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物元理论和证据理论相结合的电能质量综合评估

, PP. 383-391

Keywords: 电能质量,物元理论,证据理论,综合评估

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Abstract:

针对电能质量综合评估中存在的不确定性及主观性,提出了一种基于物元理论和证据理论相结合的电能质量综合评估方法.该方法运用可拓学中的物元理论建立电能质量的物元模型,利用关联函数将电能质量各项评估指标与各个质量等级的评价区间之间的隶属关系定量化,并将其进行归一化处理,进而获得各指标的基本信度函数;然后利用熵权法与G1法相结合的复合赋权法确定电能质量各评估指标的权重,用来修正原始证据的基本信度函数,在此基础上,利用证据组合规则对其进行融合,从而得到电能质量的综合评估结果.实例计算表明,该方法最大限度地减少了评估过程中的不确定性,能够得到更精确,客观的综合评估结果.

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