Permittivity distribution optimization for multi-layer dielectric FGM insulator

被引：2
作者：
Li W. [1 ]
Liu Z. [1 ]
You X. [1 ]
Li X. [1 ]
Zhang G. [1 ]
Dong Q. [2 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] China Electric Power Research Institute, Beijing
来源：
Hsi An Chiao Tung Ta Hsueh | / 10卷 / 19-26期
关键词：
Electric field distribution; Functionally graded material; Solid insulation;
D O I：
10.7652/xjtuxb201610004
中图分类号：
学科分类号：
摘要：
At the present there lacks proper optimization method for internal dielectric properties of dielectric functionally-graded-material (d-FGM). An optimization algorithm of internal permittivity distribution for multi-layer permittivity FGM (ε-FGM) insulator under AC voltage is proposed, which aims at weakening the maximum electric field (e-field) strength along the insulator surface. According to design parameters, such as current e-field strength, objective e-field value and permittivity range, the permittivity value of each layer is self-adaptively updated with iterations to obtain the optimized permittivity distribution. The iterative coefficient and shrinking coefficient are adjusted to control the convergence process and shorten calculation period. Compared with uniform insulator, e-field distribution inside and along the surface of ε-FGM insulator is more uniform and the maximum e-field strength along surface is weakened more than 60%, and the layer thickness of the multi-layer ε-FGM insulator ought to be set as small as possible under the allowed fabrication conditions. The maximum surface e-field strength decreases nonlinearly with the increasing permittivity upper limit and saturates as the upper limit reaches certain threshold value, which has positive correlation with the maximum e-field strength before optimization. © 2016, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
引用
收藏
页码：19 / 26
页数：7
相关论文
共 21 条
  • [1] Yu H., Jiang W., Xu R., Analysis of a short circuit fault in a 220 kV gas insulated switchgear, High Voltage Apparatus, 49, 8, pp. 115-118, (2013)
  • [2] Wang X., He P., Liu Y., Et al., Analysis and treatment of a 500 kV hybrid gas insulated switchgear accident, High Voltage Apparatus, 50, 1, pp. 129-132, (2014)
  • [3] Saito Y., Michizono S., Anami S., Et al., Surface flashover on alumina RF windows for high-power use, IEEE Transactions on Electrical Insulation, 28, 4, pp. 566-573, (1993)
  • [4] Cravey W.R., Devlin G.L., Mayberry C.S., Et al., Investigation of a high voltage vacuum insulator for the DARHT accelerator, IEEE International Pulsed Power Conference, pp. 555-558, (1997)
  • [5] Shoup R.W., Long F., Martin T.H., Et al., Design validation of the PBFA-Z vacuum insulator stack, IEEE International Pulsed Power Conference, pp. 1608-1613, (1997)
  • [6] Stih Z., High-voltage insulating system-design by application of electrode and insulator contour optimization, IEEE Transactions on Electrical Insulation, 21, 4, pp. 579-584, (1986)
  • [7] Sun X., Peng Z., Dang Z., Et al., Study on electrical stress grading of composite insulators for UHV transmission lines, High Voltage Apparatus, 44, 6, pp. 527-530, (2008)
  • [8] Ma A., Yang X., Lu X., Et al., 3D electric field calculation and its inverse problem analysis of disk-type insulator in GIS, High Voltage Engineering, 36, 5, pp. 1217-1221, (2010)
  • [9] Sima W., Shi J., Yuan T., Et al., Electric field calculation of ultra high voltage composite insulator and optimization design of corona ring structure based on neural network and genetic algorithm, High Voltage Engineering, 38, 2, pp. 257-265, (2012)
  • [10] He J., Xie J., Hu J., Progress of nonlinear polymer composites for improving nonuniform electrical fields, High Voltage Engineering, 40, 3, pp. 637-647, (2014)
123