|本期目录/Table of Contents|

[1]兰生,胡忠平,廖福旺,等. 短路电动力对变压器低压绕组辐向稳定性的研究[J].电机与控制学报,2018,22(05):19-24.[doi:10.15938/j.emc.2018.05.003]
 LAN Sheng,HU Zhong-ping,LIAO Fu-wang,et al. Radial stability of transformer low voltage windingsunder sudden short-circuit[J].,2018,22(05):19-24.[doi:10.15938/j.emc.2018.05.003]
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 短路电动力对变压器低压绕组辐向稳定性的研究(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
22
期数:
2018年05
页码:
19-24
栏目:
出版日期:
2018-05-15

文章信息/Info

Title:
 Radial stability of transformer low voltage windingsunder sudden short-circuit
作者:
 兰生1 胡忠平1 廖福旺2 原永滨1
 (1. 福州大学 电气工程与自动化学院,福建 福州 350108;2. 国网福建省电力有限公司电力科学研究院,福建 福州 350007)
Author(s):
 LAN Sheng1 HU Zhong-ping1 LIAO Fu-wang2 YUAN Yong-bin1
 (1. School of Electric Engineering and Automation,Fuzhou University,Fuzhou 350108,China;2. Electric Power Research Institute of Fujian Electric Power Co. ,Ltd. ,Fuzhou 350007,China)
关键词:
电力变压器 场路耦合 磁场分布 电磁力 屈曲分析
Keywords:
 power transformer field-circuit couple magnetic field distribution the electromagneticforce buckling analysis
分类号:
TM41
DOI:
10.15938/j.emc.2018.05.003
文献标志码:
A
摘要:
 针对电力变压器遭遇短路故障时绕组变形问题,采用一种基于有限元的场路耦合研究方法,通过在有限元软件中建模,利用场路耦合方法获取变压器的短路电流、磁场分布,继而计算出绕组短路时辐向电磁力,然后按照绕组的实际参数进行结构屈曲分析,研究绕组辐向稳定性问题。以一台 500 k VA 的三相铁芯式配电变压器为例进行分析,结果表明,低压绕组在短路时承受较大的辐向电磁力,当该力超出临界屈曲值时绕组发生形变甚至绝缘层破坏,缩短电力变压器使用寿命。研究方法和结果对变压器绕组变形等相关研究具有一定实际意义。
Abstract:
 Aiming at the winding deformation when the transformer suffers from short circuit faults,themethod based on a coupled field-circuit of finite element was used. The short-circuit current and magneticfield distribution of the transformer were achieved by modeling in the finite-element software and usingfield-circuit method. The radial electromagnetic force was calculated when the windings encountered theshort-circuit fault by the magnetic field distribution. Then the bucking analysis of structure was carriedout according to the actual parameters of windings to study the radial stability problem of windings. The500 k VA distribution transformer with three-phase cores was researched and analyzed as an example. Theresearch result shows that the winding of low voltage is bored by a larger radial electromagnetic force whenthe short-circuit fault occurs,and if the force exceeds the value of critical buckling,the winding will bedeformed and the insulation layer will be destroyed so that the life of transformer will be shorten. The re-search method and the results will be useful for related studies of transformer windings deformation.

参考文献/References:

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备注/Memo

备注/Memo:
 收稿日期: 2016 - 07 - 21
基金项目: 国家自然科学基金( 61174117) ; 福建省自然科学基金( 2015J01194)
作者简介: 兰 生( 1971—) ,男,博士,副教授,研究方向为高电压与绝缘技术;
胡忠平( 1988—) ,男,硕士研究生,研究方向为变压器绕组的稳定性;
廖福旺( 1962—) ,男,高级工程师,研究方向为高压电气设备绝缘;
原永滨( 1974—) ,女,博士,副教授,研究方向为数据挖掘。
更新日期/Last Update: 2018-07-02