第24卷第3期2009年9月Vol.24 No.3Sep.2009电力科学与技术学报JOURNAL OF EIECTR1C POWER SCIENCE AND TECHNOLOGY改进型灰色关联算法在变压器故障诊断中的应用伍伟慧，周媛媛，周力行长抄理工大学电代与信总1程学院期南长杪41003摘要灰色关联分析已应用于电力变压器故障诊断传统基于单一故障标准模式向良灰色关联分析算法的油中 溶解气体分析DGA诊断模减精度有限为此提出一种改逬型灰色关联算法该算法在充分考虑DCA数据分散 性的基础上，将每类故障的标准故障模式向就由原来算法中的1个扩充到6个，并给岀每类故障的DGA数据分布 范慟,增大诊断信息试;利用关联分析原理，求岀待诊模式与各类故障标准凑式的灰色关联度,得到故障诊断判定.实例分析证明，所夷算法的诊断准确率髙于原来的普通灰色关联方法.关 键 词变压器;改进型灰色关联;油中溶解气体分析；故障诊断 中图分类号TM401M文献标识码A文章编号1673-9140200903-3045X5Application of improved grey relational algorithm infaults diagnosis of power transersWU Wei-hui,ZHOU Yuan-yuan,ZHOU U-xingSchool of Electrical and Infonnation Enpneering,Chanpha University of Science and Technology.Changsha 410004,ChinaAbstract Grey relational analysis GRA has applied in power transer faults diagnose Traditional Dissolved Gas Analysis DGA diagnostic model based on the GRA algorithm of single fault standard model vector has limited precision An improved GRA algorithm is presented in this paper The dispersion of DGA data is considered ； every kind of fault standard model vector is extended to six vectors; the DGA data distribution range for every kind of fault is given; and the diagnose infonnation is thus increased； the grey correlation degree of diagnostic model and all kinds of fault standard models are ob tained to realize the fault diagnosis by using grey relational analysis theory.Example analysis results prove that the diagnostic accuracy of the presented algorithm is much higher than that of the others Key words transer ； grey relational algorithm ； dissolved gas analysis DGA ； fault diagnosis收稿日期2009X38墓金项目期南省自教科学基金04JJ40034通讯作者周力行男博士教授主妥从事髙压设备绝嫌在线监閔及故障诊噺的研究;Ermi】zlawye