摘要
针对变压器故障诊断中改良三比值法无法准确表达样本数据对该故障的信任度大小问题,提出一种基于空间插值的基本信任分配函数研究方法。该方法以有限元原理为基础,通过分析改良三比值法每类故障特征空间,采用20节点6面体空间插值方法来构造基本信任分配函数,不仅解决了故障区域边界比值判断模糊问题,而且计算结果可以定量反映各种故障发生的可能性大小,有良好的计算精度。最后通过实例计算和8节点6面体验证,证明了该方法的可行性和有效性。
The sample data can not accurately express the size of fault trust problem by means of improved three-ratio method. One method of basic belief distribution function based on spatial interpolation is advanced to the question in transformer fault diagnosis. The basic belief distribution function is constructed in basis of finite element theory, by analyzing improved three-ratio method each type of fault features space and using twenty-node hexahedral spatial interpolation methods. The method with good accuracy can solve the fuzzy judgment of the boundary ratio and the results can quantitatively reflect the possibility of various failure. Finally, its feasibility and effectiveness is proved by an example calculation and eight-node hexahedral experience certificate.
出处
《吉林电力》
2015年第4期24-27,共4页
Jilin Electric Power
关键词
基本信任分配函数
变压器故障
改良三比值法
空间插值
basic belief distribution function
transformer fault
improved three-ratio method
space interpolation
