多层次电压暂降评价方法研究

为科学合理地评估电压暂降事件的严重度,提出了一种基于改进的层次分析法和熵权法的多层次电压暂降评价方法。该方法通过构造比较矩阵,判断矩阵及拟优一致矩阵计算出每次暂降事件持续时间和暂降幅值的相对重要性,并对这两个特征值进行客观赋权,从单次电压暂降事件与监测站点两个角度,分层次评价电压暂降严重性,实例分析表明该评价方法的计算结果与实际电压暂降的严重程度相吻合。

Multi-level Evaluation Method of Voltage Sag

To scientifically and reasonably evaluate the severity of voltage sags,this paper presents a multi-level evaluation method of voltage sag based on combination of improved analytic hierarchy process and entropy weight method.This method calculates the relative importance of the duration and sag amplitude of each sag event by constructing comparison matrix,judgment matrix and quasi-optimal consistent matrix,and gives the objective weight of these two eigenvalues.From the perspective of single voltage sag event and monitoring station,this method evaluates the severity of voltage sag in different levels.The calculation results obtained by this evaluation method well correspond to actual severity of voltage sag.