基于夹角余弦的油浸式变压器故障诊断研究

Research on Fault Diagnosis for Oil-immersed Transformer Based on Included Angle Cosine

基于聚类分析理论,将变量间相似性度量——夹角余弦引入到变压器的故障诊断中。通过分析故障征兆集与标准故障模式集间的夹角余弦来进行故障诊断。文末应用该方法对一油浸式变压器进行故障诊断,实例结果表明所提出的方法是有效的。

Based on theory of cluster analysis, the fault diagnosis method of included angle cosine is put forward. The fault models are ascertained according to included angle cosine among the fault symptom sets and the fault model sets. At last, the method is used to diagnose oil-immersed transformer faults. The results show the effectiveness of the proposed approach.