华中科技大学学报（自然科学版）Issue(10)：88-92,5.DOI:10.13245/j.hust.141018
基于Petri网与D-S证据理论的电力系统故障诊断
Power system fault diagnosis based on Petri net and D-S evidence theory
摘要
Abstract
The power system fault diagnosis problem was investigated in this paper .First ,the power system was modeled by a probability Petri net .Then based on this model ,the diagnosis information was obtained and fused with D-S (Dempster-Shafer) evidence theory .Finally ,the diagnosis result was concluded with the fusion performance .However ,the diagnosis result based on the D-S evidence the-ory may be contrary to the source evidence when dealing with the evidence ,of which some conflicts with each other .To solve the problem ,an improved fusion approach was proposed based on method of weighted average .With the method ,first the weight for each piece of evidence was calculated by its distance away from the average evidence ,which was inversely proportion to the weight .Then accord-ing to the D-S combination rules ,the final result was obtained by the iterative computation of the weighted average evidence .With the proposed approach ,better fusion performances were achieved and higher efficiencies were guaranteed .And the simulation results proved the effectiveness of this ap-proach .关键词
Petri网/信息融合/诊断/D-S证据理论/冲突证据Key words
Petri net/information fusion/diagnosis/D-S evidence theory/conflicting evidence分类
信息技术与安全科学引用本文复制引用
刘妹琴,王毅星..基于Petri网与D-S证据理论的电力系统故障诊断[J].华中科技大学学报（自然科学版）,2014,(10):88-92,5.基金项目
国家自然科学基金资助项目（61222310，61174142）． （）
