变压器大卫三角形法故障诊断结果的基本信任分配函数研究

Research on the basic trust distribution function of the transformer fault diagnosis based on the duval triangle method

变压器油中溶解气体分析技术目前已成为变压器故障诊断中最普遍、最重要的技术之一。然而该方法在判断具体某种故障类型的过程中存在一定的不确定性,针对这个问题,提出了基于大卫三角形法的基本信任分配函数研究方法。该方法在大卫三角形的理论基础上,采用有限元法中三节点三角形插值方法来构造变压器故障诊断结果的基本信任分配函数,对判断故障类型的准确性有很好的提高。最后通过实例计算验证了方法的可行性及有效性。

The transformer dissolved gas-in-oil analysis technology has become one of the most common and important technologies in transformer fault diagnosis. However, there are certain uncertainties in judging specific fault type by u- sing this method. To solve this problem, this paper proposes a method research of basic trust distribution function which is based on Dural triangle method. Based on the theory of Duval triangle, this method uses the interpolation method of finite element three-node triangle to construct basic trust distribution function of fault diagnosis result. The accuracy of judging fault types has a great improvement. Finally, the feasibility and availability of this method is proved by practical calculation.