基于合作博弈和改进TOPSIS的电能质量评估方法研究

Research on evaluation method of power quality based on cooperative game theory and improved TOPSIS

对电网的电能质量开展合理的综合评估,是科学检测电能优劣性以及实施有效管控的重要依据。因此,提出了一种基于合作博弈和改进TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)的电能质量评估方法。首先建立了评价指标体系,利用合作博弈的理论对多种权重结果进行组合,获得各个评价指标的优化权重,避免了单一赋权方法的不足。然后运用改进后的TOPSIS方法开展评估,根据相对贴近度大小进行排序对比。利用C++对算法进行编程后对某供电地区的电能质量开展评估。结果说明基于合作博弈理论确定的优化权重兼顾了主客观的影响,利用改进TOPSIS的评估方法能够实现电能质量的综合评估。

The reasonable and comprehensive evaluation of power quality of power system is an important basis for scientific detection of power quality and effective management and control.Therefore,this paper proposes a power quality comprehensive evaluation method based on cooperative game theory and improved TOPSIS.Firstly,an index system for quantitative evaluation of power quality is established,which avoids the shortcoming of single weighting method.Then,by using the cooperative game theory,the optimized weights of various evaluation indexes are obtained.Finally,the improved TOPSIS method is adopted to evaluate the power quality,and the magnitude of the relative proximity is used for sorting and comparing.After the algorithm is programmed by C++,the power quality of a power supply area is evaluated comprehensively.The results of the example show that the optimal weights determined by the cooperation game theory take into account both subjective and objective effects,the evaluation method based on the improved TOPSIS can effectively evaluate the power quality comprehensively.