 大气环境下直流正电晕放电的数值模拟

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357041

Feifei Wu, R. Liao, Xinghua Liu, Fan Yang, Lijun Yang, Zhi Zhou, Y. Luo

引用次数: 1

Dissolved gases generated of partial discharges and electrical breakdown in oil-paper insulation under AC-DC combined voltages 交直流复合电压下油纸绝缘局部放电和击穿产生的溶解气体

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357116

Zhiman He, Linjie Zhao, Yuming Zhao, Xiaqing Sun, T. Jiang, Lianwei Bao, Jian Li

{"title":"Dissolved gases generated of partial discharges and electrical breakdown in oil-paper insulation under AC-DC combined voltages","authors":"Zhiman He, Linjie Zhao, Yuming Zhao, Xiaqing Sun, T. Jiang, Lianwei Bao, Jian Li","doi":"10.1109/ICHVE.2012.6357116","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357116","url":null,"abstract":"One of the major insulations of high voltage direct current (HVDC) converter transformers is oil-paper insulation. Valve-side windings withstand complex stresses combined with AC, DC, and pulse voltages. Partial discharge in oil-paper insulation is a major incipient fault of an HVDC converter transformer inside insulation. There are few studies on the development characteristics of partial discharge in oil-paper insulation and dissolved gases in oils of an HVDC converter transformer. Based on artificial insulation defect models of oil-paper insulation, the present study investigates the variation characteristics of dissolved gases in the discharge development process. Experiment and analysis results show that the characteristics of dissolved gases in oils under AC-DC combined voltages are appreciably different with those under an AC voltage. These results provide theoretical support for further research on partial discharge and on dissolved gases of other internal insulating defects and the fault diagnosis of HVDC converter transformers.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"53 1","pages":"314-317"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86868086","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

Experimental evaluation on dielectric and thermal characteristics of nano filler added transformer oil 加入变压器油的纳米填料介电特性和热特性的实验评价

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357077

S. Pugazhendhi

{"title":"Experimental evaluation on dielectric and thermal characteristics of nano filler added transformer oil","authors":"S. Pugazhendhi","doi":"10.1109/ICHVE.2012.6357077","DOIUrl":"https://doi.org/10.1109/ICHVE.2012.6357077","url":null,"abstract":"Liquid dielectrics play a major role in the insulation system used in high voltage equipments. The most commonly used liquid dielectric is transformer oil which serves the dual purpose as insulation and a coolant. It also acts as insulation between the conductingparts and as an arc quenching medium. Moreover the breakdown strength of the paper and the pressboard insulation depends on the properties of the oil in which it is impregnated. Therefore investigations have been attracted towards the development of nano fluids with better thermal and dielectric properties. In this work, ceramic nano particles are chosen because of their electrical insulating property. Because of higher relative permittivity Zirconia(ZrO2) and Titania(TiO2) nano particles are used here. The dielectric and thermal properties are measured for different concentrations of nanofillers. AC and Impulse breakdown voltage measurements were performed as per IS 6792:1972 and IS 11697:1986 respectively. The specific resistivity and the dielectric dissipation factor measurement were carried with reference to IS 6103:1971 and IS 6262:1971. The kinematic viscosity and flash point are measured as per IS 1448 Part-25:1970 and IS 1448 Part-21:1970 respectively.","PeriodicalId":6375,"journal":{"name":"2012 International Conference on High Voltage Engineering and Application","volume":"14 1","pages":"207-210"},"PeriodicalIF":0.0,"publicationDate":"2012-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90695479","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: 48

Cloud model-based risk assessment of power transformer 基于云模型的电力变压器风险评估

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357092

Yaolong Wang, Xianping Zhao, J. Bian, R. Liao, Lijun Yang

引用次数: 1

Calculation of peak output current of short circuit test equipment used for the low-voltage switching devices 低压开关设备短路试验设备输出电流峰值计算

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357007

Feng Wang, Yan Qi, Z. Fu

引用次数: 3

Fault location and type identification on transmission line using a novel traveling wave method 基于行波法的输电线路故障定位与类型识别

2012 International Conference on High Voltage Engineering and Application Pub Date : 2012-11-26 DOI: 10.1109/ICHVE.2012.6357109

Jianyin Liu, Zhong Zheng

引用次数: 10