基于区间数的城市配电网经济运行模糊综合评价

针对配电网经济运行评价的多维多层次和不确定性,提出一种基于区间数的城市配电网经济运行模糊综合评价方法。利用区间层次分析法计算指标权重,合理处理了专家判断的不确定性,同时为了避免综合得分区间数发散的问题,引入区间数可能度的概念对单因素的综合权重进行修正;考虑到不同地区配电网的差异,采用区间梯形隶属度函数,同时定义了区间数中心对单因素的区间隶属度进行修正,避免了单因素得分区间数的发散;最后运用区间数符合度的概念,并依据评价等级标准区间数,确定综合得分区间数的评价等级。实例分析验证了该评价方法的可行性。

A Fuzzy Comprehensive Evaluation Method for Economic Operation of Urban Distribution Network Based on Interval Number

In view of the multi-dimensional and multi-level evaluation factors including uncertainties in the evaluation of distribution network economic operation,a fuzzy comprehensive evaluation method based on interval number is proposed in this paper.Firstly,considering the uncertainty of expert judgment,interval analytic hierarchy process(AHP) is used to calculate index weights.And in order to avoid the divergence of overall score,the concept of possible degree of interval number is introduced to revise single factors’ weights.Then take into account differences in the distribution network of different regions,interval trapezoidal membership functions is used to calculate single factors’ membership,but they are divergence,so the center of the interval number is defined to amend them.Finally,the rating scale of overall score is determined by the concept of interval conformity degree with the rating scale interval standard.Thus,the conclusive results of case analysis demonstrates the feasibility of the proposed method.