Electric field distribution of converter transformer barrier system using nano modified pressboard

被引：0
作者：
Chen Q.-G. [1 ]
Zhuge X.-L. [1 ]
Liu H.-Q. [1 ]
Chi M.-H. [1 ]
Wei X.-L. [1 ]
机构：
[1] MOE Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2016年 / 20卷 / 01期
关键词：
Barrier system; Converter transformer; Electric field distribution; Nanometer SiC; Nonlinearity;
D O I：
10.15938/j.emc.2016.01.005
中图分类号：
学科分类号：
摘要：
In order to solve the problem of electric field distribution concentration in converter transformer barrier system under DC and polarity reversal voltages, the method of modification to pressboard with nonlinear nano SiC was explored, and the nano SiC modified pressboard samples were manufactured, the dielectric properties of modified pressboard was measured. The electric field distribution simulation model of converter transformer barrier system was built considering its practical structure, and the homogenization effect of pressboard modification on barrier system electric field distribution was analyzed. The experiment results show that the permittivity of modified pressboard increases with the increase of nano SiC doping ratio but not obviously and there is a slight rising trend with the electric field strength increasing. The conductivity of modified pressboard increases with the increase of nano SiC doping ratio, and it shows obvious nonlinearity between conductivity and electric field strength when the doping ratio exceeds a certain value. The simulation results show that the electric field strength in pressboard can be reduced by using nano modified pressboard, and electric field strength in oil will be heightened, which can make the electric field distribution in oil/pressboard insulation structure more homogeneous under DC and polarity reversal voltages. © 2016, Editorial Department of Electric Machines and Control. All right reserved.
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页码：29 / 34
页数：5
相关论文
共 12 条
  • [1] Li L., Development of HVDC transmission technology and its role in power network in China, Electrical Equipment, 5, 11, pp. 1-3, (2004)
  • [2] Yuan Q., Development planning and research accomplishments of UHVDC power transmission in China, Electrical Equipment, 8, 3, pp. 1-4, (2007)
  • [3] Peng Y., Development and prospect of HVDC transmission, Hunan Electric Power, 27, 1, pp. 52-57, (2007)
  • [4] Li J., Luo L., Xu J., Et al., Study on electric field characteristics at ends of valve-side winding in converter transformer, High Voltage Engineering, 32, 9, pp. 121-124, (2006)
  • [5] Zhou H., Zhong Y., Applicable occasions of UHVAC/UHVDC transmission and their technology comparisons in China, Electric Power Automation Equipment, 27, 5, pp. 6-12, (2007)
  • [6] Zhang Y., The control technique and new converting technique of DC high voltage transmission, Machine Building & Automation, 37, 2, pp. 123-125, (2008)
  • [7] Moser H.P., Dahinden V., Transformerboard II, pp. 190-196, (1987)
  • [8] Zhang L.X., Chen M.S., Peng Z.R., Et al., The DC electric field analysis of valve side outlet device in converter transformer considering nonlinear and anisotropic characteristics, IEEE International Conference on Solid Dielectrics, pp. 963-966, (2013)
  • [9] Rashwan M.M., Mcdermid W., Hammer F., Et al., On the design, testing, and operating experience of composite dry bushing in HVDC, International Conference on AC and DC Power Transmission, pp. 325-330, (1991)
  • [10] Liu P., Peng Z.R., Cao L., Et al., Electric field calculation and structural optimization of ±800 kV converting transformer bushing outlet terminal, IEEE International Conference on Properties and Applications of Dielectric Materials, pp. 840-843, (2006)
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