广东电力2016，Vol.29Issue(12)：115-120,6.DOI:10.3969/j.issn.1007-290X.2016.12.021
基于振动的油浸式电力变压器短路累积效应试验研究
Experiment on Short Circuit Cumulative Effect of Oil-immersed Power Transformer Based on Vibration Signals
摘要
Abstract
In allusion to the problem of sudden fault of the transformer probably caused by winding cumulative damages which may seriously threaten safe and stable operation of the power grid,one oil-immersed power transformer is taken for studying short circuit experiments.By analyzing change law of vibration signals of the oil tank wall before and after experiments and in the process of short circuit experiments,it is observed that after several times of short circuit impact,no matter whether change of short circuit reactance exceeds standard or not,frequency spectrum and amplitude of vibration signals of the transformer,linear relationship between fundamental frequency amplitude of vibration signal of the iron core and square of applied voltage as well as linear relationship between fundamental frequency amplitude of winding vibration signals and square of load current flowing through winding will all change obviously.Experimental results indicate that repeated short circuit impact will produce mechanical cumulative damages inside the transformer and vibration signals can sensitively reflect characteristic quantity of this kind of short circuit cumulative effect.关键词
油浸式电力变压器/振动/短路试验/机械累积损伤/特征量Key words
oil-immersed power transformer/vibration/short circuit experiment/mechanical cumulative damage/characteristic quantity分类
机械制造引用本文复制引用
杨毅,张楚,刘石,杜胜磊,李力,杨贤..基于振动的油浸式电力变压器短路累积效应试验研究[J].广东电力,2016,29(12):115-120,6.基金项目
广东电网有限责任公司科技项目(GDKJQQ20153006) （GDKJQQ20153006）
中国南方电网有限责任公司科技项目(K-GD2014-170) （K-GD2014-170）
