基于PageRank改进算法的电网脆弱线路快速辨识(二):影响因素分析

Rapid Identification of Vulnerable Lines in Power Grid Using Modified PageRank Algorithm——Part Ⅱ: Factors Affecting Identification Results

作为两篇系列文章的第二篇,重点分析适用于快速辨识电网脆弱线路的PageRank改进算法中影响辨识结果的模型参数。首先,在第一篇文章的算法理论基础之上,讨论了模型参数调整对算法性能的影响,并给出了模型参数的合理取值范围。然后,采用基于直流OPA模型的大样本连锁故障仿真来校验本文所提方法的准确性,并提出差异度指标以定量分析所提方法得出的脆弱线路排序效果。分别以IEEE118节点系统和IEEE 39节点系统为算例进行仿真,结果验证了所提方法的高效性。

As the second part of this two-part paper, this part focused on the factors that have impacts on the results obtained by the modified PageRank algorithm for rapid identification of vulnerable lines in power grid. Firstly, based on the principle of the algorithm introduced in the first part of this two-part paper, the influence of model parameters on the performance of algorithm was discussed, and the reasonable range of model parameters was given. Secondly, cascading failure simulation （CFS） based on DC OPA model was used to verify the accuracy of the proposed approach, and a difference indicator was put forward to quantify the differences in the results obtained by CFS and the presented method. The case studies were carried out respectively on the IEEE 118-bus and the IEEE 39-bus test system to demonstrate the validity and effectiveness of the proposed method.