改进证据理论及其在电力系统故障诊断中的应用  

Improved evidence theory and its application in fault diagnosis of power system

作　　者：李玲玲[1,2] 景丽婷[1] 马东娟[1] 李志刚[1] 

机构地区：[1]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130 [2]天津大学电气与自动化工程学院,天津300072

出　　处：《工程设计学报》2012年第6期485-488,共4页Chinese Journal of Engineering Design

基　　金：河北省科技支撑计划项目(10215682);河北省建设科技研究计划项目(2011-147,2009-250)

摘　　要：针对D-S证据理论中高度冲突的证据难以融合的问题,提出一种基于海明距离的证据合成规则.首先根据冲突系数的大小判断证据冲突程度,利用海明距离确定的相似度区分每条证据,并赋予权重,然后对原始基本信度分配函数进行重新分配,最终得到更加合理的合成结果.将该数据融合方法用于电力系统的故障诊断实例中,表明该方法合理有效,计算结果更符合实际.A new Dempster-Shafer evidence combination rule based on the Hamming distance was proposed aiming at solving the fusion problem of highly conflicting evidence. At first, we judged the evidence conflict degree according to the size of the conflict coefficient, the Hamming distance was used to determine the similarity to distinguish each of evidence, and the weight was given to the evidence. Then the original basic probability distribution function was redistributed, finally the more reasonable the syncretic result was obtained. At last, the data fusion method was ap- plied to power system fault diagnosis example, the calculation result indicated that the method wa~ effective and reasonable, and the conclusion was more actual.

关 键 词：证据理论 海明距离 电力系统 故障诊断 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]