电力市场环境下，有效的电能质量评价方法十分重要．文中利用逐层拉开档次法进行主客观组合赋权，建立新的区域电网电能质量综合评价模型．首先将区域电网电能质量进行大系统和子系统的层次划分，设计出一套综合评价指标体系，并建立大系统和子系统综合评价函数;然后用序列综合法和拉开档次法确定各层系统的综合权重; 最后由综合评价函数得出每层子系统以及大系统的综合评价值，实现区域电网电能质量综合评价．该模型自下而上地考虑和比较区域电网运行状态对综合评价结果的影响，实现了全面、细致、客观的综合评价，应用该综合评价模型对某供电局的变电站电能质量数据进行的实证分析和评价表明，该方法是有效的．

Effective evaluation methods of power quality are important to the electricity market.In this paper,thesynthesized subjective-objective weight is obtained by using the stepwise scatter degree method,and a comprehensivemodel is constructed to evaluate the power quality of regional power grids.In the investigation,first,a hierarchicaldivision of the large-scale system and the subsystems is performed according to the power quality.Next,anevaluating index system of power quality is designed and the comprehensive evaluating functions of the subsystemsand the large-scale system are established.Then,the synthesized weights of each system are determined by usingthe sequence synthesis method and the stepwise scatter degree method.Finally,the comprehensive power-qualityevaluating values of each subsystem and the large-scale system are calculated by using the comprehensive evaluatingfunctions.The proposed model helps to realize a bottom-up and multi-level comprehensive evaluation of power qualityof regional power grids and obtain comprehensive,particular and objective evaluation results.Case study on apower supply bureau shows that the proposed model is effective.