电力变压器故障诊断的可拓集法

基于可拓理论，在传统油中溶解气体分析DGA(Dissolved Gas Analysis)三比值法基础上，提出一种可拓集变压器故障诊断方法。首先，建立三比值法的物元模型，然后给出点对区间的可拓相关函数，利用该函数计算进行变压器故障诊断。仿真计算证明该方法能克服传统三比值法的编码不全，不能诊断多重故障的缺陷，提高了诊断精度。

Extension set method for power transformer fault diagnosis

Based on extension theory and conventional DGA(Dissolved Gas Analysis) three-ratio method, the extension set method to diagnose transformer fault is proposed. The matter-element models are established first for the three-ratio method. Then the extended relation functions of a point to an interval are offered, which are used to diagnose transformer faults. Simulation proves that the proposed method can overcome the drawbacks of the conventional three-ratio method,i.e. incomplete coding and lack of multi -fault diagnosis. It enhances diagnosing accuracy.