摘要
随着电力系统容量的不断增加,短路故障产生的电动力会引起变压器绕组变形等辐向稳定性的问题,有必要对变压器的绕组进行屈曲分析和弹塑性力学分析。本文采用ANSYS软件对中压侧三相短路状下变压器绕组进行屈曲和弹塑性力学分析,针对50MVA三绕组主变建模,获取中压绕组辐向安全稳定系数。通过事故实例予以验证,此方法对变压器短路影响分析具有一定参考价值,还可对大型变压器的设计及装配带来一定的借鉴意义。
With the increase of the power system capacity,it is necessary for the transformer windings to carry on the buckling and elastic-plastic mechanics analysis,because electrodynamic force that the short-circuit trouble produces can cause deformation of transformer windings and the problem of the stability in radial direction.The buckling and elastic-plastic mechanics of transformer windings wereanalyzed by ANSYS software in the medium voltage winding of the three-phase short circuit in thispaper.The radial stability coefficient of the medium voltage winding was obtained by the model of50MVA main transformer of three windings.This method has certain reference value for analysis of transformer short-circuit impact,and also has some reference significance for the design and fabrication of large transformers according to the verified accident examples.
作者
胡忠平
廖福旺
兰生
Hu Zhongping;Liao Fuwang;Lan Sheng(College of Electrical Engineering and Automation Fuzhou University, Fuzhou 350108;Electric Power Research Institute of Fujian Electric Power Co., Ltd, Fuzhou 350007)
出处
《电气技术》
2017年第4期32-38,共7页
Electrical Engineering
基金
福建省自然基金资助项目(2015J01194)
关键词
电力变压器
场路耦合
电磁力
屈曲分析
弹塑性力学
power transformer
field-circuit couple
the electromagnetic force
buckling analysis
elastic-plastic mechanics
