基于模糊融合证据理论电力变压器状态的评估

Assessment of Power Transformer Condition Based on Fuzzy Fusion Evidonce Theory

论文通过对目前国内电力变压器状态检修现状的分析以及综合各种文献资料,利用模糊理论的思想,提出一种采用模糊综合评判结合证据理论来评估电力变压器工作状态的方法,验证了融合证据理论的模糊方法的评估结果比单一的采用模糊理论评估的结果更准确。此方法根据影响变压器健康状态的因素与其内部器件的对应关系,通过模糊理论建立隶属度函数,得出相应内部器件的健康状态,然后,用证据理论把每个内部器件的健康状态当做一组证据,通过证据合并,最终得出变压器当前健康状态的评估。

Based on the current status of the domestic power transformer overhaul the state＇s analysis and integration of literature,the idea of fuzzy theory is used to propose a combination of evidence theory fuzzy comprehensive evaluation to assess the state of the power transformer working methods adopted,and to verify the integration of evidence theory fuzzy assessment method is more accurate than a single result using fuzzy theory assessment.This method is based on the correspondence between the factors affecting the health status of the transformer and its internal components,the establishment of membership function by fuzzy theory,the health status of the corresponding drawn inside the device,and then uses the evidence theory to each health state of the internal components of the evidence as a group by merging the evidence,and ultimately comes to assess the health status of the current transformer.