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由于电能质量指标的多样性,科学地综合评估电能质量存在一定的困难.针对目前电能质量评价时指标组合赋权中普遍存在的不确定性,把联系数引入组合赋权研究.首先把同一指标的主观赋权值与客观赋权值用区间数表示,再把此区间数转换成集对分析中的联系数,并计算出联系数的模,然后把模作为主观权重和客观权重的相互作用值给指标定权,最后利用不确定系数i开展综合评估初值的不确定性分析,检验其综合评估结果的稳定性,据此确定所评电能质量等级,提高了评估结论的科学性和可靠性.
Because of the diversity of power quality indexes, it is difficult to comprehensively evaluate the power quality scientifically.According to the ubiquitous uncertainty in the power of the combination of indicators when evaluating the power quality, the connection number is introduced into the study of portfolio weighting.First, The subjective weighting value and the objective weighting value are expressed by the interval number, and then the interval number is converted into the number of connection in the pairwise analysis and the modulus of the connection number is calculated, and then the modulus is used as the interaction of subjective weight and objective weight Value to the index weight, and finally use the uncertainty coefficient i to carry out the comprehensive evaluation of the initial value of the uncertainty analysis to test the stability of its comprehensive assessment results, thus determine the quality rating of the assessment of electricity to improve the evaluation of the conclusions of the scientific and reliable Sex.