|Table of Contents|

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

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[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年01
Page:
29-34
Research Field:
Publishing date:

Info

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

Author(s):
 CHEN Qing-guo ZHUGE Xiang-li LIU He-qian CHI Ming-he WEI Xin-lao

 ( MOE Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology,Harbin 150080,China)
Keywords:
converter transformer barrier system electric field distribution nanometer SiC nonlinearity
PACS:
TM 215. 6
DOI:
10. 15938 /j. emc. 2016. 01. 005
Abstract:
 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 non-linear nano SiC was explored,and the nano SiC modified pressboard samples were manufactured,the die-lectric 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 ra-tio but not obviously and there is a slight rising trend with the electric field strength increasing. The con-ductivity 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 val-ue. 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 elec-tric field distribution in oil /pressboard insulation structure more homogeneous under DC and polarity re-versal voltages.

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Last Update: 2016-03-21