一种考虑排序稳定分析的电能质量综合评估新方法  

A New Method for Power Quality Comprehensive Evaluation Considering the Analysis of Sequence Stability

作　　者：刘俊华[1] 罗隆福[1] 张志文[1] 许加柱[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《中国电机工程学报》2013年第1期70-76,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51077045;51077044)~~

摘　　要：在电能质量综合评估时,多位专家应用层次分析法确定其各指标权重,考虑到多位专家意见不统一造成的权重分配错误,运用熵值法求解出各位专家在确定电能质量指标权重时的作用大小,从而求得各指标的最终权重;然后,针对电能质量综合评估指标的不确定性,引入联系度概念,应用联系度处理电能质量综合评估指标的不确定性,将各评估指标值与标准值比较,建立电能质量综合评估的联系度模型;联系度中差异度系数是一个不确定的区间值,对其进行研究,可为电能质量优劣排序做进一步的稳定性分析,因而给电能质量综合评估提供了一种更精确全面的新方法。In the comprehensive evaluation of power quality, the experts determine the weight of every indicator by using analytic hierarchy process. Considering the non-uniform weight distribution errors caused by evaluation differences among experts, the entropy method was applied to get the importance of every expert when they determine the weights of power quality indicators in this paper. Accordingly, obtained the final weight of every indicator.Then,ln allusion to the uncertainty in the comprehensive evaluation of power quality.the connection degree is applied to deal with the uncertainties of the comprehensive evaluation of power quality. Compare the values of the assessment indicators and criteria value.A model for the comprehensive evaluation of power quality based on connection degree was established.The index of uncertainty grade discrepancy in connection degree is an uncertain interval value and study on it. The analysis of sequence stability was conducted for the sorted result of power quality. So a more accurate and comprehensive power quality assessment method was provided.

关 键 词：电能质量评估 熵值法 不确定性 联系度 排序 稳定性分析 

分 类 号：TM71[电气工程—电力系统及自动化]