|本期目录/Table of Contents|

[1]刘文里,白仕光,李祎春,等.高压直流换流变压器油纸绝缘线性与非线性电场分析[J].电机与控制学报,2017,21(09):80-87.[doi:10.15938/j.emc.2017.09.011]
 LIU Wen-li,BAI Shi-guang,LI Yi-chun,et al.Analysis of linear and nonlinear electric field of HVDC convert transformer oil-board insulation[J].,2017,21(09):80-87.[doi:10.15938/j.emc.2017.09.011]
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高压直流换流变压器油纸绝缘线性与非线性电场分析(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
21
期数:
2017年09
页码:
80-87
栏目:
出版日期:
2017-09-01

文章信息/Info

Title:
Analysis of linear and nonlinear electric field of HVDC convert transformer oil-board insulation
作者:
?刘文里1 白仕光2 李祎春3 李佳欣4
?(1. 哈尔滨理工大学 电气与电子工程学院,黑龙江 哈尔滨 150080;2. 大唐东北电力试验研究所有限公司,吉林 长春 130015;3. 内蒙古东部电力有限公司物资分公司,内蒙古 呼和浩特 010000; 4. 国网通辽供电公司,内蒙古 通辽 028000)
Author(s):
?LIU Wen-li1 BAI Shi-guang2 LI Yi-chun3 LI Jia-xin4
?(1. School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China; 2. Datang Northeast Electric Power Test & Research Institute,Changchun 130015,China;- 3. China State Grid Eastern Inner Mongolia Electric Power Company Limited Material Branch Company; 4. China State Grid Eastern Inner Mongolia Electric Power Company Limited Tongliao Power Supply Company)
关键词:
换流变压器 电场分布 极性反转 油纸绝缘 非线性材料
Keywords:
converter transformerelectric field distributionpolarity reversaloil-board insulationnonlinear material
分类号:
TM 401
DOI:
10.15938/j.emc.2017.09.011
文献标志码:
A
摘要:
换流变压器油纸绝缘材料的电导率受电场强度与温度的影响呈非线性变化。为研究材料非线性对换流变压器极性反转电场分布的影响,对油纸绝缘电导率的非线性变化规律进行了数值拟合,利用 RC 等效电路进行了计算与分析,并运用 ElecNet 有限元软件对一台 ± 400 kV 换流变压器网侧和阀侧绕组端部电场进行了仿真。计算与仿真结果表明非线性材料极性反转完成时油中最大电场强度为线性材料的 78% ,但稳态时油中电场强度是线性情况下的 36 倍。电导率的电场强度非线性会均化由温度梯度带来的电场梯度。最后根据计算与仿真结果提出绝缘的改进方向。
Abstract:
Converter transformer oil-board insulating material’s conductivity changes nonlinearly with electric field intensity and temperature. This nonlinear change rule is data-fitted in order to study the influences of material’s nonlinearity to the distribution of converter transformer polarity reversal electric field. Calculation and analysis were carried out using RC equivalent circuit. The upper part of line and valve side windings’electric field of one ± 400 kV converter transformer were simulated by using the finite element software ElecNet. The results show that while the polarity reversal finishes,the maximum field strength of nonlinear material is of 78% compared with linear material. While at steady state,the field strength in the nonlinear oil is 36 times of linear oil. The conductivity change caused by electric field would homogenize the the electric field gradient caused by the temperature gradient. Finally,a few improvement measures are offered according to calculation and simulation results.

参考文献/References:

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备注/Memo

备注/Memo:
?收稿日期: 2015 - 06 - 18
?基金项目: 国家自然科学基金( 51207037)
作者简介: 刘文里( 1956—) ,男,硕士,教授,研究方向为变压器的理论研究、结构设计与计算; 白仕光( 1991—) ,男,硕士,研究方向为变压器电、磁场计算与分析; 李祎春( 1990—) ,男,硕士,研究方向为变压器电、磁场计算与分析; 李佳欣( 1990—) ,女,硕士,研究方向为变压器电、磁场计算与分析。
更新日期/Last Update: 2018-02-06